Connecting With Rs-422A Converters - Omron CJ2 CPU UNIT User Manual

Appendices
CPU Unit
Signal
name
RS- SDA−
422A/485
SDB+
Option
RDA−
Board
RDB+
FG
4-wire
Terminal block
Terminating
resistance: ON
Serial PLC Links for OMRON CJ2M, CJ1M, CP1H, CP1L, and CP1E
PLCs
Examples of connections to use Serial PLC Links are provided below. The Serial PLC Link communica-
tions mode is used.

Connecting with RS-422A Converters

CJ2M CPU Unit (Polling Unit)
CJ1W-CIF11 RS-422A
Converter
Note The CJ1W-CIF11/CP1W-CIF11 is not isolated. The maximum transmission distance is therefore 50 m.
If the distance exceeds 50 m, use the isolated CP1W-CIF12, or the NT-AL001.
Do not use the CJ1W-CIF11/CP1W-CIF11 in the transmission path. If you use the NT-AL001 and CP1W-
CIF12, the maximum total transmission distance will be 500 m.
A-130
NT-AL001 Link Adapter
Pin
No.
Pin Signal
3 name
No.
4 1 GRD
RS-422A
1 2 SG
2 3 SDB
5 4 SDA
5 RDB
6 RDA
7 CSB
Shield
8 CSA
RS-422
Terminal block
DIP Switch: Pin 2:
OFF (terminating
resistance); Other
pins are the same
as below.
NT-AL001 Link Adapter
Pin Signal
No. name
1 GRD
2 SG
3 SDB
4 SDA
5 RDB
6 RDA
7 CSB
Shield
8 CSA
RS-422
Terminal block
DIP Switch Settings
Pin 1: ON
Pin 2: ON
(terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: ON
CJ2M CPU Unit (Polled Unit 0)
Pin
Signal Signal
Shield
No.
name name
RS-232C
NC 1 FG
SD 2 SD
RD 3 RD
RS 4 RS
CS 5 CS
5V 6
DR 7 DR
ER 8 ER
SG 9 SG
RS-232
(+)
D-sub, 9-pin
(–)
connector (male)
Signal Signal
Pin
Shield
name name
No.
RS-232C
NC 1 FG
SD 2 SD
RD 3 RD
RS-232C
RS 4 RS
Interface
CS 5 CS
5V 6
DR 7 DR
ER 8 ER
SG 9 SG
RS-232
(+)
D-sub, 9-pin
(–)
connector (male)
RS-422A/485
Option Board
Serial PLC Link (maximum
total distance: 50 m)
CJ2 CPU Unit Hardware User's Manual
RS-232C
Interface
5-V
power
5-V
power
CJ1M CPU Unit (Polled Unit 1)
RS-232C port
built into CPU
Unit
CJ1W-CIF11 RS-422A
Converter