www.pulsar.pl
PSUPS10A12
3
1.1. General description.
A buffer PSU is intended for an uninterrupted supply to CCTV system devices requiring stabilized voltage of
12V
DC (+/-15%)
. The PSU has two circuits: first 12V DC 5A for supplying the recorder, second 8x0,5A/12VDC for both
cameras.
Current efficiency of the PSU amounts to
8x0,5A + 1x5A.
Total current of the rec battery: 11A max.
In case of a mains power loss, a battery back-up is activated immediately. The PSU is mounted in a metal
enclosure (RAL 9003 colour) that accommodates a 40Ah/12V battery. The enclosure is equipped with a micro-switch
indicating unwanted opening of the door (faceplate) or detachment from the mounting surface.
1.2. Block diagram (fig.1).
Fig.1. Block diagram of the PSU.
1.3 Description of PSU components and connectors (tab.1, tab.2, fig.2, fig.3).
Table 1. Components of the Power supply PCB (Printed Circuit Board) (see Fig. 2).
Element no.
Description
[1]
P
BAT
; pin
configuration of the battery protection system UVP
P
BAT
=
discharged battery disconnection system OFF
P
BAT
=
discharged battery disconnection system ON
T
AC
Jumper
- setting the delay time for AC power failure indication
T
AC
=
delay time T= 10s
T
AC
=
delay time T= 60s
Caption:
jumper on,
jumper off
[2]
START
button (launching the PSU from a battery)
[3]
V
ADJ
potentiometer, DC power adjustment 12
÷ 14,5V
[4]
F
BAT
fuse in the battery circuit, T10A / 250V
[5]
Terminals:
~AC~
– AC power input
EPS
– technical output of AC power failure indication
hi-Z state
= AC power failure
0V state
= AC power - O.K.
PSU
– technical output of PSU failure indication
hi-Z state
= failure
0V state
= PSU status O.K.
LoB
– technical output of low battery voltage indication
hi-Z state
= battery voltage U
BAT
<11,5V
0V state = battery O.K.
+BAT-
–
terminals for battery connection
+AUX-
–DC power output, (+AUX= +U, -AUX=GND)
Description: hi-Z
– high impedance, 0V – connection to the ground GND
[6]
LEDs
– optical indication:
AC
– AC power
AUX, AUX1, AUX2, AUX3
– output voltage DC
[7]
LED indication connector
