What it is on the BOM
The Mitsubishi FX5-C32ET/DSS-TS is a 32-point PLC expansion module carrying Ethernet communication and a terminal-strip wiring interface, listed under PLCs & HMIs as a PLC Expansion Module sub-category line. It sits in the iQ-F family footprint as an add-on slice to the FX5 CPU, addressed and powered from the host backplane so the panel-side wiring stays at the terminal-strip row rather than a dedicated comms drop.
Where the class is used
PLC expansion modules of this kind extend a base CPU's digital I/O count on a factory-floor cell where the local machine needs more discrete points than the CPU alone supplies, while keeping the Ethernet link to the SCADA layer on the host.
Sourcing posture
Lifecycle stage is recorded as current on the line card, so the BOM entry is specified against active supply and quoted to order through the RFQ desk — no last-time-buy window applies.