P.O. Box 1306
Newport Beach
California 92663
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: techservice@newmarpower.com
www.newmartelecom.com
Status LEDs
Refer to the illustration below for location of the front panel status indicator lights:
1. ‘CHARGING’ Green LED activates when charge-mode begins or, INPUT power is applied for the first time and indicates
Back-up battery is being charged.
Charging
Color
Status
AMBER
Bulk/Hi Rate
GREEN
Float
OFF
Charger Off
Flashing RED
Charger Over-Temp
2. Amber ‘ON BACK-UP POWER’ LED indicates Back-up battery
providing power to OUTPUT
On Back-Up Power
Color
Status
AMBER
Input below
10.5 VDC
3. ‘INPUT CONNECTED’ Green LED activates when INPUT > 10 volts
and indicates INPUT is providing power to OUTPUT.
Status
LED Operation
Status
Steady GREEN
Input voltage range normal/
OK
Flashing GREEN
Disconnect Timer (TMR)
Activated
Flashing RED
Input voltage range abnormal
Steady RED
Output disconnected-TMR
timed out
Internal Battery Charger Operation
The internal lead-acid battery is charged by a 3 stage charger with automatic temperature compensation (30 mV/° C
from 25° C). When the internal battery goes through a discharge cycle the charger is automatically brought online and
charges the battery. Initially the charging voltage increases to produce a constant current of approximately 1.8 amps
to the battery (stage 1 - bulk rate). Once the battery voltage reaches approximately 14.2 volts, the charging current will
start to reduce. The voltage will remain at 14.2 volts (stage 2 - high rate/absorption charge) until the current to the battery
decreases to approximately 0.5 amps. The output voltage is then reduced to approximately 13.6 volts (stage 3-float
charge) and remains there for a fixed time of approximately 1 hour after which the charger is turned off. The charger will
periodically re-start to top off the battery. (The charger re-start time interval is adjustable, see Advanced Settings page 7).
Complete charging cycle of fully discharged battery is approximately 3-4 hrs. Charger over-temperature protection: The
battery charger circuit will automatically switch to reduced float voltage if the MDP internal temperature reaches 55° C.
The over-temperature protect circuit will automatically reset once internal temperature reduces to approximately 50° C
Disconnect Timer (TMR) Operation
The MDP-25.0 incorporates an optional timed load disconnect feature (TMR). When activated the timer will begin timing
when the vehicle battery drops to 12.0 VDC or less. If the ignition override feature is wired to the ignition switch (J1 pin 2,
‘Ignition IN’), it will disable the TMR timed disconnect as soon as it senses 2 volts or greater. To enable the TMR feature and
select a disconnect time period via the DIP switches, you must do following:
Settings:
Modifications can be made to disconnect
points and timer circuits, see page 6 for Time Delay
Settings.
5
Fig. 3: Status LEDs
Status LED Legend
refers to
