# US 9,520,599 B2 · Modular intrinsically-safe field device power module

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- Number: US 9,520,599 B2
- Document ID: US9520599B2
- Status: Granted
- Kind: B2
- Application number: 14/709,797
- Filed: 2015-05-12
- Published: 2015-08-27
- Granted: 2016-12-13
- Earliest claimed: 2010-01-13
- Assignees: Rosemount Inc.
- Applicants: Rosemount Inc.
- Inventors: Chad M. McGuire
- Web page: https://patentgrep.com/patent/US9520599B2

## CPC

- H05K 7/1462: {for programmable logic controllers [PLC] for automation or industrial process control}
- H01M 6/50: Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H01M 50/1535: {adapted for specific cells, e.g. electrochemical cells operating at high temperature}
- H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence)
- H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
- H01R 33/945: Holders with built-in electrical component
- H01R 33/95: with fuse; with thermal switch
- H01M 2200/00: Safety devices for primary or secondary batteries
- H01M 2200/103: Fuse
- H02B 1/00: Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B 1/06: having associated enclosures, e.g. for preventing access to live parts
- Y02E 60/10: Energy storage using batteries
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A modular, intrinsically-safe power module assembly is provided. The assembly includes a rigid conduit adapter configured to mount to a conduit of a field device. A housing, having an interior, is operably coupled to the rigid conduit adapter and is physically supported by the rigid conduit adapter. At least one non-rechargeable battery is disposed within the housing. Intrinsic safety circuitry is coupled to the at least one non-rechargeable battery, and is coupled to a connector that mates with a cooperative connector in the rigid conduit adapter.

## Claims

### Claim 1

A wireless field device for use in an industrial process, comprising:
a field device housing configured to contain a process variable sensor and mount proximate a process installation and including an electronics compartment having a conduit entry formed therein;
a cable assembly having a first end configured to mount to the conduit entry of the field device;
a remote mounted battery pack coupled to a second end of the cable assembly, the remote mounted battery pack having an interior;
at least one non-rechargeable battery disposed within the remote mounted battery pack; and
intrinsic safety circuitry coupled to the at least one non-rechargeable battery, the intrinsic safety circuitry being coupled to the cable assembly and thereby power the wireless field device with power from the at least one non-rechargeable battery.

### Claim 2 (depends on 1)

The wireless field device of claim 1, wherein the interior of the remote mounted battery pack is filled with a potting compound.

### Claim 3 (depends on 1)

The wireless field device of claim 1, wherein the intrinsic safety circuitry includes a fuse.

### Claim 4 (depends on 3)

The wireless field device of claim 3, wherein the intrinsic safety circuitry includes current-limiting circuitry to limit current through the fuse.

### Claim 5 (depends on 1)

The wireless field device of claim 1, wherein a volume of the interior of the remote mounted battery pack is larger than an interior of the electronics compartment of the field device.

### Claim 6 (depends on 1)

The wireless field device of claim 1, wherein the at least one-non-rechargeable battery includes a plurality of non-rechargeable batteries disposed within the remote mounted battery pack.

### Claim 7 (depends on 6)

The wireless field device of claim 6, wherein the plurality of batteries are replaceable.

### Claim 8 (depends on 1)

The wireless field device of claim 1, wherein the at least one non-rechargeable battery is replaceable.

### Claim 9 (depends on 1)

The wireless field device of claim 1, wherein the cable assembly is threadably received by the conduit entry of the field device.