Karel MS48 Installation & Maintenance Guide
Edition 3.2
53
III.6. EXTERNAL ANNOUNCEMENT SYSTEM
• C
ABLING
:
Any external announcement system can be connected to MS48 system
through the doorphone socket on MB48 motherboard. For making this
connection, the free end of the cable (with 4-pin connector) should be passed
through the cable hole on the panel at the down left corner of the system
cabinet (the panel on which the system ON/OFF switch resides) and then
attached to the doorphone socket on the MB48 motherboard. The following
figure illustrates the installation.
Figure B-21
MS48 system is enhanced with a facility, which provides the efficient use of
your amplifier by way of its external relay (see section III.13). The external relay
of MS48 system can be used to switch the power of the amplifier of the
announcement system. For this, the power of the amplifier must be connected
through the external relay on MB48 motherboard and the system must be
programmed accordingly.
The following figure is to give an idea about these connections.
Figure B-22
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