Switch actuators RM 4 H, RM 8 H
4.5.3
Contact characteristics
Designation
Values
Description
Type of contact
NO contact
Standard:
The relay contact is closed when a switch-
on command is issued.
NC contact
Inverted:
The relay contact is opened when a switch-
on command is issued.
Status with download and
bus failure
After download or with bus voltage
failure…
OFF
..the relay switches off.
ON
..the relay switches on.
unchanged
…the relay remains in the same state as
before.
If several switching operations were
executed immediately before the
bus failure, the energy may not be
sufficient for an additional switching
operation.
In this case, the relay remains in its
previous state, regardless of the
parameter setting.
Status with restoration of
the bus supply
After return of bus voltage…
OFF
..the relay is switched off.
ON
..the relay switches on.
same as before
failure
…the relay remains in the same state as
before.
