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{| class="wikitable"
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! style="width: 400px; background: black; color: white;" | Accessory and its description
! style="width: 300px; background: black; color: white;" | Accessory and its description
! style="width: 400px; background: black; color: white;" | Accessory connection schematic
! style="width: 500px; background: black; color: white;" | Accessory connection schematic
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! style="text-align: left; vertical-align: top;" | 1-Wire devices
! style="text-align: left; vertical-align: top;" | 1-Wire devices
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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|FMB1YX}}} 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|FMB1YX}}} 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:Sch_fmb1yx_lls.png|200px|center]]
| style="text-align: left; vertical-align: top;" | [[Image:Sch_fmb1yx_lls.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;" | Relays
! style="text-align: left; vertical-align: top;" | Relays
! style="text-align: left; vertical-align: top;" |
! style="text-align: left; vertical-align: top;" | Inverting relay connection
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| style="text-align: left; vertical-align: top;" rowspan=2 | 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:Sch_fmb1yx_inv_relay.png|400px|center]]
| style="text-align: left; vertical-align: top;" | [[Image:Sch_fmb1yx_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