Omron CP1H CPU Operation Manual page 730

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Connections to Serial Communications Option Boards

(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. The

CP1W-CIF12 is an isolated board, so the maximum transmission distance is 500m. For distances

over 50 m, use the RS-422A/485 port on the CP1W-CIF12 directly, or 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.

(3) The maximum cable length is limited to 2 m when an NT-AL001 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 RS-232C and RS-422A/485 Wiring for actual wiring methods.

Schematic diagram

Resistance ON

B500-AL001-E

Resistance ON

Resistance ON

Resistance ON

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