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8.1.3
Configure digital input
A selectable function can be controlled via the digital input.
Settings are made via the pump operating element. Select menu:
Ext. MAX
The pump switches between normal operation and override with a maximum setpoint.
Contact closed: Pump is running with maximum speed.
Contact open: Pump runs in the set operating mode.
Ext. MIN
The pump switches between normal operation and override with a minimum setpoint.
Contact closed: Pump runs at set, reduced speed (night setback).
Contact open: Pump runs in the set operating mode.
8.1.3.1 Ext. MIN set. Setting
Allows the setpoint to be adjusted when the Ext. MIN function is triggered via the digital input. Select menu:
44
Max setpoint (factory setting)
If a cable break is detected, the maximum setpoint is specified.
Min setpoint
If a cable break is detected, the minimum setpoint is specified.
No CB detection
No cable break reaction: if a cable break is detected (< 1 V), the
pump is switched off.
WCM BMS
Not used (factory setting)
The digital input is not active and does not influence the
pump's function.
Ext. OFF
The pump is switched on and off.
Contact closed: The pump runs in the set operating mode.
Contact open: The pump is switched off.
The pump kick function is active (see Section 6.4).
WCM BMS
The minimum speed depends on the respective pump.
It is possible that the achievable minimum speed is too low for
many applications. The setting via the Ext. MIN set. allows the
corresponding speed to be adjusted.
The figure is given as a percentage (%). The value specifies a
speed that reaches a percentage of the maximum delivery head
at zero volume flow.
Possible setting: 5% ... 50% in 5% steps.
Factory setting: 20%
Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
Digital input
Ext. MIN set.
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