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8.1.4
Relay function
The changeover contact relay outputs operating states of the pump depending on the set signal function.
Select menu:
SSM err & warn
Faults and warnings are output as collective fault signals.
The signal is tapped via the COM and NC connections.
The contact opens in the event of a fault or warning message.
The pump does not necessarily switch off; depending on the warning state, it continues to run with reduced
performance. The lack of voltage is not output as a fault or warning here.
SBM motor op.
The operation of the motor is output as a collective run signal.
The signal is tapped via the COM and NO connections.
The contact closes when the motor is running.
The contact opens when the motor is switched off, faults occur and there is no voltage.
SBM ready op.
The pump's operational readiness is output as a collective run signal.
The signal is tapped via the COM and NO connections.
The contact closes when the pump is ready for operation.
The contact opens when there is no voltage and no faults.
SBM power ready
The operating voltage is output as a collective run signal.
The signal is tapped via the COM and NO connections.
The contact closes when operating voltage is applied.
The contact opens when there is no voltage.
8.1.4.1 Set relay signal delay
The output of the SSM/SBM signals about the states of the pump can be delayed.
Relay active delay
Active delays are used to prevent processes from being influenced by very short errors, warnings or changes
in operating states. Select menu:
Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
WCM BMS
Relay function
Not used
The relay output is not active and does not output any operat-
ing states.
The contact between COM and NC remains permanently closed,
but open between COM and NO.
SSM only errors (factory setting)
Only faults are output as collective fault signals.
The signal is tapped via the COM and NC connections. The con-
tact opens in the event of a fault and the pump stops.
The lack of voltage is not output as a fault here.
WCM BMS
R. active delay
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