Emerson 3000 instruction manual Installation, World Class, Instruction Bulletin

Models: 3000

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INSTALLATION

World Class 3000

Instruction Bulletin

Appendix J Rev. 1.2 May 2005

INSTALLATION

J-4 HART COMMUNICATOR SIGNAL LINE CONNECTIONS

The HART Communicator can connect to the IFT analog output signal line at any wiring ter- mination point in the 4-20 mA current loop.

There are two methods of connecting the HART Communicator to the signal line. For applica- tions in which the signal line has a load resis- tance of 250 ohms or more, refer to method 1.

For applications in which the signal line load re- sistance is less than 250 ohms, refer to method 2.

a.Method 1, For Load Resistance > 250 Ohms

Refer to Figure J-2 and the following steps to connect the HART Communicator to a signal line with 250 ohms or more of load resistance.

 

 

 

 

 

CURRENT/VOLTAGE SELECTION SWITCH

J1

 

 

C

SW3

TO "CURRENT" POSITION

 

 

 

D

 

 

 

 

 

B

 

 

 

 

 

 

A

 

 

 

 

JM6

 

ON

OFF

 

 

 

 

 

 

 

 

MICROPROCESSOR

J3

J2

JM8

 

SW2

 

BOARD

 

3D39513G, REV 13

 

 

 

 

 

MICROPROCESSOR

 

 

 

 

 

BOARD 10

 

 

 

INTERCONNECT BOARD

 

 

 

 

J1

 

 

 

 

 

J2

 

 

 

 

 

 

J3

 

 

ANALOG OUTPUT

 

 

 

 

 

 

 

 

 

J4

 

 

RL > 250

 

 

 

J5

 

 

 

 

 

 

J6

 

O2

4-20 MA SIGNAL LINE

 

 

 

J7

 

 

 

 

 

 

J8

 

 

 

 

 

 

J9

 

 

 

 

 

 

 

JM1

 

ANALOG OUTPUT DEVICE

 

 

 

 

 

 

INTELLIGENT FIELD

 

LOOP

 

 

TRANSMITTER IFT 3000

CONNECTORS

 

 

 

 

 

 

 

HART

COMMUNICATOR

MODEL 275/375

LEAD SET

HART COMMUNICATOR

REAR PANEL

37840018

Figure J-2. Signal Line Connections, > 250 Ohms Load Resistance

Rosemount Analytical Inc. A Division of Emerson Process Management

Appendices J-3

Page 169
Image 169
Emerson 3000 Installation, World Class, Instruction Bulletin, J-4HART COMMUNICATOR SIGNAL LINE CONNECTIONS