Emerson Rosemount - 2.5.3 Sensor connections

23
Reference Manual
00809-0100-4021, Rev GC
Section 2: Installation
April 2014
Installation
2.5.2 FOUNDATION fieldbus
Figure 2-12. Transmitter Terminal Block
A. Sensor terminals (1 – 5)
B. Ground
C. Power terminals
2.5.3 Sensor connections
The correct sensor wiring connections to the transmitter sensor terminals are shown in Figure
2-9 on page 21 (HART) and Figure 2-14 on page 25 (F
OUNDATION fieldbus). To ensure an
adequate sensor connection, anchor the sensor lead wires beneath the flat washer on the
terminal screw. Do not remove the transmitter cover in explosive atmospheres if the circuit is
live. Both transmitter covers must be fully engaged to meet explosion-proof requirements. Use
extreme caution when making contact with the leads and terminals.
Figure 2-13. Sensor Wiring Diagram for FOUNDATION fieldbus
3144P single-sensor connections diagram
3144P dual-sensor connections diagram
(1) Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a compensation loop.
(2) Emerson Process Management provides 4-wire sensors for all single-element RTDs. Use these RTDs in 2-wire or 3-wire configurations by leaving the unneeded leads
disconnected and insulated with electrical tape.
A
B
C
C
B
A
Wiring connections
Wiring connections
(with “T1” integral transient protection option)
4-wire RTD
and Ohms
T/Cs and
Millivolts
RTD with
Compensation Loop
(1)
2-wire RTD
and Ohms
3-wire RTD
and Ohms
(2)
T/Hot
Backup/Dual Sensor
with 2 RTDs
T/Hot Backup/Dual
Sensor with 2
Thermocouples
T/Hot
Backup/Dual
Sensor with RTDs/
Thermocouples
(2)
T/Hot Backup/Dual
Sensor with RTDs/
Thermocouples
(2)
T/Hot Backup/Dual
Sensor with 2 RTDs with
Compensation Loop
(2)