Karel MS224 Installation & Maintenance Guide
Edition 3.2
9
SPS224 – BPL224 Connector
Pin Signal
Pin Signal
1
- 24 VDC
6
GNDCPU
2
GND
7
- 5 VDC
3 GND
8 GND
4
+ 12 VDC
9
+ 5 VDC
5
+ 5 VCPU
10
64 Vrms (Ring)
MS224 system can be backed up with a battery of 24 VDC in order to provide the
continuity of the operation in case of mains failure. Hence, SPS224CR has
necessary circuitries for battery backup. It is strongly recommended to use a dry
battery for proper operation of the system, as the system does not have embedded
power failure transfer stations. Also a 24 V - 15 Ah battery is recommended for a
full capacity system with an average traffic of 35%.
There exists one F-type fuse of 8 A / 24 VDC for battery. The battery input is also
controlled by the battery ON/OFF switch, which enables the user to put the battery
out of service when necessary.
SPS224CR 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
17 VDC and does not start until the battery voltage is above 23 VDC. So,
preventing full discharge of the battery SPS224 makes the lifetime of the battery
longer.
The Power Status LEDs on the front panel of the SPS224 Power Supply Module
help to identify the power source in use on time. There are three LEDs. One is for
220 VAC and the others are for -24 VDC and +5 VDC. Normally when the system is
fed from the mains all three LEDs are on. The 220 VAC LED turns off when the
mains power is off. In this case - 24 VDC and + 5 VDC LEDs stay on, if battery
backup is available for the system.
Through the power info panel on the front cover of the system cabinet, it is possible
to access mains and battery ON/OFF switches or to observe the power status
LEDs, without opening the front cover.
The dimensions of the SPS224 are 8 cm x 25.5 cm x 25 cm and the weight is 3.1
kg (including SPS224CR).
The dimensions of the SPS224CR are 20 cm x 20.5 cm x 6 cm and the weight is
1.1 kg.
I.4.
CENTRAL PROCESSING MODULE – CPU224 &
CPU CONNECTION CARD - MS224 CPUKON
CPU224 Central Processing Module is located on the rightmost plastic card slot
inside the cabinet. The board is attached to the CPU connector on the BPL224
Backplane (see Figure A-4) and fixed to the top and bottom front parts of the metal
rack via the locks on the plastic card cover.
Summary of Contents for MS224
Page 1: ...Karel MS224 T e l e p h o n e S y s t e m Installation Maintenance Guide Edition 3 2...
Page 5: ......
Page 23: ......
Page 43: ......
Page 47: ......
Page 52: ...Karel MS224 Installation Maintenance Guide Edition 3 2 49 Figure B 4 Figure B 5...