The present invention provides for a 1\xd7N optical switch having a switching component, an input, and a plurality of outputs formed in a single substrate. A parameter obtaining portion obtains both a cumulative number of printed sheets Pttl and a developer remaining amount Rt. The blocking member is slidable from a filling position, in which fluid communication between the interior and exterior of the valve housing is established through both primary and secondary openings, to a dispensing position, in which fluid communication between the interior and exterior of the valve housing is established only through the primary opening and not through the secondary opening. The control circuit configured to generate the first control signal and a second control signal indicating a valid or invalid status of each of the LTUs, in response to a data valid signal and the compare signal.