Installation Guide - Contemporary Controls
Contents
1. Make sure common mode voltage Vcm does not exceed 7 Vdc for 485 and 485D MAUs hub port should not have any termination applied Follow the same rules for other segments attached to different hub ports Each hub effectively extends the segment another 900 feet 275 meters Maintain the same cabling polarity as the NIMs by using cable connections that do not invert the signals 485 DC Coupled EIA 485 Backplane Mode If it is desired to utilize software that puts the ARCNET controller chip into backplane ws Modular Connector Pin mode then it is necessary to use the MAU20H 485 The rules for using the Sr one MAU20H 485 are the same for using the Pin MAU20H 485D The only difference is that the MAU20H 485 requires backplane mode on the controller chip while the MAU20H 485D cannot be used in backplane mode 485X AC Coupled EIA 485 Usage Not Used Not Used Not Used Line Phase B Line Phase A Not Used Not Used Not Used 1 2 3 4 5 6 T 8 The AC coupled EIA 485 transceiver offers advantages over the DC coupled EIA 485 Table 2 Modular 485D No bias adjustments need to be made Connector Pin since each transceiver has its own fixed bias Assignments for TB5 network isolated by a pulse transformer Unlike TD877123 01A 10 the DC coupled EIA 485 wiring polarity is unimportant Either inverted or straight through cable can be used or even mixed within one AC coupled network Much higher c2. case this warranty does not cover repair or replacement This warranty in no way warrants suitability of the product for any specific application More warranty information can be found on our web site www ccontrols com Returning Products for Repair Before returning a product for repair contact Customer Service A representative will instruct you on our returns procedure Contemporary Control Systems Inc 2431 Curtiss Street Downers Grove Illinois 60515 USA Tel 1 630 963 7070 Fax 1 630 963 0109 E mail info ccontrols com WWW _shttp www ccontrols com Contemporary Controls Ltd Sovereign Court Two University of Warwick Science Park Sir William Lyons Road Coventry CV4 7EZ UK Tel 44 0 24 7641 3786 Fax 44 0 24 7641 3923 E mail info ccontrols co uk TD877123 01A 12
3. incorporates TMC s Figure 8 Modular HYC4000 transceiver which Jack al umb oe requires that the ARCNET Orientation for controller chip be TPB and 485T programmed for backplane mode The rules for using the MAU20H 485T are the same for using the MAU20H 485X Connections to this MAU are made using dual RJ 11 connectors TD877123 01A 11 NEED MORE HELP INSTALLING THIS PRODUCT More comprehensive information can be found on our web site at www ccontrols com Browse the Technical Support section of our site for a look at our interactive on line technical manuals downloadable software drivers and utility programs that can test the product When contacting one of our offices just ask for Technical Support Warranty Contemporary Controls CC warrants its product to the original purchaser for one year from the product s shipping date If a CC product fails to operate in compliance with its specification during this period CC will at its option repair or replace the product at no charge The customer is however responsible for shipping the product CC assumes no responsibility for the product until it is received This warranty does not cover repair of products that have been damaged by abuse accident disaster misuse or incorrect installation CC s limited warranty covers products only as delivered User modification may void the warranty if the product is damaged during installation of the modifications in which
4. the same ground potential in order that the common mode voltage requirement Figure 5 Screw 7 Vdc of the EIA 485 specification is Terminal Connector achieved This can be accomplished by running Numbering a separate ground wire between all computers Orientation or by relying upon the third wire ground of the power connector assuming that the DC power return is connected to chassis ground on the computer Another approach would be to connect the DC common of each computer to a cold water pipe Connected systems 4 LINE LINES LINE each with different elevated 2 LINE LINE LINE grounds can cause unreliable 2 SEED SMELO te communications or damage to the Table 1 Screw Terminal Connector Pin E1A 485 differential drivers Assignments for 485 485D Therefore it is important that an and 485X adequate grounding method be implemented Pin 3 on the screw connector can be used for the common ground connection TRANSCEIVER 485 485D 485X PIN TD877123 01A 9 Segments of 485D connected NIMs or MAUs can be extended through the use of active hubs Selecta MOD HUB expansion module with a 485 compatible port Connect one end of the segment to this port following the same termination rules as used for a NIM This hub port counts as one NIM when cable loading is being calculated The NIM electrically closest to the 5V 5V Rb je a4 TXEN A E TXEN j Rt Rt i P1P2 P1P2 RXIN Rb vem Rb Figure 6
