CSE Kingfisher PLUS+, Hardware Reference Manual

Page: 13 / 89

Superseded Hardware Manual 7.12 Page 13
1.2 P S -10: AC S u p p ly In p u t 90 to 260 VAC
& P S -20: DC S u p p ly In p u t 20 to 60 VDC
The PS-10 power supply provides AC to DC conversion, DC voltages for the backplane, battery and
radio (or an external device), an optional isolated 24 VDC output and an optional monitoring
processor. The PS-20 power supply offers the same functionality as the PS-10 except it has a DC
supply input instead of an AC supply input.
The PS-10 and PS-20 are manufactured to power a 12 V backplane, 12 V battery and 12 V radio. The
PS-10 and PS-20 are available as a 24 V module by special order (please see below for
specifications).
An isolated 24 VDC output rated at 10 W (400 mA) is an option available for powering a limited
number of analog loops or digit input 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.
When the AC supply fails and the system is powered from external lead acid batteries (if connected),
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-10/20 has an optional monitoring processor that can be factory fitted. This allows battery
voltage, battery current, regulated supply current, and internal or external temperature to be
monitored.
If no monitoring circuit is loaded, the PS-10/PS-20 will not be able to communicate with the processor
module and therefore will not show up in the hardware overview. In addition, there will be no power
supply monitoring information (i.e. indication of battery current, battery voltage, temperature, battery
low, AC present, Aux 24 V present) in the system. On/off control of the radio power and auxiliary 24 V
output power will be under control of the processor module.
A power supply module can be installed in any I/O slot of a 3, 6 or 12 slot backplane in a system. Up
to 4 Power Supply modules of any type can be installed on a backplane thus providing redundant and
alternative power source configurations.
Part numbers:
PS-10-CU, PS-20-CU
‘C’= Auxiliary 24 V DC to DC converter fitted. ‘0’=Not fitted.
‘U’= Power supply monitoring processor fitted. ‘0’=Not fitted.