B&B Electronics 3PCIOU1
Contents
1. Multi Interface PCI Bus Serial Cards RS 232 RS 422 RS 485 Models 3PCIU2 3PCIUA 3PCIU8 Non Isolated and Models 3PCIOU1 3PCIOU2 3PCIOU4 Isolated BH electronics MANUFACTURING COMPANY Document Number 3PCI 4310m BH electronics MANUFACTURING COMPANY International Headquarters B amp B Electronics Mfg Co Inc 707 Dayton Road Ottawa IL 61350 USA Phone 815 433 5100 General Fax 815 433 5105 Website www bb elec com European Headquarters B amp B Electronics Westlink Commercial Park Oranmore Co Galway Ireland Phone 353 91 792444 Fax 353 91 792445 Website www bb europe com 2010 B amp B Electronics Revised October 2010 Document Number 3PCI 4310m CAUTION This is an Electrostatic Sensitive Device Use ESD precautions for safe handling Before removing the card from the anti static protective packaging e Discharge any static electricity buildup on your body by touching a large grounded metal surface or the metal chassis on equipment connected to earth ground by a 3 wire power cord Use of a grounding wrist strap is recommended e Avoid touching the gold connectors or other parts on the card except when necessary to set the configuration DIP switches e Remove AC power from the computer before inserting the card 9 2010 B amp B Electronics No part of this publication may be reproduced or transmitted in any form or by any means electronic or2. H Driver Cache 5 perm2 inf BKB Setup Inform Fonts perm2 PNF 12KB Precompiled Help 5 phil vid in 5 Setup Inform X int phillvidPNF 11KB Precompiled H E Installer 5 pinball inf 4KB Setup Inform 28 41 ninhall PNF 12 KR 4 45 Figure 10 Finding the INF files Windows Explorer Setup Information Size 4 45 KB 5 2 find these files may need to set your Views under My Computer to show all files and folders if the INF directory and inf files are not visible 26 Chapter 6 Document Number 3PCI 4310m Removing Drivers Ports and Cards Folder Options 21x General View File Types Offline Files Folder views You can set all of your folders to the same view Reset All Folders Advanced settings Files and Folders Display compressed files and folders with alternate color Display the full path in the address bar Display the full path in title bar Hidden files and folders Do not show hidden files and folders Show hidden files and folders Hide file extensions for known file types 0 Hide protected operating system files Recommended Launch folder windows in a separate process Remember each folder s view settings Show My Documents on the Desktop gt Restore Defaults Cancel Apply Figure 11 Setting the Folder Options to Display Hidden
3. Switch 1 I TX LESEN so Swich 2 RX On If Rx SD RS 422 Mode Tx On sp on RX SD 4 wire RS 485 Mode TX On TX SD 65 RX On 2 wire RS 485 Mode Figure 6 RS 422 485 only DIP Switch Settings 8 Chapter 2 Document Number 3PCI 4310m Serial Card Setup DIP Switch 1 RS 422 485 only The top DIP switch 1 configures the port for RS 485 or RS 422 operation For RS 422 operation which uses two wire pairs and sends point to point or point to multipoints the transmitter can be enabled all the time Placing the middle DIP switch in the TX ON position accomplishes this For RS 485 operation the middle DIP switch is placed in the TX SD position In this position the transmitter is only enabled when data is being sent The transmitter is tri stated when not sending data allowing other transmitters on the communications line to transmit without interference DIP Switch 2 RS 422 485 only The bottom DIP switch 2 configures the port for half duplex two wire RS 485 operation or full duplex four wire RS 422 RS 485 operation Placing the bottom DIP Switch in the RX ON position configures the port for four wire operation In this mode the port s receiver is continuously enabled allowing it to receive all data on the communications line Since the port s transmitter sends data on the other wire pair the port does not receive its own transmissions P
4. eese eene tne neret 6 APPENDIX B CONNECTOR PINOUTS ccssssssscsssescesssscscsssccccssssccsssssccessnee 1 RS 232 PINOUTS rete etre eet ttd e E ON ETE Ree e 1 R S 422 485 PINGUTS ite cte oett 2 APPENDIX C TROUBLESHOOTING WITH COMTEST 5 COMTEST FEATURES 5 INSTALLING COMTES T 5 LOOPBACK TESTING WITH COMTEST 6 iv Table of Contents Document Number 3PCI 4310m General Information Chapter 1 General Information Introduction Miport PCI serial interface cards allow you to add RS 232 RS 422 and RS 485 interfaces to Windows based computers equipped with a PCI bus Depending on your choice of card one two or four optically isolated serial ports or two four or eight non isolated serial ports can be added Mlport PCI serial cards are Plug and Play compatible which allows the Windows Operating System and driver to set the addresses and IRQ used by the card Figure 1 3PCIOU2 Optically Isolated Two Port PCI Serial Interface Card Features Optically isolated or non isolated models available Isolated models available in 1 2 or 4 ports Non isolated models available in 2 4 or 8 ports e 4and8 port models include fanout cables e Plug amp Play compatible Windows sets addresses and IRQ used 5 volt and 3 3 volt PCI bus compatible PCI X compatible Conform to the PCI V2 3 Universal PCI specification
5. Mlport Non Isolated PCI Cards Document Number 3PCI 4310m Chapter 1 3 General Information Specifications OS Supported Windows XP Windows 2008 Server 32 64 bit Windows Vista 32 64 bit Windows 7 32 64 bit Linux Kernel 2 6 x is also supported in the following distributions Ubuntu 10 04 Desktop Edition 32 64 bit and Ubuntu Server Edition 32 64 bit Bus PCI bus 33MHz 32 bit PCI Bus specification Slot Requires one PCI slot 3 3V or 5V signaling Baud Rates Maximum Up to 460 8 kbps RS 232 422 485 Typical 75 110 134 150 300 600 1200 1800 2400 4800 7200 9600 14 4k 19 2k 38 4k 57 6k 115 2k 230 4k 460 8k UARTs XR17D15x 16C550 compatible with 64 byte FIFO buffers Character Length 5 6 7 or 8 bits Parity Even odd none space or mark Stop Bits 1 1 5 2 Optical Isolation 2000 VDC minimum on all lines SPCIOU1 Ports are isolated from the PC power and ground as well as other ports on 3PCIOU2 the same card 3PCIOU4 only Connectors 3PCIOU1 1 DB 9 male 3PCIOU2 2 DB 9 male 3PCIOU4 2 DB 9 male RS 232 422 485 ports 2 DB 9 male via ribbon cable on 2 expansion slot bracket RS 422 485 ports 3PCIU2 2 DB 9 male 3PCIU4 1 DB 37 female with DB 37 to 4 x DB 9 male cable 3PCIU8 1 DB 78 female with DB 78 to 8 x DB 9 male cable 4 x RS 232 422 485 and 4 x RS 232 Data Signals RS 232 TD RD RTS CTS DTR DSR DCD RI and GND TD RD RTS CTS GN
6. Select the desired baud rate parity data bits stop bits Defaults are common settings Type characters They will appear in the upper window If you are performing a loopback test you should see the characters appear in the lower window as they are received On the Option menu click DTR to assert or de assert the DTR hardware handshake line The DTR indicator at the bottom of the window will be red when asserted If DTR is looped back to DSR and DCD their indicators should also be red On the Option menu click RTS to assert or de assert the RTS hardware handshake line The RTS indicator at the bottom of the window will be red when asserted If RTS is looped back to CTS the CTS indicator should be red When testing is completed close the program Document Number 3PCI 4310m Appendix D D 1
7. Ton so switch 2 RX On RX SD RS 422 Mode TX On x sp hz RX On RX SD 4 wire RS 485 Mode TX On TX SD i On 50 2 wire RS 485 Mode Figure 26 RS 422 485 only DIP Switch Settings DIP Switch 1 RS 422 485 only The top DIP switch 1 configures the port for RS 485 or RS 422 operation For RS 422 operation which uses two wire pairs and sends point to point or point to multipoints the transmitter can be enabled all the time Placing the middle DIP switch in the TX ON position accomplishes this For RS 485 operation the middle DIP switch is placed in the TX SD position In this position the transmitter is only enabled when data is being sent The transmitter is tri Document Number 3PCI 4310m Appendix A A l DIP Switch Mode Settings stated when not sending data allowing other transmitters on the communications line to transmit without interference DIP Switch 2 RS 422 485 only The bottom DIP switch 2 configures the port for half duplex two wire RS 485 operation or full duplex four wire RS 422 RS 485 operation Placing the bottom DIP Switch in the RX ON position configures the port for four wire operation In this mode the port s receiver is continuously enabled allowing it to receive all data on the communications line Since the port s transmitter sends data on the other wire pair the port does not receive its own transmissi
