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INTRINSICALLY SAFE BATTERY/RADIO INTERLOCK SAFETY FEATURE

IP.com Disclosure Number: IPCOM000006833D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-06
Document File: 1 page(s) / 46K

Publishing Venue

Motorola

Related People

Michael Macaluso: AUTHOR [+2]

Abstract

Many safety organizations require that portable radios or communication devices be operated only with cer- tain approved batteries in order to be considered "safe" in hazardous environments. Hazardous environments include areas that are potentially explosive or flamma- ble. Therefore it is highly desirable to warn the radio user if an "unsafe" battery is being utilized. The user would be warned or alerted of this condition by any of the following methods: 1. An audible tone emitted from the radio speaker.

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MOTOROLA INC. Technical Developments Volume 19 June 1993

INTRINSICALLY SAFE BATTERY/RADIO INTERLOCK SAFETY FEATURE

by Michael Macaluso and Gino W Toui

  Many safety organizations require that portable radios or communication devices be operated only with cer- tain approved batteries in order to be considered "safe" in hazardous environments. Hazardous environments include areas that are potentially explosive or flamma- ble. Therefore it is highly desirable to warn the radio user if an "unsafe" battery is being utilized. The user would be warned or alerted of this condition by any of the following methods:

1. An audible tone emitted from the radio speaker.

2. A warning message on the radio display.

3.The radio could also be completely disabled, thus prohibiting operation while in this condition.

  This warning would be accomplished by placing a contact on the safe battery which is connected to the battery ground. The safe radio would have a contact that interfaces with the battery contact, and is routed to the radio microprocessor. Any of the above warnings would be initiated when the microprocessor senses a logic high on its input.

  This feature could be incorporated into all radios, and only be activated through software for radios ordered with the "safe" option.

Safe Battery

Radio or Electronic Device

+ SUPPlY ) ,5 VDC. Pull up

output
1.P. -

1 line I I

Note: output of p.p. in form of data to other radio circuitry on data bus or a control signal to other circuitry.

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