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FIGURE 6
Parallel (two to four Power Modules)
and N+ 1 redundancy, negative ground
(+) Positive to
Distribution Panel
or Battery
(fuse at battery
per N.E.C. or
local codes)
(-) Negative to
Loads and/or Battery
IV) OPERATION
A) A.C. Input
The PM will operate on 230 VAC (±10%) single phase input at 50-60
Hz. No adjustment is required for 50 or 60 Hz. operation.
a.c. input is protected against over-current and internal short circuit
conditions by the two pole circuit breaker/input power switch on
the front panel. When this switch is in the on position and d.c. is
available at the output terminal, the "ON" indicator L.E.D. on the left
side of the front panel will illuminate.
B) D.C. Output
The PM produces 24 or 48 VDC nominal output, depending on
model. The output of the PM is Or-ring diode isolated. The ground
reference may be positive, negative or floating. The DC output is
floating from chassis and can be grounded positively or negatively.
Output Voltage Adjust: Factory-set voltages (as measured at the V
OUT terminal) and approximate adjustment ranges are specified
below. Adjustment is made at the "OUTPUT VOLTAGE ADJUST" pot
6
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
DC
AC
OUTPUT
INPUT
FAIL
FAIL
OK
OK
C
C
STATUS
CONTACTS
OUTPUT VOLTAGE:
48 VOLTS
MAX OUTPUT CURRENT:
50 AMPS
NEWPORT BEACH, CA. USA
GND
DC
AC
OUTPUT
INPUT
FAIL
FAIL
OK
OK
C
C
STATUS
OUTPUT VOLTAGE:
CONTACTS
48 VOLTS
MAX OUTPUT CURRENT:
50 AMPS
NEWPORT BEACH, CA. USA
GND
DC
AC
OUTPUT
INPUT
FAIL
FAIL
OK
OK
C
C
STATUS
OUTPUT VOLTAGE:
CONTACTS
48 VOLTS
MAX OUTPUT CURRENT:
50 AMPS
NEWPORT BEACH, CA. USA
GND
www.newmartelecom.com
www.newmartelecom.com
FIGURE 7
PM #1
TEMPERATURE
PROBE
(-) Negative to
PM #2
Distribution Panel
or Battery
(fuse at battery
per N.E.C.
TEMPERATURE
PROBE
or local codes)
PM #3
TEMPERATURE
PROBE
Ground
(+) Positive to
Bus Bar
Loads and/or Battery
on the right side of the front panel using a small flat tip screwdriver
(see Figure 1). Output voltage test points are 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.
Output Voltage Table
Factory Set
Model
PM-24-80
PM-48-50
Current Limit Circuit: The PM is rated for continuous duty at the
current level indicated by model number, e.g., PM-48-50 is rated at
50 amps continuous duty. To prevent overload when recharging
severely discharged batteries, current is limited at approximately
105 % of the continuous duty rating by a current fold-back circuit.
D.C. Fuse: d.c output wiring is protected by an internal d.c. output
fuse. The current limiting circuit of the PM should prevent these fuses
from blowing under normal operating conditions. If the d.c. fuse
blows, this may indicate a reverse polarity hook-up or an
internal short.
Parallel (two to four Power Modules)
and N+ 1 redundancy, positive ground
OUTPUT
FAIL
OUTPUT VOLTAGE:
48 VOLTS
MAX OUTPUT CURRENT:
INPUT VOLTAGE: 230 V
@ 22 A, 50 - 60 Hz
50 AMPS
GND
OUTPUT
FAIL
OUTPUT VOLTAGE:
48 VOLTS
MAX OUTPUT CURRENT:
INPUT VOLTAGE: 230 V
@ 22 A, 50 - 60 Hz
50 AMPS
GND
OUTPUT
FAIL
OK
OUTPUT VOLTAGE:
48 VOLTS
MAX OUTPUT CURRENT:
INPUT VOLTAGE: 230 V
@ 22 A, 50 - 60 Hz
50 AMPS
GND
Output Voltage
27.2V d.c.
54.4V d.c.
PM #1
DC
AC
INPUT
FAIL
OK
OK
C
C
STATUS
CONTACTS
NEWPORT BEACH, CA. USA
PM #2
DC
AC
INPUT
FAIL
OK
OK
C
C
STATUS
CONTACTS
NEWPORT BEACH, CA. USA
PM #3
DC
AC
INPUT
FAIL
OK
C
C
STATUS
CONTACTS
NEWPORT BEACH, CA. USA
Ground
Bus Bar
Adjustment Range
24.4 - 30V d.c.
48.8 - 60V d.c.
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