13
Installation, Wiring, and Connections
The ALS-600SPS switching power supply is factory wired for 100-130 VAC. The linear
ALS-600PS is prewired for 120-125 VAC nominal voltage. Both use standard NEMA-5-
15P 15 ampere 120-volt plugs. The round center pin is the safety ground. Do not
remove the safety ground.
CAUTION!
Before
connecting the power supply to an electrical outlet, always be sure
you have completed the following four steps:
1. Insert the 15 ampere 250V fuses into the two black fuse caps.
2. Insert the fuse and cap assemblies into the power supply’s fuse holders.
The fuses lock in place with a push and slight turn.
3. Connect the power supply to the amplifier.
4. Be sure the amplifier power switch is
off
.
Caution!
Fuses have both voltage and current ratings. Use only 250V rated
fuses in this device. The voltage rating is generally marked on fuses. DO NOT use
automotive-type low voltage fuses in any power line application. See power
supply instructions.
Warning:
Never insert the power supply cord into the outlet until you have
completed steps 1 through 4 above!
Position the amplifier at or near the desired location on your operating desk so you have
access to the rear panel, and connect the rear panel cables.
Do not connect the
power mains at this time!
Safety and Lightning Grounding
The power supply cabinet grounds through a safety ground pin on the power plug. This
system depends on a properly wired power outlet.
Lightning protection grounds do very little good at the operating desk. Lightning
protection grounds belong at the antenna cable entrance to the building. Station ground
rods
must always
electrically connect through low impedance and resistance
conductors to the power line entrance ground. The national electrical code in the USA
prohibits isolated ground systems at dwelling entrances.
Isolated
ground rods or
systems connected to conductors entering a dwelling increase the damage likelihood
during storms, and increases fire hazard and shock risk.
RF grounds generally belong at the antenna or at the feed line entrance. With the
special exception of a small floating counterpoise grounds, RF grounds at or very near
the dwelling should bond into the mains ground outside the dwelling. This is especially
true with earth contact grounds.
There is a ground lug on the amplifier rear panel. This ground lug provides a convenient
chassis connection for operating positions with ground bus on the desk. A station
ground bus helps ensure desk area equipment cabinets are close to the same electrical
potential for radio frequencies and lower. Equipment ground lugs are
NOT
for
independent wires or connections to external ground rods or ground systems from each
Summary of Contents for ALS-706
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