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3.2.2 DC Voltage Monitor Ports
There are three ports total that monitor DC voltage. Two are rated for 0-40 VDC input, (terminals 15-16 and
17-18) and a third, (terminals 7-8) with inverse ground reference rated for 30-60 VDC input, intended primarily
for neg. 48 volt telecom system use. Note all DC sense voltage ties to the SPM must share a common ground
with the DC power source. CAUTION: If you intend to power -48 VDC AND monitor -48 VDC, input power must
come from an isolated DC converter. If you need one, we will provide it free of charge. Contact Newmar 800-
854-3906 or E-mail: techservice@newmarpower.com and request model: 48-12-1i
3.2.3 DC Current
Terminals 5 & 6 (Is1 and Is2) A 0-100mV DC shunt input and shunt are provided for measuring DC current
(not provided) Shunt can measure load current, rectifier current, battery current (charge and discharge),
depending on where the shunt is installed in the power distribution system. Use twisted pair wires for best
results and steady noise free readings. Install shunt in positive or negative lead. Polarity of the shunt output
can be swapped to achieve desired positive or negative current flow indication.
3.2.4 Dry Contact Switch Sensors
Terminals 9-10, 11-12, 13-14. Connect up to three devices with switched alarm contacts (N/C or N/O) between
A1 and A1 RTN. Assign user-friendly names on Display Tab on monitor that describe the specific functions of
each circuit. Some examples include: Magnetic Door Switch, Rectifier Alarms, Smoke Alarms, Battery Temp
Alarms, loss of voltage, contact relay closure, etc. Multiple switches can be installed in series, or paralleled in
a string to a single input to the SPM.
3.2.5 AC Voltage Monitoring
Two ports are available for monitoring AC voltage sources: One for Utility line power, and a second for an
auxiliary/back up source such as generator or inverter with floating output.
Utility power: Connect AC voltage Line and Neutral to these input terminals 1 & 2. To measure and log AC
voltages from 90-264 VAC, 47-63Hz. Fuse the Line side (hot) with a 1 amp fast blow fuse (provided).
Auxiliary power: Connect to inverter output to measure a secondary AC source of 90-135 VAC, terminals 3 &
4. Fuse the line side (Hot) with a 1 amp fast blow fuse. Note: This input can be used to monitor a second utility
or generator source providing it's a Line to Neutral source with grounded Neutral which must be connected to
"INV IN (GND)", Terminal #4
CAUTION: Never connect the line side (Hot) of an AC source to INV IN (GND) or any RTN terminal on the SPM.
3.2.6 Ethernet Connection
Remote monitoring requires Ethernet connection via RJ 45 jack. If using SPM-200 as a data logger only, this is
also where the CSV file is extracted. Plug into the port on left side of unit. The right hand side LED on jack will
illuminate GREEN and then start flashing to indicate good connection and activity. The left hand side LED will
only illuminate (AMBER/YELLOW) to indicate the RJ45 reset button has been held in long enough to cause a
'reset IP to Factory' settings. The SPM-200 requires a 100BaseT connection.
15272 Newsboy Circle
Huntington Beach
California 92649
www.newmartelecom.com
Phone: 714-751-0488
Fax: 714-896-9679
E-Mail: techservice@newmarpower.com
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