Channel count and peer comparison
If your panel drawing calls out an NX-TS3101, that part is a 4-channel version of the same module. The NX-TS2101 delivers two thermocouple inputs instead of four, but drops into the same NX slice slot, uses the same spring-terminal wiring, and shares the same DIN-rail footprint. No backplane or power supply changes needed—just a different I/O map entry. The 4-channel sibling is better when you need to pack more temperature loops into a single slice; the 2-channel version suits smaller or distributed zones.
Approvals and compliance documentation
The NX-TS2101 carries CE, cULus, C-Tick, KC, Lloyd, and NK approvals. That covers most industrial control panels shipping to North America, Europe, Australia, South Korea, and marine applications. RoHS or REACH declarations are not in the available spec data—expect those from the manufacturer upon request. For a procurement file, these listed marks satisfy common inspection demands without additional paperwork.