The only difference between the COM400 in a door lock (AD400) and the COM400 in a wall mounted interface module is the MCX jack, which is provided for the optional remote RF antenna when needed on non-lock devices (WRI400, PIM400, GCK400 and E.
The COM400 has only two versions of FW, 2.2a and 2,2d and they are cross compatible and completely functional with all AD-Series wireless devices. There is no reason to change a FW 2.2a to a FW 2.2d.
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