Appendices
General-purpose External Devices (No-protocol or Serial Gateway)
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.
Port
RS-232C
RS-232C
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.
A-124
Connection
type
1:1
1:N
Diagram
RS-232C
RS-232C
I/F
NT-AL001
RS-232C
RS-422A/485
Terminating
resistance ON
NT-AL001
RS-232C
RS-422A/485
Terminating
resistance ON
RS-422A/485 I/F
NT-AL001
RS-232C
RS-422A/485
Terminating
resistance ON
RS-422A/485 I/F
NT-AL001
B500-AL001
RS-232C
RS-422A/
485
Terminating
resistance ON
NT-AL001
NT-AL001
RS-232C
RS-232C
Terminating
resistance ON
RS-422A/485
RS-232C
RS-232C
Terminating
resistance ON
+5 V required
CJ2 CPU Unit Hardware User's Manual
NT-AL001
Terminating
resistance ON
+5 V required
RS-232C
I/F
RS-422A/
485 I/F
Terminating
resistance ON
Terminating
resistance ON
RS-232C I/F