At The Host - Omron Programmable Terminals NT631 Setup Manual

Connecting to the Host's RS-232C Port
5-1-3 1:N Connection between RS-422A/485 at the PT and RS-232C at
the Host
86
Wiring for a Memory Link Connection
Prepare the adapter cable while referring to the diagram shown below.
NT-AL001 side
6
1
Abbreviation Pin number
FG
SD
RS-232C
RD
connector
RS
CS
+5V
SG
(9-pin type)
9
5
Since it is necessary to input a voltage of +5 V to the number 6 pin of NT-
AL001, supplying a voltage of 5 V from the host or an external voltage supply
for NT-AL001 is required.
The connection method in which the RS-422A/485 ports of multiple NT631/
NT631Cs are connected to the RS-232C port of one host in a 1:N connection
is described here.
An RS-232C/RS-422A Adapter (NT-AL001) is used to convert between the
RS-232C and RS-422A/485 communications methods.
RS-422A/485 cable
(max. total length: 500 m)
NT631/NT631C
NT631/NT631C
NT631/NT631C
Abbreviation
Connector
Connector
hood
hood
−
1
2
3
4
5
6
−
− 8
9
Shielding wire
No +5 V output is at the host side
A +5 V output is present at the host side
RS-232C/RS-422A
convertor unit
(NT-AL001)
RS-232C cable with
connectors
RS-422A terminal
9-pin connector
block
Serial port B
(RS-422A/485, terminal block)
Section 5-1
Host side
SD
RS-232C
RD
connector
RS
CS
+5V
SG
Host Link Unit or CPU Unit
CS/CJ-series PLC,
C200HX/HG/HE(-Z)E
9-pin connector