Two-wire non-polar connected power supply and communication circuit

Abstract

The invention discloses a two-wire non-polar connected power supply and communication circuit applied in the field of remote controllers used in home appliances (such as water-mounted furnaces, water heaters and the like), solar energy and the like. The circuit comprises a liquid crystal 2 (LC2) module circuit connected on a host and a liquid crystal 1 (LC1) module circuit connected on a remote controller, and the LC1 circuit is connected with the LC2 circuit by using a cable, the length of which can be 50 meters or more. The LC2 of the host part is throttled through a Q10 adjusting tube to prevent overload caused by short circuit of two connecting wires from damaging the circuit; and the LC1 of the remote controller part performs non-polar conversion on electrical energy and signals transmitted by the two wires by adopting a bridge rectifier, and corresponding direct-current power supplies are obtained through a D1 for charging and filtering an EC1 capacitor and a U1 voltage adjustor. The circuit solves the problems of more connecting wires and specified connection in the traditional connection mode, and reduces the cost of cables and the installation technology requirement of construction personnel.

Description

technical field [0001] The object of the present invention is to realize a circuit that not only provides power but also communicates data on two lines by performing pulse modulation on the power line. Background technique [0002] In the field of home appliances (such as wall-mounted boilers, water heaters, etc.), solar energy, etc., where remote controls are used, due to product installation and use environment requirements: not only the host body and the manual interface - the remote control are separated, but also the separation distance is relatively long (100 meters), there are obstacles (multi-layer walls). The communication between the host body and the remote controller has always been realized by using RS-232 or a simple serial port asynchronous communication circuit. [0003] The traditional RS-232 or simple serial port asynchronous communication circuit requires two communication lines from the host to the remote control for communication between them, and an a...

AI Technical Summary

Problems solved by technology

[0004]The above-mentioned traditional connection method not only has many connecting wires but also has to be connected according to the regulations, resulting in high cost of cables and high requirements for construction personnel's installation technology

Another: If the host computer provides a direct power connection to the operator through a cable, the too long power cable is easily disturbed by the space, which will cause abnormal operation

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