8. Before removing the card from the anti static protective packaging Discharge any static electricity buildup on your body by touching a large grounded metal surface or the metal chassis on equipment connected to earth ground by a 3 wire power cord Use of a grounding wrist strap is recommended Avoid touching the gold connectors or other parts on the card except when necessary to set the configuration DIP switches e Hemove AC power from the computer before inserting the card Initial Configuration The ports in your Mlport card are normally pre configured for RS 232 operation To ensure the card is configured correctly for your desired operating mode you will have to check and or set the three operating mode DIP switches on the card If you are configuring for RS 485 Mode you also may have to set up the RTS Control parameter in the device driver Note R efer to Chapter 4 for information on Setting Driver Options Document Number 3PCI 4310m Chapter 2 5 Serial Card Setup Overview of Operational Modes RS 232 Mode In RS 232 Mode Mlport serial ports function as buffered standard PC serial ports and operate as DTEs Data Terminal Equipment RS 232 interfaces are commonly used for communications with modems serial printers and computer controlled devices such as security equipment bar code scanners and point of sale devices For most Mlport models RS 232 Mode supports eight single ended signal lines and sign
9. mechanical including photography recording or any information storage and retrieval system without written consent Information in this manual is subject to change without notice and does not represent a commitment on the part of B amp B Electronics B amp B Electronics shall not be liable for incidental or consequential damages resulting from the furnishing performance or use of this manual All brand names used in this manual are the registered trademarks of their respective owners The use of trademarks or other designations in this publication is for reference purposes only and does not constitute an endorsement by the trademark holder Document Number 3PCI 4310m Table of Contents i Table of Contents TABLE OF CONTENTS 4 creen eee ee eene eee tone eene eese tna eee eee eese enne eese en ee etta aa II CHAPTER 1 GENERAL INFORMATION eee eee eese eno 1 INTRODUCGCTION 1 lg uui je 1 MIPORT MODELS AND 2 SPECIFICATIONS 4 CHAPTER 2 SERIAL CARD SETUD e sese ee tn sesta 5 PRESSETUP STEPS RIVE VIRI NIV 5 REPE 5 Initial CONPiQUP AON 5 OVERVIEW OF OPERATIONAL 6 232 MO 6 R8 422 Ta basal 6
10. G Common Isolated GND Card 2 Wire RS 485 Set R5485 Connections Figure 20 2 Wire RS 485 Connections 2 Wire RS 485 Mode Your cables must bridge pins 1 amp 3 and pins 2 amp 9 in order to receive and transmit Connect from Pin 2 to Data B of your devices and from pin 3 to Data A of your devices Make sure your DIP switches are set and that the driver Setting for RTS Control is RS 485 Mode in the Device Manager Port Settings Advanced Note that the EIA RS 422 Specification labels data lines with an A and B designator Some RS 422 or RS 485 equipment uses a and designator In most cases the A line is the equivalent of the line and the B line is the equivalent of the line Some device manufacturers may not follow the standard designation for RS 422 or RS 36 Chapter 8 Document Number 3PCI 4310m RS 422 485 Connections Operation 485 using the A connection for and the B for In such cases reversing the line pair permits operation 4 Wire RS 422 and RS 485 Connections RS 422 Point to Point Connection For RS 422 point to point communications connect the Mlport card and to one RS 422 device only 1 Connect the TD B pin 2 on the computer to RD B on the device 2 Connect the TD A pin 3 on the computer to RD A on the device 3 Connect the RD B pin 9 on the computer to TD B on the device 4 Connect the RD A 1 on the computer to TD A o
11. username computer sudo etc rc Ml port Document Number 3PCI 4310m Chapter 5 23 Installing Linux Driver Software Searching for Mlport driver n LAG he Mi port driver was found The driver is loaded aking special nodes for Mlport aking dev ttyMO dev cum0 aking dev ttyMl dev cuml aking dev ttyM2 dev cum aking dev ttyM3 dev cum3 aking dev ttyM4 dev cum4 aking dev ttyM5 dev cumb aking dev ttyM6 dev cum6 aking dev ttyM7 dev cum7 16 Verify that the device driver is running If the output is similar to what is shown below then the Mlport driver is running If the output is blank then the Mlport driver is not running username computer dmesg grep B amp B Ele nics PCI MI 278281182 rt seria I a Miport 0000 07 05 05 0 PCI 5 7 el low 17 Use a serial communications program to verify that the driver works The serial ports will be dev ttyMO through dev ttyM7 18 If the driver works correctly modify etc rc local to automatically load the driver when the operating system starts username computer sudo vim etc rc local Add the following code to the file before the exit 0 statement if f Jetc rc Ml port then exec etc rc Ml example of the code to add to etc rc local is in the Mlport driver folder in the file rc local 19 Restart the computer and then test serial
12. 7 E E 6 OPERATING MODE SELECTION 0 0 cccsvsecvevsvevevecsvecsenssvtveveesvsctssvsvtesvscvevsesssssseeveesves 7 Setting the DIP Switches on RS 232 422 485 Ports see 7 Setting the DIP Switches on RS 422 485 Only Ports sse 8 INSTALLING THE SERIAL E CERE 10 CHAPTER 3 DRIVER SOFTWARE 11 INSTALLING WINDOWS 7 DRIVER 11 INSTALLING WINDOWS XP DRIVER SOFTWARE eene nene 11 Pre Installation e tet eee 12 Using the Found New Hardware Wizard eee 12 PCI Card Software Installation eese nennen 12 CHAPTER 4 SETTING DRIVER OPTIONS eee eee eee ee ee en eee ene e eee enaeee 14 CONFIGURING PORT SETTINGS seen ee hehehe ene 14 SETTING THE FIFO 15 SETTING THE RTS CONTROL 15 SETTING THE HARDWARE HANDSHAKING LEVEL 16 CHANGING THE COM PORT NAME NUMBER s000ssseeeseseseseseseseseseseseseseeeeeseeeeees 16 CHAPTER 5 INSTALLING LINUX DRIVER SOFTWARE 18 INSTALLING MIPORT DRIVER ON UBUNT
13. RS 232 RS 422 RS 485 interfaces 2 wire or 4 wire RS 485 operation half or full duplex e Automatic Send Data Control for RS 485 operation Buffered high speed XR17D15x PCI Bus UARTs 16C550 compatible with 64 byte FIFOs for input output with programmable trigger thresholds e Advanced driver function for COM port rename Refer to Chapter 4 Supports baud rates up to 460 8 kbps e Windows XP Windows 2008 Server 32 64 bit Windows Vista 32 64 bit Windows 7 32 64 bit Linux Kernel 2 6 x is also supported in the following distributions Ubuntu 10 04 Desktop Edition 32 64 bit Ubuntu 10 04 Server Edition 32 64 bit Document Number 3PCI 4310m Chapter 1 1 General Information Miport Models and Features Model Ports Interface Connectors Number 3PCIOU1 1 RS 232 422 485 DB 9 male b 3PCIOU2 2 RS 232 422 485 DB 9 male 3PCIOU4 4 2 RS 232 422 485 ports 2 RS 422 485 ports 2 x DB 9 male 2 x DB 9 male use 2 expansion slot Figure 2 Mlport Optically Isolated PCI Cards Chapter 1 Document Number 3PCI 4310m General Information Model Ports Interface Connectors Number 3PCIU2 2 RS 232 422 485 2 x DB 9 male 3PCIU4 4 RS 232 422 485 DB 37 female plus DB 37 to 4x DB 9 male cable 3PCIU8 8 4 RS 232 422 485 ports DB 78 female 4 RS 232 ports plus DB 78 to 8x DB 9 male cable Figure
14. Figure 23 RS 232 Loopback w Handshaking Connections 2 For RS 422 or 4 wire RS 485 connect the TD A to RD A and the TD B to RD B Then use the ComTest program to send characters and observe the characters being received Male 1 3 Pin 1 Figure 24 RS 232 Loopback Connector A 2 Appendix A Document Number 3PCI 4310m DIP Switch Mode Settings 3 check 2 wire RS 485 RS 422 or 4 wire RS 485 Loopback Connections you must either enable the receiver by moving the receive jumper to RX ENABLE mode or use one port to transmit to another 2 wire RS 485 port or converter by cross connecting and loading ComTest twice one copy for each port Characters typed in one copy of ComTest will appear in the receive window of the other Note that software must ignore the RS 232 handshaking lines in RS 422 RS485 mode the input lines CTS DSR DCD RI are not pulled high 4 Some manufacturers label their data connections for A and B reverse of the standard for RS 422 or RS 485 so that the A line is and B line is inverted following the IC standard In such a case just swap the wires and try it No damage occurs in the RS 485 mode just no devices will respond The EIA standard for signal labels defines the B line as positive relative to A during the MARK state 5 Try another software package for troubleshooting Some applications try to bypass the Windows drivers and access the hardware directly 6 Check the B amp
15. RS 422 485 pinouts are non standard Document Number 3PCI 4310m Appendix A A l DIP Switch Mode Settings 2 sure you have RTS Control set to the correct mode Normal for RS 232 RS 485 Mode for RS 485 RS 422 mode works in either setting if the mode jumpers are set correctly Checking the Mlport Card Using ComTest and a loopback connection you can check the operation of your Mlport card separate from the rest of your communications system Note Refer to Appendix C for information on how to install and use ComTest 1 A loopback connection for RS 232 connects the Transmit output to the Receive input pins 2 amp 3 on the DB 9 connector Use connections below to check all RS 232 Loopback Connections DTE Computer Loopback DBS Conrections Pint 089 RS 232 Signal Names 1 Carrier Detector DCE 2 Receive Data Rx 3 Transmit Data Tx 4 DTE Ready Data Terminal Ready 5 Signal Ground Common SG 6 DCE Ready Data Set Ready DSR 7 Request to Send RTS 8 Clear to Send CTS 9 Ring Indicator RI Soldered to DBS Metal Shield Pin DBS RS 232SignalNames 1 Carrier Detector DCE 2 Receive Data 0 3 Transmit Dato 5 Signal GroundiCommon SG 6_DCE Ready Data Set Ready DSR DT Requestto Send RTS 8 Clearto Send 9 Rigindcetor R NN Note amp RI are inputs from Modem device use Connection
