ASeries A600 User Manual Interface Converter X.21 ó V.35
Contents
1. J202 RTS TxCLK J201 sj 3 2 SHE g DTR RxCLK Figure 2 1 Configuration jumper blocks on A600 PCB WARNING 240Volt power must be removed from the A600 before the cover is removed and the 50 pin jumper re located Two combinations which are NOT supported by the A600 are as follows iii X 21 DTE Terminal to V 35 DTE Terminal iv X 21 DCE Modem to V 35 DCE Modem In the case of DTE to DTE iii no timing source exists for synchronous communications as timing is normally supplied by the DCE device In the case of DCE to DCE iv there are two timing sources which will create an ambiguous situation 2 2 2 3 A600 User Manual Selecting V 35 Clock Source The V 35 interface has two differential clock sources Serial Clock Transmit SCT and Serial Clock Receive SCR In the X 21 DCE to V 35 DTE case one of the two clock sources must be selected as a source for the X 21 interface Signal Element Timing signal Because the clock source is a differential signal it requires two lines Therefore the A600 provides a pair of jumper blocks J203 and J204 shown in Figure 2 2 to select the two lines These jumpers must always be moved as a pair To select V 35 SCT as the clock source move the pair of jumpers to the TxCLK position To select V 35 SCR as the clock source move the pair of jumpers to the RxCLK position The fac2. in Figure 1 1 They identify the DTE or DCE status of the port closest to that LED and are determined by the internal 50 pin jumper These LEDs provide a convenient method of identifying the status of each port without opening the case Bi colour LED is RED if corresponding port is DTE Bi colour LED is GREEN if corresponding port is DCE CABLE REQUIREMENTS Alfatron Pty Ltd recommends the use of shielded cable with all of its products Shielding reduces Electro Magnetic Radiation and improves noise immunity This helps minimise interference to other equipment and will improve communications reliability The recommended cable construction is as follows Take the shield surrounding cable wires and solder it to the Frame Ground FG pin If FG is not available use Signal Ground SG but in this case always use a separate wire for ground which is connected at both ends If a metalised backshell is used then it is preferred that the cable shield make 360 contact with the backshell at the point of entry The shield must be connected at both ends of the cable FACTORY SETTINGS The A600 is factory pre set to the following configuration X 21 DCE to V 35 DTE V 35 Clock Source J203 and J204 is set to TxCLK 35 Handshaking Line J205 is set to RTS A600 User Manual 5 0 5 1 INTERFACE PIN ASSIGNMENTS X 21 Interface Pin Assignments The direction of the signal lines depends on the selection
3. 21 port Ra Rb line pair The advantage of this approach is that all communication line signals are converted internally by the A600 to TTL levels and then converted to a level specific to either the X 21 or V 35 interface The TTL level signals therefore provide a common reference to both ends of the converter and show the signals as seen by the converter regardless of the type of interface configuration The A600 has six LED indicators on its front panel The LED marked Power is Yellow and indicates that the A600 has operating power The other five LEDs are Red Green bi colour indicators with the following meanings Configured for X 21 DCE and V 35 DTE Clock Data Clock signal from V 35 lines STR a b or SCT a b DCD Data Carrier Detect from V 35 device RTS Handshaking signal to V 35 device RTS or DTR RD Data received from V 35 device e TD Data sent to V 35 device Configured for X 21 DTE and V 35 DCE Clock Data Clock signal from X 21 line S a b IND Indicator signal to X 21 device CTRL Control signal to V 35 device RD Data received from X 21 device e TD Data sent to X 21 device The convention used on these bi colour LEDs is as follows Bi colour LED is RED if corresponding TTL signal is HIGH Bi colour LED is GREEN if corresponding TTL signal is LOW 2 5 3 0 4 0 A600 User Manual Rear Panel LED Indicators The two bi colour LEDs on the rear panel are shown
4. FATRON INTERFACE CONVERTER Clock IND CTRL RD TD Power ASerl Pees eee o o e DCD RTS 7 WA I Ne RIIIE Man ie A O 0000 O NA 7 CS 0 ce coccccee Om X 21 Status LED V 35 Status LED Status LED Red DTE and Green DCE Figure 1 1 A600 viewed from front and rear Light Emitting Diodes LEDs on Rear Panel The two LEDs shown on the rear panel in Figure 1 1 are a convenient method of identifying the DTE or DCE status of each port Bi colour LED is RED if corresponding port is DTE Bi colour LED is GREEN if corresponding port is DCE A600 User Manual 2 0 INSTALLATION 2 1 Selecting a Port as DCE or DTE Before installing the A600 please make sure that the 50 pin jumper is inserted into the correct DCE or DTE position to meet your requirements In the majority of cases when synchronous serial communications is used the DCE will provide the Clock Signal to the DTE device therefore the A600 supports the following two configurations of X 21 and V 35 i X 21 DTE Terminal to V 35 DCE Modem i X 21 DCE Modem to V 35 DTE Terminal these configurations are selected by removing the cover of the A600 and inserting the 50 pin jumper into the appropriate socket J201 or J202 located on the Printed Circuit Board PCB of the A600 as shown below
