Remote Display Wiring And Power Up - Emerson Rosemount 3051S Series Reference Manual

Installation
October 2018
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.
3.6.4

Remote display wiring and power up

The remote mount display and interface system consists of a local transmitter and a remote mount LCD
display assembly. The local Rosemount 3051S Transmitter assembly includes a Junction Box housing with
a three position terminal block integrally mounted to a SuperModule. The remote mount LCD display
assembly consists of a dual compartment Plantweb housing with a seven position terminal block. See
Figure 3-15 on page 65
specific to the remote mount display system:
Each terminal block is unique for the remote display system.

A 316 SST housing adapter is permanently secured to the remote mount LCD display Plantweb housing

providing an external ground and a means for field mounting with the provided mounting bracket.
A cable is required for wiring between the transmitter and remote mount LCD display. The cable length

is limited to 100 ft.
50 ft. (option M8) or 100 ft. (option M9) cable is provided for wiring between the transmitter and

remote mount LCD display. Option M7 does not include cable. Other comparable cable may be used as
long as it has independent dual twisted shielded pair wires with an outer shield. The power wires must
be 22 AWG minimum and the CAN communication wires must be 24 AWG minimum.
Note
Cable length may be up to 100 ft. (31 m), depending on cable capacitance. The capacitance as wired
must be less than 5000 picofarads total. This allows up to 50 picofarads per 1 ft. (0.3 m) for a
100 ft. (31 m) cable.
Intrinsic Safety Consideration: The transmitter assembly with remote display has been approved with
Madison AWM Style 2549 cable. Alternate cable may be used as long as the transmitter with remote
display and cable is configured according to the installation control drawing or certificate. Refer to
appropriate approval certificate or control drawing in
remote cable IS requirements.
Important
Do not apply power to the remote communications terminal. Follow wiring instructions carefully to
prevent damage to system components.
Important
For ambient temperatures above 140 °F (60 °C), cable wiring must be rated at least 9 °F (5 °C) above the
maximum ambient temperature.
64
for complete wiring instructions. The following is a list of necessary information
00809-0100-4801, Rev HA
Appendix A: Specifications and Reference Data
Reference Manual
for
Installation