Honeywell STT750 SmartLine Instruction Manual

STT750 SmartLine
Temperature Transmitter
Quick Start Installation Guide
34-TT-25-14, Revision 4, September 2017
Honeywell Process Solutions
This document provides descriptions
and procedures for the Quick Installation
of Honeywell’s family of SmartLine
Temperature Transmitters.
The SmartLine Temperature Transmitter
is available in a variety of models for
measuring Ohms, mV and temperature
from RTD’s and thermocouples.
For full details refer to the manuals
listed below for Protocol, User Interface
(HMI) Operation, Installation,
Configuration, Calibration, Maintenance,
Parts, Safety and Approvals etc.
including options.
Various other documents are available
on the CD supplied with your shipment.
Documents in hardcopy can also be
ordered.
Copyrights, Notices and Trademarks
Copyright 2017 by Honeywell
Revision 4, September 2017
Trademarks
SFC, SmartLine, STT750 are U.S.
registered trademarks of Honeywell Inc.
HART®is a trademark of FieldComm
Group™
Revision history
Rev.1 –1st release
Rev.2 –Display menu updates, CVD
and Angle brackets added
Rev.3 –Display menu updates
Rev.4 - Mounting drawings updated
References
The following list identifies all documents that may be sources of reference for material
discussed in this publication.
Document Title
Document #
STT750 SmartLine Transmitter User’s Manual
34-TT-25-13
STT750 SmartLine Transmitter HART User Manual
34-TT-25-15
SmartLine Temperature Safety Manual
34-TT-25-05
STT750 Pocket Configuration Guide
34-TT-00-02
STT750 Specification
34-TT-03-16
MC Toolkit User Manual (MCT202)
MC Toolkit User Manual (MCT404)
34-ST-25-20
34-ST-25-50

SmartLine Temperature Transmitter
2 Quick Start Installation Guide
Table of Contents
Installation.................................................................................................................... 3
Features and options.................................................................................................... 3
Mounting the Transmitter ............................................................................................. 4
Bracket Mounting..................................................................................................5
Optional Mounting Bracket....................................................................................6
Conduit Entry Plugs and Adapters...............................................................................7
Wiring Connections and Power Up...............................................................................8
Wiring Variations.................................................................................................10
Input Sensor Wiring............................................................................................. 10
Explosion-Proof Conduit Seal .................................................................................... 11
Set the Jumpers For HART........................................................................................ 12
Setting Failsafe Direction and Write Protect Jumpers.........................................12
Configuration Guide ...................................................................................................14
Tables
Table 1 - Jumper Settings..........................................................................................13
Table 2 –Available Display Characteristics ...............................................................14
Table 3 –Basic Display Configuration........................................................................14
Figures
Figure 1 –Electronics Housing Components ............................................................... 3
Figure 2 –STT750 with adapter housing - Horizontal Wall Mounting...........................4
Figure 3 –STT750 Pipe Mount, Vertical ......................................................................4
Figure 4 –STT750 Pipe Mount with adapter housing - Horizontal & Vertical...............5
Figure 5: Flat and Angle Mounting Brackets secured to Horizontal or Vertical Pipe ....6
Figure 6: Electronic Housing Conduit Entries............................................................... 7
Figure 7: STT750 HART/DE Transmitter Operating Ranges........................................ 8
Figure 8: Transmitter 9-Screw Terminal Board and Grounding Screw......................... 9
Figure 9 –STT750 Thermocouple, RTD, mV, Ohm and Volt Connections................ 10
Figure 10: Jumper Location HART............................................................................13

Quick Start Installation Guide 3
INSTALLATION
Evaluate the site selected for the Transmitter installation with respect to the process
system design specifications and Honeywell’s published performance characteristics
for your particular model.
Temperature extremes can affect display quality. The display can become unreadable
at temperature extremes; however, this is only a temporary condition. The display will
again be readable when temperatures return to within operable limits.
FEATURES AND OPTIONS
The STT750 is packaged in one major assembly: the Electronics Housing.
The elements in the Electronic Housing are connected to the process sensors,
measure the process variables, respond to setup commands and execute the software
and protocol for the different temperature measurement types. Figure 1 shows the
assemblies in the Electronics Housing with available options.
Figure 1 –Electronics Housing Components
The Transmitter measures process Temperature and outputs a signal proportional to
the measured process variable (PV), including 4 to 20mA.
An optional 3-button assembly is located under the nameplate and provides a user
interface and operation capability without opening the transmitter to set up and make
adjustments to the Transmitter.

SmartLine Temperature Transmitter
4 Quick Start Installation Guide
MOUNTING THE TRANSMITTER
Transmitter models can be attached to a two-inch (50 millimeter) vertical or horizontal
flat pipe using Honeywell’s optional angle; alternately you can use your own bracket.
Honeywell’s optional wall mounting bracket is also shown below:
For Housing with Adaptor refer to Honeywell drawings 50095917 (Flat pipe mount)
and 50095918 (Wall mount) for detailed mounting specifications.
For Housing without adaptor refer to Honeywell drawings 32306827 (No-Adaptor, Flat
pipe mount) and 32306828 (No-adaptor, Wall mount).
TRANSMITTER ENCLOSURE CAN BE ROTATED A TOTAL OF 90O FROM THE
STANDARD MOUNTING POSITION
Figure 2 –STT750 with adapter housing - Horizontal Wall Mounting
Figure 3 –STT750 Pipe Mount, Vertical

