Patent ID: 8081413
Filing Date: 2011-12-20
Classification: H02H,H04L

Abstract:
1. A computer-based system with an intrinsically safe barrier for Ethernet communication in a hazardous area comprising: a. a fuse receiving an unsafe Ethernet signal from a first network device; b. a voltage clamping device comprising: c. a current limiting resistance, wherein a value of said current limiting resistance depends on a clamping voltage value associated with said voltage clamping device, and said first anti parallel diode pair only electrically connected to said fuse, said current limiting resistance, said second anti parallel diode pair, said third anti parallel diode pair, and said fifth anti parallel diode pair; said third anti parallel diode pair only electrically connected to said first anti parallel diode pair, said fourth anti parallel diode pair, said fifth anti parallel diode pair, said fuse, and said current limiting resistance; said fifth anti parallel diode pair only electrically connected to said first anti parallel diode pair, said third anti parallel diode pair, said sixth anti parallel diode pair, said fuse, and said current limiting resistance; said intrinsically safe barrier clamping input voltage and limiting short circuit current to provide an intrinsically Ethernet safe signal as an output to a second network device.