ELECTRONIC KEYING SYSTEM AND METHOD FOR MULTIPLEX BOARD SYSTEM

摘要

PURPOSE: To secure the suitable unit constitution of boards by sending power turn-on signals with a special constitution connector route for respective boards and inhibiting the turn-on of power supply with an unsuitable power constitution. CONSTITUTION: The respective boards #1 and #2 have multiple circuits constituting a computer system. Diodes 21 are connected to the pins of the connector 20 on the board #2. Conduction is possible in accordance with a cord peculiar to the board #2 with the polarity of the diodes 21. Conductors 22 on the board #1 of the connector 20 are wired in accordance with a direction. The diodes 21 are arranged so that current flow toward a power controller 24 from a power source 23 through the diodes in a front direction. When the wiring of the board #1-side does not correspond to the coding of the diodes 21 on the board #2-side of the connector 20, a series route is blocked by the diodes which are inversely connected and the power source 23 is not connected to the power controller 24, the power controller 24 is not started.