Connection for electric throttle lever control with 4–20 mA output signal c) Connection for start blocking system The start blocking system ensures that the engine cannot be started when the gearbox is in mesh. This function is normally realised by an internal relay in the throttle lever control system (e.g. Rexroth Mecman Mini-Marex-C system, Mathers Clear Command, ...). The connection to the engine is made at terminals 50g and 50h in the MAN terminal box (see diagram). Here a bridge is fitted as standard; this bridge must be removed when the start blocking system is connected up.
When the gearbox is in mesh the connection between terminals 50g and 50h must be interrupted by the throttle lever control system. This prevents triggering of the starter lock relay; the starter motor can then not be actu- ated. If the throttle lever control system used allows for the start blocking function, we recom- mend you connect this up for reasons of safety. Diagram: Kl.50g Terminal box Connection for start blocking system for throttle lever Kl.50h Remove bridge if start blocking system is connected up 98