RBD-252 speed relay Karosa with connector

The relay can be connected to the output from the impulse output sensor or at the output of the tachograph D3, B7. The relay closes at a speed more than 3km / h and switches off at a speed less than 2.5km / h. When the speed is reduced, the maximum relay delay (relay deactivation) is 1s. The car's speed at which the relay is switched depends on the constant C.

The vehicle speed at which the switch is switched on can be set on request by the customer. There is no switching, expansion at decision speed (relay speed) on the relay. This unwanted state is avoided by hysteresis that can be set.