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User Manual Control Units

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Page 23 of 44

3.8.3. RS-422 Bi-directional Connection

A device controlled via RS-422 can be connected as described below.

S 5 - S 9 RS-422 Port Description

Pin 1 TX- Data - from Assistant or Assistant-S

Pin 2 TX+ Data + from Assistant or Assistant-S

Pin 3 RX+ Data + to Assistant or Assistant-S

Pin 4 RX- Data - to Assistant or Assistant-S

In B-

In A+

Signal Ground

Signal Output

1 432

Assistant or Assistant-S

S 5 to S 9

Controlled Device

RS-422

RX+

RX-

TX+

TX-

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