Changes

* If the wires are placed in the exterior or in places where they can be damaged or exposed to heat, humidity, dirt, etc., additional isolation should be applied and the wires should not be loose.

* If the wires are placed in the exterior or in places where they can be damaged or exposed to heat, humidity, dirt, etc., additional isolation should be applied and the wires should not be loose.

* Wires cannot be connected to the board computers or control units.

* Wires cannot be connected to the board computers or control units.

Connecting power source:

Connecting power source:

* It is recommended to connect to the main power cable in the fuse box.

* It is recommended to connect to the main power cable in the fuse box.

* 3 A, 125 V external fuse shall be used.

* 3 A, 125 V external fuse shall be used.

Connecting ignition wire:

Connecting ignition wire:

* Check if power is still available when you turn off any of vehicles devices.

* Check if power is still available when you turn off any of vehicles devices.

* Ignition is connected to the ignition relay output. As alternative, any other relay, which has power output when ignition is on, may be chosen.

* Ignition is connected to the ignition relay output. As alternative, any other relay, which has power output when ignition is on, may be chosen.

Connecting ground wire:

Connecting ground wire:

* If the wire is fixed with the bolt, the loop must be connected to the end of the wire.

* If the wire is fixed with the bolt, the loop must be connected to the end of the wire.

* For better contact scrub paint from the spot where loop is going to be connected.

* For better contact scrub paint from the spot where loop is going to be connected.

[[File:Alert.png|link=|50px]] || <b>NOTE: PAY ATTENTION! Connecting the power supply must be carried out in a very low impedance point of on-board vehicle network. These points in the car are the battery terminals. Therefore, we recommend connecting the power of FMB640 (GND and POWER wires) directly to the battery terminals. Another valid option is to connect the wires to the main POWER cable inside the fuse box (if there is none, then to the power supply where the fuses of vehicle’s computer are), GND wire must be connected in a special point, designed to connect GND vehicle computer. Connecting the GND at an arbitrary point to the mass of the car is unacceptable, as static and dynamic potentials on the line GND will be unpredictable, which can lead to unstable FMB640 operation and even its failure.

[[File:Alert.png|link=|50px]] || <b>NOTE: PAY ATTENTION! Connecting the power supply must be carried out in a very low impedance point of on-board vehicle network. These points in the car are the battery terminals. Therefore, we recommend connecting the power of FMB640 (GND and POWER wires) directly to the battery terminals. Another valid option is to connect the wires to the main POWER cable inside the fuse box (if there is none, then to the power supply where the fuses of vehicle’s computer are), GND wire must be connected in a special point, designed to connect GND vehicle computer. Connecting the GND at an arbitrary point to the mass of the car is unacceptable, as static and dynamic potentials on the line GND will be unpredictable, which can lead to unstable FMB640 operation and even its failure.