Emerson Rosemount 644h Manuale utente

Quick Start Guide

00825-0100-4829, Rev DA

September 2016

Rosemount™644H Temperature

Transmitters

with FOUNDATION™Fieldbus

00825-0100-4829_RevDA.fm Page 1 Tuesday, September 13, 2016 2:34 PM

September 2016

Quick Start Guide

NOTICE

This guide provides basic guidelines for the Rosemount 644. It does not provide instructions for detailed

configuration, diagnostics, maintenance, service, troubleshooting, or installation. Refer to the Rosemount

644 Reference Manual for more instruction. The manual and this guide are also available electronically on

EmersonProcess.com/Rosemount.

Explosions could result in death or serious injury.

Installation of this transmitter in an explosive environment must be in accordance with the appropriate local,

national, and international standards, codes, and practices. Review the approvals section of the Rosemount

644 Reference Manual for any restrictions associated with a safe installation.

In an Explosion-proof/Flameproof installation, do not remove the transmitter covers when power is applied to

the unit.

Process leaks may cause harm or result in death.

Install and tighten thermowells or sensors before applying pressure.

Do not remove the thermowell while in operation.

Electrical shock can result in death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical

shock.

Contents

Mount the transmitter . . . . . . . . . . . . . . . . . . . . 3

Wire and apply power . . . . . . . . . . . . . . . . . . . . . 4

Ground the transmitter . . . . . . . . . . . . . . . . . . . 6

Verify tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Verify transmitter configuration . . . . . . . . . . . . 8

Product Certifications . . . . . . . . . . . . . . . . . . . .11

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Quick Start Guide

September 2016

1.0 Mount the transmitter

Mount the transmitter at a high point in the conduit run to prevent moisture from

draining into the transmitter housing.

1.1 Typical connection head installation

Head mount transmitter with DIN plate style sensor

1. Attach the thermowell to the pipe or process container wall. Install and tighten

the thermowell before applying process pressure.

2. Assemble the transmitter to the sensor. Push the transmitter mounting screws

through the sensor mounting plate and insert the snap rings (optional) into

the transmitter mounting screw groove.

3. Wire the sensor to the transmitter (see Verify transmitter configuration ).

4. Insert the transmitter-sensor assembly into the connection head. Thread the

transmitter mounting screw into the connection head mounting holes.

Assemble the extension to the connection head. Insert the assembly into the

thermowell.

5. Slip the shielded cable though the cable gland.

6. Attach a cable gland into the shielded cable.

7. Insert the shielded cable leads into the connection head through the cable

entry. Connect and tighten the cable gland.

8. Connect the shielded power cable leads to the transmitter power terminals.

Avoid contact with sensor leads and sensor connections.

9. Install and tighten the connection head cover. Enclosure covers must be fully

engaged to meet explosion-proof requirements.

1.2 Typical universal head installation

Head mount transmitter with threaded sensor

1. Attach the thermowell to the pipe or process container wall. Install and tighten

thermowells before applying process pressure.

2. Attach necessary extension nipples and adapters to the thermowell. Seal the

nipple and adapter threads with silicone tape.

3. Screw the sensor into the thermowell. Install drain seals if required for severe

environments or to satisfy code requirements.

A.Rosemount 644 Transmitter

B. Connection head

C. Thermowell

D. Transmitter mounting screws

E. Integral mount sensor with flying leads

F. Ex tension

00825-0100-4829_RevDA.fm Page 3 Tuesday, September 13, 2016 2:34 PM

September 2016

Quick Start Guide

4. Pull the sensor wiring leads through the universal head and transmitter.

Mount the transmitter in the universal head by threading the transmitter

mounting screws into the universal head mounting holes.

5. Mount the transmitter-sensor assembly into the thermowell. Seal adapter

threads with silicone tape.

6. Install conduit for field wiring to the conduit entry of the universal head. Seal

conduit threads with PTFE tape.

7. Pull the field wiring leads through the conduit into the universal head. Attach

the sensor and power leads to the transmitter. Avoid contact with other

terminals.

