发明名称 |
Intrinsically safe portable programmer for enclosed electronic process control equipment |
摘要 |
An intrinsically safe portable programmer for communicating with the electronic process control equipment over a wireless communication link. The portable programmer comprises a microprocessor controlled electronic circuit housed in an enclosure formed from a polymers polystyrene having a low surface resistivity. The electronic circuit is mounted inside the enclosure with a low voltage battery supply and encased in epoxy to prevent sparking. The electronic circuit includes an infrared transmitter and a keypad. In response to keypad inputs, the electronic circuit generates control signals which are transmitted to the electronic process control equipment via the infrared transmitter.
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申请公布号 |
US2002135989(A1) |
申请公布日期 |
2002.09.26 |
申请号 |
US20010811668 |
申请日期 |
2001.03.20 |
申请人 |
PRESTON NIGEL ASHLEY;GRAY ROBERT WILLIAM |
发明人 |
PRESTON NIGEL ASHLEY;GRAY ROBERT WILLIAM |
分类号 |
H01H9/00;H01H9/02;(IPC1-7):H05K5/00;H05K7/04 |
主分类号 |
H01H9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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