Connections To Serial Communications Option Boards; Connection Methods - Omron CP1H CPU Operation Manual

Connections to Serial Communications Option Boards

Connection Methods

Communications Modes and Ports
The following table shows the relationship between the communications ports and the communications modes
for the Serial Communications Option Boards.
Communications mode
Host Link
Serial PLC Links
Serial Gateway
No-protocol
1:N NT Link
Note (1) The NT-AL001 Link Adapter can be used to convert between RS-232C and RS-422A/485 to enable
1:N communications.
(2) Use 4-wire connections between Link Adapters.
Models of Serial Communications Option Board
Model
CP1W-CIF01 One RS-232C port
CP1W-CIF11 One RS-422A/485 port
CP1W-CIF12 One RS-422A/485 port
Note The CP1W-CIF11 is a non-isolated board, so the maximum transmission distance is 50 m. For distances
over 50 m, use the RS-232C port on the CP1W-CIF01 and then connect through the NT-AL001 Link
Adapter, which is isolated. Doing so will enable a maximum transmission distance of 500 m.
Reducing Electrical Noise for External Wiring
Observe the following precautions when wiring communications cables, PLC power lines, and high-power
lines. When multi-conductor signal cable is being used, avoid using I/O wires and other control wires in the
same cable.
• If wiring racks are running in parallel, allow at least 300 mm between the racks.
Communications
cables
PLC power supply
and general control
circuit wiring
Power lines
Appendix F
RS-232C
CP1W-CIF01
1:1 1:N
(See note 1.)
YES YES
(See note 2.)
YES YES
YES YES
YES YES
YES YES
Port
Low-current cables
300 mm min.
Control cables
300 mm min.
Power cables
Ground to 100 Ω or less.
CP1W-CIF11/CIF12
1:1 4-wire 1:N 4-wire
YES YES
YES YES
YES YES
YES YES
YES YES
Maximum transmission
distance
15 m
50 m (See note.)
500 m
RS-422A/485
1:1 2-wire 1:N 2-wire
No No
YES YES
YES YES
YES YES
YES YES
Connection method
Connector (D-sub, 9-pin female)
Terminal block (using ferrules)
Terminal block (using ferrules)
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