Reliance Electric 57636-A Input Module is a 16-channel digital input card designed for the AutoMax PLC family, accepting 115V AC input signals (some listings note AC/DC compatibility) and carrying internal designation 61C501. Manufactured by Reliance Electric, this module is intended to plug into an AutoMax controller to bring 16 discrete field inputs into the processor. The 57636-A part number is matched with the 61C501 codification across supplier listings, and the unit is commonly encountered as a refurbished item in the market; multiple distributors note it as discontinued by the manufacturer.
