| 摘要 |
PURPOSE:To enable circuit interface polarity conversion, display supervision or state hysteresis tracing by selecting a random circuit connecting mechanism at need and then by connecting a circuit interface polarity conversion switch and display element. CONSTITUTION:Circuit connecting mechanism 2-0-2-n are connected to common control circuit 1 via an interface IF line. To circuit IF polarity conversion IF terminal 7 of mechanisms 2-0-2-n to be tested and diagnosed, receiving line ''0'' set switch 9 and receiving line ''1'' set switch 10 are connected via receiving line ''0'' set line 701, receiving line ''1'' set line 702 and signal earth line 703, and to display supervisory IF terminal 8, display element 11 or a tracer is connected via display supervisory lines 801 and 802 for a transmitting line and receiving line and signal earth line 803. Consequently, the disconnection indication, connection indication, release request function operation, etc., can be confirmed through the manual operations of switches 9 and 10, and states of transmitting line 601 and receiving line 602 can be supervised by element 11. |
