Emerson Process Management ROSEMOUNT 5300 - Manual (Page 61)

Reference Manual
00809-0100-4530, Rev BA
July 2009
4-3
Rosemount 5300 Series
CABLE/CONDUIT
ENTRIES 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!
GROUNDING 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.
CABLE SELECTION 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.