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The ABB SPDSM04 is a 8-channel pulse input module for the Symphony Plus Harmony platform. It measures frequency, period, pulse duration, and accumulated counts from isolated field inputs.
The ABB SPDSM04 is documented with eight independent optically isolated inputs, maximum input frequency 50 khz, 5/24 v contact or 50 mvpp to 10 vpp signals. These characteristics define the signal, network, or control role that must be matched during replacement.
The ABB SPDSM04 requires compatible ABB rack, backplane, termination, wiring, and configuration resources. Verify the complete model, field signal requirements, and lifecycle path before installation.