Pulsar LPA100, Системное руководство

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Copyright © 2001 Pulsar Technologies, Inc.
Chapter 7. Power Supply Module
7
7.1 Power Supply Module
Description
The Power Supply Module for the LPA50/LPA100
has dual dc/dc high-frequency switching regula-
tors which generate regulated voltage outputs of
±20 Vdc (between 1.5 and 2.0 Amps) for
operation of the modules. It also provides protec-
tion from battery surge, transients, short circuits,
and reverse voltage. The Power Supply Module
can receive inputs from three available groups of
station batteries: 38-70 Vdc, 88-140 Vdc, and 176-
280 Vdc.
7.1.1 Power Supply Control Panel
(This panel is shown in Figure 7-1.)
Front panel controls are as follows:
1) Push-button Switch (with power-on
indicator), ON/OFF (S1).
2) LEDs for indicating power:
• INPUT, Red (LED1)
• OUTPUT, Red (LED2)
3) Test Jacks:
• +20 Vdc, Red (TP3)
• Common, Green (TP2)
• -20 Vdc, Black (TP1)
An optional low-voltage alarm relay indicating
loss of power is available. When the alarm is
activated, LED2 is “OFF”. LED1 may be “OFF”
if input power is lost.
7.1.2 Power Supply PC Board
Figure 7-2 shows component locations for the
Power Supply Module.
Control is as follows:
Jumper J1 for Alarm Relay; establishes loss of
power condition (NO/NC).
Schematic 1617C38-2
Parts List 1617C38-2
Group Description
G01 48 V WITH ALARM RELAY
G02 125 V WITH ALARM RELAY
G03 250 V WITH ALARM RELAY
Table 7–1. 1617C38 Styles and Descriptions.
Figure 7–1. Power Supply 1617C38 Front panel.
POWER SUPPLY
POWER
INPUT
OUTPUT
+20V
–20V
COMMON