16. Receive buffer Low 1 1 High 64 14 oT CTO Transmit buffer Low 1 High 64 1 RTS Control C Normal RS 485 Mode Direction control delay bit times 10 Hardware handshaking hysteris level characters Low 0 High 52 0 Enable detection of external Plug and Play COM devices Port Name COM3 z Figure 17 Setting RTS Control for RS 485 The RS 485 mode is set by configuring the DIP switch setting on the Mlport card and by selecting RS 485 Mode under RTS Control in the Advanced COM port settings dialog box Note For more information on COM port settings refer to Chapter 2 and Chapter 5 RS 485 Termination Resistors In some applications termination resistors must be connected across the communications line to ensure reliable communications Termination resistors absorb signal reflections that can occur when a data signal reaches the end of a transmission line and encounters an impedance higher than that of the transmission line itself Typically termination resistors are not required for communications links that operate at less that 19 2 kbps At higher bit rates a termination resistor of 120 ohms may be required Termination resistors should be connected across the communications line at the extreme opposite ends of the network Through hole pads are provided on Mlport cards to install termination resistors When adding termination resistors
17. after its receive buffer has reached the point at which it asks the computer to transfer the data to program memory When this point is reached the UART de asserts the RTS hardware handshake line which is connected to the remote UART s CTS line stopping the remote device from sending data until its CTS line is re asserted This will occur when the local receive FIFO buffer has been cleared The default value for this parameter is 0 Typically this value will not need to be changed Changing the COM Port Name Number 1 16 To change the COM port number assigned to the port click the COM Port Name arrow and select the new COM Port Name from the list Available names for COM numbers are shown Select a new number from those not in use COM numbers from COM1 to COM256 may be available COM numbers in use may be used by motherboard ports modems virtual COM ports for network serial server devices or FAX modems Formerly installed USB to serial adaptors PCI cards or other hardware may have reserved a COM number The device may need to be added back to the System then the software removed Advanced editing of the registry may required to clean up the problem Special permissions are required with 2000 or XP Chapter 4 Document Number 3PCI 4310m Setting Driver Options Advanced Settings for zm fin use CN OF Figure 9 Changing the COM Port Name Number 2 After selecting a new COM name number Cl
18. installation of the software for the PCI card click Install the software automatically Click Next Windows will find the appropriate files on the CD then display a dialog box concerning Window Logo testing for Vista This feature of Vista simply indicates that these drivers have not yet undergone the Microsoft testing procedure required to use the Windows Vista Logo on the packaging Diver compatibility is not affected 8 Click Continue Anyway A dialog box will appear indicating the software installation is proceeding 9 When the Completing the Found New Hardware Wizard dialog appears click Finish Port Driver Installation The Welcome to the Found New Hardware Wizard will appear again indicating it has detected a port on the PCI card Repeat the steps above to install the port driver software If the cared you are installing has more than one port Windows Vista will find each port in sequence and re launch the Found New Hardware Wizard for each port Repeat the previous steps for each port Checking the Driver Installation 12 Chapter 3 Document Number 3PCI 4310m Driver Software Installation You may want to check to verify that the new B amp B COM ports are now available 1 From the Widows Desktop click Start Control Panel System and Maintenance Device Manager 2 In the Device Manager click Multi port serial adapters All serial adapter cards should appear in the list Additional information about t
19. the value of biasing resistors must be appropriately sized as well RS 485 Network Biasing Unlike RS 422 where the transmitter holds the line high and the TDA line low in the idle or Mark state when not transmitting data in a RS 485 network the transmitter tri states to a high impedance state when not sending data 34 Chapter 8 Document Number 3PCI 4310m RS 422 485 Connections Operation It is important to maintain the Mark state for all RS 485 receivers when no data is being sent Maintaining the line in the Mark state minimizes noise that would otherwise be picked up by a high impedance line It also provides the starting point so that when a transmitter begins to send data the leading edge of the start bit can transition from the Mark to Space state To maintain the Mark state biasing is required Biasing is the technique of placing pull up to positive voltage and pull down to ground resistors on the line so that all RDA receiver inputs remain at least 200 mV more negative than inputs Mark state This ensures the inputs will remain above the receiver threshold of 200mV for all devices on that section of the network If the biasing is not maintained the first data bit of a signal may not be detected and one or more devices may not respond to commands or may operate intermittently Figure 18 RS 485 Biasing Resistors RS 485 receivers come pre biased from the factor
20. 2 mem j Beceive buffer Low 1 0 High 64 14 Cancel Default Transmit buffer Low 1 0 High 64 1 RTS Control Normal 5 485 Mode 10 Hardware handshaking hysteresis level Low 0 0 High 52 0 Enable detection of external Plug and Play COM devices COM Port Name i Figure 8 Advanced Port Settings Setting the FIFO Buffers Miport cards use UARTS that contain 64 byte transmit and receive FIFO first in first out buffer registers The transmit buffer holds the data to be sent the receive buffer holds the data received The Transmit buffer Low parameter in the Advanced Port Settings dialog allows you to set the minimum value at which the UART will request more data from the computer As the Mlport card is transmitting data the number of bytes left the transmit buffer will decrease When the buffer reaches the value set the UART will request more data from program memory This is intended to optimize the throughput of the data Typically this parameter is set at zero and usually does not have to be changed The Receive buffer Low parameter in the Advance Port Settings dialog allows you to set the value at which the UART will request that the computer read the data that has been received As the Mlport card is receiving data the contents of the receive buffer increases when it reaches the value set the UART will request that the computer transfer the conte
21. 8 Windows 3 Drivers Mlport Eg Programs x aie 5 Control Panel Printers g Scheduled Tasks Network Neighborhood Recycle Bin v gt object s 552KB Disk free space 0 bytes 4 Figure 32 Loading ComTest 2 RunSetup exe to install ComTest on your program menu under B amp B Electronics Loopback Testing with ComTest To familiarize yourself with the operation of ComTest connect a loopback plug to a COM port on your PC and perform the following procedure 1 Make any required loopback connections on the port to be tested RS 232 Loopback Connections DTE Computer Loopback DBS int 089 RS 232 Signal Names 1 Carrier Detector DCE 2 Receive Data Rx 3 Transmit Data Tx 4 Ready Data Terminal Ready DTR 5 Signal Ground Common SG 6 DCE Ready Data Set Ready DSR 7 Request to Send RTS 8 Clear to Send CTS 9 Ring Indicator RT Soldered to DBS Metal Shield Note CD amp RI are inputs from Modem device use DTR Connection D 2 Appendix D Document Number 3PCI 4310m Figure 33 RS 232 Loopback w Handshaking Connections From the Windows Desktop click Start Programs B amp B Electronics ComTest ComrTest ComTest will start and then open the Select Port dialog box Select the COM port you want to access or test The drop down box shows available ports that are not currently in use Click OK The Configure Port dialog will appear
22. B website for available FAQs or troubleshooting hints 7 Contact B amp B Electronics Technical Support for troubleshooting assistance Document Number 3PCI 4310m Appendix A 1 DIP Switch Mode Settings Appendix A DIP Switch Mode Settings Setting the DIP Switches on RS 232 422 485 Ports Set the DIP switches to configure the desired operating mode as follows Switch 1 TX On ESSE switch 3 RX On Rx sp RS 232 Mode 4221485 232 TX On sp On 50 RS 422 Mode 4221485 232 TX On sp On Rx SD 4 wire RS 485 Mode 422 485 232 TX On sp RX On Rx sp 2 wire RS 485 Mode Figure 25 RS 232 422 485 DIP Switch Settings DIP Switch 1 RS 232 422 485 ports The top DIP switch 1 configures the port for RS 232 or RS 422 485 operation This Switch is the only one that is required to be set for RS 232 operation The positions of Switches 2 and 3 do not matter when switch 1 is set for RS 232 operation DIP Switch 2 RS 232 422 485 ports The middle DIP switch 2 configures the port for RS 485 or RS 422 operation For RS 422 operation which uses two wire pairs and sends point to point or point to multipoints the transmitter can be enabled all the time Placing the middle DIP switch in the TX ON position accomplishes this For RS 485 operation the midd
