Relay unit, control method for relay unit |
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| 申请号 | US14881858 | 申请日 | 2015-10-13 | 公开(公告)号 | US09997316B2 | 公开(公告)日 | 2018-06-12 |
| 申请人 | OMRON Corporation; | 发明人 | Tetsuya Fukumoto; Toshiyuki Higuchi; Kohei Murakami; Keishi Yayama; Satoshi Fujii; | ||||
| 摘要 | The reliability of testing a normally closed contact in a relay unit may involve the following. While the load is de-energized, sending a test signal to a normally closed contact (b1, b2) and detecting the state of the returning test signal sent. Resending a test signal when a detection result does not satisfy a predetermined criteria, and re-detecting the state of the returning test signal resent. The state of the returning test signal resent may be assessed as normal when the re-detection result satisfies the predetermined criteria. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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