Module identity and channel count
The Omron NX-AD2603 is a 2-channel analog input module in the NX series, built to drop onto the same NX backplane as the rest of the family — two analog inputs on a single slice, DIN-rail mounted with spring-cage termination so the field wiring lands without a screwdriver cage or torque cycle beyond the standard ferrule prep. Per the datasheet, the module carries CE, cULus, C-Tick, KC, Lloyd, and NK approval marks, so the unit is acceptable for plant acceptance files that demand marine (Lloyd, NK), Korean KC, Australian C-Tick, and the North American cULus pair alongside the European CE — a broad envelope rather than a region-locked slice. Operating temperature spans 0°C to 55°C, which sets the cabinet thermal budget: anything inside an enclosure running warmer than 55°C ambient needs forced ventilation or a derating review against the module's own curve, not just the panel's nameplate.
Sourcing and production status
Sourced to order against an RFQ; package is bulk and quantity breaks track to the panel-builder's run size. Lifecycle stage is current and product status is Active.
Where it sits against its siblings
The closest in-class alternative is the NX-AD3203 — same NX-series form factor, same DIN-rail mount, same spring termination, same approval set, same operating envelope — but it carries 4 analog inputs on the same slice instead of 2. Drop-in compatibility with a panel specified around the NX-AD3203 is not guaranteed: the NX-AD3203 maps 4 channels into the NX I/O image where the NX-AD2603 maps 2, so the scan configuration and any spare-channel allocation in the ladder or tag database must be revisited even though the physical footprint, terminal pitch, and backplane keying are identical. A second 4-channel sibling, the NX-AD3603, sits in the same frame with the same approval and temperature envelope; if the cabinet is channel-dense and the application permits it, either 4-channel unit is the higher-density alternative to the NX-AD2603's 2-channel count. The NX-EC0222 shares the NX chassis but is a 2-channel digital counter module, not an analog input — it is not a functional cross for an analog application, and the comparison stops at the mechanical level.
Integration notes
Spring terminals accept the standard ferrule range used across the NX row, so a wireman already terminating other NX slices does not need to change strip length or ferrule size between modules on the same DIN segment.