| 摘要 |
<p>PURPOSE:To detect a cable not being left unconnected without providing a core for unloading detection in a signal cable by connecting a pin which is connected to a voltage detecting circuit to a pin connected to a constant voltage source through a cable connector. CONSTITUTION:At least one of plural pins a1-a20 (e.g. pins a7, a15, and a20) among plural pins a1-a20 of a card connector 7 mounted on a signal processing part 30 is connected to the constant voltage source in the processing part 30, another pin, e.g. a1 is connected to the input of a voltage detecting circuit 20 through a signal line S1, and a cable connector 8 is fitted in and connected to the connector 7. In this case, the pins (a7, a15, and a20) connected to the constant voltage source and the pin a1 connected to the circuit 20 are connected mutually in a connector 8. Consequently, the mounting of the connector 8 is detected by the circuit 20. Therefore, the core for cable nonconnection detection is not necessary for the signal cable between the processing part 30 and another signal processing part.</p> |
