Omron NT31 NT31C manual 5 1N Connection among RS-485 Ports

Connecting to the Host’s RS-422A/485 Port Section 5-2

5-2-5 1:N Connection among RS-485 Ports

The connection method in which the RS-485 ports of multiple NT31/NT31Cs and one host are connected in a 1:N connection is described here.

CPU

NT31/NT31C

Serial port B (RS-485, 25-pin type)

25-pin connector

Relay terminal block

Max. 2 m

CS1G/H C200HX/HG/HE(-Z)E CQM1H

9-pin connector

RS-485 cables

(max. total length 500 m)

24V

DCPRINTER PORT B

Reference: S Communication using the RS-485 type standard NT link (1:N) method is pos- sible only when a CS1W-SCB41 Serial Communications Board is installed in a CS1 series CS1G/H, a Communications Board is installed in a C200HX/HG/ HE(-Z)E, or a CQM1H-SCB41 Serial Communications Board is installed in a CQM1H.

SCommunication using the RS-485 type high-speedNT link (1:N) method is possible only when a CS1W-SCB41 Serial Communications Board is installed in a CS1 series CS1G/H.

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