Teltonika FM4200 User Manual page 13

Left row of pins
1W. PWR
1
(FM4200 – pin3)
1W. Data
2
(FM4200 – pin13)
GND 3
(FM4200 – pin1)
Digital Input 4
4 Figure Digital thermometer DS1820 and TTJ 100 connection scheme
5 Figure Digital key "I-Button" DS1990A connection scheme
Fuel Tank sensors
A fuel tank level sensor exists
in most of the cars, which shows the
approximate fuel level in the driver's
indicator panel. It is possible to
connect FM4200 Analog input (if
sensor returns analogue
proportional to fuel level). Figure
describes the connection scheme to
the FM4200 and fuel tank sensor.
After the connection to the tank fuel
level sensor, calibration is needed.
Calibrations needed due of the fact
that most fuel tank sensors are not
linear. Calibration
performing by measuring voltage
dependence on volume of fuel in
tank.
signal
is being
Right row of pins
Vpp (+5 Volts DC)
– power source for
1
external digital
sensor
Output from
2
external digital
sensor
13