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Reference Manual
00809-0100-4882, Rev AB
May 2019
ELECTRICAL
INSTALLATION
General
All wiring must conform to local and national codes.
For intrinsically safe applications, refer to the installation drawings on Emerson.com for the
model 5081FG.
Disconnect and lock out power before connecting the unit to the power supply.
Install all protective equipment covers and safety ground leads after installation. Failure to
install covers and ground leads could result in serious injury or death.
To meet the Safety Requirements of IEC 61010 (EC requirement), and ensure safe
operation of this equipment, connection to the main electrical power supply must be made
through a circuit breaker (min 10 A) which will disconnect all current-carrying conductors
during a fault situation. This circuit breaker should also include a mechanically operated
isolating switch. If not, then another external means of disconnecting the supply from the
equipment should be located close by. Circuit breakers or switches must comply with a
recognized standard such as IEC 947.
The power supply and signal wiring should be shielded. Also, make sure the
signal wiring is grounded at the Rosemount 5081 transmitter end only. Do not
ground the signal loop at more than one point. Twisted pairs are
recommended. Ground the transmitter housing to an earth ground to prevent
unwanted electromagnetic interference (EMI) or radio frequency interference
(RFI).
NOTE
For optimum EMI/RFI immunity, shield the 4-20 mA current loop cable and
enclose in an earth grounded metal conduit.
NOTE
Never run signal or sensor wiring in the same conduit, or open tray, with
power cables. Keep signal or sensor wiring at least 12 in. (0,3 m) away from
other electrical equipment and 6.5 ft (2 m) from heavy electrical equipment.
Rosemount 5081FG
2-11
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