A power control circuit based on current loop communication circuit

Abstract

The invention discloses a current-loop communication loop-based power supply control circuit. One end of a voltage-dividing resistor R1 and the anode of a diode D1 are connected to a high-level loop S of a current ring communication loop; the cathode of the diode D1 is connected to the anode of a driving capacitor C1 and an input end of a relay RL; the other end of the voltage-dividing resistor R1 is connected with one end of a voltage-dividing resistor R2, the anode of a smooth capacitor C2 and the base electrode of a triode Q1; the collecting electrode of the triode Q1 is connected with the other input end of the relay RL; an output end of the relay RL is connected with a power supply; the other output end of the relay RL is connected with an accessing end of a control panel power supply; the other end of the voltage-dividing resistor R2, the cathode of the capacitor C2, the cathode of the capacitor C1 and the emitting electrode of the triode Q1 are connected a low-level loop N of the current ring communication loop. Electrification or outage of a managed circuit plate is controlled according to the communication driving capability of the current ring communication loop, and the management on each control plate power supply in a distributed power supply type multi-control plate system is facilitated.

Description

technical field [0001] The invention relates to the field of equipment with multiple control boards and distributed power supply, in particular to a power supply control circuit based on a current loop communication loop. Background technique [0002] With the development of electronic technology, home appliances and various other embedded control devices have the demand for low standby loss. reliability. [0003] Most electronic devices have several basic states, including: working state (realize function, maximum power consumption), sleep state (lowest power consumption, need to warm up or wake up before re-entering working state), standby state (between Working state and dormant state, the power consumption is also between the two, the characteristic is that it can quickly respond to enter the working state), and can switch between several states. [0004] For single control board type electronics such as figure 1 As shown in (a), the main task is: when sleeping, only ...

AI Technical Summary

Problems solved by technology

However, the circuits of these two implementations in the prior art are more complicated, the cost is higher, and it is not easy to upgrade and expand

Images