ME500-X
Trackunit ME500-X, Technical Manual v.1.1, January
2016
Page 11
Power supply
The unit
must
be connected to 12V, +24V, +36V or +48V battery voltage through a
1 amp. fuse. The use of a fused supply wire is important for not damaging the wires
related to the unit in case of a short circuit etc.
Digital inputs
The activation of a digital input requires a minimum high level voltage of 8V.
Digital output
The digital output has the type indication ”LO-side switch”, that connects the output to 0V
“ground”, when the output is active. This output can be used to control a relay powered
from an external DC supply voltage. The maximum current drawn from the output is
200mA and the voltage from the external supply voltage must not exceed 52V DC.
The output is protected against short circuits, overload and is also protected against over
voltage. For further information about connection possibilities of the digital output, see
chapters about installation later in this manual.
Motion/acceleration sensor
The unit has a built-in 3 axis acceleration sensor that is able to activate the unit if it, as a
consequence of disconnected supply voltage, is in stand-by mode.
1-Wire input
The 1-wire (Green wire) is designed to communicate with Dallas iButton Key or Trackunit
RFID/PIN reader for access control.
The 1-wire input is only operational when supply voltage (12V / 24V / 48V) is present.
It cannot operate on internal battery alone.
Installing the ME500-X as to surpass the main switch on the machine:
In case the main switch on the machine will break the negative wire (Ground wire), the
inputs may register a voltage level and start counting operating hours. To avoid this
situation the digital input 4 (Pink wire) should be connected to the chassis/ground on the
machine. Then send the following SMS to the unit (phone number) to activate the filtering:
Function
Send SMS
Return-SMS from the unit
Activate filter function on inputs.
MT INFILT ON
MTC ACK (SERIAL No.) INFILT ON
NOTE:
Enabling the filtering function will disable the use of the digital input 4 as a
normal input.
NOTE:
It is recommended always to connect digital input 2 to the ignition signal of the
vehicle or machine.
NOTE:
For the “Send SMS” it is of no importance if small or capital letters are used in
the command string, or a mixture hereof.
