| 摘要 |
PURPOSE:To prevent a load from being turned off even if a signal ON is sent out of a CPU when the load is turned on at a different point by adding a Y relay for operation monitoring to a remote control relay. CONSTITUTION:When respective contacts are as shown by solid lines, a push button switch 42 provided near the load L is turned on, and then a closed loop is formed including a power source 7, push botton switch 42, movable contact 55c, contact 55b, diode 51, R relay 57, and diode 54. Consequently, a contact 56 is made to put the load L in operation, and the contact 21a and movable contact 21c of a signal repeating circuit 2 are made with a contact 21b and a movable contact 21c off to prevent the signal ON from the CPU from being repeated. |
