Karel MS26s Installation & Maintenance Guide
Edition 3.1
17
Receiving 220 VAC over the mains, BBU38s generates –24 VDC and 8 VDC for
the system and accessories as well as 64 Vrms ring signal. The output of 8 VDC
is also regulated to 5 VDC by the MB26s motherboard.
By the help of BBU38s module, MS26s system can be backed up with a battery of
12 VDC in order to provide the continuity of the operation in case of mains failure.
For the cases where a battery is to be connected to the system, it is strongly
recommended to choose a dry battery for the proper operation.
The MS26s system that is equipped with a 12 V – 4 Ah battery can continue to run
for 4 hours under an average traffic of 35%.
BBU38s is also capable of charging the battery while the system power is on and
the system is running under low traffic. Besides, there exists a low voltage battery
cut-off circuitry, which turns itself off when the battery voltage goes below 8.5 VDC
and does not start until the battery voltage is above 11.5 VDC. So, preventing full
discharge of the battery BBU38s make the lifetime of the battery longer.
BBU38s module is protected by an F-type fuse of 1 A / 250 VAC on the mains input
and another F-Type fuse of 3.15 A / 12 VDC on the battery input.
The dimensions of the BBU38s are 24.5 cm x 13 cm x 8 cm and the weight is 1.5
kg.
II.7.
STANDARD TELEPHONE SETS – LADIN, FULYA
Any ordinary telephone set, may be DP or DTMF, can be connected to MS26s
system including KAREL’s own Ladin and Fulya telephone sets, which are both
DP/DTMF switchable.
The following figure illustrates the outlook of Ladin.
Summary of Contents for MS26S
Page 1: ...Karel MS26s T e l e p h o n e S y s t e m Installation Maintenance Guide Edition 3 1...
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Page 7: ...TECHNICAL REFERENCE...
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Page 33: ...INSTALLATION GUIDE...
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Page 42: ...Karel MS26s Installation Maintenance Guide Edition 3 1 34 Figure B 7...
Page 60: ...Karel MS26s Installation Maintenance Guide Edition 3 1 52 Figure B 27...
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Page 62: ...Design and specifications subject to change without notice...