MT 4100 User Guide
8
Power
The MT 4100 accepts 9-32 VDC, minimum 2 amps input power. This allows the device to be used on
both 12 V and 24 V vehicles per SAE specifications, including protection for jump-starting 24 V vehicles.
Pins 17 and 18 on the 22-Pin IO connector are the power input and pins 6 and 7 are ground.
All power and ground pins must be connected.
Power Consumption
Mode
Current
GPS
CDMA BC0 - 800 MHz
< 66 mA @ 14.2 V
GPS off; lowest current consumption while still
being able to contact the device
CDMA BC1 - 1900 MHz
< 63 mA @ 14.2 V
GPS on
Idle (GPS on)
< 54 mA @14.2 V
Registered
Idle (GPS off)
< 33 mA @14.2 V
Registered
Low Power Sleep Mode
<1.3 mA @14.2 V
GPS off
Bench Testing / Programming
WARNING!
After performing a firmware upgrade the device will respond that the firmware load is
complete. However, power must remain applied to the device for approximately two minutes after the
firmware upgrade completion message is received. This allows time for the upgrade to be applied to
the auxiliary processor. The user can confirm it is safe to remove power by sending the AT$OBDVER?
command. If the upgrade is still processing, the device will respond with an error. If the upgrade is
complete, the device will respond with the current software version.