| 摘要 |
PURPOSE:To keep the size small and to maintain a fail-safe performance by comparing output signals of two computers, inputting compared results to the computers, outputting a fault detection signal when the output signals are not coincident, and inhibiting an external output. CONSTITUTION:CPUs 1, 2 similarly calculate received signals. When results compared by the use of a coincidence detection circuit 6 coincide, the signals are output to a relay 8 through an amplifier 7, and fed back to the CPUs 1, 2. The CPUs 1, 2, when input and output signal discordance is detected, output signals to a fault detection relay 9 to inhibit external output of all the signals. Thus, even if the output signals are increased, an additional circuit is not necessarily provided to maintain a small size and to maintain a fail-safe performance. |
