Omron NT620S Operation Manual page 318

Connecting to an RS-232C/RS-422 Converter
By using an RS-232C/RS-422 converter unit (NT-AL001), RS-232C can be converted to RS-422A, allowing long-
distance communication of up to 500 m.
Connection Method
Wiring
S Wiring of RS-232C cable
RS-232C
interface
DIP Switch Settings
S DIP switch settings at RS-232C/RS-422 converter unit
Set the NT620S/NT620C memory switches in accordance with the communication method used.
Appendix I
RS-232C
cable
(max. 2 m)
RS-232C/RS-422
converter unit, type
NT-AL001
PT or PC
Abbrev. Pin No.
Connector
cover
SD 2
RD 3
RS 4
CS 5
+5V 6
SG 9
Shielding
wire
Unit
OMRON PC
RS-422A cable
(max. 500 m)
RS-232C cable
(max. 2 m)
NT-AL001
Pin No. Abbrev.
2
SD
3
RD
4 RS
5 CS
6
+5V
9 SG
This connection is not possible
with NT620S/NT620C.
RS-232C/RS-422
converter unit, type
NT-AL001
NT620S/NT620C
RS-232C
interface
315