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Output Signals:
The MDP is programmed to provide early warning signals to mobile data computers designed for this input (such
as Motorola® MW 800 Series workstations.) Interface signals for this output is located on the D-sub connector per the
following pin out (please contact factory for mating connector with pigtails):
Ignition OUT
1
6
Ignition IN
2
7
Charge/Discharge
3
8
- INPUT
4
9
Not Used
5
OPERATION
Under normal operating conditions, the electronics operate from primary battery voltage of the vehicle or vessel. This
same voltage powers the internal battery charger that maintains the MDP internal battery in a fully charged state.
The charger circuit operates on an input range of 9.5-14 volts, so even if the primary battery voltage decays the
MDP internal battery will receive proper voltage and be maintained at full charge. The internal charger has a rapid
recovery, three step output and temperature compensation sensor that varies the charge voltage based on ambient
temperature to prolong battery life.
A fast acting sense circuit connects the internal battery online to the electronics any time when the input voltage
drops below 10 volts or total interruption of voltage occurs augmenting voltage to the electronics for 3 seconds. If
proper primary voltage is not restored within the 3 second time frame, input from the vehicle battery disconnects and
electronics operate entirely from the MDP reserve battery (see settings sections for variations on this function).
The internal MDP battery will continue to supply power until primary vehicle or vessel battery voltage is restored
(> 12.0 volts) or to the point where the MDP internal battery discharges below 9.6 volts, at which time a low voltage
disconnect energizes, shutting off all power to the MDP output. When primary vehicle or vessel voltage is restored,
the internal battery will begin to recharge and be available for reserve power after voltage is restored to >13.5 volts
(approx 120 minutes from fully discharged state)
Important Note: The MDP function is that of an uninterruptable power source, so if electronics are wired directly to the
MDP output and the primary feed voltage to the MDP is via an ignition switch, when the switch is turned off the MDP
will continue to power the load until its internal battery reaches a low voltage disconnect point. Ideally the power to
the MDP should be left on. If the vehicle is left for an extended period, the powered electronics should be shut off to
conserve the primary battery. The MDP has a power conservation "sleep mode" that initiates and turns off the 3 stage
charger when the unit senses float charge for more than 20 minutes. For long term storage, remove loads from MDP
output and remove input fuse.
CAUTION: DO NOT LEAVE THE BATTERY DISCHARGED FOR EXTENDED PERIODS OF TIME. IT MAY BE PERMANENTLY
DAMAGED AND MAY NOT TAKE A RECHARGE
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 Backup
battery is being charged.
2. Amber 'ON BACK-UP POWER' LED activates when INPUT
< 10 volts and indicates Back-up battery providing
power to OUTPUT
3. 'INPUT CONNECTED' Green LED activates when INPUT
> 10 volts and indicates INPUT is providing power to OUTPUT
Settings: Modifications can be made to disconnect points and timer circuits - Please contact factory.
P.O. Box 1306
Newport Beach
California 92663
Signal Key:
1) Ignition OUT - to be connected to MDC interface with signal which initiates
Not Used
startup and shutdown sequence of computer.
Not Used
2) Ignition In
Not Used
3) Charge/Discharge signal – used to signal computer that power is coming from
Not Used
backup battery. Active LOW (<2V)
www.newmarEVpower.com
1. Charging (Green)
2. On Back-Up Power
(Amber)
3. Input Connected
(Green)
E-Mail: techservice@newmarpower.com
4
Phone: 714-751-0488
Fax: 714-957-1621
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