| 摘要 |
PURPOSE:To enable the monitoring of the electric source output in case the number of the power source board using i parallel are increased and to easily detect an output abnormality of the power source board with a simplified circuit by increasing the number of a diode combination of the abnormality monitoring circuit of the power source output. CONSTITUTION:By using the power source boards 1(1) and 1(2) of a diode coupling type, its power source outputs are specified as V1, V2. This output V1 is connected through the diode D1 with a load circuit, and through the diode D3 (inverse polarity connection) with the monitoring point d. Also, the output V2 is connected through the diode D2 with the load circuit, and through the diode D4, D5 being connected in series with the point (d) and an impedance being subjected to the power source supply abnormality monitoring . detecting circuit 60a from the point (d) in a power source output supply circuit 20a is brought in a high impedance. And, when the load circuit occurs the abnormality the voltage V4 of the point (d) becomes equal to the output voltage V3, thus detecting at the circuit 60 and when the abnormality is occurred in outputs V1, V2, the voltage across the diodes D1, D4+D5 become the voltage of the point (d), thus detecting in the circuit 60a. |
