We just found out the same error. We use the IO-LC1 and the EX-A1, and got the EX-A2X as a DIRECT replacement, it is not. We have to use the directional cable with the new EX-A2X module. We have machines out in the field with the EX-A1 in them. Is there an adapter for the cable to make the EX-A2x work without rewiring the machines if there is a repair?
IS there a download of the different cable configurations between the EX-A1 and the EX-A2X?