35
SRL 6-60 - Installation & Operating Manual -
819698-00
Start, operation, alarm and test
Monitoring
If the monitoring logic unit initiates Stop, data
transmission to the URS 60 / URS 61 safety
control unit is interrupted.
This means:
■
■
The URS 60 / URS 61 safety control unit
interrupts the safety circuit.
■
■
If a bypass was enabled, it is cancelled.
What to do if the mains power fails/returns
In the event of power failure, data transmission to
the control unit is interrupted.
This means:
■
■
The URS 60 / URS 61 safety control unit
interrupts the safety circuit.
■
■
If a bypass was enabled, it is cancelled.
Power failure during the interval time:
■
■
If a power failure occurs during the interval
time, when the power returns a check is
performed to establish whether the time of
next purging has been exceeded (system time
stamp).
■
■
If the time of next purging has been exceeded,
the standby time starts.
■
■
The interval time starts again from this point.
■
■
It must be synchronised with the desired time
once more by initiating the purging process.
Power failure during the standby time:
■
■
If a power failure occurs during the standby
time, when the power returns the command
“
Open safety circuit
” is sent to the URS 60 /
URS 61 safety control unit.
■
■
The purging process must be performed
immediately in order for the command to be
cancelled once more.
Power failure during the purge time
■
■
If a power failure occurs during the purge
time, when the power returns the command
“
Open safety circuit
” is sent to the control
unit.
■
■
The purging process must be resumed and
completed immediately in order for the com-
mand to be cancelled once more.
