Serial comm module for the iQ-R backplane
The Mitsubishi LJ71C24-R2-CM sits on the MELSEC iQ-R backplane as a serial communication module, rated for up to 230.4 kbps.*1 That figure holds the line for most point-to-point protocols, provided the baud-rate configuration matches the remote device's capability — a mismatch on parity or stop bits will drop the link, not the controller.
Sourcing posture
The module's lifecycle is current, so it remains a first-line BOM entry. Lead time is quoted at 1–10 working days per the supplier's channel; actual availability varies with open-order position, so an RFQ against a specific quantity locks the slot. For a second-source review, the closest parametric peer is the LJ71C24-CM, but the -R2 difference means the buyer must confirm the interface before committing the line. No other peer listed (LJ71E71-100-CM, LJ71GF11-T2-CM) serves the same serial function; those are Ethernet and fiber modules respectively.