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Fuel Tank sensors for FM3620_C1 or FM3620_C2
A fuel tank level sensor exists in most cars, which shows the approximate fuel level in the
driver’s indicator panel. It is possible to connect Analog input to FM3620_C1 or FM3620_C2 (if
sensor returns analogue signal proportional to fuel level). As input shares the same PIN with
Digital input 2, FM3620_C1 or FM3620_C2 must be configured to use only one of them. Figure 10
shows the connection scheme to the FM3620 and fuel tank sensor through Analog input 1. After
the connection to the tank fuel level sensor, calibration is needed. Calibration is needed because
most fuel tank sensors are not linear. Calibration is performed by measuring voltage dependence
on volume of fuel in tank.
Figure 10. Fuel Tank sensor connection
Alarm buttons, door sensors, etc.
Alarm buttons, door sensors, ignition, etc. return two states: high or low voltage. Digital
inputs are used to read this information. Figure below shows how to connect alarm button, door
sensor, etc.
Figure 11. Panic button connection
Содержание FM3600
Страница 1: ...FM3620 User Manual V1 5 ...
Страница 10: ...10 Figure 1 FM3620 view dimensions tolerance 2mm ...