Emerson 3051S - Manual (Page 7)

Quick Installation Guide
00825-0100-4801, Rev HA
February 2008
Rosemount 3051S
7
S TEP 4: C ONNECT W IRING AND P OWER U P
Use the following steps to wire the transmitter:
1. Remove the housing cover labeled “Field Terminals.”
2. Connect the positive lead to the “+” terminal, and the negative lead
to the “–” terminal.
NOTE
Do not connect the power across the test terminals. Power could
damage the test diode in the test connection. Twisted pairs yield best
results. For single compartment housing (Junction Box housing),
shielded signal wiring should be used in high EMI/RFI environments.
Use 24 AWG to 14 AWG wire and do not exceed 5,000 feet
(1500 meters).
3. Plug and seal the unused conduit connection.
4. If applicable, install wiring with a drip loop. Arrange the drip loop
so the bottom is lower than the conduit connections and the
transmitter housing.
5. Replace the housing cover.
The figures below show the wiring connections necessary to power a
3051S and enable communications with a hand-held HART
communicator.
Figure 3. Transmitter Wiring
PlantWeb Housing Wiring Junction Box Housing Wiring
NOTE
Installation of the transient protection terminal block does not
provide transient protection unless the 3051S case is properly
grounded.
RL ≥ 250 Ω
Power
Supply Power
Supply
RL ≥ 250 Ω
4801_QIG_RevHA.fm Page 7 Tuesday, February 26, 2008 12:17 PM