Omron CJ2 CPU UNIT - General-Purpose External Devices (No-Protocol or Serial Gateway)

Appendices
A-124
CJ2 CPU Unit Hardware User’s Manual
This section describes the connection patterns and connections for using different ports in Serial Gate-
way Mode and No-protocol Mode. Up to 32 nodes can be connected for 1:N communications.
Note 1 The maximum cable length for an RS-232C connection is 15 m. RS-232C communications specifications,
however, do not cover transmissions at 19.2 Kbps. Refer to documentation of the device being connected
when using this baud rate.
2 The maximum total cable length including branch lines is 500 m for RS-422A/485.
3 The maximum cable length for connecting to the NT-AL001 is 2 m.
4 The maximum branch cable length is 10 m.
General-purpose External Devices (No-protocol or Serial Gateway)
Port
Connection
type
Diagram
RS-232C 1:1
RS-232C 1:N
RS-232C
I/F
RS-232C
NT-AL001
NT-AL001
NT-AL001
RS-232C
I/F
RS-422A/485
RS-232C
RS-422A/
485 I/F
RS-422A/485
RS-232C
Terminating
resistance ON
+5 V required
Terminating
resistance ON
Terminating
resistance ON
RS-422A/485 I/F
NT-AL001
RS-232C RS-422A/485
NT-AL001
RS-232C
RS-422A/
485
B500-AL001
NT-AL001
RS-232C
RS-232C
RS-232C
RS-232C
RS-422A/485
NT-AL001
RS-422A/485 I/F
RS-232C I/F
Terminating
resistance ON
+5 V required
Terminating
resistance ON
Terminating
resistance ON
Terminating
resistance ON
Terminating
resistance ON
Terminating
resistance ON