CSE Kingfisher PLUS+, Hardware Reference Manual

Page: 77 / 89

Superseded Hardware Manual 7.12 Page 77
1.29 P S -11: AC S u p p ly In p u t 100 to 240 VAC
FEATURES
Monitoring - battery and input supply AC Input Supply
Redundancy - two or more power
supplies per backplane
DC Input Supply
Isolated DC Output Low Voltage Battery Protection
The PS-11 power supply provides AC to DC conversion for the backplane, battery and radio (or an
external device), a monitoring processor and an optional isolated 24 VDC output.
Fire Risk
CAUTION
A supply voltage outside the specified limits may cause fire.
Electrical Hazard
CAUTION
Only appropriately qualified and trained personnel can install and service this
equipment.
Mains Power must be connected in accordance with local national wiring rules and
regulations. Building installation shall provide appropriate short-circuit backup protection.
Always remove input mains voltage (by disconnecting power cord from the mains power
outlet or by switching off an external circuit breaker, depending on installation) before
performing any operation on this product. Failure to do so may cause fire and may result
in a serious personnel injury or even death.
Disconnect power cord from the Power Supply Module before wiring, removing or
servicing.
An isolated 24 VDC output rated at 10 W (400 mA) is an option available for powering a limited
number of analog loops or digital circuits. It cannot be used with inductive loads such as coils,
contactors etc. Power for these is to be provided from a separate supply.
In addition the module has limited charging capacity for externally connected lead acid batteries. The
temperature compensated charging capacity is designed for float operation and short term boost of
batteries already charged and in good condition. Use of this supply on flat or fully discharged batteries
may cause damage to the power supply module.
When the AC supply fails and the system is powered from the backup battery, the voltage monitoring
circuit provides battery cut-off (for battery preservation) when battery cell voltage drops to
10.5 V ± 0.2 V.
The PS-11 has battery voltage, battery current, supply current, and internal or external temperature
monitoring circuits that enable the processor module to access these as analog and digital points in
the system.