Barrier lowering initiation system for a level crossing gate drive

Abstract

The barrier lowering initiation system for a barrier drive, intended especially for barrier drives without return springs, is characterized in that it is composed of a relay (P) connected to the supply voltage (Uz), the first normally closed contact (A1-B1) of which is connected by point (A1) to the cathode of the diode (D) and to the electrode (1) of the capacitor (C), and point (B1) is connected to point (3) of the limit switch (KG), the point (4) of which is connected to point (5) of the motor (M) and to the common point of the first downward movement contact (D1) and the second upward movement contact (G2), while the second normally closed contact (A2-B2) of the relay (P) is connected by point (A2) to the electrode (2) of the capacitor (C) and to the supply minus, and point (B2) to the common point of the first upward movement contact (G1), the second downward movement contact (D2) and to point (6) of the motor (M).