On the MT15-485, what does the A/Y and B/Z signify for RS485-B/Z, RS485-A/Y?

Pink is A/Y and Tan is B/Z which is only on readers that have been ordered with 485 configuration. MT15-485 is printed on every reader's sticker.

A/Y is negative or inverting pin, B/Z is the positive or non-inverting pin.


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