Karel MS48 Installation & Maintenance Guide
Edition 3.2
65
• C
ABLING
:
The connection to the external relay should be made through the 2-pin relay
connector at down right corner of the MB48 motherboard. The following figure
illustrates the connection of the relay to an external device.
Figure B-34
WARNING
When the mains power goes off and on, if no battery backup is available for the
system, the external relay may be activated for a very short while which may cause
an undesired activation of the device that is connected to the relay.
This may be especially important for the security of the building if a door opener is
connected to the relay. Therefore during the installation please make sure that no
undesired operations occur.
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