What the CM-WDS monitors and how it fits
The ABB 1SVR430896R0000 is a CM-WDS cycle monitoring relay that detects pulse trains, missing pulses, or frequency deviations in a 24 V DC signal. It is specified for applications where a machine or process must confirm a repeating event — for example, a rotating shaft, a conveyor index, or a timed cycle — and trigger an alarm or shutdown if the cycle stops or drifts outside the set window. The measuring range spans 0.5 to 1000 ms, covering fast sensor pulses up to slow process cycles. The relay output is a single-pole double-throw (SPDT) contact rated for general-purpose switching.