| 摘要 |
An apparatus is adapted for self-test. The apparatus includes a microcontroller and a number of relay drivers having outputs electrically connected to form a single input for self-test monitoring. The microcontroller is electrically connected to each of the relay drivers and is adapted to energize each of the relay drivers during self-test. The results of the self-test are monitored via a single input line to the microcontroller or by a single input line to a LED.
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