Intrinsically safe portable programmer for enclosed electronic process control equipment
US6795319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2001 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Mar 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.