Delta Tau PMAC Pack, Hardware Reference Manual

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PMAC-Pack
76 PMACPack Mating and Connectors
Table 6-14. JRS422 DB25 Connector
JRS232 DB9 Connector
Front View
Pin# Symbol Function Description Notes
1 CHASSIS GROUND Chassis Ground
2 RD- INPUT Receive Data Diff. I/O low true **
3 SD- OUTPUT Send Data Diff. I/O low true **
4 CS+ INPUT Clear To Send Diff. I/O high true **
5 RS+ OUTPUT Req. To Send Diff. I/O high true **
6 DTR BIDIRECT Data Term Read Tied to "DSR"
7 GND COMMON PMAC Common **
8 SDIO- BIDIRECT Special Data Diff. I/O low true
9 SCIO- BIDIRECT Special Ctrl. Diff. I/O low true
10 SCK- BIDIRECT Special Clock Diff. I/O low true
11 SERVO- BIDIRECT Servo Clock Diff. I/O low true ***
12 PHASE- BIDIRECT Phase Clock Diff. I/O low true ***
13 GND COMMON PMAC Common
14 S+5V OUTPUT +5Vdc Suuply Deactivated by "E8"
15 RD+ INPUT Receive Data Diff. I/O high true *
16 SD+ OUTPUT Send Data Diff. I/O high true *
17 CS- INPUT Clear To Send Diff. I/O low true *
18 RS- OUTPUT Req. To Send Diff. I/O low true *
19 INIT/ INPUT PMAC Reset Low is "reset"
20 DSR BIDIRECT Data Set Ready Tied to "DTR"
21 SDIO+ BIDIRECT Special Data Diff. I/O high true
22 SCIO+ BIDIRECT Special Ctrl Diff. I/O high true
23 SCK+ BIDIRECT Special Clock Diff. I/O high true
24 SERVO+ BIDIRECT Servo Clock Diff. I/O high true ***
25 PHASE+ BIDIRECT Phase Clock Diff. I/O high true ***
* Required for communications to an RS-422 host port
** Required for communications to an RS-422 or RS-232 host port.
*** Output on card @0; input on other cards. These pins are for synchronizing multiple PMACs together by
sharing phasing and servo clocks. The PMAC designated as card 0 (@0) by jumpers E40-E43 outputs clock
signals. Other PMACs designated as cards 1-15 (@1-@F) by jumpers E40-E43 take these signals as inputs. If
synchronization is desired, these lines should be connected even if serial communications is not used.