User guide

60
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
23TD
32RD
47RTS
58CTS
66DSR
75GND
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
33TD
22RD
77RTS
88CTS
66DSR
55GND
11DCD
44DTR
99RI