Reference Manual
Product Discontinued
00809-0100-4799, Rev BA
September 2002
Model 3244MV™ MultiVariable Temperature
Transmitter with Profibus-PA
(Device Revision 2)
Profibus-PA
www.rosemount.com
Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
Model 3244MV MultiVariable
Temperature Transmitter with
Profibus-PA
NOTICE
Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure to thoroughly understand the contents before
installing, using, or maintaining this product.
The United States has two toll-free assistance numbers and one International number.
Customer Central
1-800-999-9307
(7:00 a.m. to 7:00 P.M. CST)
International
1-(952) 906-8888
National Response Center
1-800-654-7768
(24 hours a day)
Equipment service needs
The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require
nuclear-qualified hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact a local Rosemount Sales
Representative.
www.rosemount.com
Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
Table of Contents
SECTION 1
Introduction
SECTION 2
Installation
Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Profibus Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Power Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Access Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Temperature Environments. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Moist or Corrosive Environments . . . . . . . . . . . . . . . . . . . . . . . 2-4
Mounting and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Typical North American Installation . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Typical European Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Connect the Wiring and Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Shielded Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Transmitter Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Surges/Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Sensor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
RTD or Ohm Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Thermocouple or Millivolt Inputs . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Set the Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Simulate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
SECTION 3
Commissioning
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Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Profibus Device Description and GSD File. . . . . . . . . . . . . . . . . . . 3-2
Changing the Mode of a Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Physical Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Model 3244MV
Reference Manual
00809-0100-4799, Rev BA
September 2002
Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
AI blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
2-point trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Parameter blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
AI Block (Slots 6, 7, 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Physical Block (Slot 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Transducer 1 (Sensor 1) and Transducer 2 (Sensor 2) Block (Slots 3 and 4)
3-7
Transducer 3 (Differential) Block (Slot 5) . . . . . . . . . . . . . . . . . . . 3-10
PV Status Byte Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
SECTION 4
Maintenance
APPENDIX A
Specifications and
Reference Data
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Sensor Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Removing the Profibus-PA Electronics Module Assembly . . 4-3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Replacing the Profibus-PA Electronics Module Assembly . . . . 4-4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Functional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Profibus-PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Spare Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Hardware Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Custom Transmitter Configuration (Option Code C1) . . . . . . .A-10
Trim to Specific Rosemount RTD Calibration Schedule
(Transmitter-to-Sensor Matching) (option code C2) . . . . . . . . A-10
Five Point Calibration (option code C4). . . . . . . . . . . . . . . . . . A-10
Trim to Special non-Standard Sensor (option code C7) . . . . . A-10
Mounting Brackets (option codes B4 and B5) . . . . . . . . . . . . . A-11
External Ground Lug Assembly (option code G1). . . . . . . . . . A-11
APPENDIX B
Approvals
TOC-2
Hazardous Locations Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Installation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Reference Manual
00809-0100-4799, Rev BA
September 2002
Section 1 Introduction
Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
Model 3244MV
USING THIS MANUAL This manual is intended to assist in installing, operating, and maintaining
Rosemount
Profibus-PA.
Section 2: Installation
• Considerations
• Mounting and Installation
• Wiring
• Power
• Switches
Section 3: Commissioning
• Profibus-PA Installation
• Configuration
• Parameter Blocks
Section 4: Maintenance
• Diagnostic messaging
• Maintaining the hardware
Appendix A: Specifications and Reference Data
• Specifications
• Dimensional Drawings
• Tagging
• Options
®
Model 3244MV MultiVariable Temperature Transmitters with
www.rosemount.com
Appendix B: Approvals
• Hazardous Locations Certificates
• Installation Drawings
Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
OVERVIEW
Transmitter Enhanced measurement capability allows the Model 3244MV to communicate
multiple variables to a Profibus-PA host or configuration tool. This
temperature transmitter has the ability to accept simultaneous inputs from two
temperature sensing elements. The differential temperature measurement
capability can be used to detect sensor drift in a dual-element sensor. The
Model 3244MV with Profibus-PA combines the effects of transmitter drift,
sensor interchangeability error, temperature effects, and reference accuracy
to better account for actual process conditions and to assure maximum
accuracy.
The Model 3244MV with Profibus-PA provides superior performance in
non-critical applications involving basic process monitoring as well as
simultaneous measurement of separate and independent temperature points
with one transmitter. With this feature instrument costs are reduced by as
much as 50 percent. In addition, the multi-drop capability of Profibus-PA
results in additional savings through reduced wiring costs.
PROFIBUS Technology Profibus-PA is an all digital, serial, two-way communication system that
interconnects field equipment such as sensors, actuators, and controllers.
