Back to results
US 9,755,416 B2Granted
Intrinsic safety barrier
AssigneeMSA Technology, LLC
InventorStephen M. Kancel
Life of this patent
Estimating the term…
Abstract
An improved intrinsic safety barrier arrangement for an electrical device or component. A method of intrinsic safety barrier operation for an electrical device or component is also disclosed.
Claims13
An intrinsic safety barrier comprising x barrier circuits connected in parallel, wherein each barrier circuit includes:
- a cathode node, an output node, and a ground node;
- a fuse connected between the cathode node and a Vin node of the intrinsic safety barrier;
- y Zener diodes connected in parallel between the cathode node of the barrier circuit and the ground node of the barrier circuit, an anode of each Zener diode connected to the ground node of the barrier circuit and a cathode of each Zener diode connected to the cathode node of the barrier circuit;
- and
- z blocking diodes connected in series between the cathode node of the barrier circuit and the output node of the barrier circuit and oriented to pass electrical current only from the cathode node of the barrier circuit to the output node of the barrier circuit, wherein:
- the output nodes of the x barrier circuits are coupled together to define a VDCout node of the intrinsic safety barrier;
- the ground nodes of the x barrier circuits are coupled to electrical ground;
- and
- the cathode nodes of the x barrier circuits are coupled together at the Vin node of the intrinsic safety barrier.
6 more elements
An intrinsic safety barrier comprising:
- a barrier circuit including:
- one or more Zener diodes connected in parallel between a cathode node of the barrier circuit and a ground node of the barrier circuit, the anode of each Zener diode connected to the ground node of the barrier circuit and the cathode of each Zener diode connected to the cathode node of the barrier circuit;
- one or more blocking diodes and a resistor connected in series directly between the cathode node of the barrier circuit and an output node of the barrier circuit and oriented to pass electrical current only from the cathode node of the barrier circuit to the output node of the barrier circuit;
- and
- a barrier network fuse having first and second ends, wherein the first end of the barrier network fuse is coupled to the cathode node of the barrier circuit.
2 more elements
Dependencies are inferred from the claim text.