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Appendix I
Connecting to an RS-232C/RS-422 Converter
Unit
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
OMRON PC
RS-232C
cable
(max. 2 m)
RS-232C/RS-422
converter unit, type
NT-AL001
RS-422A cable
(max. 500 m)
RS-232C/RS-422
converter unit, type
NT-AL001
RS-232C cable
(max. 2 m)
NT620S/NT620C
Wiring
S
Wiring of RS-232C cable
2
3
4
5
6
9
Pin No.
Abbrev.
SD
RD
RS
CS
+5V
SG
RS-232C
interface
Shielding
wire
PT or PC
NT-AL001
RS-232C
interface
3
4
5
6
9
SD
RD
RS
CS
+5V
SG
This connection is not possible
with NT620S/NT620C.
Connector
cover
2
Abbrev.
Pin No.
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.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
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