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I/O Module, Series C Digital AC Output, 4 Non-Isolated Channel, Current Sourcing, DIN Rail, Open StyleBulletin 1734 POINT I/O™ modules offer digital, analog, and specialty I/O, as well as POINT Guard safety-rated I/O, with one to eight points per module. You can mix standard and safety I/O in the same system. Comprehensive diagnostics and configurable features make POINT I/O easy to apply