8. Install and tighten the universal head cover. Enclosure covers must be fully

engaged to meet explosion-proof requirements.

2.0 Wire and apply power

Wiring diagrams are located inside the terminal block cover.

An external power supply is required to power a Fieldbus segment.

The power required across the transmitter power terminals is 9 to 32 VDC (the

power terminals are rated to 32 VDC). To prevent damaging the transmitter, do

not allow terminal voltage to drop below 9 VDC when changing the configuration

parameters.

2.1 Power filter

A Fieldbus segment requires a power conditioner to isolate the power supply filter

and decouple the segment from other segments attached to the same power

supply.

2.2 Power the transmitter

1. Remove the terminal block cover (if applicable).

2. Connect the power lead to the power terminals (The Rosemount 644 with

FOUNDATION Fieldbus is polarity insensitive.)

3. Tighten the terminal screws. When tightening the sensor and power wires, the

max torque is 6 in-lb. (0.7 N-m).

4. Reattach and tighten the cover (if applicable).

A. Threaded thermowell

B. Standard extension

C. Threaded style sensor

D. Universal head (transmitter inside)

E. Conduit entry

ABCD

00825-0100-4829_RevDA.fm Page 4 Tuesday, September 13, 2016 2:34 PM

Quick Start Guide

September 2016

5. Apply power (9–32 VDC).

A. Sensor terminals

B. Communication terminals

C. Power terminals

Figure 1. Sensor Connections

1. Emerson™provides 4-wire sensors for all single element RTDs. Use these RTDs in 3-wire configurations

by leaving the unneeded leads disconnected and insulated with electrical tape.

2. The transmitters must be configured for at least a 3-wire RTD in order to recognize an RTD with a

compensation loop.

Figure 2. Typical Configuration for Fieldbus Networking

A. 6234 ft. (1900 m) max, depending upon

cable characteristics

B. Integrated power conditioner and filter

C. Terminators

D. Power supply

E. Trunk

F. Spur

G. FOUNDATION Fieldbus configuration tool

H. Devices 1 through 16

I. Power/signal wiring

1 2 3 4

2-wire

RTD and ⍀3-wire

RTD(1)

and ⍀

4-wire

RTD(2)

and ⍀

T/C

and mV

1234 1234 1234 1234

00825-0100-4829_RevDA.fm Page 5 Tuesday, September 13, 2016 2:34 PM

September 2016

Quick Start Guide

Note

The power supply, filter, first terminator, and configuration tool are typically located in the

control room.

Note

Each segment in a Fieldbus trunk must be terminated at both ends.

3.0 Ground the transmitter

3.1 Ungrounded thermocouple, mV, and RTD/Ohm inputs

Each process installation has different requirements for grounding. Use the

grounding options recommended by the facility for the specific sensor type, or

begin with grounding Option 1 (the most common).

Option 1

1. Connect sensor wiring shield to the transmitter housing.

2. Ensure the sensor shield is electrically isolated from surrounding fixtures that

may be grounded.

3. Ground signal wiring shield at the power supply end.

Option 2

1. Connect signal wiring shield to the sensor wiring shield.

2. Ensure the two shields are tied together and electrically isolated from the

transmitter housing.

3. Ground shield at the power supply end only.

A. Transmitter

B. Sensor wires

C. Fieldbus loop

D. Shield ground point

00825-0100-4829_RevDA.fm Page 6 Tuesday, September 13, 2016 2:34 PM

Quick Start Guide

September 2016

4. Ensure the sensor shield is electrically isolated from the surrounding

grounded fixtures.

Note

Connect shields together, electrically isolated from the transmitter.

Option 3

1. Ground sensor wiring shield at the sensor, if possible.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from

the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

3.2 Grounded thermocouple inputs

Option 4

1. Ground sensor wiring shield at the sensor.

2. Ensure the sensor wiring and signal wiring shields are electrically isolated from

the transmitter housing.

