FMB209 Accessories

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FMB209 Manual > FMB209 Accessories
Bw nb.png Please order accessories separately as they are not included into device package.


Accessory and its description Accessory connection schematic
Fuel tank sensors Fuel sensor connection to FMB209
A fuel tank level sensor which indicates the approximate fuel level on the driver's indicator panel exists in most cars. If the sensor returns analogue signal proportional to fuel level it can be connected to FMB209 Analog input. After connection to the tank fuel level sensor a calibration is needed because most fuel tank sensors are not linear. Calibration is performed by measuring voltage values resulting from the volume of fuel in tank.
Sch fmb20x lls.png
Alarm buttons, door sensors etc. Panic button connection to FMB209
Alarm buttons, door sensors, ignition, etc. have two output states: high or low. FMB209 Digital inputs are used to detect these states.
Sch fmb20x panic.png
Relays Inverting relay connection to FMB209
In cases when sensor output signal is negative, an additional relay has to be installed to convert negative signal to positive.
Sch fmb20x inv relay.png
Immobilizer relay Immobilizer relay connection to FMB209 output
When connected as shown on the right hand side, FMB209 disables engine starter when output is ON.
Sch fmb1yx imb relay.png
Automotive relay Automotive relay pinout
An ordinary automotive relay is used to invert input signal or to immobilize engine starter. Note that relays can be 12 V or 24 V capable.
Pic relay.png
Sch ord relay.png