Omron NT620S Operation Manual page 62

Connection to a PC by the NT Link (1:N)
Connection Diagram
RS-232C cable
(max. length: 2 m),
or directly
connected
RS-422A/485 cable
RS-232C/RS-422 converter
unit, type NT-AL001
(Not required if the
connection is made at the
RS-422A/485 port of the
communication board.)
Reference
As shown in the figure below, connect multiple NT620S/NT620C units to one PC
via RS-232C/RS-422 converter units. In an NT link (1:N), up to eight NT620S/
NT620C units can be connected to one PC port.
C200HX/HG/HE
OMRON PC
While controlling machinery and monitoring
lines, controls the NT620S/NT620C units
when necessary.
C200H/HG/HE can be used.
RS-422A/485 cable (*)
NT620S/NT620C
[Maximum Number of NT620S/NT620Cs Connectable to One Port]
The maximum numbers of NT620S/NT620C units that can be connected to the
built-in RS-232C port of the CPU and ports A and B of the communication board,
respectively, are as follows.
S C200HE
S C200HG, C200HX
When connecting the C200HX/HG/HE and an RS-232C/RS-422 converter unit,
use a converter unit whose lot number is 15Y5 or higher. Converter units of lot
numbers previous to 15Y5 cannot be connected.
RS-232C/RS-422 RS-232C/RS-422
converter unit, converter unit,
type NT-AL001 type NT-AL001
RS-422A/485 cable (*)
RS-232C cable
(max. length: 2 m)
NT620S/NT620C
(Up to eight NT620S/NT620C units can be connected.)
:Up to 4 NT620S/NT620C units per port (unit Nos. 0 to 3)
:Up to 8 NT620S/NT620C units per port (unit Nos. 0 to 7)
Section 2-7
RS-232C cable
(max. length: 2 m)
(*) Total cable length: 500 m
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