3. Do not connect the signal wiring shield to the sensor wiring shield.

4. Ground signal wiring shield at the power supply end.

A. Transmitter

B. Sensor wires

C. Fieldbus loop

D. Shield ground point

A. Transmitter

B. Sensor wires

C. Fieldbus loop

D. Shield ground point

00825-0100-4829_RevDA.fm Page 7 Tuesday, September 13, 2016 2:34 PM

September 2016

Quick Start Guide

4.0 Verify tagging

5.0 Verify transmitter configuration

Each FOUNDATION Fieldbus host or configuration tool has a different way of

displaying and performing configurations. Some use Device Descriptions (DD) or

DD methods for configuration and to display data consistently across platforms.

There is no requirement that a host or configuration tool support these features.

The following is the minimum configuration requirement for a temperature

measurement. This guide is designed for systems not using DD methods. For a

complete list of parameters and configuration information refer to the

Rosemount 644 Head and Rail Mount Temperature Transmitter Reference

Manual.

A. Transmitter

B. Sensor wires

C. Fieldbus loop

D. Shield ground point

4.1 Commissioning (paper) tag

To identify which device is at a particular

location use the removable tag provided

with the transmitter. Ensure the physical

device tag (PD Tag field) is properly

entered in both places on the removable

commissioning tag and tear off the

bottom portion for each transmitter.

Note

The device description loaded in the host

system must be at the same revision as this

device. The device description can be

downloaded from

EmersonProcess.com/Rosemount.

COMMISSIONING TAG

Device ID:

0011513051010001440-121698091725

PD Tag:

TT- 101

Revision: 7.2

Support files available at

www.rosemount.com

Device Serial Number:

XXXXXXXXXX

Device ID:

0011513051010001440-1216980917

PD Tag:

TT- 101

Tear Here

00825-0100-4829_RevDA.fm Page 8 Tuesday, September 13, 2016 2:34 PM

Quick Start Guide

September 2016

5.1 Transducer function block

This block contains temperature measurement data for the sensor and the

terminal temperature. It also includes information about sensor types,

engineering units, damping and diagnostics. At a minimum, verify the

parameters in Table 1.

5.2 Analog Input (AI) function block

The AI block processes field device measurements and makes the outputs

available to other function blocks. The output value of the AI block is in

engineering units and contains a status indicating the quality of the

measurements. Use the channel number to define the variable that the AI block

processes. At a minimum, verify the parameters of each AI block in Table 2.

Table 1. Transducer Block Parameters

Parameter Comments

Typical Configuration

SENSOR_TYPE example: “Pt 100_A_385 (IEC 751)”

SENSOR_CONNECTIONS example: “2-wire”, “3-wire”, “4-wire”

Sensor Matching Configuration

SENSOR_TYPE “User Defined, Calvandu”

SENSOR_CONNECTIONS example: “2-wire”, “3-wire”, “4-wire”

SENSOR_CAL_METHOD set to “User Trim Standard”

SPECIAL_SENSOR_A enter sensor specific coefficients

SPECIAL_SENSOR_B enter sensor specific coefficients

SPECIAL_SENSOR_C enter sensor specific coefficients

SPECIAL_SENSOR_R0 enter sensor specific coefficients

00825-0100-4829_RevDA.fm Page 9 Tuesday, September 13, 2016 2:34 PM

September 2016

Quick Start Guide

Note

To make changes to the AI block, the BLOCK_MODE (TARGET) must be set to OOS (out of

service). Once the changes are made, return the BLOCK_MODE TARGET to AUTO.

Table 2. AI Block Parameters(1)

1. Configure one AI Block for each desired measurement.

Parameter Comments

CHANNEL

Choices:

1. Sensor 1

2. Housing Temperature

L_TYPE For most measurements, set to “DIRECT”

XD_SCALE

Set desired measurement range and units.

Units must be one of the following:

Ohms

°C

°F

°R

OUT_SCALE For “DIRECT” L_TYPE, set OUT_SCALE to

match XD_SCALE

HI_HI_LIM

HI_LIM

LO_LIM

LO_LO_LIM

Process alarms.

Must be within the range defined by

“OUT_SCALE”

00825-0100-4829_RevDA.fm Page 10 Tuesday, September 13, 2016 2:34 PM

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