How to change OC-211 to OD-211 card.

[eblythe]

How do I changed CJ1W OC211 output card to a OD211 output card.

[Crossbow]

First, they are different wiring.  You will need to verify all of your wiring.  OC cards are relay output and OD are transistor.

Second, in the program in CX-Programmer, you will need to change the allocated module in the I/O Setup.  Once changed, you will have to download the updated project to the CPU.  If the connected modules and the program configuration do not match, the PLC will never run.