What the CS1W-AD161 is in the rack
The Omron CS1W-AD161 is a 16-channel analog input module that mounts on the CS Series backplane. It lands in a CS1W I/O slot the same way the surrounding digital and specialty modules do, which is the part of the decision an integrator locks in first when sizing a CS1 rack.
Channel density and signal class
Sixteen analog inputs on a single backplane slot is the headline density figure; the same CS1W form factor is shared by the 8-channel CS1W-PDC55, the 8-channel CS1W-PTS56, and the 4-channel CS1W-PTS02, so when a BOM line calls for fewer channels the spec-compatible siblings drop in without changing the slot or the screw-termination layout.
Panel-side fit
Backplane mounting with screw terminations keeps field wiring on a familiar Phoenix-style landing and lets the module share a row with other CS1W I/O on the same DIN segment. Operating range of 0°C~55°C covers the inside-envelope environment typical of a CS1 panel; storage extremes are wider, so the figure that governs a running cabinet is the operating span, not the handling limit.
Compliance marks on record
The approval marks listed for the module are CE and cULus; the procurement file is limited to CE and cULus certificates for this order code.
Sourcing posture
The module is carried in the CS1W I/O family and is sourced to order against an RFQ; quoted supply comes through the usual CS1W channel, with cross-shop against the same-form-factor peers above when channel count is the only swing variable.