Circuit arrangement for control and monitoring of electrical lighting devices in trailer vehicles, has protective diode connected between load side connection of each power switch and common line

摘要

The circuit arrangement has supply lines (V1,V2) leading from the tractor vehicle via high-side FET power switches (T1-T3) to electrical lighting devices (G1-G3), decoupling diodes (DE1-DE3) feeding voltage signals from the supply lines to a common line (S) from which the operating voltage for a microprocessor (MC), which controls the power switches, is derived. A protective diode (DS1-DS3) is connected between the load side connection of each power switch and the common line.