Mitsubishi Absolute Encoder clarification

[MattB1284]

Okay I've got what I believe to be a faulty Encoder

Model - OSA104S2

We've found in our spare parts a similar Encoder

Model - OSA104S2A

I'm asking if these are interchangeable. I can't find anything online except for AliExpress listings for each model.

I would assume the addition of the "A" is just a different revision of the same Encoder.

Any help would be appreciated.