23. D only on 3PCIOU4 RS 422 TD A TD B RD A RD B and GND RS 485 Data A Data B and GND Operating temperature range 0 to 50 C minimum Operating humidity 5 to 95 non condensing 4 8 x 3 8 in 12 2 x 9 6 card edge Mounting bracket 1 2 x 12 1 x 0 9 cm Software Driver CD ROM disc for Windows 98 ME NT 4 0 2000 2003 Server XP Vista and Linux 2 4 Manual Instruction Manual Contained on CD ROM Figure 4 Miport Serial Card Specifications 4 Chapter 1 Document Number 3PCI 4310m Serial Card Setup Chapter 2 Serial Card Setup The following Serial Card Setup section applies to the following PCI cards 3PCIOU1 port optically isolated PCI serial card 3PCIOU2 two port optically isolated PCI serial card 3PCIOU4 four port optically isolated PCI serial card 3PCIU2 two non isolated PCI serial card 3PCIU4 four port non isolated PCI serial card 3PCIU8 eight non isolated PCI serial card Any deviations from the procedure for specific models are noted Pre Setup Steps Your serial card has been tested for proper operation before packaging and shipping It should be in perfect mechanical and electrical condition upon receipt ESD Precautions To ensure a successful installation and setup it is important that you follow the standard ESD precautions outlined below CAUTION This is an Electrostatic Sensitive Device Use ESD precautions for safe handling
24. Files 3 Delete the oemx inf and oemx pnf files found in Step 2 CAUTION Be careful to delete only the files associated with the PCI card you are trying to uninstall Document Number 3PCI 4310m Chapter 6 27 RS 232 Connections Operation Chapter 7 RS 232 Connections Operation RS 232 Mode In RS 232 Mode Mlport serial ports function as buffered standard PC serial ports and operate as DTEs Data Terminal Equipment RS 232 interfaces are commonly used for communications with modems serial printers and computer controlled devices such as security equipment bar code scanners and point of sale devices RS 232 Signal Designations and DB 9 Pinout RS 232 Mode supports eight single ended signal lines and signal ground The DB 9 male connector is configured as a standard RS 232 DTE serial port The table below shows the signal names and pin numbers RS 232 Signal RS 232 Signal Name Description DTE Pin Dep DataCarrer Detect 1 RD 2 TransmitData Output 3 Data Terminal Ready Output 4 Signal Ground Request to Send Output Clear to Send 8 Ring Indicator o Figure 12 RS 232 Signal Designations and DB 9 Pinout GND Data Set Ready dpt 6 Note Refer to Appendix for additional cable configurations and pinouts 28 Chapter 7 Document Number 3PCI 4310m RS 232 Connecti
25. IP switch in the TX ON position accomplishes this For RS 485 operation the middle DIP switch is placed in the TX SD position In this position the transmitter is only enabled when data is being sent The transmitter is tri stated when not sending data allowing other transmitters on the communications line to transmit without interference DIP Switch 3 RS 232 422 485 ports The bottom DIP switch 3 configures the port for half duplex two wire RS 485 operation or full duplex four wire RS 422 RS 485 operation Placing the bottom DIP Switch in the RX ON position configures the port for four wire operation In this mode the receiver is continuously enabled allowing it to receive all data on the communications line Since the transmitter sends data on the other wire pair the port does not receive its own transmissions Placing the bottom DIP switch in the RX SD position configures the port for two wire operation In this mode the transmitter and receiver are connected to the same wire pair The receiver is disabled when its transmitter is sending preventing the port from receiving its own data Setting the DIP Switches on RS 422 485 Only Ports The 3PCIOUA Miport card provides a combination of RS 232 422 485 and RS 422 485 only ports Ports that do not include RS 232 operation use double DIP switches rather than triple DIP switches These DIP switches operate the same as the two bottom DIP Switches in the RS232 422 485 ports
26. RS 485 NETWORK BIASING eee nennen hehe nennen eere eere eere eere enne eene 34 2 WIRE RS 485 CONNECTIONS 36 2 Wire R 485 Mode t cote dades 36 4 WIRE RS 422 AND RS 485 CONNECTIONS eee eene ementi 37 RS 422 Point to Point Connection esses eee eee eene 37 RS 422 Point to Multipoint Connection esee nennen 37 4 Wire RS 455 Connection iet trien cue tese ea oap noe 38 CHAPTER 9 TROUBLESHOOTING MIPORT 1 STARTING DP eue e ENG ED Ee 1 CHECKING CONNECTIONS 1 R8 232 422 485 Oper tion T a pea CY Ae 1 R 232 Oper tioi ie at re PEU TR HEISE SER EeS SE 1 R8 422 485 Operdtion e da 1 CHECKING THE MIPORT 2 APPENDIX A DIP SWITCH MODE SETTINGS eee eene ee eene eene 4 SETTING THE DIP SWITCHES ON RS 232 422 485 5 4 DIP Switch 1 RS 232 422 485 ports ecce eene eere 4 DIP Switch 2 RS 232 422 485 ports eese 4 DIP Switch 3 RS 232 422 485 5 SETTING THE DIP SWITCHES ON RS 422 485 ONLY 5 Document Number 3PCI 4310m Table of Contents iii DIP Switch 1 RS 422 485 5 DIP Switch 2 RS 422 485 only
27. Restart the computer and then test serial communications again with gtkterm 20 Chapter 5 Document Number 3PCI 4310m Installing Linux Driver Software Ubuntu 10 04 Server 32 bit and 64 bit 1 Determine which version of GCC built the current Linux kernel username computer cat proc version Linux version 2 6 32 21 server buildd yellow gcc version 4 4 3 Ubuntu 4 4 3 4ubuntu5 32 Ubuntu SMP Fri Apr 16 09 17 34 UTC 2010 The current Linux kernel was built using GCC v4 4 3 2 Install the version of GCC that built the current Linux kernel username computer sudo apt get update Fetched 12 0MB in 50s 237kB s Reading package lists Done username computer sudo apt get install gcc 4 4 gcc Reading package lists Done Building dependency tree Reading state information Done The following extra packages will be installed binutils gcc 4 4 libc bin libc dev bin libc6 libc6 dev libgompl linux libc dev manpages dev After this operation 35 3MB of additional disk space will be used Do you want to continue Y n y Setting up binutils 2 20 1 3ubuntu7 Setting up libgompl 4 4 3 4ubuntu5 Setting up gcc 4 4 4 4 3 4ubuntu5 Sieitrt up Ars ununmi ua Setting up libcdev bin 2 11 1 0ubuntu7 5 US MI OIG d e eue Setting up libc6 dev 2 11 1 0ubuntu7 5 3 Get the version of the Linux kernel username computer uname 2 6 32 21 server 4 Install the Linu
28. U 10 04 18 CHAPTER 6 REMOVING DRIVERS PORTS AND 5 25 WINDOWS 25 ii Table of Contents Document Number 3PCI 4310m Uninstalling the MIport 25 Uninstalling the COM ports eese eene nnne nennen entente 25 Removing INF and PNF Driver Files esses eene nennen 25 CHAPTER 7 RS 232 CONNECTIONS OPERATION ee esee eee ee eee 28 IE PA api 28 RS 232 SIGNAL DESIGNATIONS AND DB 9 PINOUT 28 RS 232 Signal Designations cesses ene nenne nennen nenne 29 IDLE AND fasts ak heat 29 RS 232 SIGNAL LEVELS 29 HANDSHAKING 30 RTS CONTROL IN RS 232 MODE 30 CHAPTER 8 RS 422 485 CONNECTIONS OPERATION 31 RS 422 485 MODE ee Peu ee E e Ede eiue 31 RS 422 485 SIGNAL DESIGNATIONS AND DB 9 PINOUT 31 RS 422 485 Signal Designations eese eene nenne 31 RS 422 485 DIFFERENTIAL SIGNALS cese eene nennen nene eee n ene ne nene 32 RS 422 OPERATION 32 RS422 LAMUGHONS cese aede 33 RS 485 OPERATION 33 Send Data Control 3 33 RS 485 TERMINATION RESISTORS eese ne nene Henne nennen eere nnne nnne 34
29. a Mlport card has an associated DIP Switch to set its operating mode The port number associated with the DIP switch is clearly silk screened on the printed circuit board Note Refer to Appendix x for DIP switch locations on various MIport cards Setting the DIP Switches on RS 232 422 485 Ports Set the DIP switches to configure the desired operating mode as follows Switch 1 4221485 222 switen 2 TX ILS 5 switen RX Rx SD RS 232 Mode 4221485 232 TX On 999 x sp Rx 5D RS 422 Mode 422 485 232 TX On rx sp RX on Rx sp 4 wire RS 485 Mode 422 485 232 TX On sp Rx on 2 RS 485 Mode Figure 5 RS 232 422 485 DIP Switch Settings DIP Switch 1 RS 232 422 485 ports The top DIP switch 1 configures the port for RS 232 or RS 422 485 operation This switch is the only one that is required to be set for RS 232 operation The positions of switches 2 and 3 do not matter when switch 1 is set for RS 232 operation DIP Switch 2 RS 232 422 485 ports The middle DIP switch 2 configures the port for RS 485 or RS 422 operation For RS 422 operation which uses two wire pairs and sends point to point or point to Document Number 3PCI 4310m Chapter 2 7 Serial Card Setup multipoints the transmitter can be enabled all the time Placing the middle D
