A.4 rs-232/422 connector, Table a-2. pc (db-25)-to-model 187 connections for, Table a-3. pc (db-9)-to-model 187 connections for – American Magnetics 187 Self-Compensating Liquid Level Controller User Manual
Page 71: Appendix
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Appendix
RS-232/422 Connector
A.4 RS-232/422 Connector
Table A-2. PC (DB-25)-to-Model 187 connections for RS-232 operation.
PC (DTE)
DB-25 Pin
Model 420 (DCE)
DB-9 Pin
DTE
Function
2
3
TD
3
2
RD
4
7
RTS
5
8
CTS
6
6
DSR
7
5
GND
8
1
DCD
20
4
DTR
22
9
RI
Table A-3. PC (DB-9)-to-Model 187 connections for RS-232 operation.
PC (DTE)
DB-9 Pin
Model 420 (DCE)
DB-9 Pin
DTE
Function
3
3
TD
2
2
RD
7
7
RTS
8
8
CTS
6
6
DSR
5
5
GND
1
1
DCD
4
4
DTR
9
9
RI
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