American Magnetics 420 Power Supply Programmer - Manual (Page 131)

Rev. 7 113
Appendix
RS-232/422 Connector
Table A-7. EIA-530 Device-to-Model 420 connections for RS-422 operation.
EIA-530 Device (DTE)
DB-25 Pin
Model 420 (DCE)
DB-25 Pin
DTE
Function
2 21 TX
−
3 16 RX
−
4 12 RTS
−
5 13 CTS
−
6 11 DSR
−
7 7 GND
8 14 DCD
−
10 8 DCD+
13 5 CTS+
14 2 TX+
16 3 RX+
19 4 RTS+
20 15 DTR
−
22 6 DSR+
23 20 DTR+