RBD-R-80KM speed adapter SOR
The RBD-R-80km speed adapter is used in the bus installation if it is not installed in the tachograph car. The car's speed is displayed using a speedometer. Engine electronics require a precisely defined signal from the tachograph. This signal is generated by a combination of vehicle speed and vehicle constant. If the engine electronics do not receive this signal, the motor malfunctions and the engine flicker is limited.
The speed adapter has connectors that are identical to the tachograph (the tachograph can be swapped quickly behind the speed adapter). On the speed adapter, a car constant in the K = 6000 to 15000 range can be set using a resistor trimmer.