| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication apparatus which is connectable with a plurality of communication devices and suppresses useless power consumption in outputting an electric signal. <P>SOLUTION: Remote controllers 50a, 50b are connected between a signal line 100 and a common line 101 via a resistance component 83, and a receiving circuit 82 is included which receives an electric signal in accordance with the level of a current flowing to the resistance component 83. A hot-water supplier 1 is connected between the signal line 100 and the common line 101 via a resistance component 33 and comprises a connected device number grasping means 11 which grasps the number of communication devices connected between the signal line 100 and the common line 101 via the resistance component 33, and a transmission output control means 12 which controls the output level of the electric signal of a transmitting circuit 31 using a transmission output change circuit 20 in accordance with the number of connected communication devices. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
