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SECTION 8 |
7.
Switch ON the unit by pressing the power ON/OFF switch to ON position. The switch
will be illuminated confirming that input power is available.
8.
A short beep may be generated by the temperature fault alarm circuit on powering
ON the unit . This is normal, please disregard.
9.
The PSM Status LEDs will light and "ON" signal will be fed to the associated drives of
the opto-couplers for remote monitoring / indication through the 25 pin d-sub con-
nector. As explained under design & principle of operation, a minimum load current
is necessary to operate the current share control circuitry of the PSMs. It is likely that
due to the drift in the pre-set values, the minimum internal preload current may not
be sufficient to provide adequate feedback signal strength resulting in shut down
of one or more modules when no external load is present (the associated PSM status
LED will flash and also, the associated signal for driving the opto couplers for remote
indication will oscillate between "ON" and "OFF" conditions). As soon as external
load is applied to the unit, the feed-back signal strength will increase and the PSM(s)
that were shut down will also operate normally.
10. Switch the volt/amp change-over switch to the "VOLT" position. The voltmeter
should read 27.8V on no load.
11. Switch on the D.C. Loads. The output voltage on load should be 27.5V to 27.4V.
12. Switch the volt/amp meter switch to "AMP" position to read the load current. Ensure
that the load current is within the total rated continuous load of the modules installed.
SECTION 9 |
WARNING!
The battery should be located in a well ventilated area to safely dissipate
hydrogen gas produced during the charging process.
ATTENTION!
La batterie doit être située dans une zone bien ventilée pour dissiper en toute
sécurité le gaz hydrogène produit pendant le processus de charge.
Please refer to the schematic at Fig. A.
Regulated output voltage of 28VDC +/ - 1% from the modules ( measured at screw
terminals S5 and S6, (Fig.1) is fed to the Positive and Negative DC bus bars and from
there to the output terminals load+ and load- through the isolating Schottky Diode
D1. Although the output voltage at the module terminals S5 and S6 (Fig.1) or at the
common DC bus bar (before the Schottky Diode D1) is tightly regulated at the preset
value of 28VDC +/ - 1%, the voltage at the output terminals load + and load - will vary
slightly due to the forward voltage drop of the isolating Schottky Diode D1 and the
drop along the DC bus bar and wiring.
Installation & Operation
Operation of Battery Back-up
SAMLEX AMERICA INC. | 11
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