| 摘要 |
PURPOSE: To change the position and distribution number of Input/Output connectors, and select a low-frequency pass function between the Input/Output connectors. CONSTITUTION: A mother board 5 fixed to the internal section of a case body 1 as a branch unit mounting section 9 with relay terminals 9a, 9b, 9c, 9d connectable to each of connectors 3, 4 and 5 via a junction circuit 12. Furthermore, a branch unit 6 with connection terminals 13 and 14 is mounted on the section 9, in order to be capable of selecting an object for connection to the terminals 9a to 9d, and the branch terminal 15 of the unit 6 is connected to the input terminal 20 of a tap plate 7 assembled with a lid body 8 as integral part thereof, and covered with the lid body 8. Also, the mother board 5 is provided with sockets 10 and 11 having plug-in terminal 10a, 10b, 11a and 11b connected to the connectors 3 to 5. In addition, constitution is so made that plugs 17 and 18 with a low-frequency pass circuit 19 can be mounted on the sockets 10 and 11.
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