A pool or spa control system includes a sensor system with one or more sensors in contact with a main body of water. The sensor system measures water condition data of the body of water and is mounted on a wall submerged in the main body of water. The pool or spa control system also includes a modem that facilitates data communications between the sensor system and communication equipment positioned at a different location from the main body of water.

The present invention is directed to a system and method of remotely controlling a welding machine with command signals transmitted to the welding power source across a weld cable connecting the power source to a remote device, such a wire feeder. A transmitter transmits the control commands containing desired welding operational parameters to a receiver disposed in the power source across a weld cable also designed to carry welding power from the power source to the wire feeder.

An address system for at least one fire loop 20 includes at least one remote unit 14, 16, 18 and an address card 102. The remote unit 14, 16, 18 is for installation on the fire loop 20 and for addressable communication via the fire loop 20. The address card 102 is for use with the remote unit 14, 16, 18 in order to provide an address for the remote unit 14, 16, 18. The address card 102 includes one or more of a plurality of optically recognisable colour elements 201-210 for encoding an address. The remote unit 14, 16, 18 includes an optical sensor 116 for identifying colour characteristics of the optically recognisable colour elements 201-210, and a control system 118 for determining the address from the colour characteristics.

An amplifier circuit acting as a line driver in a line between a central station and field devices connected thereto comprising: a DC/DC converter integrated in the circuit as a power stage comprising a DC/pulse converter with two electrically isolated switching stages; a logic block preceding the converter, generating control signals for the switches from a PWM signal and feeding them into the converter in an electrically isolated manner using drivers; a priority block generating the PWM signal; a first and a second controller. The priority block forwards output from the first or second controller. The first controller generates a fault signal based on a voltage limit and an output voltage fed back within the amplifier circuit via a feedback path. The second controller generates a fault signal based on a current limit and the output current. The central station defines the current limit and the voltage limit.

The present disclosure relates to a signal transmission method, system, device, a storage medium and an electronic device. The method includes: determining data to be transmitted by a unit in air conditioning units; and transmitting, by the unit, the data to be transmitted to other units through a designated power line in multiphase power lines, wherein the designated power line is any power line in the multiphase power lines, and the designated power line is a power line shared by all units in the air conditioning units.

This disclosure discloses a communication implementation method and device for air conditioning units, a storage medium and a processor. The method includes: acquiring a channel state of a current power line carrier channel used between units in an air conditioning system; and determining whether to switch the channel between the units from the current power carrier channel to a next power carrier channel according to the channel state, wherein the next power carrier channel is any one of power carrier channels other than the current power carrier channel in the air conditioning system.

A system for providing powerline communication over flexible mesh for circuit design used in biometric monitoring is disclosed. In particular, the system provides for the transmission of power and data over the same circuit infrastructure, and integrates the ability to transfer data over an infrastructure that also transmits power. Notably, the system facilitates the integration of data over power in flexible systems, such as systems incorporating flexible mesh sensors and flexible geometric systems. The dual use of power infrastructure reduces weight and increases flexibility and potential sensor density. The systems use of data over power significantly reduces or eliminates the needs for a standalone data bus, thereby reducing the design complexity of the circuit.

A downhole system has a plurality of telemetry systems and a control system configured to obtain information from one or more sensors and transmit that information on one or more of the plurality of telemetry systems. The configuration of a controller may be changed so as to change which information is transmitted on a given telemetry system and how the information is to be transmitted on the given telemetry system.

A system and method for automated shutdown, disconnect, or power reduction of solar panels. A system of solar panels includes one or more master management units (MMUs) and one or more local management units (LMUs). The MMUs are in communication with the LMUs with the MMUs and LMUs “handshaking” when the system is in operation. The MMUs are connected to one or more controllers which in turn are connected to emergency detection sensors. Upon a sensor detection of an emergency, the associated MMU is notified which in turn instructs associated LMUs to take appropriate action. In the event that communication with the MMUs has been cut off, the LMUs take the initiative to shut down, disconnect, or reduce the output of associated string(s) of solar panels.

An electronic device, a cable, and a method of driving the same are provided. The cable that transmits data and power includes a notification device comprising notification circuitry configured to output a notification when the power is transmitted, a first connector positioned at one end of the cable, a second connector positioned at an other end of the cable, a wire connecting the first and second connectors and including a data line that transmits the data and a power line that transmits the power, and a cable controller connected to the power line and configured to identify a characteristic of power transmitted through the power line and to change a form of the notification output from the notification device based on the identified power characteristic.