Switch/shutter actuator 8/4gang 16A RMD
75318003
Switch/shutter actuator 16/8gang 16A
RMD
75310002
Technical
Documentation
© Berker GmbH & Co KG 2007
Version: 04.04.2007
Part 5
(Subject to prior change)
75310002.doc
Seite: 41 / 174
Safety functions for outputs in shutter mode
The switching/shutter actuator can handle up to five different safety functions for the outputs in shutter
mode. Each safety function has a communication object of its own so that the functions can be activated or
deactivated independently of one another.
Three different wind alarms are available. These alarms can be used, for instance, to protect shutters or
awnings on several building facades from wind and gusts. In addition or as an alternative, a rain alarm, for
instance, as a protection for awnings, and a frost alarm as a protection against mechanical damage to
lowered shutters in low temperatures can be activated and used. The telegram polarity of the safety objects
is fixed: "0" = no alarm / "1" = alarm.
As a rule, the communication objects of the safety functions are controlled by weather stations which
monitor the temperature, the wind speed and the rainfall by means of sensors.
The safety functions are programmed and configured for all shutter outputs together. The different outputs
of the actuator can be separately assigned to all or to individual safety functions. Only assigned outputs
react to a change of state of the safety objects. The reactions at the beginning ("1" telegram) or at the end
("0" telegram) of an alarm message can be parameterized for specific channels.
As the outputs can also be assigned to several safety alarms, the priority of incoming alarm messages can
be preset for several channels. Thus, the three wind alarms have the same priority with respect to one
another (logic OR). The order of priority of the wind alarms with respect to the frost alarm or to the rain
alarm can be parameterized
The communication objects for the safety alarms can be monitored for the arrival of cyclical telegrams. If no
telegrams are received within a presettable time, the actuator activates the safety travel movement for the
outputs assigned. The safety function is terminated when a new "0" telegram is received.
For the wind alarms , the rain alarm and the frost alarm, different monitoring times between '1 minute' and
'23 hours 59 minutes' can be separately selected in the ETS. A common time is configured for the wind
alarms. Each wind alarm has its own timer so that the wind objects are separately checked for telegram
updates.
Object
"Rain alarm"
Object
"Frost alarm"
Object
"Wind alarm 1"
Object
"Wind alarm 2"
Object
"Wind alarm 3"
cyclical
monitoring
1)
1)
1)
1): Common monitoring time, different timers.
Priority evaluation
high --> medium --> low
1
Output 1
Outputs 3...4
Wind 1
Wind 2
Wind 3
Rain
Frost
cyclical
monitoring
cyclical
monitoring
cyclical
monitoring
cyclical
monitoring
Fig. 10: Function diagram of the safety function
