In a printing apparatus, verification of the correctness of a particular replaceable
module takes place before an operating element of the printing apparatus fully
engages the replaceable module. A printing apparatus coupler establishes a communication
link with a tag on the replaceable module as the replaceable module is being inserted
into the printing apparatus. The printing apparatus coupler receives module identifying
information from the tag. The coupler determines from the identifying information
whether the replaceable module is appropriate for that location in that printing
apparatus, and performs either an acceptance action to accept the replaceable module,
or a rejection action to reject the module.
