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May 2019
5
Connect the wiring and power up
CAUTION
Do not tamper with or remove the electronics board in the Rosemount
3051P. This will cause permanent damage to the transmitter.
Shielded twisted pair cable should be used for best results. Use 24 AWG or
larger wire that does not exceed 5000 ft. (1500 m) in length. 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.
Figure 5-1: Wiring the Transmitter (4–20 mA HART)
A. Vdc supply
B. R
CAUTION
•
Installation of the transient protection terminal block does not provide
transient protection unless the transmitter case is properly grounded.
•
Do not run signal wiring in conduit or open trays with power wiring, or
near heavy electrical equipment.
•
Do not connect the powered signal wiring to the test terminals. Power
could damage the test diode in the terminal block.
Use the following steps to wire the transmitter:
Procedure
1. Remove the housing cover on the FIELD TERMINALS side.
2. Connect the leads as shown in
3. Tighten the terminal screws to ensure full contact with the terminal
block screw and washer. When using a direct wiring method, wrap
wire clockwise to ensure it is in place when tightening the terminal
block screw.
Quick Start Guide
≥ 250 (necessary for HART
L
®
communication only)
Figure
5-1.
Quick Start Guide
™
11
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