CSE Kingfisher PLUS+, Hardware Reference Manual

Page: 20 / 89

Superseded Hardware Manual 7.12 Page 20
P S U-2 Blo c k Dia g ra m
+
FILTER
-
E
B+
B-
OPTIONAL
BATTERY
+ 5V
REGULATOR
50W
DC/DC
CONVERTER
+ 12V
5V
0V
EARTH
ON/OFF
BACKPLANE
80C51 MICRO
CONTRO LLER
RS485
DRIVER
10W DC/DC
CONVERTER
VA+
VA-
+ 24V
ISOLATED
OUTPUT
ON/OFF
BATTERY
CUT OFF
SERIAL BUS
LED DISPLAY
MONITORING
MODULE
ADC 8 BIT
TEMP.
SENSOR
V
I
Vs
P S U-2 Mo d u le LEDs
Three red LEDs la5 V, +12 V and Vs are on when the various power supply sections are
functioning correctly. The Vs LED indicates when the isolated 24 Volt/10 Watt output is activated. This
output is under the main processor control (CP-1 or SBX-2) but is normally in the on state. A green
LED at the top of the face plate is ON when the microcontroller of the monitoring circuit and the power
conversion circuits are operating correctly. An additional four red LEDs labelled CHG, FL, BO and LO
indicate the condition of a connected battery which are:
CHG
Battery is being charged
FL Battery is in float charge mode
BO Battery is in boost charge mode
LO Battery has reached its discharged condition (<22 V)
This 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 in a backplane thus providing redundant and alternative
power source configurations.