SOLENOID RELAY DRIVING CIRCUIT

摘要

A solenoid relay driving circuit which generates an exciting signal for exciting a solenoid relay after confirming that a make contact of the solenoid relay is off. A forcedly operated type solenoid relay (4) where a make contact (4A) and a brake contact (4B) have a mutual complementary relation is used. A trigger input signal having a logic value (1) within a predetermined level range is fed to a trigger terminal (2b) of a self-retaining circuit (2) when the brake contact (4B) is on, that is, when the make contact (4A) is off. While this trigger input signal is applied, when an input signal IN having a logic value (1) within a predetermined level range is applied to a reset terminal (2a), the solenoid relay (4) is excited and the make contact (4A) is turned on. <IMAGE>