Rosemount 848T Uživatelský manuál stáhnout pdf (Strana 5)

Quick Installation Guide

00825-0100-4697, Rev DB

September 2011

Rosemount 848T

STEP 2 CONTINUED...

Sensor Wiring and Power Supply

• Compatible with eight independently configurable channels including combinations of 2-

and 3-wire RTDs, thermocouples, mV, ohm and mA sensors.

• All sensor and power terminals are rated to 42.4 Vdc.

•F

OUNDATION fieldbus network powered with a terminal voltage of 9.0 to 32.0 Vdc and 22

mA maximum current draw.

• For best network performance twisted, shielded pair cabling should be used. Proper

gage wire should be selected to maintain the 9.0 Vdc minimum.

Figure 7. Sensor Wiring Diagram

The wiring of 3-wire RTDs for this unit is different than some earlier 848T models. Pay

careful attention to the wiring diagram on the label, especially if this unit is replacing an older

unit.

Wiring Analog Inputs

Figure 8. 848T Analog Input Wiring Diagram9

* Emerson Process Management provides 4-wire sensors for all single-element RTDs. Use

these RTDs in 3-wire configurations by clipping the fourth lead or leaving it disconnected and

insulated with electrical tape.

** The transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a

compensation loop.

123

2-wire

RTD and

Ohms

3-wire

RTD and

Ohms*

Thermocouples /

Ohms and

Millivolts

123 123

2-Wire RTD

with

Compensation

Loop**

123

Analog Input Connectors

Power Supply

Analog Transmitters

1 2 3 4 5 6 7 8 9 10 ... 19 20

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Rosemount 848T Uživatelský manuál Strana 5

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