AMI 420 - RS-232;422 Connector; Table A-5 PC-To-Model 420 Connections for RS-232 Operation; Table A-6 PC (DB-9)-To-Model 420 Connections for RS-232 Operation

112 Rev. 7
Appendix
RS-232/422 Connector
A.7 RS-232/422 Connector
J12 is a 25-pin D-sub female connector.
Pin 1 of connector J12 is also connected to the Model 420 chassis ground.
Table A-5. PC-to-Model 420 connections for RS-232 operation.
PC (DTE)
DB-25 Pin
Model 420 (DCE)
DB-25 Pin
DTE
Function
22TD
33RD
44RTS
55CTS
66DSR
77GND
88DCD
20 20 DTR
22 22 RI
Table A-6. PC (DB-9)-to-Model 420 connections for RS-232 operation.
PC (DTE)
DB-9 Pin
Model 420 (DCE)
DB-25 Pin
DTE
Function
32TD
23RD
74RTS
85CTS
66DSR
57GND
1 8 DCD
420DTR
922RI
56
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56
6(5,$/3257