Power Supply - Emerson Rosemount 3051S Quick Start Manual

Quick Start Guide
Note
For other wiring details, refer to pin-out drawing and the cordset manufacturer's
installation instructions.

Power supply

The DC power supply should provide power with less than two percent ripple. The
total resistance load is the sum of the resistance of the signal leads and the load
resistance of the controller, indicator, and related pieces. Note the resistance of
intrinsic safety barriers, if used, must be included.
Figure 11. Load Limitation
Standard transmitter
Maximum Loop Resistance =
43.5 (Power Supply Voltage – 10.5)
1387
1000
500
0
10.5
The Field Communicator requires a minimum loop resistance of 250Ω for communication.
5.2 Install optional process temperature input
(Pt 100 RTD sensor)
Note
To meet ATEX/IECEx Flameproof certification, only ATEX/IECEx Flameproof cables
(Temperature Input Code C30, C32, C33, or C34) may be used.
1. Mount the Pt 100 RTD sensor in the appropriate location.
Note
Use shielded four-wire cable for the process temperature connection.
2. Connect the RTD cable to the transmitter by inserting the cable wires through
the unused housing conduit 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.
3. Connect the RTD cable shield wire to the ground lug in the housing.
16
Operating
Region
30
20
42.4
Voltage (Vdc)
HART diagnostic transmitter (option code DA2)
differential pressure and temperature transmitter
Maximum Loop Resistance =
43.5 (Power Supply Voltage – 12.0)
1322
1000
500
0
12.0
September 2017
Operating
Region
20 30
42.4
Voltage (Vdc)