30. a crossover often called a null modem cable is needed to route the outputs of one to the inputs of the other This type of cable is needed to interconnect two computers with RS 232 Note Refer to Appendix B for straight through and null modem cable diagrams and pinouts RS 232 Signal Levels RS 232 signal lines are referenced to ground and each signal can alternate above and below ground The RS 232 standard specifies output voltages must be no less than 5 volts and no greater than 25 volts to represent a Space on a transmit line or an asserted handshake line Output voltages must be between 5 volts and 25 volts to represent a Mark on a transmit line or an de asserted handshake line Document Number 3PCI 4310m Chapter 7 29 RS 232 Connections Operation The standard specifies that RS 232 inputs accept voltage levels between 3 volts and 25 volts for a Mark asserted handshake and between 3 volts to 25 volts for a Space de asserted handshake Typically RS 232 voltages will be between 3 to 11V and to 11V Handshaking To control the flow of data between two devices some software uses hardware handshaking RS 232 devices which require hardware handshaking require connection of RTS CTS and or DTR DSR lines in order to operate properly Programs for RS 232 may chose to use only the RS 232 TD and RD data lines and ignore hardware handshaking inputs set up as None in the port configuration I
31. al ground GND including transmit TD receive RD and six hardware handshake lines DTR DSR RTS CTS DCD RI The only exception to this is the MIport Model 3PCIOU4 card which supports TD RD RTS CTS and GND RS 422 Mode In RS 422 mode Mlport serial ports provide two sets of differential signal pairs TD and RD and signal ground for each port The RS 422 standard uses balanced differential drivers and receivers for each signal This facilitates greater communication distances than unbalanced systems such as RS 232 In RS 422 mode the transmitter and receiver are always enabled TX ON RX ON RS 422 operation is suitable for interconnecting a computer and one device for full duplex point to point bi directional communication or a computer and several devices for unidirectional point to multipoints communication RS 422 interfaces are commonly used for video editing control camera control electronic signage television studio satellite dish control performance lighting and audio equipment control RS 485 Mode In RS 485 Mode Mlport cards provide RS 485 interfaces which operate with the same signals and signal levels as RS 422 RS 485 interfaces differ from RS 422 in that they allow multiple devices to share the same communication link using half duplex 2 wire or full duplex 4 wire connections Since it is possible to have more than one transmitter connected to the media transmitters must be enabled only while sending data
32. all the software for each port on the card There are several possible methods for installing the software The procedure outlined here is recommended for most situations Note f at some point in the future you want to update these drivers remove the old drivers before installing the new version Refer to Chapter 6 for driver removal procedures Document Number 3PCI 4310m Chapter 3 11 Driver Software Installation Pre Installation Steps 1 Configure the port s on the card for the desired mode RS 232 RS 422 or RS 485 using the three DIP switches on the card 2 configuring for RS 422 or RS 485 Modes and bias or termination resistors are needed add them at this time Note Refer to Chapter 2 of information on DIP switch settings and bias termination resistors Install the card in the slot Use appropriate ESD handling precautions 4 Power up the computer 5 Insert your driver disc in the CD ROM drive Using the Found New Hardware Wizard Windows will detect the PCI card and start the Found New Hardware Wizard to begin the driver installation Driver software on CD ROM is provided with your Mlport card Do not connect to Windows Update to search for software 6 Select No not at this time and click Next PCI Card Software Installation Once the new hardware has been detected the wizard will proceed to install the software for the card The following dialog box will appear 7 To begin the
33. and tri stated at all other times so other devices can use the wire pair Mlport cards automatically enable the transmitter at the appropriate time using Automatic Send Data Control based on the contents of the output buffer When the buffer has data to send the transmitter is enabled TX SD When all data in the buffer has been sent the transmitter is disabled and tri stated to a high impedance state In half duplex operation the receiver is disabled during transmit RX 5D and enabled when not transmitting In full duplex operation the receiver is always enabled RX ON Since RS 485 transmitters are tri stated when not transmitting the receive inputs must be biased to ensure the media floats in the Mark state so that the first Space state is detected correctly at the start of the next transmission These serial cards incorporate the necessary biasing to accommodate up to 32 standard nodes Typical input resistance Rin for each load is 12kQ Provisions are made for custom biasing and or termination Note For more information on RS 485 Mode refer to Chapter 6 6 Chapter 2 Document Number 3PCI 4310m Serial Card Setup Operating Mode Selection The hardware address and IRQ for the serial card is set by the Windows Operating System using driver information files and the Plug and Play OS The Operating Mode is set using DIP switches Device Manager Driver Settings and by your cable connections and software Each port on
34. cial nodes for Mlport aking dev ttyMO dev cum0 aking dev ttyMI dev cuml aking dev ttyM2 dev cum2 aking dev ttyM3 dev cum3 aking dev ttyM4 dev cum4 aking dev ttyM5 dev cum5 aking dev ttyM6 dev cum6 aking dev ttyM7 dev cum7 10 Verify that the device driver is running If the output is similar to what is shown below then the Mlport driver is running If the output is blank then the Mlport driver is not running Document Number 3PCI 4310m Chapter 5 19 Installing Linux Driver Software username computer dmesg grep om ATS vel low 11 optional If recording was started in Step 2 stop recording The file Mlport script contains all output recorded from the terminal username computer exit exit Script done on Tue 31 Aug 2010 03 58 48 AM CDT 12 Test serial communications using gtkterm Change the serial port under Configration Ports and set the port to dev ttyMO for each serial port increment the number at the end of the name e g dev ttyM1 username computer gtkterm amp 13 If the driver works correctly modify etc rc local to automatically load the driver when the operating system starts username computer sudo gedit etc rc local Add the following code to the file before the exit 0 statement if f etc rc Mlport then exec etc rc Mlport fi An example of the code to add to etc rc local is in the Mlport driver folder in the file rc local 14
35. communications again 24 Chapter 5 Document Number 3PCI 4310m Removing Drivers Ports and Cards Chapter 6 Removing Drivers Ports and Cards Windows 7 Uninstalling the Card 1 In the Device Manager under Multi port serial adapters right click the card to be uninstalled NOTE The card must still be physically installed in the computer otherwise it will not show up in the Device Manager 2 Inthe pop up menu that appears click Uninstall On the Confirm Device Removal dialog that appears click OK 4 After a few seconds the dialog will disappear In the Device Manager the listings for the card under Multi port serial adapters and all associated COM ports under Ports COM amp LPT will be gone 5 Physically remove the Mlport card from the computer Uninstalling the COM ports 1 In the Device Manager under Ports COM amp LPT right click the COM port to be uninstalled 2 Onthe Confirm Device Removal dialog that appears click OK 3 After a few seconds the dialog will disappear In the Device Manager the listings for the port under Ports COM amp LPT will be gone This procedure will not affect other ports or the card itself To uninstall the card and all its ports use the preceding procedure Removing INF and PNF Driver Files 1 Open Windows Explorer as follows From the Windows Desktop click Programs Accessories Windows Explorer 2 Under the Windows directory expan
36. ctors provide reliable communications at much greater distances than RS 232 RS 422 Operation In RS 422 mode the transmitter is enabled TX ENABLE all the time and the receiver is enabled RX ENABLE all the time Typical point to point connections use a transmitter and receiver at each end with two wire pairs connecting them The transmit lines of the device at one end of the link are connected to the matching receive lines of the device at the other end The second device transmit lines are connected to the receive lines of the first Another common connection mode point to multipoints connects the transmit pair from the master device transmitter to the receive lines of many listening slave devices In this scenario the communications is one way None of the listening devices have transmitters connected to reply to the master 32 Chapter 8 Document Number 3PCI 4310m RS 422 485 Connections Operation RS 422 Limitations The limitation of RS 422 operation is that only one transmitter can be connected to a wire pair because the transmitter is active all the time Even when the transmitter is not sending data it will assume the idle or Mark state in which TDA is at OV with respect to ground and TDB line is at about 4 4V with respect to ground If another transmitter output is connected to the same wire pair and attempts to begin sending data by setting the line pair to Space state the first transmitter will hold the oppos
