®

MADE IN THE U.S.A

ICRI Tunnel Radio/Repeater Solutions

Mine Safety OperationJune 17th 2010

Tunnel Radio Relay/Repeater:

Tunnel radio relay/repeater: Utilize MSHA approved radio inside tunnel 500’ cable/reel (18 lbs); “gang” up to 5000’ No AC/DC on cables Relay/repeater (4.1 lbs) water-proof, powered by 6 internal “AA”

batteries

GROUND LEVELTUNNEL

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Tunnel Radio/Relay Repeater

Utilize MSHA approved radio inside tunnel 500’ cable/reel (18 lbs); “gang” up to 5000’ No AC/DC on cables Relay/repeater (4.1 lbs) water-proof, powered by 6 internal

“AA” batteries

← TUNNEL

→GROUND LEVEL

Repeater/Relay Functional Diagram

2-way radio connected to

repeater/relay transmitting

frequency “B” or trunking assigned

channel to radios at ground level

Entry team 2-way radios

frequency “A” transmitting to one

another and to radio on reel

2-way radio on reel receiving

frequency “A

2-way radios receiving

frequency “B” or trunking assigned

channel

Automatic gain control

Audio buffer/delay

VOX with tail timer

Muting

ORANGE: RF*GREEN: AUDIO LEVEL and BUFFER*BLUE: ‘KEYING’ LOGIC/CONTROL*

VIOLET: SQUELCH TAIL BLOCKING** adjustable

Certification to Class 1, Division 1, Groups C and D Reduce number of internal “AA” batteries from six to five

(9V to 7.5V Install current limiting resistor between batteries and

regulator (limit to 70mA) Install 250 mA fuse between batteries and regulator

Intrinsically Safe Certification Anticipated Modifications:

GROUND LEVELTUNNEL

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For Additional Information…

G. Seth LeymanCommunications-Applied Technology

11250-14 Roger Bacon Drive, Reston, VA, 20190 Voice: 703-481-0068; Fax: 703-471-4428

Tech Support x23 (24/7/365)

e-mail: leymans@c-at.com Website: www.radiointeroperability.com

CAGE Code: 0EEY2, TIN: 54-1215868DOL Small Business SIC 3669