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IV) Operation
A) AC Input
The PM will operate on any AC voltage in the following
range: 90-264 VAC, 50-60 Hz.
AC input is protected against over-current and internal
short circuit condi tions by the circuit breaker/input
power switch on the front panel. When this switch is
in the on position and DC is available at the output
terminal, the "ON" indicator L.E.D. on the left side of the
front panel will illuminate green.
If AC power is connected and the input power switch
is on but AC Input indicator is red, a fault has occurred
within the Power Module.
B) DC Output
The PM produces 12, 24 or 48 VDC nominal output,
depending on model. The ground reference may
be positive, negative or floating. Chassis is isolated
from DC. A 1/4" chassis ground stud is provided for
grounding the chassis to DC pos. (+), or neg. (-) if
desired
Regulation: Regulation at the output terminal is
within ± 2 % of rated voltage, under all line and load
conditions. Ripple is within ± 1 % of rated voltage with
or without batteries on-line.
Output Voltage Adjust: Factory-set voltages (as
measured at the output terminal) and approximate
adjustment ranges are specified below. Adjust ment
is made at the "OUTPUT VOLTAGE ADJUST" pot on
the left side of the front panel using a small flat tip
screwdriver (see Figure 1). Output voltage test points
provided beside the voltage adjust pot for ease of
monitoring while making this adjustment. Use of a
digital multimeter is recommended when making this
adjustment. If the PM has had the charger function
board installed, output voltage adjustments are
automatic and this adjustment pot has limited range.
Output Voltage Table
Factory Set "V OUT" "V OUT"
Model
Output Voltage
PM-12-80
PM-24-40
PM-48-20
7
P.O. Box 1306
Newport Beach
California 92663
Adjustment
Range
13.6V DC
12.2 - 15V DC
27.2V DC
24.4 - 30V DC
54.4V DC
48.8 - 60V DC
Current Limit Circuit:
The PM is rated for continuous
duty at the current level indicated by model
number, e.g., PM-24-40 is rated at 40 amps con-
tinuous duty. To prevent overload when recharging
severely discharged batteries, current is limited at
approximately 105-115% of the continuous duty rating.
DC Fuses:
d.c output wiring is protected by an internal
DC output fuse. The current limiting circuit of the PM
should prevent this fuse from blowing under normal
operating conditions. If the d.c fuse blows, this may
indicate a reverse polarity hook-up or an internal short.
Always disconnect AC to the PM before checking fuses.
To replace the DC fuse, the cover must be removed.
The DC fuse is an HBO type mounted near the rear
panel . Be sure to replace with the same type and
value as indicated on the fuse.
If the battery is connected to the PM output with
backwards polarity, the fuse should blow to protect
DC wiring. However damage to internal components
may also have occurred. If the replacement fuse blows,
return the PM to the factory for a thorough inspection.
C) Local/Remote Alarm
A loss-of-output relay and loss of input relay (both
form "C") are wired to the pluggable output connectors
on the rear panel. When wired to an external alarm
or remote indicator lamp it will alert the operator in
the event of any condition which causes a loss of DC
output.
The alarms may be wired with the relay "normally
open" or "normally closed", as needed. See FIGURE 2
for the contacts position during input or output failure
and normal operating condition.
Relay contact rating for all models is 2A @ 30V DC.
V) Options
A) DC Quick Connect Wiring Kit
Note: This option is available only for systems which
incorporate the NEWMAR Power Function Manager.
For complete information on this product, please
contact the factory.
A DC wiring harness quick connect kit is available
from NEWMAR which simplifies parallel wiring
installation of multiple Power Modules with the Power
Function Manager and facilitates "hot change-out" of
modules for repair or replacement.
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: techservice@newmarpower.com
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