37. d the inf sub directory and find the oemX inf and oemX PNF files where X represents the number of the file The operating system names these files during the installation process To locate the correct INF files search for files in C Windows Inf and its subdirectories for a file named INF that contains the text Disk 6404 There will be two files unless the installation failed then there might only be one file Then the customer can double check that it is in fact a B amp B Electronics file Document Number 3PCI 4310m Chapter 6 25 Removing Drivers Ports and Cards inf File Edit View Favorites Tools Help Back Q Search Folders E4 History Gs pu Folders x 3 6 Local Disk C 9 nv4 PNF 10KB Precompiled oemD inf 4KB Setup Inform H Documents and Settin Program Files 0 10KB Precompiled Recycled oem inf 5KB Setup Inform temp oem1 PNF 11 KB Precompiled 3 WINNT 2 oem inf 5KB Setup Inform C3 addins 5 oem2 PNF 10KB Precompiled AppPatch SEE 5 Setup Inform Config cem3 PNF 11 Precompiled Connection Wizan 7KB Setup Inf CSC 18 optional in etup Inform GB Cursors B optional PNF 20KB Precompiled 5 88 Debug 5 pemcia inf 17KB Setup Inform Downloaded Prog gt pcmcia PNF 39KB Precompiled
38. e 18 Chapter 5 Document Number 3PCI 4310m Installing Linux Driver Software use i LL 6 32 24 generic build Mz home username port 0 0 modu make 1 Entering directory usr s OT de headers 2 6 32 24 generic CC M Lhome username MI port 3 0 0 M Building modules stage 2 MODPOST 1 modules GE home username 3 0 0 port mod LD M home username 3 0 0 port make 1 Leaving directory usr src linux headers 2 6 32 24 generic 7 Determine the present working directory The output may be different than shown below username computer pwd home username port 3 0 0 8 Install the Mlport device driver The part after PWD of the command below should match the output from the command above username computer sudo make install PWD home username 3 0 0 make C username MI port 3 0 0 modules install make 1 Entering directory usr src linux headers 2 6 32 24 generic INSTALL home username Mi port 3 0 0 port ko DEPMOD 2 6 32 24 generic make 1 Leaving directory usr src linux headers 2 6 32 24 generi c cp rc Mlport etc rc Mlport chmod 755 etc rc Ml port 9 Start the Mlport driver username computer sudo etc rc Ml port Searching for driver in The Ml port driver was found The driver is loaded aking spe
39. er 5 Document Number 3PCI 4310m Installing Linux Driver Software 11 Change the current working directory to where the Mlport driver source code is located username computer cd Mlport 3 0 0 12 Compile the Mlport device driver username computer make make 6 32 24 generic build port 3 0 0 modu make 1 Entering directory usr s We llinux headers 2 6 32 24 generic CC M home username Mi 3 0 0 port Building modules stage 2 MODPOST 1 modules GG home username MI 3 0 0 port at 0 LD M home username 3 0 0 port make 1 Leaving directory usr src linux 2 6 32 24 13 Determine the present working directory The output may be different than shown below username computer pwd home username port 3 0 0 14 Install the Mlport device driver The part after PWD of the command below should match the output from the command above username computer sudo make install PWD home username port 3 0 0 make C MATE ene port 3 0 0 modules install make 1 Entering directory usr e ae c linux LE NSTALL home ser name port 3 0 MI port DEPMOD 2 6 32 24 generic make 1 Leaving directory E Mi Tom CS M EDITO TE chmod 755 etc rc port 15 Start the Mlport driver
40. he cards can be obtained by double clicking the name of the card 3 Click Ports COM amp LPT All installed ports should appear the list The COM port number assigned to each port will be shown Document Number 3PCI 4310m Chapter 3 13 Setting Driver Options Chapter 4 Setting Driver Options Configuring Port Settings By entering the Properties dialog a variety of information can be obtained and several port parameters can be configured 1 Onthe Ports COM amp LPT list double click the name of the port to be configured 2 Onthe Port Properties dialog click the Port Settings tab The dialog will display the current settings for Bits per second Data bits Parity Stop bits and Flow control If necessary change these settings to the required values nm Port 1 Card COM2 Properties General Settings Driver Details Bits per second 9600 Data bits 8 Party Stop bits 1 wont al Advanced Restore Defaults Figure 7 Port Settings Dialog 3 Click Advanced The Advanced Port Settings dialog will appear This screen allows you to set the Receive and Transmit FIFO buffer thresholds RTS Control parameters Hardware handshaking hysteresis level and the COM port name 14 Chapter 4 Document Number 3PCI 4310m Setting Driver Options r Advanced Settings for COM
41. ick OK then click OK again on the Settings page After returning to the Device Manager screen it should refresh automatically The name number of the port in the Device Manager list should now show the change Document Number 3PCI 4310m Chapter 4 17 Installing Linux Driver Software Chapter 5 Installing Linux Driver Software Installing Mlport Driver on Ubuntu 10 04 Ubuntu 10 04 Desktop 32 bit and 64 bit 1 Install the Miport serial card in the computer 2 Open a terminal window This can be found on the desktop menu under Application Accessories Terminal D 3 optional Start recording everything entered into and output to the terminal This step is only required if there is a problem installing the driver username computer script t 2 Mlport time a Mlport script Script started on Tue 31 Aug 2010 03 56 11 AM CDT 4 Extract the archive that stores the Mlport driver username computer tar zxvf media MI portY 3 0 1 dri 2 6 port port 3 0 0 tar gz MI 3 0 0 MI 3 0 0 local port 3 0 0 bbmknod sh MI port 3 0 0 README port 3 0 0 README pdf port 3 0 0 Makefile MI port 3 0 0 MI Mi port 3 0 0 rc Ml port 5 Change the current working directory to where the Mlport driver source code is located username computer cd Mlport 3 0 0 6 Compile the Mlport device driver username computer mak
42. ite state and neither can communicate To overcome this limitation RS 485 mode was developed in which transmitters connected to the line are put into a high impedance tri state state when not transmitting RS 485 Operation RS 485 solves some of the limitations of RS 422 allowing multidrop communications using 2 wire and 4 wire connections from multiple transmitters and receivers To accomplish multidrop operation the transmit driver must be enabled only during transmit by asserting the enable input TX SD of the transmitter and tri stated to a high impedance after the data has been sent In the 2 wire half duplex mode the receiver is enabled when not transmitting and disabled RX D during transmit called echo off because it avoids having the device receive its own transmissions Figure 16 An RS 485 Two Wire Multidrop Connection Send Data Control Miport cards provide Send Data Control SDC for the RS 485 driver and receiver This is hardware controlled based on the contents of the UART output buffer When data is present the driver is enabled when the output buffer becomes empty it is disabled This automatically handles whatever baud rate is used The RS 485 transmitter and receiver have separate settings for 2 wire modes TX SD RX SD or 4 wire TX SD RX ENABLE Document Number 3PCI 4310m Chapter 8 33 RS 422 485 Connections Operation Advanced Settings for COM3 Use FIFO Buffers
43. lacing the bottom DIP switch in the RX SD position configures the port for two wire operation In this mode the port s transmitter and receiver are connected to the same wire pair The receiver is disabled when its transmitter is sending preventing the port from receiving its own data Document Number 3PCI 4310m Chapter 2 9 Serial Card Setup Installing the Serial Card 10 2 10 11 12 CAUTION This is an Electrostatic Sensitive Device Use ESD precautions for safe handling Before removing the card from the anti static protective packaging e Discharge any static electricity buildup on your body by touching a large grounded metal surface or the metal chassis on equipment connected to earth ground by a 3 wire power cord Use of a grounding wrist strap is recommended e Avoid touching the gold connectors or other parts on the card except when necessary to set the configuration DIP switches e Hemove AC power from the computer before inserting the card Shut down your computer Unplug the power cord to remove power to prevent accidentally turning on the computer during installation Remove the cover of the computer Locate an empty PCI expansion slot Remove the expansion slot cover Save the retaining screw Ground yourself to the computer chassis before and while inserting the card Install the card into the unused slot Be certain that the card is inserted completely fully seated in the
