Omron Programmable Terminals NT31 NT31C - Manual (Page 136)

5-2 Section Connecting to the Host’s RS-422A/485 Port
125
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.
NT31/NT31C
25-pin connector
9-pin connector
Serial port B
(RS-485, 25-pin type)
CPU
RS-485 cables
(max. total length 500 m)
CS1G/H
C200HX/HG/HE(-Z)E
CQM1H
24V DC PRINTER PORT B
Max. 2 m
Relay terminal block
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.
S Communication using the RS-485 type high-speed NT link (1:N) method is
possible only when a CS1W-SCB41 Serial Communications Board is installed
in a CS1 series CS1G/H.