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| style="text-align: left; vertical-align: top;" | 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 {{{model|FMB640}}} 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.

| style="text-align: left; vertical-align: top;" | 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 {{{model|FMB640}}} 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.

| style="text-align: left; vertical-align: top;" | [[Image:{{{fuel_sensor|FMB640_Fuel_Sensor.png}}}|250px|center]]

| style="text-align: left; vertical-align: top;" | [[Image:{{{fuel_sensor|FMCFMM640 Fuel Sensor.png}}}|250px|center]]

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! style="text-align: left; vertical-align: top;" | Alarm buttons, door sensors etc.

! style="text-align: left; vertical-align: top;" | Alarm buttons, door sensors etc.

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| style="text-align: left; vertical-align: top;" | Alarm buttons, door sensors, ignition, etc. have two output states: high or low. {{{model|FMB640}}} Digital inputs are used to detect these states.

| style="text-align: left; vertical-align: top;" | Alarm buttons, door sensors, ignition, etc. have two output states: high or low. {{{model|FMB640}}} Digital inputs are used to detect these states.

| style="text-align: left; vertical-align: top;" | [[Image:{{{panic_button|FMB640_Panic_button.png}}}|400px|center]]

| style="text-align: left; vertical-align: top;" | [[Image:{{{panic_button|FMCFMM640 Panic button.png}}}|400px|center]]

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! style="text-align: left; vertical-align: top;" | Relays

! style="text-align: left; vertical-align: top;" | Relays

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| style="text-align: left; vertical-align: top;" | In cases when sensor output signal is negative, an additional relay has to be installed to convert negative signal to positive.

| style="text-align: left; vertical-align: top;" | In cases when sensor output signal is negative, an additional relay has to be installed to convert negative signal to positive.

| style="text-align: left; vertical-align: top;" | [[Image:{{{inv_relay|FMB640_inv_relay.png}}}|400px|center]]  

| style="text-align: left; vertical-align: top;" | [[Image:{{{inv_relay|FMCFMM640 inv relay.png}}}|400px|center]]  

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! style="text-align: left; vertical-align: top;" | Immobilizer relay

! style="text-align: left; vertical-align: top;" | Immobilizer relay

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| style="text-align: left; vertical-align: top;" rowspan=5 | {{{oneWire|One of the implemented features on {{{model|FMB640}}} is 1-Wire® data protocol, which enables connection to devices such as thermometer (DS1820, DS18S20 and DS18B20) and I-Button DS1990A. }}}

| style="text-align: left; vertical-align: top;" rowspan=5 | {{{oneWire|One of the implemented features on {{{model|FMB640}}} is 1-Wire® data protocol, which enables connection to devices such as thermometer (DS1820, DS18S20 and DS18B20) and I-Button DS1990A. }}}

| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{DS1820|FMB640_DS1820.png}}}|400px|center]] }}}

| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{DS1820|FMCFMM640 DS1820.png}}}|400px|center]] }}}

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| style="text-align: left; vertical-align: top;" | {{{oneWire| TTJ sensor pinout }}}

| style="text-align: left; vertical-align: top;" | {{{oneWire| TTJ sensor pinout }}}

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| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{TTJ|FMB640_TTJ.png}}}|400px|center]] }}}

| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{TTJ|FMCFMM640 TTJ.png}}}|400px|center]] }}}

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! style="text-align: left; vertical-align: top;" | {{{oneWire| I-Button DS1990A connection to {{{model|FMB640}}} }}}

! style="text-align: left; vertical-align: top;" | {{{oneWire| I-Button DS1990A connection to {{{model|FMB640}}} }}}

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| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{DS1990A|FMB640_DS1990A.png}}}|400px|center]] }}}

| style="text-align: left; vertical-align: top;" | {{{oneWire| [[Image:{{{DS1990A|FMCFMM640 DS1990A.png}}}|400px|center]] }}}

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! style="text-align: left; vertical-align: top;"| Impulse counters

! style="text-align: left; vertical-align: top;"| Impulse counters