Time relay action:
When the input signal is added or removed, the output part needs to be delayed or limited to the specified time to close or disconnect the relay of the controlled line. For the precise control of a mechanical device or component products.
In general, the 1 power supply circuit time relay is a high impedance, therefore, cut off the leakage current after the power to be as small as possible (with RC and semiconductor or connected to the contact switch, a time relay) to avoid induction voltage and false shutdown caused by misoperation (for power-off delay type, will delay time after the power to relay but does not release the phenomenon).
2. Under normal circumstances, the residual voltage of the power terminal should be less than 20% of the rated voltage, and the delay time of the power supply should be less than 7% of the rated voltage. After the completion of the control of the relay, as far as possible to avoid continued power. When continuous electricity makes the product heat, thus speeding up the aging of electronic components, greatly shorten the service life.