Quick Start Installation Guide 5
Figure 4 –STT750 Pipe Mount with adapter housing - Horizontal & Vertical
* Note 1: In Figures 2, 3 and 4, Housing adapter may not be present on all transmitter
models. If the housing adapter is not present, subtract 24,5mm (0,96 inches) from the
dimension specified.
Refer to the User’s manual for dimension drawings
Bracket Mounting
If you are using an optional bracket, start with Step 1.
1. Align the two mounting holes in the transmitter with the two slots in the
mounting bracket and assemble the (2) M8 hex cap screws, (2)
lockwashers and (2) flat washers provided. Rotate transmitter assembly
to the desired position and torque the M8 hex cap screws to 27,0 Nm/
20,0 Lb-ft maximum.
2. Pipe Mount Option: Refer to
Figure 5. Position the bracket on a 2-inch (50.8 mm) horizontal or
vertical pipe, and install a “U” bolt around the pipe and through the holes

SmartLine Temperature Transmitter
6 Quick Start Installation Guide
in the bracket. Secure the bracket with the nuts, flat washers and lock
washers provided.
5. Wall Mount Option: Position the bracket on the mounting surface at the
desired location and secure the bracket to the mounting surface using
the appropriate hardware (Wall mounting hardware requirements to be
determined and supplied by the end user). Existing mounting bracket,
see Error! Reference source not found.
Figure 5.
For Housings with and without Adapter refer to Honeywell drawing #50124813
(Angle pipe mounting) for detailed specifications.
Optional Mounting Bracket
Position bracket on 2-inch (50.8 mm) and install “U” bolt around pipe and through
holes in bracket. Secure with nuts and lock washers provided. Optional mounting
bracket, see
Figure 5.
HORIZONTAL FLAT PIPE VERTICAL FLAT PIPE

Quick Start Installation Guide 7
HORIZONTAL ANGLE PIPE VERTICAL ANGLE PIPE
Figure 5 - Flat and Angle Mounting Brackets secured to Horizontal or Vertical Pipe

SmartLine Temperature Transmitter
8 Quick Start Installation Guide
CONDUIT ENTRY PLUGS AND ADAPTERS
Procedures
It is the User/Installer’s responsibility to install the Transmitters in accordance with
national and local code requirements. Conduit entry plugs and adapters shall be
suitable for the environment, shall be certified for the hazardous location when
required and acceptable to the authority having jurisdiction for the plant.
CONDUIT ENTRY PRECAUTIONARY NOTICE
THE CONDUIT/CABLE GLAND ENTRIES OF THIS PRODUCT ARE SUPPLIED
WITH PLASTIC DUST CAPS WHICH ARE NOT TO BE USED IN SERVICE.
IT IS THE USER’S RESPONSIBILITY TO REPLACE THE DUST CAPS WITH
CABLE GLANDS, ADAPTORS AND/OR BLANKING PLUGS WHICH ARE
SUITABLE FOR THE ENVIRONMENT INTO WHICH THIS PRODUCT WILL BE
INSTALLED. THIS INCLUDES ENSURING COMPLIANCE WITH HAZARDOUS
LOCATION REQUIREMENTS AND REQUIREMENTS OF OTHER GOVERNING
AUTHORITIES AS APPLICABLE.
Figure 6 - Electronic Housing Conduit Entries
Note. No plugs come installed in the housings. All housings come with temporary
plastic dust protectors (red) installed and are not certified for use in any installation.

Quick Start Installation Guide 9
WIRING CONNECTIONS AND POWER UP
Summary
The transmitter is designed to operate in a two-wire power/current loop with loop
resistance and power supply voltage within the HART and DE operating ranges
shown in Figure 7.
Figure 7 - STT750 HART/DE Transmitter Operating Ranges
Loop wiring is connected to the Transmitter by simply attaching the positive (+) and
negative (–) loop wires to the positive (+) and negative (–) terminals on the
Transmitter terminal block in the Electronics Housing shown in Figure 8.
Connect the Loop Power wiring shield to earth ground only at the power supply end.
Note that the Transmitter is not polarity-sensitive.

SmartLine Temperature Transmitter
10 Quick Start Installation Guide
Figure 8 - Transmitter 9-Screw Terminal Board and Grounding Screw
As shown in Figure 8, each transmitter has an internal terminal to connect it to earth
ground. Optionally, a ground terminal can be added to the outside of the Electronics
Housing. Grounding the transmitter for proper operation is required, as doing so
tends to minimize the possible effects of noise on the output signal and affords
protection against lightning and static discharge.
An optional lightning terminal block can be installed in place of the non-lightning
terminal block for transmitters that will be installed in areas that are highly
susceptible to lightning strikes. As noted above, the Loop Power wiring shield should
only be connected to earth ground at the power supply end.
Note: Terminal pin 9 is not used.
Wiring must comply with local codes, regulations and ordinances.
Grounding may be required to meet various approval body certification,
for example CE conformity. Refer to Appendix A of this document for details.
Note: Terminal #3 is for loop test
The Transmitter is designed to operate in a two-wire power/current loop with loop
resistance and power supply voltage within the operating range; se
With an optional remote meter, the voltage drop for this must be added to the basic
power supply voltage requirements to determine the required Transmitter voltage
and maximum loop resistance. Additional consideration is required when selecting
intrinsic safety barriers to ensure that they will supply at least minimum Transmitter
voltage, including the required 250 ohms of resistance (typically within the barriers)
needed for digital communications. See Figure 7.