发明授权
- 专利标题： Process control field device with circuitry protection
- 专利标题（中）： 具有电路保护功能的过程控制现场设备
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申请号： US13285307申请日： 2011-10-31
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公开(公告)号： US09124096B2公开(公告)日： 2015-09-01
- 发明人: James A. Johnson , Richard L. Nelson
- 申请人： James A. Johnson , Richard L. Nelson
- 申请人地址： US MN Eden Prairie
- 专利权人： Rosemount Inc.
- 当前专利权人： Rosemount Inc.
- 当前专利权人地址： US MN Eden Prairie
- 代理机构： Westman, Champlin & Koehler, P.A.
- 主分类号： H02H3/00
- IPC分类号： H02H3/00 ; H02H11/00 ; H02J7/00 ; H02H3/20 ; H02H3/18
摘要：
A wireless field device for use in an industrial process control system includes a power source having a power source output. Field device is circuitry powered by the power source output. A protection circuit is configured to protect the field device circuitry. The protection circuit include reverse polarity protection circuit coupled to the power source output that electrically isolates the power source output from the field device circuitry in response to a reverse polarity connection between the power source output and the field device circuitry. An overvoltage protection circuit disconnects the power source output from the field device circuitry is a voltage of the power source output exceeds a threshold.
公开/授权文献
- US20130107406A1 PROCESS CONTROL FIELD DEVICE WITH CIRCUITRY PROTECTION 公开/授权日：2013-05-02
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