5. will function with this EI A 485 version of the PCM20H without modification Use the three position screw connector for connecting multiple nodes onto one segment This segment can be up to 900 feet long of IBM type 3 unshielded twisted pair cable and as many as 17 nodes can occupy the segment Make sure that the phase integrity of the wiring remains intact Pin 1 of the screw connector on each NIM or MAU must be connected together The same applies to pin 2 TD877123 01A 8 PE tard ARSHET Adopter Figure 4 TB5 bus segments can be extended through active hubs Termination Each end of the segment must be terminated in the characteristic impedance of the cable If it is desired to apply termination connect a 100 ohm 1 4 watt resistor across pins 1 and 2 Bias In addition to the termination it is also necessary to apply bias to the twisted pair network so that when the line is floated differential receivers will not assume an invalid logic state Bias is not provided by the MAU It is assumed that sufficient bias is provided by the existing E A 485 NIMs Refer ED to the appropriate NIM user manual for a more in depth discussion on bias requirements A For EJA 485 DC operation it is very important SSSI that all devices on the wiring segment be 2 3 referenced to
6. 0H s resource settings I O range and Interrupt Request After modifying these parameters press OK You may then be prompted with a warning press Yes to continue 8 Your PCM20H should now be accessible at the I O and Interrupt settings you selected in step 7 9 You may also need to run the Setnode exe program located on this disk to set your node ID see readme txt Some application programs require the node ID to be set before they can operate correctly Software Utilities The disk shipped with the PCM20H contains the files to enable the PCM20H under DOS Windows 3 x and Windows 95 98 ME If you are running DOS or Windows 3 x please read the readme dos file If you are running Windows 95 98 ME please read the readme95 wri file This disk also contains several DOS utilities which can be used after your PCM20H has been properly enabled IROTEST EXE This program will allow you to test your I O and interrupt settings This program requires two parameters The first TD877123 01A 5 parameter is the base I O address of the PCM20H in hex The second parameter is the interrupt setting used by the PCM20H in decimal For example irqtest 2EO 5 NETMAP EXE This program which provides a list of the nodes currently on your network requires just the base I O address of the PCM20H in hex For example netmap 2E0 This is an off line utility requiring at least two active nodes on the network in order to work S
7. ETNODE EXE This program provides the ability to set the node ID on your PCM20H card This program requires two parameters The first parameter is the base I O address of the PCM20H in hex The second parameter is the desired node ID in hex For example setnode 2E0 If FIELD CONNECTIONS The PCM20H is available in several transceiver options Each transceiver which is matched to a particular cable type is identified by a three digit suffix appended to the model numbers The capabilities of each transceiver differs CXB Coaxial Bus For hubless systems the CXB transceiver can be used NIMs are interconnected with RG 62 u cables and BNC Tee connectors Each CXB NIM represents a high impedance connection in both the powered and unpowered states Therefore passive termination must be applied to both ends of a bus segment Use BNC style 93 nominal ohm resistors at each end The maximum segment length is 1000 feet and the maximum number of NIMs that can be connected to a segment is eight Bt p l I PE Card ARCHET Adapter WLIO TCL Figure 1 Use BNC Tee connectors to interconnect CXB NIMs To extend a bus segment beyond 1000 feet an active hub is required If the hub port is of the CXS type connection can be made if a few simple rules are followed Only connect this type of hub port at the end of a bus segment Do not connect the hub to the middle of a segment since the hub port is not of the