5. User Manual ASeries A600 Interface Converter X 21 V 35 ALFATRON The interfacing specialists A600 User Manual Version 1 10 May 1999 COPYRIGHTS All rights reserved This document may not in whole or part be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form without the express permission in writing from Alfatron Pty Ltd Copyright 1999 Alfatron Pty Ltd DISCLAIMER Alfatron Pty Ltd has made every attempt to ensure that the information contained in this document is accurate and complete Alfatron Pty Ltd makes no representation or warranties of merchantability or fitness for any particular purpose Alfatron Pty Ltd reserves the right to make changes to this document at any time without notice Therefore Alfatron Pty Ltd assumes no liability for damages incurred directly or indirectly from errors omissions or discrepancies with the hardware and the manual TRADEMARKS All Company and Product names are trademarks of the Company or Manufacturer respectively WARRANTY Alfatron warrants its products against defects in materials and workmanship for a period of one year from receipt by the customer All warranty is carried out on a return to depot basis unless an alternative warranty coverage has been arranged WARRANTY EXCLUSIONS The above warranty shall not apply to defects resulting from improper or inadequate maintenance by the customer unauthorised modific
6. ations or misues operation outside the environmental specifications for the product damage due to power surges lightening strikes or any other phenomenon outside normal operational specifications Alfatron Pty Ltd ACN 005 410 819 P O Box 4161 Unit 9 36 New St Ringwood VIC 3134 AUSTRALIA Web Site www alfatron com au AUSTRALIAN MADE 1 0 A600 User Manual PRODUCT DESCRIPTION The ASeries A600 is an X 21 bis lt gt CCITT V 35 interface converter and provides bi directional data communication between the X 21 and V 35 communication standards at data rates up to 2 Mbits second No changes are made to either data or timing signals and the A600 is transparent to data and any introduced protocol Both the X 21 and V 35 ports of the A600 may be configured to either Data Communications Equipment DCE or Data Terminal Equipment DTE via an internal 50 pin jumper Internal jumpers are also used for the selection of Clock Sources and Handshaking lines Possible A600 configurations are as follows 35 DCE to X 21 DTE in this configuration the X 21 Control Signal source is jumper selected between either V 35 Request To Send RTS or V 35 Data Terminal Ready DTR e 35 DTE to X 21 DCE in this configuration the X 21 Signal Timing source is jumper selected between either V 35 Serial Clock Transmit SCT or V 35 Serial Clock Receive SCR The physical layout of the ASeries A600 is as follows X 21 V 35 AL
7. of the X 21 port as either DTE or DCE via the 50 pin jumper please refer to Section 2 1 Pin A600 Port A600 Port o Name X 21 DTE X 21 DCE Mr CE as TT aa 1 E KA EN EI _ _ RTS NT ow 0 12 4 1 ex 5 2 A600 User Manual V 35 Interface Pin Assignments The direction of the signal lines depends on the selection of the V 35 port as either DTE or DCE via the 50 pin jumper please refer to Section 2 1 Name V 35 DTE V 35 DCE e moons CE swo ES RS z Note DTE external clock SCTE pair pins U and W is not supported by the A600 Pin o O g op J J ojojo BAS ARRE A600 User Manual 6 0 SPECIFICATIONS X 21 Port X 21 bis Select as DTE or DCE DB 15 female connector V 35 Port CCITT V 35 Compatible Select as DTE or DCE 34 pin V 35 female connector Front LED Indicators Clock Bi colour Red Green X 21 IND V 35 DCD Bi colour Red Green X 21 CTRL V 35 RTS Bi colour Red Green Receive Data X 21 and V 35 Bi colour Red Green Transmit Data X 21 and V 35 Bi colour Red Green Power Yellow Rear LED Indicators X 21 Port Status DTE or DCE Bi colour Red Green V 35 Port Status DTE or DCE Bi colour Red Green Power Supply 240V AC 50Hz Standard IEC male socket Dimensions 45mm x 120mm x 190mm Weight 920 grams Operating Temperature 0 to 40 C Stroage Temperature 20 to 70 C All specifications subject to change
8. tory default setting is V 35 SCT with jumpers in the TxCLK position RTS TxCLK wo co ql al amp Figure 2 2 A TE DTR RxCLK Selecting V 35 Handshaking Lines The X 21 interface Control line is used to drive the V 35 interface DTR or RTS handshaking lines The J205 jumper block has two positions to define which of the handshaking lines DTR or RTS is driven by the X 21 Control line The settings for J205 are shown in Figure 2 3 and are used in the following two situations a if the A600 is set for X 21 DCE and V 35 DTE then the jumper in J205 may be set for either DTR or RTS according to your requirements b if the A600 is set for X 21 DTE and V 35 DCE then the jumper in J205 must be set to the RTS position In both cases the line which is not selected is pulled to 12V via a 4 7KQ resistor The factory default for jumper J205 is the RTS position RTS TxCLK EBB Figure 2 3 S S S DTR RxCLK A600 User Manual 2 4 Front Panel LED Indicators The LED indicators in the A600 provide a function similar to that of a breakout box They show the level of the appropriate TTL signal rather than a level directly present on the communications line The signal names correspond to the port which is selected as DTE For example if the A600 is configured as X 21 DTE V 35 DCE and the RD LED is active then this refers to the activity on the X
9. without notice N42 DECLARATION OF CONFORMITY according to the European Commissions EMC Directive 89 336 EEC We Name of Manufacturer ALFATRON PTY LTD of Address of Manufacturer UNIT 9 36 NEW ST RINGWOOD VIC 3134 AUSTRALIA Australian Company Number ACN 005 410 819 declare under sole responsibility that the product Product Name ASeries X 21 to V 35 Interface Converter Model Number A600 to which this declaration relates is in conformity with the following standards CISPR 22 EN 55022 class B EMI from Information Technology Equipment ITE IEC 801 2 prEN55024 2 Electro Static Discharge Immunity IEC 801 3 prEN55024 3 Radiated RF Immunity IEC 801 4 prEN55024 4 Electrical Fast Transients Immunity
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