Karel MS128 Installation & Maintenance Guide
Edition 3.2
76
•
C
ABLING
:
The connection to the external relay should be made through the 2-pin XREL
connector on the MS128 CPUKON card. 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.
Summary of Contents for MS128
Page 1: ...Karel MS128 T e l e p h o n e S y s t e m Installation Maintenance Guide Edition 3 2...
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Page 47: ...INSTALLATION GUIDE...
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Page 90: ...Design and specifications subject to change without notice...