8. H 485T 100mA TD877123 01A 2 INSTALLATION The PCM20H conforms to release 2 1 of the PC Card standard Type II 5 0 mm thick cards Consult your laptop or notebook user manual for instructions on how to install the adapter card Attached via a 15 conductor cable to the adapter card is a medium access unit Field connections are made to the medium access unit DOS and Windows 3 1X Instructions One of the design goals for the PCM20H PC Card ARCNET Adapter was to use existing drivers without requiring software modifications to those drivers PCM20 EXE is a terminate and stay resident TSR software utility that configures the PC Card socket to match the requirements of the driver software PCM20 EXE must be executed before the driver attempts to access the PCM20H PC Card ARCNET Adapter The command line for the PCM20 EXE utility is as follows pcem20 p lt port adr gt i lt enable gt 1 lt interrupt level gt n lt node id gt e h where p lt port address gt sets the base address of the adapter 16 sequential addresses are used i lt enable gt enables the interrupt if lt enable gt is 1 disables the interrupt if lt enable gt is 0 l lt interrupt level gt sets the IRQ number for the interrupts n lt node id gt sets the node address in hexadecimal that is stored on the PCM20H PC Card ARCNET Adapter to simulate the DIP switch setting e enables extended error reporting This will cause the Card Services vendor a
9. PCM20H ARCNET Network Interface Modules for PC Card Computers INSTALLATION GUIDE INTRODUCTION The PCM20H series of ARCNET network interface modules NIMs links PC Card compatible computers with the ARCNET local area network thereby providing ARCNET connectivity to laptop and notebook style computers The PCM20H conforms to release 2 1 of the PC Card standard Type II 5 0 mm thick cards The ARCNET transceiver circuitry is located in a detachable MAU medium access unit which plugs into the PCM20H adapter MAUs exist for various cabling media such as coaxial cable and twisted pair cable and are all interchangeable with one another A 15 pin connector with a short cable attaches the MAU to the adapter The PCM20H incorporates the COM20022 ARCNET controller with enhanced features over earlier generation ARCNET chips New features include command chaining sequential access to internal RAM duplicate node ID detection and variable data rates Data rates from 156 kbps to 10 Mbps are possible There are several versions of the PCM20H each of which is designated by a particular transceiver The PCM20H CXB can support either coaxial star or bus networks The PCM20H TB5 and PCM20H TPB support twisted pair bus with either RJ 45 or RJ 11 connectors The PCM20H 485D supports non backplane mode DC EJA 485 The PCM20H 485X supports non backplane mode AC EIA 485 The PCM20H 485 supports backplane mode DC EJA 485 while the PCM20H 485T supports back
10. en resident PCM20 EXE uses about 18K bytes of RAM in the lower address space Base Port Address When setting the port address PCM20 EXE assumes that the right most nibble of the base port address is 0 Therefore use base addresses such as 300h 310h and so on Node ID Switch Emulation If the node ID switch logic is supported by the application software enter the desired node ID non zero value in the command line A zero will prevent the adapter from joining the network Remember that the node ID switch is simply a register that may or may not be read by the application software It does not directly set the adapter node ID address The application software must do that Instructions for Windows 95 98 ME Upon plugging the PCM20H into the PC Card slot you will be prompted for a disk from the manufacturer Use the provided disk and once installed your PCM20H will appear to the system as a standard ISA COM20020 based ARCNET card If you want to use this card for Windows NDIS based networking do NOT load this disk Go to our web site at http www ccontrols com and retrieve the appropriate PCM20 NDIS driver Then create a new disk using the files from our site and provide this to Windows when prompted for a disk from the manufacturer Under Windows 95 after you load the PCM20 enabler you will be able to adjust your PCM20H s I O base address Under Windows 98 however the assigned I O base address is not adjustable If your d
