Application and function of SBM relay
The contact of the collective run signal (SBM, potential-free normally open contact) can be connected to a building automation system. The SBM contact signals the operating status of the pump. The SBM relay can either switch on for “Motor in operation”, “Ready for operation” or for “Power supply ready”.
- When the pump is running in the set operating mode and based on the next settings, the contact between the terminals COM (85) and RUN (88) are closed.
In the “Settings” menu 
, select
- “External interfaces”
- “SBM relay function”.
Possible settings:
Selection option | Function SSM relay |
|---|---|
Motor in operation (factory setting) | SBM relay connects only when motor is running. Closed relay: The pump is supplying. |
Power supply ready | SBM relay connects for power supply. Closed relay: Voltage available. |
Ready for operation | SBM relay connects when there is no fault. Closed relay: Pump can supply. |
NOTICE
From SW ≥ 01.05.10.00, the following behaviour applies:
if SBM is set to “Motor in operation”, the SBM relay switches when No-Flow Stop is active.
If SBM is set to “Ready for operation”, the SBM relay does not switch when No-Flow Stop is active.
After confirming one of the selection options, the SBM trigger delay and SBM reset delay are entered.
Setting | Range in seconds |
|---|---|
SBM trigger delay | 0 s to 60 s |
SBM reset delay | 0 s to 60 s |
- Triggering of the SBM signal after changing an operating status is delayed.
- Resetting of the SBM signal after changing the operating status is delayed.
Trigger delays are used so that processes are not influenced by very brief changes in the operating state.
If an operating state change can be reversed before the end of the set time, the change is not reported to the SBM.
A set SBM trigger delay of 0 seconds reports an operating state change immediately.
When an operating status change occurs only for a short duration, the reset delay prevents a flutter of the SBM signal.
NOTICE
SBM trigger and SBM reset delay is set to 5 seconds as a factory setting.
SBM/EBM (collective run signal/individual run signal) in dual-pump operation
- SBM: The SBM contact can be assigned to any of the two pumps. Both contacts signal the operating status of the twin-head pump in parallel (collective run signal).
- EBM: The SBM function of the twin-head pump/two-pump system can be configured so that the SBM contacts signal only operational messages of the respective pump (individual run signal). In order to record run signals of both the pumps, both contacts must be assigned.