Communications module for CJ Series racks
The CJ1W-CORT-21: It handles the serial or fieldbus link between the CPU and remote I/O or drives — the type of communications protocol is not specified in this listing, so confirm the network interface matches your existing CJ backplane and field wiring before specifying.
The CJ1W-CORT-21 carries an eol_hot lifecycle stage — the manufacturer has flagged it as end-of-life, though the product status is still listed as Active. That means it remains orderable for now but the clock is running.