FM36M1 Accessories

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 FM36M1
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 FM36M1 (if sensor returns analogue signal proportional to fuel level). Figure 10 shows the connection scheme to the FM36M1 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.
Alarm buttons, door sensors etc.	Panic button connection to FM36M1
Alarm buttons, door sensors, ignition, etc. have two output states: high or low. FM36M1 Digital inputs are used to detect these states.
Relays	Inverting relay connection to FM36M1
In cases when sensor output signal is negative, an additional relay has to be installed to convert negative signal to positive.
Immobilizer relay	Immobilizer relay connection to FM36M1 output
When connected as shown on the right hand side, FM36M1 disables engine starter when output is ON.
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.
1-Wire devices	Digital thermometer DS1820 and TTJ100 connection to FM36M1
One of the implemented features on FM36M1 is 1-Wire® data protocol, which enables connection to devices such as thermometer (DS1820, DS18S20 and DS18B20) and I-Button DS1990A.
	TTJ sensor pinout
	I-Button DS1990A connection to FM36M1