Profibus-PA is a Local Area Network (LAN) for instruments used in both
process and manufacturing automation. The profibus environment is the base
level group of digital networks in the hierarchy of plant networks.
Profibus-PA communication retains the desirable features of the 4–20 mA
analog system, including a standardized physical interface to the wire,
bus-powered devices on a single pair of wires, and intrinsic safety options. It
also enables additional capabilities, such as the following:
• increased capabilities due to full digital communications
• reduced wiring and wire terminations due to multiple devices on one
pair of wires
• increased selection of suppliers due to interoperability
• reduced loading on control room equipment with the distribution of
some control and input/output functions to field devices
1-2
Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
Section 2 Installation
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Mounting and Installation . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4
Connect the Wiring and Power Up . . . . . . . . . . . . . . . . . . page 2-7
Set the Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-10
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
Failure to follow these installation guidelines could result in death or serious injury:
• Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
• Do not remove the transmitter cover in explosive atmospheres
when the circuit is live.
• Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
• Both transmitter covers must be fully engaged to meet
explosion-proof requirements.
Electrical shock could cause death or serious injury. If the sensor is installed in a
high-voltage environment and a fault condition or installation error occurs, high voltage may
be present on transmitter leads and terminals.
• Use extreme caution when making contact with the leads and terminals.
Process leaks could result in death or serious injury:
• Install and tighten thermowells or sensors before applying pressure, or process
leakage may result.
• Do not remove the thermowell while in operation. Removing while in operation
may cause process fluid leaks.
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Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
CONSIDERATIONS
General Electrical temperature sensors such as RTDs and thermocouples produce
low-level signals proportional to temperature. The Model 3244MV
temperature transmitter converts the analog sensor signal to a digital signal
that is relatively insensitive to lead length and electrical noise. This current
signal is then transmitted over the bus to the configuration device and the
control room.
Electrical Proper electrical installation is necessary to prevent errors due to sensor lead
resistance and electrical noise. Shielded, twisted cable should be used for
best results in electrically noisy environments. Refer to “Sensor Connections”
on page 2-9 for more information.
Power Supply
The transmitter requires between 9 and 32 V dc to operate and provide
complete functionality. The dc power supply should provide power with less
than 2% ripple.
Power Filter
A profibus segment requires a power conditioner to isolate the power supply
filter and decouple the segment from other segments attached to the same
power supply.
Mechanical The Model 3244MV transmitter can be mounted directly to the sensor or apart
from the sensor using an optional mounting bracket. Using the bracket, the
transmitter can be mounted either to a flat surface or to a 2-inch diameter pipe
(see “Mounting Brackets” on page A-7).
Mounting
The transmitter may require supplementary support under high-vibration
conditions, particularly if used with extensive thermowell lagging or long
extension fittings. Pipe-stand mounting, using one of the optional mounting
brackets, is recommended for use in high-vibration applications.
Access Requirements
When choosing an installation location and position, take into account the
need for access to the transmitter.
Electronics Housing
Mount the transmitter so the terminal side and terminal side is accessible.
Be sure to allow adequate clearance for cover removal. When adding a
LCD meter, mount the circuit-side of the transmitter in a visible position.
Tagging
2-2
Commissioning Tag
The Model 3244MV has been supplied with a removable commissioning
tag that contains both the Device ID and a space to record the device tag.
The Device ID is a unique code that identifies a particular device in the
absence of a device tag. The device tag is used as an operational
identification for the device and is usually defined by the Piping and
Instrumentation Diagram (P & ID).
Model 3244MV
When commissioning more than one device on a profibus segment, it can
be difficult to identify which device is at a particular location. The
removable tag provided with the transmitter can aid in this process by
linking the Device ID and a physical location. The installer should note the
physical location in both places on the removable commissioning tag and
tear off the bottom portion. This should be done for each device on the
segment. The bottom portion of the tags can be used for commissioning
the segment in the control system.
Environmental Temperature Environments
The transmitter will operate within specifications for ambient temperatures
between –40 and 185 °F (–40 and 85 °C).In a direct mounting configuration,
heat from the process is transferred from the thermowell to the transmitter
housing. If the expected process temperature is near or beyond the
specification limits, consider the use of additional thermowell lagging, an
extension nipple, or a remote mounting configuration to isolate the transmitter
from these excessive temperatures. Figure 2-1 provides an example of the
relationship between transmitter housing temperature rise and extension
length. Use Figure 2-1 and the accompanying example to determine
adequate thermowell extension length.
