STRAIGHT FORWARD REMOTE OBSERVATION CONTROL SYSTEM

摘要

PURPOSE:To provide a built-in transistor and zener diode in the circuit for preventing from error operation caused by current fluctuation without limitation of the actuation sensitivity of relay. CONSTITUTION:Zener diodes ZD 1, ZD 2 are provided for the base circuit of transistors Q1, Q2 which actuate the condition receiving relays RY 1, RY 2 of the control station 1 through resistance elements R1, R2. When on-operation switch CS is closed, on-control coil RY 12 is acted only relay RY 2 of control station 1 being acted to light a making indicating lamp R when the station 2 to be controlled is turned on-condition. When off-operation switch TS is closed, coil RY 11 is acted to allow the station to be controlled 2 to turn off-condition, the control station 1 acting only relay RY 1 for the lamp G to indicate opening. With disorderly condition, both of relays RY 1, RY 2 are actuating for the lamp O to light.