What this module is on the NX rack
The Omron NX-AD3204 is an analog input module in the NX series — four differential channels on a DIN-rail slice that drops onto the same backplane used by the rest of the NX I/O family. It is rated for operation from 0 °C to 55 °C, so the cabinet thermal budget has to stay inside that ambient window for the module to hold its published accuracy. Termination is spring-cage on a standard NX slice, which keeps the wireman-side landing consistent with the rest of the NX wiring practice — same strip length, same cage, same DIN footprint as adjacent slices.
Approval coverage on the module — CE, cULus, C-Tick, KC, Lloyd and NK — covers the common export lanes a North-American or Asian skid build would normally hand to a parallel-import desk, without needing a country-specific variant on the BOM line. The module sits on the NX backplane and pulls in alongside other NX slices; no separate power supply slot is required beyond what the existing NX coupler or communication unit already supplies.
Sibling to weigh against inside the family
The closest same-family alternative is the NX-AD3208 — same NX-series analog input module, same DIN-rail and spring-termination form factor, same 0 °C to 55 °C envelope and the same multi-agency approval list, with the only decision-relevant difference being a higher channel count per slice.