Emerson Process Management 5300 CABLE/CONDUIT Entries Grounding Cable Selection, Hazardous Areas

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

CABLE/CONDUIT ENTRIES

GROUNDING

CABLE SELECTION

The electronics housing has two entries for ½ - 14 NPT. Optional M20×1.5, minifast and eurofast adapters are also available. The connections are made in accordance with local or plant electrical codes.

Make sure that unused ports are properly sealed to prevent moisture or other contamination from entering the terminal block compartment of the electronics housing.

NOTE!

Use the enclosed metal plug to seal the unused port. The orange plastic plugs mounted at delivery are not sufficient as seal!

The housing should always be grounded in accordance with national and local electrical codes. Failure to do so may impair the protection provided by the equipment. The most effective grounding method is direct connection to earth ground with minimal impedance. There are two grounding screw connections provided. One is inside the Field Terminal side of the housing and the other is located on the housing. The internal ground screw is identified by a ground symbol: .

NOTE!

Grounding the transmitter via threaded conduit connection may not provide sufficient ground.

NOTE!

In the Explosion-proof/Flameproof version, the electronics is grounded via the transmitter housing. After installation and commissioning make sure that no ground currents exist due to high ground potential differences in the installation.

Use shielded twisted pair wiring for the Rosemount 5300 Series to comply with EMC regulations. The cables must be suitable for the supply voltage and approved for use in hazardous areas, where applicable. For instance, in the U.S., explosion-proof conduits must be used in the vicinity of the vessel. For the ATEX flameproof and the IECEx approval versions of the Rosemount 5300 Series, suitable conduits with sealing device or flameproof (EEx d) cable glands must be used depending on local requirements.

Use 18 AWG to 12 AWG to minimize the voltage drop to the transmitter.

HAZARDOUS AREAS

When the Rosemount 5300 transmitter is installed in a hazardous area, local regulations and specifications in applicable certificates must be observed.

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