Reference Manual
00809-0100-4799, Rev BA
September 2002
Figure 2-1. Transmitter Housing
Temperature Rise
60 (108)
50 (90)
40 (72)
30 (54)
22
20 (36)
ABOVE AMBIENT °C (°F)
HOUSING TEMPERATURE RISE
10 (18)
0
3 4 5 6 7 8 9
3.6
EXTENSION LENGTH, INCHES (E)
Transmitter Housing
Temperature Rise vs.
Extension Length for
a Test Installation
815 °C (1,500 °F)
Oven Temperature
540 °C (1,000 °F)
Oven Temperature
250 °C (482°F)
Oven Temperature
3044-0123A
EXAMPLE:
The rated temperature specification is 85 °C. If the maximum ambient
temperature is 40 °C and the temperature to be measured is 540 °C, the
maximum allowable housing temperature rise is the rated temperature
specification limit minus the existing ambient temperature (85 – 40), or
45 °C.
As shown in Figure 2-1, an extension (E) dimension of 3.6 inches will result
in a housing temperature rise of 22 °C. An “E” dimension of 4 inches would
therefore be the minimum recommended length and would provide a
safety factor of about 25 °C. A longer “E” dimension, such as 6 inches,
would be desirable in order to reduce errors caused by transmitter
temperature effect, although in that case the transmitter would probably
require extra support. If a thermowell with lagging is used, the “E”
dimension may be reduced by the length of the lagging.
2-3
Model 3244MV
Reference Manual
00809-0100-4799, Rev BA
September 2002
Moist or Corrosive Environments
The Model 3244MV has a highly reliable, dual-compartment housing
designed to resist moisture and corrosives. The electronics module assembly
is mounted in a compartment that is isolated from the terminal side conduit
entries. O-ring seals protect the interior of each compartment from the
environment when the covers are installed. In humid environments it is
possible for moisture to accumulate in conduit lines and drain into the
housing.
Proper installation of the transmitter can ensure maximum operation and
service life. It can also have a significant impact on preventing moisture from
accumulating in the housing. Refer to Figures 2-2 and 2-3 before mounting
the transmitter.
Mount the transmitter at a high point in the conduit run so moisture from the
conduits will not drain into the housing. If the transmitter is mounted at a low
point in the conduit run the terminal compartment could fill with water. In some
instances the installation of a poured conduit seal, such as the one pictured in
Figure 2-3, is advisable. Remove the terminal compartment cover periodically
and inspect the transmitter for moisture damage and corrosion.
Figure 2-2. Incorrect
Conduit Installation
Figure 2-3. Process Mounting
with Drain Seal
Thermowell
Conduit
Lines
Sealing
Compound
Sensor Hex
Union Coupling with Extension
Conduit
Lines
Conduit for
Field Wiring
Poured Conduit Seal
(Where Required)
3144-0429A, B
3144-0430B
MOUNTING AND INSTALLATION
2-4
Installation consists of mounting the transmitter and sensor and making
electrical connections.
Use the typical North American process mounting configuration illustrated in
“Typical North American Installation” on page 2-5 or the typical European
process mounting configuration illustrated in “Typical European Installation”
on page 2-6.
Model 3244MV
Reference Manual
00809-0100-4799, Rev BA
September 2002
For transmitter locations remote from the sensor, use conduit or suitable
shielded cable and cable glands between the sensor and transmitter. The
transmitter accepts male conduit fittings with
PG 13.5 (PG 11), or JIS G
1
/2 threads.
1
/2–14 NPT, M 20 1.5 (CM 20),
Typical North American Installation
1. Mount the thermowell to the pipe or process container wall. Be sure to
tighten thermowells and sensors. Perform a leak check before starting
the process.
2. Attach any necessary unions, couplings, and extension fittings. Be sure
to seal the fitting threads with silicone or tape (if required).
3. Screw the sensor into the thermowell or directly into the process
(depending on installation requirements).
4. Verify all sealing requirements for severe environments or to satisfy code
requirements.
5. Attach the transmitter to the thermowell/sensor assembly. Be sure to
seal all threads with silicone or tape (if required).
6. Pull sensor leads through the extensions, unions, or couplings into the
terminal side of the transmitter housing.
7. Install field wiring conduit to the remaining transmitter conduit entry.
8. Pull the field wiring leads into the terminal side of the transmitter housing.
Avoid contact with the leads and terminals.
9. Attach the sensor leads to the transmitter sensor terminals. Attach the
power leads to the transmitter power terminals. Avoid contact with the
leads and terminals.
