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10.4
Configuration storage/data stor-
age
11
Communication interfaces:
Setting and function
11.1
Application and function of SSM
relay
Installation and operating instructions • Wilo-SiFresh • Ed.02/2023-08
The electronic module is equipped with a non-fading memory for saving the configuration.
If the mains supply is interrupted for any length of time, all settings and data are retained.
When power is restored, the pump continues to run with the default values that were
present before the interruption.
In the "Settings" menu
, select
1.
"External interfaces".
Possible selection:
External interface
‣ Function SSM relay
‣ Function control input (DI1)
‣ Function control input (DI2)
‣ Setting Wilo Net
Table 16: Selection "External interfaces"
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
1.
"External interfaces"
2.
"SSM relay function".
Possible settings:
Selection option
Only fault (factory setting)
Faults and warnings
Table 17: Function SSM relay
After confirming one of the selection options, the SSM trigger delay and SSM reset delay
are entered.
Setting
SSM trigger delay
SSM reset delay
Table 18: Trigger and reset delay
•
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.
Function SSM relay
SSM relay connects only in case of fault. Fault means:
System is not running.
SSM relay connects only in case of fault or a warning.
Range in seconds
0 s ... 60 s
0 s ... 60 s
en
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