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Karel MS48 Installation & Maintenance Guide
Edition 3.2
10
I.2.B. POWER FAILURE TRANSFER STATIONS
In case of power failure the stand-by battery backup allows the system resume
operation without any interrupt.
In case there is no battery connected to the system when the power goes off, the
lines on the MB48 motherboard and EXP48 (4/12) module are automatically
connected to first 4 extensions of the same board. The same also applies to EXP48
(2/6), such that the lines on EXP48 (2/6) module are connected to the first 2
extensions of the same board, in case of power failure.
See the following figure illustrating the power failure transfer stations of MS48
(10/30) system.
Figure A-7
I.3.
EXTERNAL MUSIC CONNECTOR
Any external music source (tape recorder, radio or CD player) can be connected to
the system to be used for background music facility and to be transmitted to the
external parties parked or put on hold. This connection is established via the 2-pin
music connector on the MB48 motherboard.
I.4.
EXTERNAL RELAY
An external relay which is rated for 250 VAC - 24 VDC at a maximum current of 2 A
exists on the MB48 motherboard to be used to activate either a door opener, an
external ringer, an external music source or an external announcement system.
The connection to the external relay is established through the 2-pin relay
connector on the MB48 motherboard. The selection among these devices is made
by programming.
Содержание MS48
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