Omron CP1L CPU UNIT - 06-2007 Operation Manual page 623

Connections to Serial Communications Option Boards
Port Configu-
ration
RS-422A/ 1:1
485
RS-422A/ 1:N
485
Resistance
ON
Resistance
ON
Resistance
ON
Note (1) The maximum cable length for RS-232C is 15 m. The RS-232C standard, however, does not cover
baud rates above 19.2 Kbps. Refer to the manual for the device being connected to confirm support.
(2) The CP1W-CIF11 is a non-isolated board, so the maximum transmission distance is 50 m. For dis-
tances over 50 m, use the RS-232C port on the CP1W-CIF01 and then connect through the NT-
AL001-E Link Adapter, which is isolated. Doing so will enable a maximum transmission distance of
500 m.
(3) The maximum cable length is limited to 2 m when an NT-AL001-E Link Adapter is connected.
(4) Branch lines must be a maximum of 10 m long.
Connection Examples
The connection examples in the remainder of this section show only the basic connection diagrams. We rec-
ommend that appropriate noise countermeasures be taken in actual applications, including the use of shielded
twisted-pair cables. Refer to 3-4 RS-232C and RS-422A/485 Wiring for actual wiring methods.
590
Schematic diagram
RS-422A/485
interface
RS-422A/485
RS-232C
interface
NT-AL001-E RS-232C
RS-422A/485 Resistance ON
5-V power
RS-422A/485
B500-AL001-E
RS-422A/485
NT-AL001-E
RS-232C
RS-232C
RS-422A/485
RS-232C
Resistance ON
5-V power
RS-422A/485
interface
Resistance ON
RS-422A/485
interface
Resistance ON
RS-232C
interface
Appendix F