Patent ID: 9628065
Date: 2017-04-18
CPC Classifications: H02H,H03K

Claim:
1. An apparatus comprising: a first switch to control power to a field device; a second switch comprising a first gate and a second gate, the second gate electrically coupled in parallel to the first gate, wherein the second switch is to provide parallel current paths through the second switch, the first and second switches defining a current path between a source of the power and the field device; a first diagnostic controller to control the first and second gates independently of one another to verify a first redundant control of the field device; a first processor to control the first switch; a third switch to control power to the field device; a fourth switch comprising a third gate and a fourth gate, the fourth gate being electrically coupled in parallel to the third gate, wherein the fourth switch is to provide parallel current paths through the fourth switch, the third and fourth switches defining a current path between the source of the power and the field device; a second processor to control the third switch; and a second diagnostic controller to control the third and fourth gates independently of one another to verify a second redundant control of the field device.