10. Attach and tighten both transmitter covers. Both transmitter covers must
be fully engaged to meet explosion-proof requirements.
Figure 2-4. Typical North
American Mounting
Configuration.
Union or
Thermowell
NOTE: Dimensions are in inches (millimeters).
Extension
Coupling
Extension
Fitting
Length
Conduit for Field
Wiring (dc power)
3.2
(81)
NOTE
The National Electrical Code requires that a barrier or seal be used in addition
to the primary (sensor) seal to prevent process fluid from entering the
electrical conduit and continuing to the control room. Professional safety
assistance is recommended for installation in potentially hazardous
processes.
3144-0433B
2-5
Model 3244MV
Reference Manual
00809-0100-4799, Rev BA
September 2002
Typical European Installation
Figure 2-5. Typical European
Process Mounting
Configuration.
1. Mount the thermowell to the pipe or the process container wall. Install
and tighten thermowells and sensors. Perform a leak check before
starting the process.
2. Attach a connection head to the thermowell.
3. Insert the sensor into the thermowell and wire it to the connection head.
The wiring diagram is located on the inside of the connection head.
4. Mount the transmitter to a 2-inch (50 mm) pipe or a suitable panel using
one of the optional mounting brackets. The B4 bracket is shown in
Figure 2-5.
5. Attach cable glands to the shielded cable running from the connection
head to the transmitter conduit entry.
6. Run the shielded cable from the opposite conduit entry on the transmitter
back to the control room.
7. Insert the shielded cable leads through the cable entries into the
connection head and the transmitter. Connect and tighten the cable
glands.
8. Connect the shielded cable leads to the connection head terminals
(located inside of the connection head) and the sensor wiring terminals
(located inside of the transmitter housing). Avoid contact with the leads
and the terminals.
2-inch
Cable
Gland
Pipe
B4
Mounting
Bracket
2-6
Shielded Cable from
Sensor to Transmitter
Shielded Cable
from Transmitter
to Control Room
644-0000B05B
Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
CONNECT THE WIRING AND POWER UP
Field Wiring All power to the transmitter is supplied over the signal wiring. Signal wiring
should be shielded, twisted pair for best results. Do not run unshielded signal
wiring in conduit or open trays with power wiring or near heavy electrical
equipment. Do not remove the transmitter cover in explosive atmospheres
when the circuit is live.
If the sensor is installed in a high-voltage environment and a fault condition or
installation error occurs, the sensor leads and transmitter terminals could
carry lethal voltages. Use extreme caution when making contact with the
leads and terminals.
NOTE
Do not apply high voltage (e.g. ac line voltage) to the transmitter terminals.
Abnormally high voltage can damage the unit. (Sensor and transmitter power
terminals are rated to 42.4 V dc.)
Power Connections Use ordinary copper wire of sufficient size to ensure that the voltage across the
transmitter power terminals does not drop below 9 V dc. To power the
transmitter, connect the power leads to the terminals marked “+” and “T” as
shown in Figure 2-7. The power terminals are polarity insensitive, which
means the electrical polarity of the power leads does not matter when
connecting to the power terminals. When wiring to screw terminals, the use of
crimped lugs is recommended. Tighten the terminal screws to ensure
adequate contact. No additional power wiring is needed.
Figure 2-6. Hardware Setup
Figure 2-7. Transmitter Terminal
Block
Power
connection
for coupler
L+
L–
Power Terminals
(polarity insensitive)
Front of Coupler
Power connection
for segment
P+
P–
Connector to
Siemens Card
installed into PC
Sensor Terminals
Ground
Ter min al
200E01C
2-7
Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
Grounding Transmitters are electrically isolated to 500 V ac rms. Ground the signal
wiring at any single point, if desired. When using a grounded thermocouple,
the grounded junction serves as this point.
NOTE
Do not ground the signal wire at both ends.
Shielded Wire
Recommended grounding techniques for shielded wire usually call for a
single grounding point for each shielded wire to avoid grounding the loop. The
following two examples employ the single point grounding technique:
Example 1
1. Connect the signal wiring shield to the sensor wiring shield.
2. Ensure that the two shields are tied together and electrically isolated
from the transmitter housing.
3. Ground the shield at power supply end.
Example 2
1. Connect the sensor wiring shield to the ground terminal (located
inside the terminal compartment of the transmitter housing).
2. Cut the signal wiring shield and isolate from the transmitter housing.
3. Grounded the shield at the power supply end only. Never connect the
shield for the signal wiring to the ground terminal inside the
transmitter housing.
