What the CS1W-AT211 Does in a CS1 Rack
The Omron CS1W-AT211 is an I/O terminal block conversion unit for CS1-series PLCs — it adapts the rack's backplane connector to a field-wiring terminal block, saving the cost of a full remote I/O rack when you only need a few points terminated locally.
Lifecycle Reality: EOL Hot — What That Means for Your BOM
The CS1W-AT211 carries an EOL Hot lifecycle status — the manufacturer has notified end-of-life, so supply is narrowing to independent-distribution and surplus channels. No official successor order code exists for this unit. If your CS1 rack still needs this conversion block, sourcing through an independent distributor who can pull from multiple surplus inventories is the realistic path. For a line-down situation, confirm the exact CPU model and slot position — the conversion block's terminal assignment must match the I/O module it serves.