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Masoneilan SVI II AP Installation and Maintenance ... - GE Energy

Masoneilan SVI II AP Installation and Maintenance ... - GE Energy

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HART Communications<br />

with Intrinsic Safety<br />

8<br />

Overview<br />

When an <strong>SVI</strong> <strong>II</strong> <strong>AP</strong> is installed in a hazardous area in accordance with the applicable codes<br />

<strong>and</strong> st<strong>and</strong>ards for Intrinsic Safety there are wiring considerations for successful operation in<br />

addition to the requirements for safety. The choice <strong>and</strong> application of intrinsic safety barriers<br />

requires special training. For additional information, consult MTL Instruments PLC<br />

Measurement Technology Limited: www.mtl-inst.com or R.Stahl, Inc. www.rstahl.com.<br />

All installations must comply with plant st<strong>and</strong>ards <strong>and</strong> local <strong>and</strong> international electrical<br />

codes.<br />

There are three basic barrier types:<br />

Single channel zener diode barriers<br />

Dual channel zener diode barriers<br />

Active galvanic isolators<br />

To determine if the installation will perform successfully with HART communications you<br />

must consider HART filter requirements <strong>and</strong> HART barrier compliance.<br />

123

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