104
Connecting to the Host’s RS-232C Port
Section 5-1
5-1-3 1:N Connection between RS-422A/485 at the NT31/NT31C and
RS-232C at the Host
The connection method in which the RS-422A/485 ports of multiple NT31/NT31Cs
are connected to the RS-232C port of one host in a 1:N connection is described
here.
An RS-232C/RS-422A convertor unit (NT-AL001) is used to convert between the
RS-232C and RS-422A/485 communication methods.
NT31/NT31C
Serial port B
(RS-422A/485,
25-pin type)
Host link unit/CPU
CS1G/H
C200HX/HG/HE(-ZE)
25-pin connector
RS-232C/RS-422A
convertor unit
(NT-AL001)
9-pin connector
RS-422A/485 cable
(max. total length: 500 m)
RS-422A terminal
block
9-pin connector
RS-232C cable with
connectors
Max. 2 m
Relay terminal block
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