Module identity and slot role
The Mitsubishi RX40PC6H is an expansion module in the MELSEC iQ-R PLC family, sitting in the I/O rack alongside the CPU and other slice-style modules on the same backplane.
What it does in the rack
As an iQ-R expansion slot, the module extends the CPU's point count and function set without changing the rack architecture — addressing, scan time, and backplane power budget stay governed by the host CPU, not by the slice itself.
Sourcing posture
With the part on a current lifecycle stage, the supply path is a standard factory-channel quote against an RFQ — priced and shipped against the BOM line, with no special handling for obsolescence or allocation.