www.nationalrailwaysupply.com 1
01545J
NATIONAL
RAILWAY
SUPPLY
Installing, Operating and
Service Instructions for the
NRS-12/40 Solid State Charger
MODEL NRS-12/40 BATTERY CHARGER
PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS
For correct operation of the equipment, it is important to read and be familiar
with this entire manual before installing and operating the charger.
DO NOT DISCARD THIS MANUAL AFTER READING.
LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. IT MEANS:
BECOME ALERT—YOUR SAFETY IS INVOLVED. IF YOU DO NOT FOLLOW THESE
SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR.
1. IMPORTANT SAFETY INSTRUCTIONS
a. Before using the battery charger, read all the
instructions and caution markings on the
battery charger, the battery, and all of the
products using the battery.
b. Do not touch the uninsulated parts of the AC
input or the DC wires, the charger's binding
posts, or the battery terminals as there is a
possibility of electric shock.
c. Batteries produce hydrogen gas while
operating, which can explode if ignited.
Never smoke, use an open flame, or create
sparks in the vicinity of the battery. Ventilate
the area well when the battery is charging in
an enclosed area.
d. Batteries contain caustic material which may
cause burns. Do not get in eyes, on skin, or
clothing. If the gelled or liquid content of the
batteries contacts the skin or clothing, wash
the area thoroughly with water. In the case
of contact with the eyes, flush immediately
with clean water for 15 minutes and obtain
medical attention.
e. Connect or disconnect the battery plug only
when the charger output is off to prevent
arcing or burning.
f. Only qualified personnel should program or
service this equipment.
g. De-energize all AC and DC power
connections before servicing this unit. If
injury does occur, apply standard treatment
for electric shock and, if necessary, consult
with a physician.
h. The charger is not for outdoor use. Do not
expose the charger to rain or snow.
i.
Do not operate the charger if it has received
a sharp blow, been dropped, or otherwise
damaged.
j. Do not disassemble the charger. Have the
charger examined by a NATIONAL
RAILWAY SUPPLY service agent or a local
qualified service center. If the charger is
reassembled incorrectly, damage to the
charger and the batteries or an electric shock
may result.
2. DESCRIPTION
The NATIONAL RAILWAY SUPPLY charger, model
12/40, is a convection-cooled, solid state, SCR
regulated charger that provides either a constant
current or constant voltage output. The charger can
be set to charge batteries within a voltage range of
10.00 to 19.99 volts for gel-cell, liquid lead-acid,
nickel cadmium, nickel iron, and starved electrolytic
batteries.
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