D) Dc Output Wiring - NewMar PM-12-40 Installation & Operation Manual

Distribution Panel AC Fuse/Circuit Breaker Values
560 watt and PM-12-45: 15 amp
1,000 watt: 20 amp
CAUTION (560 watt unit/230 V a.c applications only): If AC input
is derived from a source consisting of two HOT leads (phase-to-
phase 230V AC input voltage), an external fuse or circuit breaker
(double pole) must be used to protect the unfused (formerly
NEUTRAL, now HOT) lead.

D) DC Output Wiring

IMPORTANT: Ensure that AC input to the PM is switched off
before working with DC wiring. The output terminals are "hot"
whenever the unit is switched on.
1) Output terminals for hard-wiring of DC output are located
on the rear panel of the PM. Terminate wires with 1/4" ring lug
connectors for a secure installation.
2) Use the chart below to determine minimum gauge for wires
depend ing on the particular model and the length of the run from
the PM to the load or distribution bus (or refer to N.E.C or local
codes for any questions regarding proper DC wire gauges):
DC Wire Size Table:
Model Minimum Wire Size per N.E.C. AWG (mm)
PM-48-10 #16 (2 mm)
PM-24-20, PM-48-18 #14 (2.5 mm)
PM-12-40, PM-12-45, PM-24-35 #8 (10 mm)
PM-12-70 #6 (16 mm)
To minimize line loss at lengths greater than 5 feet, it is
recommended to increase wire size one gauge for each
additional 5 feet of cable run.
3) Two separate (+) output terminals are provided. Connection
of d.c. wiring is typically made to the (-) output and the
(+) output ter minal, though
application requires it (see "V2" below).
"V OUT" (+) Terminal: This output is routed through an internal
"or ing"/isolation diode. This terminal should be used for most
installations. Use of this terminal is mandatory when the PM is
wired for parallel n+1 redundant operation, or when it is used
as a battery charger. Regula tion at this terminal is 2 % line/
load. Note: When the PM is used in a parallel n+1 redundant
configuration, output current is derated by 10 % due to current
sharing tolerances (see SPECIFICATIONS section).
"V2" (+) Terminal: This is a direct output without the internal
oring/isolation diode in line. 1 % regulation is available at this
terminal and it should only be used in installations where only a
single PM is used, 1 % regulation is required and the PM will not
be wired to a battery. Output voltage measured at this terminal is
approximately 0.7V d.c. higher than at the "V OUT" terminal.
Typical single PM wiring schemes are illustrated
in Figures 5-8.
Note: 1kW and PM-12-45 models illustrated here; refer to
Figure 2 for output terminal positions of 560 watt models
5
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
"V OUT"
"V2" (+) may be used instead if the
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FIGURE 5: Single Power Module, negative ground, with battery:
(-) Negative to Load
*Typical; Fuse per
or Ground Bus Bar
N.E.C. or local codes
FIGURE 6: Single Power Module, positive ground, with battery:
(-) Negative to Load
or Distribution Panel
FIGURE 7: Single Power Module, negative ground,
no battery, 1% regulation req'd:
FIGURE 8: Single Power Module, positive ground,
no battery, 1% regulation req'd:
*
-
+
BATTERY
(+) Positive to Load
or Distribution Panel
(+) Positive to
Load or Ground
Bus Bar
*Typical; Fuse per
N.E.C. or local
codes
*
- +
BATTERY
(+) Positive to Load
or Distribution Panel
(-) Negative to Load
Load or Ground Bus Bar
(+) Positive to Load
or Ground Bus Bar
(-) Negative to Load
or Distribution Panel