Application and function of SSM relay
The contact of the collective fault signal (SSM, potential-free changeover contact) can be connected to a building automation system. The SSM relay can either switch on only in case of fault or for faults and warnings.
- When the pump does not have electricity or if there is no fault, the contact between the terminals COM (75) and OK (76) is closed. The contact is open in all other cases.
- If there is a fault, the contact between the terminals COM (75) and Fault (78) is closed. It is open in all other cases.
In the “Settings” menu 
, select
- “External interfaces”
- “SSM relay function”.
Possible settings:
Selection option | Function SSM relay |
|---|---|
Only fault (factory setting) | SSM relay connects only in case of fault. Fault means: The pump is not running. |
Faults and warnings | SSM relay connects only in case of fault or a warning. |
After confirming one of the selection options, the SSM trigger delay and SSM reset delay are entered.
Setting | Range in seconds |
|---|---|
SSM trigger delay | 0 s … 60 s |
SSM reset delay | 0 s … 60 s |
- Triggering of the SSM signal after occurrence of a fault or a warning is delayed.
- Resetting of the SSM signal after occurrence of a fault or a warning is delayed.
Trigger delays are used so that processes are not influenced by very short fault or warning messages.
If a fault or a warning is fixed before the end of the set time, there will be no message to SSM.
A set SSM trigger delay of 0 seconds immediately reports faults or warnings.
If an error message or warning message occurs only for a brief duration (e.g. in case of a loose contact), the reset delay prevents the SSM signal from fluttering.
NOTICE
SSM trigger and SSM reset delay is set to 5 seconds as a factory setting.
- SSM/ESM (collective fault signal/individual fault signal) in twin-head pump operation:
- The SSM function must preferably be connected to the main pump. The SSM contact can be configured as follows:
- the contact reacts either only in the event of a fault or in the event of a fault and a warning.
Factory setting SSM only reacts in the event of a fault.
Alternatively or additionally, the SSM function can also be activated on the standby pump. Both contacts work in parallel. - ESM: The ESM function of the twin-head pump can be configured on each head of the twin-head pump head as follows: The ESM function on the SSM contact only signals faults of the respective pump (individual fault signal). In order to record all faults of the two pumps, both contacts must be assigned.