44. le DIP switch is placed in the TX SD position In this position the transmitter is only enabled when data is being sent The transmitter is tri A 4 Appendix A Document Number 3PCI 4310m DIP Switch Mode Settings stated when not sending data allowing other transmitters on the communications line to transmit without interference DIP Switch 3 RS 232 422 485 ports The bottom DIP switch 3 configures the port for half duplex two wire RS 485 operation or full duplex four wire RS 422 RS 485 operation Placing the bottom DIP Switch in the RX ON position configures the port for four wire operation In this mode the receiver is continuously enabled allowing it to receive all data on the communications line Since the transmitter sends data on the other wire pair the port does not receive its own transmissions Placing the bottom DIP switch in the RX D position configures the port for two wire operation In this mode the transmitter and receiver are connected to the same wire pair The receiver is disabled when its transmitter is sending preventing the port from receiving its own data Setting the DIP Switches on RS 422 485 Only Ports The 3PCIOUA Mlport card provides a combination of RS 232 422 485 and RS 422 485 only ports Ports that do not include RS 232 operation use double DIP switches rather than triple DIP switches These DIP switches operate the same as the two bottom DIP Switches in the RS232 422 485 ports Switch 1
45. n some cases the software may require connections to verify that a cable is connected and the devices are ready for access typically DTR DSR is used Some devices may use software handshaking in which data characters e g Xon Xoff are sent to start and stop the incoming or outgoing data These unprintable characters have the decimal value 17 and 19 and can often be generated in a terminal program with CTL Q or CTL S RTS Control In RS 232 Mode In RS 232 mode Mlport cards support software and hardware handshaking Handshake lines can be controlled from the communications software used with your application When operating a Mlport card port in RS 232 mode set the RTS Control driver setting to Normal This ensures that the RTS line will be free to be controlled by your software If your communications software uses software handshaking hardware handshake lines will not be required IV Use FIFO Buffers Receive buffer Low 1 High 64 14 Cancel Default Transmit buffer Low 1 AR A aaa ATS Control RS 485 Mode fection control delay rit irre 10 E Hardware handshaking hysteris level characters Low 0 High 52 0 T Enable detection of extemal Plug and Play COM devices COM Port Name COM3 hd Figure 13 RTS Control Select Normal for RS 232 Operation 30 Chapter 7 Document Number 3PCI 4310m RS 422 485 Connections Operation Chapter 8 RS 422 485 Connecti
46. n the device 5 Connect the Signal Ground pin 5 to Signal Ground on the device RS 422 Point to Multipoint Connection In a multi slave RS 422 connection TD B and TD A connect to RD B and RD A on all the slaves If the slaves have Transmit connections only one device can be connected back to the master 85 422 Master 422 Device 1 422 Device 2 3PClxxx Card to Remaining to RD B 5422 Devices to RD A Connections for 422 Master 422 Device 3 to 422 Receive Only Devices 422 Device Pinouts Vary Figure 21 RS 422 Master RS 422 Receive Only Devices Document Number 3PCI 4310m Chapter 8 37 RS 422 485 Connections Operation 4 Wire RS 485 Connection In a 4 wire RS 485 system each receive line connects to the same receive terminal on all slaves and each transmit line connects to the same transmit terminal on all slaves The master to the first slave is connected as above 4 Wire Master 485 Device 1 485 Device 2 Card Set 5 485 RD A to TD A to TD B to RD B Remaining 485 TD amp to RD A 4JWire Devices RD B to TD B 4 Wire R5485 Connections RS 422 Connections only one Device 484 Device 3 Figure 22 4 Wire RS 422 or RS 485 Connections 38 Chapter 8 Document Number 3PCI 4310m DIP Switch Mode Settings Chapter 9 Troubleshooting Mlport Cards Your Mlport card should be fully functional when you receive it from the factory Operational problems enco
47. nts of the buffer to program memory This is intended to optimize the throughput of the data The default value is 14 Usually this parameter does not have to be changed Setting the RTS Control Parameter 1 Set RTS Control to Normal for RS 232 set RTS Control to RS 485 Mode for 2 wire or 4 wire RS 485 operation Either setting can be used for RS 422 Typically the COM parameters set in this dialog box are overridden by the software application Document Number 3PCI 4310m Chapter 4 15 Setting Driver Options Note For proper operation the DIP switches on the PCI card must be set for the same mode Refer to Chapter 2 for more information on configuring the DIP switches The Direction control delay bit times box allows you to set the length of time the Transmit driver continues to be enabled after the last bit of data in the transmit register has been sent The purpose of this setting is to maintain the transmission line in a know idle state until the data has reached its destination If the line is released too soon it can pick up noise that could cause problems on the communications system This parameter is preset to a value of 10 bit times and typically will not have to be changed For longer transmission lines this value may have to be increased Setting the Hardware Handshaking Level The Hardware handshaking Hysteresis level characters parameter allows you to set how long the local UART will continue to accept data
48. o Appendix B for additional cable configurations and pinouts RS 422 485 Signal Designations Typically RS 422 and RS 485 interfaces use five lines including two signal pairs and ground One signal pair is the transmit pair labeled TDA and TDB The other signal pair is the receive pair labeled RDA and RDB Signal ground is labeled GND Document Number 3PCI 4310m Chapter 8 31 RS 422 485 Connections Operation RS 422 485 Differential Signals In RS 422 and RS 485 interfaces signals are sent on differential pairs In the idle or Mark state the TDA line will be OV with respect to wrt ground and the TDB line will be about 4 4V wrt ground Sensing differentially across the two lines the voltage will be 4 4V representing a Mark state When the transmitter changes to the Space state TDA goes to 4 4 and TDB goes to OV In that state the differential voltage will be 4 4V Tx Enable RD B Ground Figure 15 Differential transmitter receiver The receiver input is a differential circuit which senses the difference in voltage across the transmission line as described above In addition any common mode noise picked up equally on both wires of the twisted pair is cancelled Receiver sensitivity is rated at 200mV A separate signal ground common connection provides a common mode reference for the transmitter and receiver and is often used to ground a shield in the cable These fa
49. ons Placing the bottom DIP switch in the RX SD position configures the port for two wire operation In this mode the port s transmitter and receiver are connected to the same wire pair The receiver is disabled when its transmitter is sending preventing the port from receiving its own data A 6 Appendix A Document Number 3PCI 4310m Connector Pinouts Appendix B CONNECTOR PINOUTS RS 232 Pinouts Description Direction DB 9M DUE DCD Data Carrier Detect E REM I AE MEE TD TransmitData DTR Data Terminal Ready Outpt 4 enD SignalGround 5 DSR DetaSetReay 6 RequestioSend Outpt CTS CleartoSend Ringindiator o Figure 27 RS 232 Signal Designations and DB 9 Pinout Signal Name DB 9 Pin DB 25 Pin DTE DTE Chassis GND Shield DB 9 Shell Figure 28 RS 232 DB 9 to DB 25 Conversion Cable Pinout Document Number 3PCI 4310m Appendix B B 1 Connector Pinouts RS 422 485 Pinouts Bos ec call Pin TDAC Transmit Data A Output Signal Ground 5 RDB Receive DataB impt 9 Figure 29 RS 422 485 Signal Designations and DB 9 Pinout With 2 wire RS 485 mode operation your connection cable must jumper TDA to RDA and TDB to RDB Connect from TDA and TDB to the Data A and Data wires of your RS 485 network Note R efer to Chap
50. ons Operation RS 232 Signal Designations The primary RS 232 signals are TD transmit and RD receive Together with GND ground they often are referred to as a 3 wire interface The RTS Request to Send and CTS Clear to Send signals are handshaking lines used to indicate to the other device that data can be sent or received These lines may be enabled or disabled on a byte by byte basis and are used to prevent buffer overrun or the loss of data Two secondary handshaking signals are DTR Data Terminal Ready and DSR Data Set Ready They are usually enabled when the device is powered up and the port is open They may be used for flow control by some devices instead of RTS and CTS DCD Data Carrier Detect is used by a modem to indicate Carrier to the computer so data can be sent received RI Ring Indicator is output by a modem to indicate that the phone or FAX line has a incoming call so it can be handled DTE and DCE There are two types of RS 232 ports DTE Data Terminal Equipment which is typically a computer DCE Data Communications Equipment which is typically a modem Data Terminal Equipment DTE When a DTE is connected to a DCE they are linked directly together using a modem cable wired pin to pin so that the inputs match the outputs of the other Data Communications Equipment DCE When two pieces of equipment of the same type are interconnected a DTE connected to a DTE or a DCE to a DCE