11. high impedance type Do not terminate the cable end which attaches to the hub port since a CXS port effectively terminates the end of a bus segment Simply remove the BNC Tee connector and terminator from the segment end and attach the cable directly to the hub port The opposite segment end still requires termination if no hub connection is being made TD877123 01A 6 Passive hubs should not be used with CXB NIMs and only the use of RG 62 u coaxial cable is recommended for segments Contemporary Controls CC also supplies BNC terminators and Tee connectors Ask for BNC TER and BNC T respectively One note of caution there is a minimum cable length between nodes 6 feet 2 meters Do not violate this specification since unreliable operation may result O OO E E Pe ford ARCNET Adapter Figure 2 Bus segments can be extended through active hubs If star operation is required of the PCM20H instead of bus simply connect a BNC TER and BNC T to the end of the coaxial cable and then attach the combination to the MAU These accessories are included with the product This arrangement effectively converts the CXB transceiver into a CXS compatible node TB5 TPB Twisted Pair Bus The CXB transceiver can be modified to drive a balanced cable system with the addition of some components This configuration is called TB5 and it
12. nd version to be displayed Additional information about certain errors will also be displayed h displays the syntax of the PCM20 EXE command line There are defaults built into the PCM20 EXE software These defaults are as follows port address 300h interrupts disabled IRQ level IRQ5 Node ID OFFh The Card Services software which manages the PC Card socket will check the resources installed in your computer and will complain if you attempt to request a resource that is already in use For example if you have COM4 in your computer the default base address is TD877123 01A 3 2E8h If you request a base address of 2EOh for the PCM20H PC Card ARCNET Adapter Card Services will reject your request because of the overlap occurring between 2E8h to 2EFh If this occurs you will either have to select a different address for the PCM20H PC Card ARCNET Adapter or remove the COM4 hardware from your computer Similar conflicts could also occur with the requested interrupt levels If a conflict does occur PCM20 EXE reports the problem and then exits without remaining resident If PCM20 EXE successfully configures the PC Card socket then it will remain resident Once it is resident executing it again will report that it is already resident and will exit leaving the resident version still in memory The only way to remove the resident version is to reboot the computer PCM20 EXE is intended for use with MS DOS version 5 0 and above Wh
13. ommon mode voltage levels can be achieved with AC coupling due to the transformer coupling which has a 1000 Vdc breakdown rating There are disadvantages to the AC coupled transceiver as compared to the DC coupled technology The DC coupled distances are longer 900 feet 275m compared to the AC coupled distance 700 feet 213m The AC coupled transceiver is optimized for 2 5 Mbps while the DC Figure 7 Modular Jack Coupled transceiver will operate over all Numbering Orientation for TB5 six baud rates The cabling rules of the 485X are similar to the 485D and 485 A three position screw connector is used with each MAU Wire a maximum of 13 NIMs to any one segment Apply termination to the end NIMs Do not mix 485D and 485X NIMs together on one segment however bridging of the technologies is possible using active hubs with the appropriate transceivers To extend 485X segments use a hub as discussed under the 485D section Make sure that the active hub transceivers are of the 485X type Cable inversion is not of any consequence 485T AC Coupled EIA 485 Optional 123456 There is a special MAU available that supports the Wiring Chart RJ 11 Connector PIN TPB 485T 1 2 N C N C 3 LINE LINE 4 LINE LINE 5 N C N C 6 z Table 3 Modular Connector Pin Assignments for TPB and 485T Toyo Microsystems 7 Corporation TMC HYC4000 transceiver The we MAU20H 485T
14. plane mode AC EIA 485 The PCM20H is shipped with a 3 5 9cm disk containing our DOS Windows 3 x and Windows 95 98 enabler software Once loaded programs written for the PCX20 will transparently operate with the PCM20H The PCM20H is primarily intended for industrial applications Although functionally equivalent to its predecessors the PCM20 and PCM20E the PCM20H has improved EMC performance ruggedized MAU case and locking MAU connector The PCM20 PCM20E and PCM20H are all software compatible CONTEMPORARY SPECIFICATIONS Environmental Operating temperature 0 C to 55 C Storage temperature 20 C to 65 C Data Rates PCM20H 10 Mbps 5 Mbps 2 5 Mbps 1 25 Mbps 625 kbps 312 5 kbps 156 25 kbps The CXB TB5 and TPB models can only operate at 2 5 Mbps The 485X and 485T models can only operate at 1 25 2 5 5 0 or 10 Mbps Dimensions Type II adapter 3 370 L x 2 126 W x 0 196 T 85mm x 54mm x 5mm MAU 3 175 L x 1 835 W x 1 005 T 81mm x 46mm x 26mm Cable 11 125 28 3cm Approx MAU base to adpater base Shipping Weight 1 1b 45kg I O Mapping Supports I O mapping on any 16 byte boundary Interrupt Lines Supports IRQ2 through 15 Compatibility PCM20H series NIMs are compliant with ANSI ATA 878 1 and PC Card Standard Feb 1995 Power Requirements Model 5V PCM20H CXB 120mA PCM20H TBS5 120mA PCM20H TPB 120mA PCM20H 485 100mA PCM20H 485D 100mA PCM20H 485X 100mA PCM20
