Technical Specifications

Dresser
*
Chatterbox-e
Isolation Unit
Model 103 Opto-Isolation Unit
The Dresser Chatterbox-e Isolation Unit provides
the necessary safety isolation between equipment
generating pulses in a hazardous area and non
intrinsically safe equipment located in a safe area.
Opto - isolators provide four isolated volt-free
contacts from low frequency pulses generated
by gas meters or volume correctors installed in a
hazardous area.
The Chatterbox-e Isolation Unit operates from a
self-contained power supply lasting in excess of
10 years and is suitable for installation in remote
and rugged environments without the need for an
external power supply.
The unit consists of four independent circuits that
transform high impedance pulses, or volt-free
contact closures into isolated volt-free contact
closures. One input can be connected to up to four
isolated output circuits by using internal switches.
GE Oil & Gas
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10 Year battery life from standard cells; two 1/2
AA lithium. “ Virtual power for life”
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Four channels as standard
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Channel selections via switches
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Two output glands as standard promotes ease of
installation when more than one system is to be
connected to the Chatterbox-e
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ATEX Certified Intrinsic Safety
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Weatherproof cast aluminum housing rated to
IP66 (equivalent to NEMA 4x) offers flexibility of
installation
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Compliance to UK Institute of Gas Engineers
Editions 1 & 2 “Electrical Connections to Gas
Meters” and USA Article 500 of the National
Electrical Code, ANSI/NFPA-70 (NEC)”
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Opto-isolation increases reliability and reduces
power consumption
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Simple mechanical and electrical installation
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Single or multiple outputs from single input
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No corrector or meter setting required. As soon
as the Chatterbox-e receives a pulse, a 220ms
isolated output pulse is generated