ELECTRIC VEHICLE MANAGEMENT SYSTEM V3
ZERO EMISSION VEHICLES AUSTRALIA
Rev Current Disp.
Yes/No
Reverse Current Display. By default, current is
displayed with discharge amps positive. In some
applications it is preferable or more intuitive to
display charge amps positive instead.
Night Brightness
0-100%
Adjusts the brightness of the LCD display in
low light mode, to reduce screen glare at
night. Toggle between full brightness and night
brightness by either swiping a finger up/down,
or using the MPI pin as a headlight sense.
Buzzer On
Yes/No
Selects whether the Monitor should sound the
buzzer for alerts. (Safest to leave this on.)
Use Fahrenheit
Yes/No
Changes display of temperature units to
Fahrenheit instead of Celcius.
SoC Display
Percent or
Amp-Hours
The battery State of Charge value displayed on
the Monitor can either be shown as a percentage
of full charge, or as the number of amp-hours
remaining.
Multi-Purpose Input and Outputs
The EVMS has one Multi-Purpose Input (MPI) terminal and two Multi-Purpose Output (MPO)
terminals, which can be assigned to a range of additional functionality.
The MPI terminal has a high input impedance so will never draw more than a fraction of a
milliamp. The MPO terminals are limited to about 0.5A continuous current (either in or out
of the terminal), but can handle several amps short term so are compatible with driving full
size contactors, so long as they include a coil economizer to reduce holding current below
0.5A.
MPI Function
Description
Wake up
Join terminal to ground/chassis momentarily to wake the EVMS from
sleep mode (without entering Running or Charging mode).
Note: Other MPI functions will still perform an EVMS wake up too.
Alt charge
Join terminal to ground/chassis to switch TC Charger to second (“Alt”)
set of voltage and current settings. Useful if you sometimes use two
different sized chargers, or if you sometimes need to restrict a large
charger from overloading a small AC socket.
Hdlight In
Headlight Input. Connect MPI terminal to the headlight signal in your
car (+12V when headlights are on) to have the EVMS automatically
dim the Monitor brightness at night, based on the Night Brightness
setting.
Ctr Aux Sw
Contactor Auxiliary Switch. Wire the MPI terminal to the auxiliary
switch of your main contactor (with the other side of the switch
connected to ground) to have the EVMS monitor the state of the aux
switch. This allows the EVMS to provide a warning if the contactor
is not working correctly (not closing when it should close, or not
opening when it should open).
MPO Function
Description
Ground
Default state for the output, can be used as a spare ground terminal.
Temp gauge
Can be connected to the temperature sensor input of many OEM
instrument clusters, to view the EVMS temperature input on the
original temp gauge (calibrated to the gauge in the settings and
scaled between 0˚C and the “overtemp” setting).
Low SoC Signal
Will output 12V if the battery’s state of charge percentage is below
the “SoC Warning” setting. Can be used for a warning system, or to
turn on additional charging systems (such as a genset).
Overtemp signal
Will output 12V if any BMS temperature sensors exceed the “BMS
Overtemp” setting. Can be used as an additional warning or to turn
on battery cooling systems.
Undertemp Signal
Will output 12V is any BMS temperature sensors are below the “BMS
Undertemp” setting. Can be used to enable battery heating systems
in cold climates.
Error Buzzer
Will output 12V if any error is pending in the EVMS, to drive
additional warning buzzers. May be used to supplement the EVMS
Monitor’s internal buzzer, or if no Monitor is present.
Status Light
Can be used to drive an external light to show EVMS status. Off when
the system is idle or sleeping, on (12V) when running or charging,
and flashing if any error is pending.
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