| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply unit that performs heatup only when effective power can be applied to a heater by power supply input, and automatically starts a network camera system after the heatup. <P>SOLUTION: A power supply unit includes power supply input parts 16 and 17 where 24-VAC power supply and 12-VDC power supply can be input. When a power supply determination part 22 determines that power supply input to the power supply input parts is 24-VAC power supply, an MCU 21 controls heaters 1 and 2 according to a temperature detected by a temperature detection part 3. On the other hand, when the power supply determination part 22 determines that power supply input to the power supply input parts is not 24-VAC power supply, the MCU 21 does not control the heaters 1 and 2 according to a temperature detected by the temperature detection part 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
