| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make an equipment system communicable between each equipment via communication circuits applied to each equipment constituting a hot water supply system by constructing the same electric circuit for every equipment. <P>SOLUTION: This equipment system is provided with the equipments 100, 110, power wires 150a, 150b, a communication wire 160 arranged in parallel to the power wires 150a, 150b, and communication circuits 120b, 140b provided individually in the equipments 100, 110 and connected in parallel to the communication wire 160 and the power wires 150a, 150b for communication between the equipments 100, 110 via the communication wire 160. The communication circuits 120b, 140b have transmission photocouplers 202a, 202b for transmitting transmission signals superimposed on power voltage via the communication wire 160 in accordance with AC power voltage and reception photocouplers 206a, 206b for receiving reception signals superimposed on AC power voltage via the communication wire 160, respectively. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
