What the RX40C7-TS is on the BOM
The Mitsubishi RX40C7-TS is a PLC expansion module in the MELSEC iQ-R family, sitting alongside the iQ-R CPU and other rack-mounted I/O as a slot-in I/O or function block for the iQ-R backplane. It is filed as a PLC expansion module in the PLCs & HMIs category tree, which is the expected class for an iQ-R I/O or specialty slot and means it shares the rack mechanics and backplane bus with the surrounding iQ-R modules rather than standing alone.
Lifecycle posture
For a procurement buyer that means quoting to order against an RFQ is the normal supply path, with no immediate PCN-EOL pressure on the slot.
Where this class of module is used
PLC expansion modules in the iQ-R class are used to populate the I/O and specialty slots of an iQ-R rack — digital inputs, digital outputs, analog, high-speed counter, positioning, or communications — so the CPU's tag count and field-side wiring can be scaled to match the machine or line. An integrator pulling the RX40C7-TS onto a BOM line is extending an existing iQ-R assembly, and the module's fit, addressing, and configuration toolchain are those of the host rack rather than a standalone controller.