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Reference Manual
00809-0100-4803, Rev GA
Installation
September 2017
Installation
2. Connect the RTD cable to the Rosemount 3051SMV by inserting the cable wires through the unused
housing conduit connection and connect to the four screws on the transmitter terminal block. An
appropriate cable gland should be used to seal the conduit opening around the cable. See
3. Connect the RTD cable shield wire to the ground lug in the housing.
Figure 3-10. RTD Wiring Connection
Three-wire RTD
A four-wire Pt 100 RTD is required to maintain published performance specifications. A three-wire Pt 100
RTD may be used with degraded performance. If connecting to a three-wire RTD, use a four-wire cable to
connect the Rosemount 3051SMV terminal block to the RTD connection head. Within the RTD
connection head, connect two of the same colored wires from the Rosemount 3051SMV to the single
colored wire of the RTD sensor.
Surges/transients
The transmitter will withstand electrical transients of the energy level usually encountered in static
discharges or induced switching transients. However, high-energy transients, such as those induced in
wiring from nearby lightning strikes, can damage the transmitter.
Optional transient protection terminal block
The transient protection terminal block can be ordered as an installed option (code T1 in the transmitter
model number) or as a spare part to retrofit existing Rosemount 3051SMV in the field. For a complete
listing of spare part numbers for transient protection terminal blocks, refer to
. A lightning bolt symbol on a terminal block identifies it as having transient protection.
A. Ground lug
B. RTD connection head
C. Pt 100 RTD sensor
D. RTD cable assembly wires
A
B
C
D
Red
Red
White
White
Summary of Contents for 3051S Series
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