Battery Charging And Back Up; Trouble Shooting - Samlexpower SEC-1212 Installation & Operating Manual

BATTERY CHARGING AND BATTERY BACK-UP
!
WARNING ! THESE UNITS ARE POWER SUPPLIES AND
NOT BATTERY CHARGERS. DO NOT CONNECT THESE UNITS DI-
RECTLY TO A BATTERY
These units should NOT BE DIRECTLY CONNECTED TO A BATTERY
for charging or for battery back-up. Battery charging and battery back-up
may be undertaken only when the battery is connected through suitable
external isolating diodes and charge limiting resistor. The isolating diode
will ensure that the battery does not back power the power supply. When
a battery is deeply discharged, it will initially draw a very large charging
current and thus, will force the power supply into current limit mode for
prolonged periods. This is harmful for the power supply. The charge
limiting resistor will limit the charging current, thereby, ensuring that the
maximum charging current is well below the current limit value of the
power supply. It is recommended that optional battery back-up
module BBM-1225 may be used to convert SEC-1212/SEC-1223 for
battery back-up application.
TROUBLESHOOTING - GENERAL
PROBLEM : Power ON/OFF switch does not illuminate when turned on.
PROBABLE CAUSE
No power in the AC outlet
AC side fuse inside the power
supply is blown
PROBLEM : AC side fuse blows as soon as power is turned on.
PROBABLE CAUSE
Unit is defective
SUGGESTED REMEDY
Check there is power in the outlet.
Replace the fuse inside the unit.
See fuse ratings at page 11
SUGGESTED REMEDY
Call technical support.
5.
7. Following additional guidelines may be followed to reduce
the effects of RF noise:
a. Use additional appropriate AC radio frequency interference
(RFI) power line filter immediately before the ac input of the
power supply. Recommended: Corcom Inc. ( www.cor.com )
"Q" series. Filtered, ferrite coated cord set
(www.emceupen.com ) is another choice. These cord sets,
with integral line interference filters, reduce common and
differential mode interferences over a wide frequency range.
Because they are shielded, they are also effective against
radiated interferences. In addition to the built-in filter networks,
the cable conductors are coated with an RF absorbing ferrite
compound. This provides additional attenuation at high frequen-
cies that is lacking in most regular LC filters. The RF absorp-
tion of the ferrite-coated cable avoids resonance's at high
frequencies, reducing the conducted and radiated RF noises
even further
b. Use additional appropriate DC radio frequency interference
(RFI) power line filter immediately after the DC output of the
power supply. Recommended: Corcom Inc.(www.cor.com )
"DA" / "DC" series
c. Twist the positive and negative wires from the output of the
power supply to the radio
d. The DC side positive and negative outputs of these power
supplies are isolated from the chassis. As explained at para-
graph 6 above, the noise currents are filtered to the chassis
ground and the chassis ground is connected to the earth
ground through the earth ground pin of the AC power outlet
receptacle. Avoid connecting (referencing) the DC negative
output terminal of the power supply to the earth ground.
e. Connect a 1/4" wave length of wire on the negative terminal of
the power supply. Connect one end of the wire to the negatvie
terminal and leave the other end free. The wave length corre-
sponds to the wave length of the interfering frequency.
be practical for long wave lengths)
[ Formula: Wave length (Meters) = 300 / frequency in MHz ]
(May not
10.