| 摘要 |
PURPOSE:To share power supply board itself and each inrush preventive circuit for a feeder panel by branching a power supply line connected to the feeder panel from the power supply board through a power supply switch and the inrush preventive circuits. CONSTITUTION:Power supply lines connected to the feeder panel 253 of a device 250 from power supply boards 215, 233 are branched through power supply switches 217, 235 and surge preventive circuits 223, 241. The power lines are extracted through diodes 227, 245 for coupling. In the feeder panel 253, a DC/DC converter 255 is connected with a DC power 211 through the power line of the feeder panel 253, and a smoothing capacitor 257 is connected on the input side of the DC/DC converter 255 and a constant-current load 259 on the output side of the converter 255. Charging currents to each smoothing capacitor 221, 239, 257 of the power boards 215, 233 and the feeder panel 253 by turning the power switches 217, 235 ON are prevented by the common surge preventive circuits 223, 241. |
