Conduit Electrical Connector Wiring (Option Ge Or Gm); Grounding; Installing The Lcd Display - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0100-4801, Rev EA
August 2010
Conduit Electrical
Connector Wiring
(Option GE or GM)

Grounding

INSTALLING THE
LCD DISPLAY
For 3051S transmitters with conduit electrical connectors GE or GM, refer to
the cordset manufacturer's installation instructions for wiring details. For FM
Intrinsically Safe, non-incendive or FM FISCO Intrinsically Safe hazardous
locations, install in accordance with Rosemount drawing 03151-1009 to
maintain outdoor rating (NEMA 4X and IP66.) See Appendix B, page B-20.
Reassembly of Conduit Receptacles
If the conduit receptacle is removed or replaced, follow the instructions below
to re-wire the GE or GM conduit receptacle to the terminal block:
1. Connect the green/yellow lead wire to the internal ground screw.
2. Connect the brown lead wire to the terminal marked (+).
3. Connect the blue lead wire to the terminal marked (pwr/comm - ).
Transmitter Case
Always ground the transmitter case in accordance with national and local
electrical codes. The most effective transmitter case grounding method is a
direct connection to earth ground with minimal impedance. Methods for
grounding the transmitter case include:
• Internal Ground Connection: The Internal Ground Connection screw
is inside the terminal side of the electronics housing. The screw is
identified by a ground symbol (
transmitters.
• External Ground Assembly: This assembly is included with the
optional transient protection terminal block (Option Code T1), and it is
included with ATEX Flameproof Certification (Option Code E1), ATEX
Intrinsically Safe Certification (Option Code I1), and ATEX Type n
Certification (Option Code N1). The External Ground Assembly can
also be ordered with the transmitter (Option Code D4), or as a spare
part (03151-9060-0001).
NOTE
Grounding the transmitter case using the threaded conduit connection may
not provide a sufficient ground. The transient protection terminal block (Option
Code T1) will not provide transient protection unless the transmitter case is
properly grounded. Use the above guidelines to ground the transmitter case.
Do not run transient protection ground wire with signal wiring; the ground wire
may carry excessive current if a lightning strike occurs.
Transmitters ordered with the LCD display will be shipped with the display
installed. The LCD display requires a PlantWeb housing. Installing the display
on an existing 3051S transmitter requires a small instrument screwdriver and
the display kit.
In addition to housing rotation, the optional LCD display can be rotated in
90-degree increments by squeezing the two tabs, pulling out, rotating and
snapping back into place.
If LCD pins are inadvertently removed from the interface board, carefully
re-insert the pins before snapping the LCD display back into place.
Rosemount 3051S Series
), and is standard on all 3051S
2-21