| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable switching a power source corresponding to the interface standard of a prescribed interface device in both the case that an internal electric power source is connected to a prescribed interface drive and the case that an external power source is connected. SOLUTION: This device is equipped with an internal power source terminal 11 which can be connected to the internal power source, external power source terminals 23, 24 and 25 which can be connected to the external power source, power lines connected to the internal power source terminal 11 and/or external power source terminals 23, 24 and 25, and a switching control means which performs switching to the power line for supplying the internal electric power from the internal power source terminal 11 to the external power source terminals 23, 24 and 25 when the internal power is supplied from the internal power source terminal 11 and to the power line for supplying the external power from one of the external power source terminal 23, 24 and 25 to other external power source terminals when the external power is supplied from he external power source terminal.</p> |