Transmitter Housing
Ground the transmitter housing in accordance with local electrical
requirements. The internal ground terminal is standard. An optional external
ground lug assembly (option code G1) can also be ordered if needed. This
external grounding method is recommended when using the optional transient
protector (option code T1).
Surges/Transients The transmitter will withstand electrical transients usually encountered in
static discharges or induced switching transients. However, high-energy
transients, such as those induced in wiring from nearby lightning strikes, can
damage both the transmitter and the sensor.
A transient protection will be available at a later date for adding to the Model
3244MV with Profibus-PA.
2-8
Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
Sensor Connections The Model 3244MV transmitter is compatible with many RTD and
thermocouple sensor types. Figure 2-8 shows the correct sensor terminal
input connections on the transmitter. To ensure an adequate sensor
connection, anchor the sensor lead wires beneath the flat washer on the
terminal screw.
If the sensor is installed in a high voltage environment and a fault condition or
installation error occurs, the sensor leads and transmitter terminals could
carry lethal voltages. Use extreme caution when making contact with the
leads and terminals.
RTD or Ohm Inputs
Various RTD configurations, including 2-wire, 3-wire, 4-wire, and
compensation loop designs, are used in industrial applications. If the
transmitter is mounted remotely from a 3- or 4-wire RTD, it will operate within
specifications, without recalibration, for lead wire resistances of up to 10 ohms
per lead (equivalent to 1,000 feet of 20 AWG wire). In this case, the leads
between the RTD and transmitter should be shielded. If using only two leads
(or a compensation loop lead wire configuration), both RTD leads are in
series with the sensor element, so significant errors can occur if the lead
lengths exceed one foot of 20 AWG wire.
Figure 2-8. Transmitter Sensor
Wiring.
Thermocouple or Millivolt Inputs
For direct-mount applications, connect the thermocouple directly to the
transmitter. If mounting the transmitter remotely from the sensor, use
appropriate thermocouple extension wire. Make connections for millivolt
inputs with copper wire. Use shielding for long runs of wire.
NOTE
The use of two grounded thermocouples with a Model 3244MV is not
recommended. For applications in which the use of two thermocouples is
desired, connect either two ungrounded thermocouples, one grounded and
one ungrounded thermocouple, or one dual element thermocouple.
2-wire RTD
and Ohms
3-wire RTD
and Ohms
4-wire RTD
and Ohms
Thermocouples
and Millivolts
RTD with
Compensation
Loop*
2-9
T/Hot
Backup/Dual
Sensor with 2
RTDs
* The transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a
compensation loop.
T/Hot
Backup/Dual
Sensor with 2
TCs
T/Hot
Backup/Dual
Sensor with
RTD/TC
T/Hot
Backup/Dual
Sensor with
TC/RTD
T/Hot
Backup/Dual
Sensor with 2
RTDs with
Compensation
Loop
3144-0000F05A
Reference Manual
00809-0100-4799, Rev BA
Model 3244MV
September 2002
SET THE SWITCHES
Security After the transmitter is configured, it is possible to protect the configuration
data from unwarranted changes. Each transmitter is equipped with a security
switch that can be positioned “ON” to prevent the accidental or deliberate
change of configuration data. The switch is located on the front side of the
electronics module and is labeled SECURITY (see Figure 2-9).
Simulate The simulate switch is used in conjunction with the Analog Input (AI) function
block. This switch is used to simulate the temperature measurement and is
used as a lock-out feature for the AI function block. To enable the simulate
feature, the switch must transition from “OFF” to “ON” after power is applied to
the transmitter (see Figure 2-9). This feature prevents the transmitter from
being accidentally left in simulator mode.
Figure 2-9. Transmitter
Switch Locations.
ON OFF
3244MV-0204J02A
2-10
Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
Section 3 Commissioning
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3
Parameter blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-4
PV Status Byte Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-12
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
Failure to follow these installation guidelines could result in death or serious injury:
• Make sure only qualified personnel perform the installation.
Explosions could result in death or serious injury:
• Do not remove the transmitter cover in explosive atmospheres
when the circuit is live.
• Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
• Both transmitter covers must be fully engaged to meet
explosion-proof requirements.
Electrical shock could cause death or serious injury. If the sensor is installed in a
high-voltage environment and a fault condition or installation error occurs, high voltage may
be present on transmitter leads and terminals.
• Use extreme caution when making contact with the leads and terminals.
Process leaks could result in death or serious injury:
• Install and tighten thermowells or sensors before applying pressure, or process
leakage may result.
• Do not remove the thermowell while in operation. Removing while in operation
may cause process fluid leaks.
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