B&B Electronics OP10 - Manual User Manual

Page 8

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COM1:

Pin

Definition

Explanation

1

TX+

422 send positive signal

2

RX

232 receive signal

3

TX

232 send signal

4

NC

Interior used, can not be

connected with GND

5 GND

0

level

6

TX-

422 send negative signal

7

VCC

5V high level

8

RX-

422 receive negative signal

9

RX+

422 receive positive signal

RS485:

5