| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent malfunction in inserting/extracting the live-line of a sub- package by providing two photocouplers functioning as switches in the sub- package. SOLUTION: The sub-package 10 which has a primary-side voltage source, mounts a main package 15 and have connectors 11 and 12, an on-board power source 13, a secondary-side circuit 14, the photocouplers 1 and 2 and resistances 3 and 4 are mounted so that it can be inserted/extracted. When the connector pins of the connectors 11 and 12 are connected to all the live-line inserting/ extracting circuits, current flows in the photocouplers 1 and 2, the signal of package mounting information indicating that the mounting of the sub-package is completed is transmitted from the on-board power source to the main package.</p> |
