Description
GM7U-flavored 40-point mixed I/O module: 24 DC inputs + 16 relay outputs, packaged for the U-series rack and spare compatibility.
The Polar Energy Assessment:
The G7M-DR40U is the U-series variant of the 40-point mixed I/O module, offering the same 24 DI / 16 relay DO capability as the DR40A but in the GM7U-compatible form factor and mapping. It’s useful when swapping spares on GM7U machines or standardizing a panel build around the U family. Distributor listings frequently show the DR40U as a discontinued but commonly encountered spare, so check stock status before promising delivery.
Pros
- Same high channel count, but U-series mapping makes field swaps simpler on GM7U racks.
- Relay outputs preserve isolation for AC loads.
Limitations
- Some U-series SKUs are discontinued / end-of-life in certain markets; verify availability.
- Ensure CPU mapping/firmware compatibility when mixing U and non-U modules.
Typical use cases
- Brownfield GM7U replacement projects, consolidated discrete I/O racks for mid-sized equipment, and panels where U-series part numbering is required.

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