Omron NT31 NT31C Benutzerhandbuch

A diagram showing the internal blocks of the convertor unit is shown below. Refer to this diagram when making
cables yourself, or when connecting devices with special interfaces.

SW1-6

Terminator

R

R

D-SUB 9P CASE

+5 V

SG

SD

RD

RS

CS

DR

ER

6

9

2

3

4

5

7

8

POWER
LED

RS-232C

Dr/Rec

RS-422A/485 Dr/Rec

DC-DC

IS_5 V

IS_0 V

FG

1

2

3
4

6

5

7
8

SW1-5

SW1-4

SG

SDB
SDA

RDB

RDA

CSB
CSA

SW1-2

RS-422A Dr

SW1-3

RS-232C side

Fuse

Convertor

RS-422A/485 side

8P terminal block

Photocoupler

2-wire type/
4-wire type

R

R

R

R

L

L

REG