51. ons Operation RS 422 485 Mode In RS 422 RS 485 mode Mlport serial ports provide two sets of differential signal pairs and signal ground for each port The RS 422 and RS 485 standards use balanced differential drivers and receivers for each signal This facilitates greater communication distances than unbalanced systems such as RS 232 RS 422 operation is suitable for interconnecting a computer and one device for full duplex point to point bi directional communication or a computer and several devices for unidirectional point to multipoint communication RS 422 interfaces are commonly used for video editing control camera control electronic signage television studio satellite dish control performance lighting and audio equipment control RS 485 operates with the same signals and signal levels as RS 422 but differs in that it allows multiple devices to share the same communication link using half duplex 2 wire or full duplex 4 wire connections RS 485 interfaces are commonly used in manufacturing and industrial commercial control applications such as programmable logic controllers telemetry and process control RS 422 485 Signal Designations and DB 9 Pinout Description Direction DB 9MPin RDA Receive Data A TDB Transmit Data B Output TDA Transmit Data A Output Signal Ground RDB Receive Data Figure 14 RS 422 485 Signal Designations and DB 9 Pinout Note Refer t
52. slot Secure the card with the mounting screw from Step 5 Replace the cover plug in the power cord Connect your cables Power up the system Install the drivers as described in Chapter 3 Chapter 2 Document Number 3PCI 4310m Driver Software Installation Chapter 3 Driver Software Installation Installing Windows 7 Driver Software Windows 7 does not have a Found New Hardware Wizard Therefore the Driver must be installed manually 1 Install the MIPort Card and place the CD in the CD ROM Drive 2 Open Device Manager 3 PCI Serial Port will be listed under Other Devices 4 Select PCI Serial Port right click and select Update Driver 5 Select brows my computer and locate the drivers on the CD ROM 6 Awindows security notice will be displayed Select install This notice will be displayed again Select install 7 Windows successfully updated driver software will be displayed Select close 8 In device manager the MlPort Card will be listed under Multiport Serial Adapter Additional COM Ports will be listed under Ports COM amp LPT Installing Windows XP Driver Software Installation of the Mlport driver software on Windows is a three step process 1 Windows XP searches and identifies new hardware that has been installed 2 You use the Found New Hardware Wizard to install the driver software for the card 3 You use the Found New Hardware Wizard to inst
53. t characters a separate window from received characters e Transmit amp Receive Activity Indicators Unprintable Characters Shown 2 Digits Within Left amp Right Angle Brackets e Visual Indication of Handshaking Lines DTR DSR DCD and RTS CTS Red Hi Option for Setting or RTS lines high or low Option for Repeat Mode last character Function Character Sequence is repeated until set off Configuration Settings o Baud Rates 150 300 600 1200 2400 9600 19 2 28 4 57 6 115 2K 9600 default and recommended o Parity None Odd Even Mark Space None default Data Bits 5 6 7 8 8 default StopBits 1 1 5 2 1 default Installing ComTest 1 From Windows Explorer under Windows Programs COMTest find the setup exe file on the CD Document Number 3PCI 4310m Appendix D D 1 Declaration of Conformity BX Exploring F Windows Programs COMT est File Edit View Tools Help All Folders Contents of F swindows Programs COMTest WindowsUpdate f 1 sie Twe 1 Modified 22 Recycler History Ist 1KB LST File 9 14 04 6 12 P System Volume Informe is Read me 1KB ME File 9 14 04 6 12 P Temp Setup exe 552KB Application 9 14 04 6 12 P E Winnt Hep D He a ak Drivers F Linux 2
54. ter 2 for example connections Note that the EIA RS 422 Specification labels data lines with an A and B designator Some RS 422 equipment uses a and designator In almost all cases the A line is the equivalent of the line and the B line is the equivalent of the line Note For more information on RS 422 communications refer to the B amp B Electronics RS 222 485 Application Note at www bb elec com 2 Wire 485 Devices gt Data gt gt SG Common Isolated GND Card 2 Wire RS 485 Set RS 405 Connections Figure 30 2 Wire RS 485 Wiring Diagram B 2 Appendix B Document Number 3PCI 4310m Connector Pinouts DATA TxRx DATA TxRx Figure 31 2 Wire RS 485 Wiring Document Number 3PCI 4310m Appendix B B 1 Appendix Troubleshooting With ComTest ComTest is a simple 32 bit Windows Windows 98 2000 2003 Server ME XP NT 4 0 and Vista COM port test program included on the Mlport CD It can also be downloaded from the B amp B Electronics website at www bb elec com The program allows multiple ports at any address and IRQ to be opened at any given time ComTest Features e AWindows Terminal Program for Simple Checks of Serial Ports Works with USB Serial Converters amp ISA or PCI Serial Cards Serial Port Access under Windows 98 2000 2003 Server XP Vista COM1 COM8 or above Dual Windows show typed transmi
55. untered on first use will typically be the result of incorrect connections or operation The following procedure will assist you in locating the source of you problems Starting Up If you have any trouble starting your system after installing the card the card may not be properly seated in the slot Power down the computer remove and re insert it or try a different slot Ensure your system is set for PnP OS Windows NT and Linux should be set to non PnP Checking Connections RS 232 422 485 Operation 1 Ensure that you have set up your card for the correct mode of operation RS 232 RS 422 RS 485 2 wire or 4 wire using the DIP switches on the card and Advanced Port Settings Note For more information on DIP switches refer to Chapter 2 For more information on Driver Settings refer to Chapter 5 2 Ensure your communications parameters baud rate parity stop bits are set correctly at both ends of your link RS 232 Operation 1 Mlport cards are DTE devices If you are connected to DCE device use a straight through cable If you are connected to another DTE device use a crossover or null cable 2 If hardware handshaking is required ensure you have the right cables and that both ends of your link are configured the same for handshaking RS 422 485 Operation 1 Check your pinouts In RS 422 or RS 485 mode the A lines should match your A or lines B lines should match your or lines Note
56. x kernel headers for the current Linux kernel In the command below the part after linux headers should match the output of the command above Document Number 3PCI 4310m Chapter 5 21 Installing Linux Driver Software username computer sudo apt get install linux headers 2 6 32 21 server Setting up linux headers 2 6 32 25 2 6 32 25 45 Setting up li nux headers 2 6 32 25 server 2 6 32 25 45 5 Create a folder for mounting the CD ROM username computer sudo mkdir p media cdrom 6 Check that the folder was created for mounting the CD ROM username computer 15 media cdrom floppy floppy0 If cdrom is not listed above then the folder was not create correctly 7 Insert the CD ROM into the CD ROM drive and mount the CD ROM username computer sudo mount t 1509660 r dev cdrom media cdrom 8 Check that the CD ROM was mounted username computer 15 media cdrom autorun inf inux manuals Mlport ico windows If the files listed above are not shown then the CD ROM was not mounted 9 Extract the archive that stores the Mlport driver username computer tar zxvf media cdrom linux drivers 2 6 Ml port M port 3 0 0 tar gz MI port 3 0 0 MI port 3 0 0 rc local MI port 3 0 0 bbmknod sh MI port 3 0 0 README MI port 3 0 0 README pdf port 3 0 0 Makefile MI port 3 0 0 MI port c Mi port 3 0 0 rc port 10 Unmount the CD ROM username computer sudo umount media cdrom 22 Chapt
57. y with a 4 7 pull up resistor on the RDB line and a 4 7 kO pull down resistor on the RDA line These values are usually adequate for networks that do not implement termination resistors and have 31 or fewer nodes When termination is used biasing must be increased resistors decreased calculated according to the termination value and number of nodes Through hole pads are provided on Mlport cards for adding termination resistors and bias resistors The photograph below shows the layout of through hole pads for installing termination and bias resistors On all Mlport cards the top set of holes is for the termination resistor The middle and bottom sets of holes are for bias resistors Note the factory installed 4 7k resistors in the photograph Since bias resistors are always the same value e g R pullup pulldown 4 7k there is no need to identify which set of holes is for pull up and which is for pull down Document Number 3PCI 4310m Chapter 8 35 RS 422 485 Connections Operation Figure 19 Termination and Bias Resistor Placement Note For more information on termination biasing and how to calculate resistor values download the RS 422 485 Application Note from www bb elec com 2 Wire RS 485 Connections The following diagram shows how to wire the DB 9 connector that will plug into your card for 2 wire RS 485 operation To Wire 485 Devices gt Data gt gt
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