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The ABB DSSS170 48970001-A is a digital station signal module for ABB Master control systems.
This module processes digital station signals in the documented ABB Master system rack. Confirm the rack position and signal class before selection.
Align the module with the documented ABB Master station position, signal class and connected field wiring before replacement.
Label the field connections, isolate the rack, restore the module and verify station diagnostics and signal states before service.
Engineering check: Confirm DSSS170 48970001-A is installed in the documented ABB Master rack position. Compare connector keying, station-signal wiring, common returns and digital signal polarity with the control drawings.
Acceptance test: Exercise each configured station input and output from the field terminal to the controller database. Verify state, channel order, isolation and alarm response, then confirm normal operation after a controlled rack restart.