15. river or application needs to have the PCM20H in the lower portion of I O space 100 3FF a special Windows 98 enabler is available from our web site which will place the PCM20H between 240 and 3F0 hex TD877123 01A 4 PCM20H Enabler for Windows 95 98 ME Loading Instructions 1 Plug in your PCM20H PC Card 2 If the New Hardware Found dialog is shown select the Driver from a disk provided by hardware manufacturer option insert this disk and press OK If the Update Device Driver Wizard dialog is shown then insert this disk and follow the instructions provided by Windows 3 Provide the system with the location of this floppy drive when prompted e g a Some versions of Windows 95 98 ME may report that the file pcm20 vxd cannot be found If this occurs enter the location of this floppy disk in the box provided e g a 4 The driver should now be loaded Reboot the machine if requested by Windows 5 Now proceed to the Windows Control Panel Double click the System icon Choose the Device Manager tab Select the View devices by type option 6 The PCM20 should be listed as a generic category symbolized by a gray diamond It will not be listed under the network adapters category Double click this category and you should see a PCM20 device listed Double click this device 7 Now choose the resources tab Deselect the Use automatic settings box You can now modify your PCM2
16. rts a balanced twisted pair signal TPS or use a BALUN CC recommends a Mux Labs BALUN Figure 3 TB5 NIMs are connected in a daisy chain fashion with terminators inserted at both end NIMs available from CC under the part number BALUN connected to a CXS port on a MOD HUB expansion module The BALUN converts the balanced twisted pair signals to single ended signals suitable to the CXS port A more direct approach is to use a MOD HUB expansion module with a TPS port The TPS port has an internal BALUN and provides an RJ 11 connection The signal sense is inverted from the TB5 and TPB modules so that an inverted cable connection is required to either the BALUN or TBS5 TPB port 485D DC Coupled EIA 485 The PCM20H 485D supports DC coupled EIA 485 communication via a transceiver which replaces the coaxial hybrid transceiver in the MAU This transceiver receives the conventional P1 and P2 pulses intended for the coaxial hybrid transceiver and converts them to an elongated P1 pulse the width is equal to P1 and P2 suitable for the EIA 485 differential driver Therefore do not set the controller chip to backplane mode for EIA 485 communication as recommended in Standard Microsystems Corporation s SMSC application note and data sheet since CC implements the same signaling via circuitry With our approach the same software driver used for coaxial networks
17. supports shielded or unshielded twisted pair cable such as IBM type 3 Dual RJ 45 connectors replace the single BNC connector in order to support the popular modular plug connectors Included with the product is a TB5 TER which is a 100 ohm RJ 45 style terminator The TPB configuration is identical to the TB5 except that dual RJ 11 connectors are used and a TPB TER is supplied for termination Wiring between NIMs is accomplished in a daisy chain fashion with point to point cables connecting the various NIMs to create a bus segment The end NIMs will have one vacant RJ 45 socket which is to hold the RJ 45 style 100 ohm terminator required to terminate the end points of the bus segment Use twisted pair cable and observe polarity Modular plugs must be installed on this cable such that they do not invert the signals Most satin cable does not twist the pairs nor maintain signal polarity Do not use this cable To test for the proper cable connections hold both ends of the cable side by side with the retaining clips facing the same direction The color of the wire in the right most position of each plug must be the same if there is no inversion of the cable If this is not the case the cable is inverted Up to eight TB5 or TPB NIMs can be connected to one segment which cannot exceed 400 feet in length TD877123 01A 7 The overall distance of a twisted pair network can be expanded beyond 400 feet if active hubs are used Use a hub port that suppo
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