Table a-4. eia-530 device-to-model 187 connections, Appendix – American Magnetics 187 Self-Compensating Liquid Level Controller User Manual

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Appendix

RS-232/422 Connector

Table A-4. EIA-530 Device-to-Model 187 connections for RS-422 operation.

EIA-530 Device (DTE)

DB-25 Pin

Model 420 (DCE)

DB-9 Pin

DTE

Function

2

9

TX

−

3

1

RX

−

4

7

RTS

−

5

8

CTS

−

13

6

CTS+

14

3

TX+

16

2

RX+

19

4

RTS+