Emerson Rosemount 644h User manual

Quick Start Guide
00825-0100-4829, Rev DA
September 2016
Rosemount™644H Temperature
Transmitters
with FOUNDATION™Fieldbus
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September 2016
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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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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
D
A
E
B
F
C
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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
E
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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
A
B
C
2-wire
RTD and ⍀3-wire
RTD(1)
and ⍀
4-wire
RTD(2)
and ⍀
T/C
and mV
1234 1234 1234 1234
A
BC
D
E
F
F
G
H
I
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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
A
B
C
DD
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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
D
B
AC
A
B
DD
C
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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.
A
B
DD
C
COMMISSIONING TAG
Device ID:
0011513051010001440-121698091725
PD Tag:
TT- 101
Revision: 7.2
Revision: 7.2
Support files available at
www.rosemount.com
Device Serial Number:
XXXXXXXXXX
Device ID:
0011513051010001440-1216980917
25
PD Tag:
TT- 101
Tear Here
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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
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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:
mV
Ohms
°C
°F
°R
K
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”
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