Honeywell STT850 SMARTLINE User manual

STT850/750 Quick Start Guide 1
STT850/750 SmartLine Temperature Transmitter
Quick Start Guide
34-TT-25-04, Revision 8, January 2020
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 Protocols, User
Interface (HMI) Operation, Installation,
Configuration, Calibration,
Maintenance, Parts, Safety and
Approvals etc. including options.
Copyrights, Notices and
Trademarks
Copyright 2020 by Honeywell
Revision 8, January 2020
Trademarks
SFC, SmartLine, STT850 are
U.S. registered trademarks of
Honeywell Inc.
HART® and FOUNDATION™
Trademarks of FieldComm
Group™
Table of Contents
URL ...........................................................................................................1
Note...........................................................................................................1
Installation.................................................................................................1
Features and options ................................................................................ 1
Mounting the Transmitter..........................................................................1
Bracket Mounting................................................................................2
Optional Mounting Bracket .................................................................2
Conduit Entry Plugs and Adapters............................................................2
Wiring Connections and Power Up...........................................................2
Wiring Variations.................................................................................3
Input Sensor Wiring ............................................................................3
Digital Output Wiring........................................................................... 4
Setting Failsafe Direction and Write Protect Jumpers........................ 4
Write Protect Jumper on Foundation Fieldbus (FF) .................................5
Figures
Figure 1 – Electronics Housing Components ...........................................1
Figure 2 –STT with adapter housing - Horizontal Wall Mounting.............1
Figure 3 - Pipe Mount, Vertical ................................................................. 1
Figure 4 - Pipe Mount with adapter housing - Horizontal & Vertical......... 2
Figure 5: Flat and Angle Mounting Brackets secured to Horizontal or
Vertical Pipe..............................................................................................2
Figure 6: Electronic Housing Conduit Entries........................................... 2
Figure 7: HART and DE Transmitter Operating Ranges..........................2
Figure 8: Transmitter 9-Screw Terminal Board and Grounding Screw....3
Figure 9: HART/DE/FF Single Input Wiring Diagram ...............................3
Figure 10: DE Dual Input Wiring Diagram ................................................ 3
Figure 11: HART/FF – Dual Input Wiring Diagram................................... 3
Figure 12: HART/FF Dual Input Wiring Diagram, mixed sensors ............ 3
Figure 13: Digital Output Connections for mA Load (HART only)............4
Figure 14: Digital Output Connections for PLC Counting Input (HART
only)........................................................................................................... 4
Figure 15: Jumper Location HART/DE.....................................................4
Figure 16: Jumper Settings....................................................................... 4
Figure 17: Fieldbus Write Protect .............................................................5
Documentation
To access complete documentation, including language variants, scan
the QR code below using your smart phone/device or QR code scanner.
Go to the APP store for your free Smartphone QR scanner
Or you can follow the URL to access the online SmartLine HUB page.
The HUB page will contain direct links to open SmartLine product
documentation.
URL QR Code
https://hwll.co/SmartLineHUB
Note
This is a generic Quick Start Guide for both STT850 and STT750
transmitters. Please note the following do not apply to the STT750:
Foundation Fieldbus, DE, Dual Inputs, Advanced Display, Advanced
Diagnostic, MID and Marine approvals.
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 STT850 and STT750 are 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 1shows the assemblies in the Electronics
Housing with available options.
Figure 1 – Electronics Housing Components
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.
Mounting the Transmitter
Transmitter models can be attached to a two-inch (50 millimeter) vertical
or horizontal 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 (Pipe
mount) and 50095918 (Wall mount) for detailed mounting specifications.
For Housing without adaptor refer to Honeywell drawings 32306827 (No-
Adaptor, Pipe mount) and 32306828 (No-adaptor, Wall mount).
TRANSMITTER ENCLOSURE CAN BE ROTATED A TOTAL OF 90O
FROM THE STANDARD MOUNTING POSITION
Figure 2 –STT with adapter housing - Horizontal Wall Mounting
Figure 3 - Pipe Mount, Vertical

STT850/750 Quick Start Guide 2
Figure 4 - Pipe Mount with adapter housing - Horizontal & Vertical
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 in the bracket. Secure the
bracket with the nuts, flat washers and lock washers provided.
3. 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 Figure 5
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
HORIZONTAL ANGLE PIPE VERTICAL ANGLE PIPE
Figure 5: Flat and Angle Mounting Brackets secured to Horizontal or Vertical Pipe
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.
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: HART* and DE Transmitter Operating Ranges
*Only HART available for STT750 transmitter
For DE operation, add 3.0V to these values.
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.

STT850/750 Quick Start Guide 3
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.
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 and is not applicable for Fieldbus option.
Terminal #4 is for Digital Output and is not applicable for Fieldbus option.
Foundation Fieldbus not applicable to STT750
For HART and DE the Transmitter is designed to operate in a two-wire power/current loop
with loop resistance and power supply voltage within the operating range; see Figure 7
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.
Wiring Variations
The above procedures are used to connect power to a Transmitter. For loop wiring and
external wiring, detailed drawings are provided for Transmitter installation in
non-intrinsically safe areas and for intrinsically safe loops in hazardous area locations.
This procedure shows the steps for connecting power to the transmitter.
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 the SmartLine Transmitter User’s Manual 34-TT-25-03
(STT850) or 34-TT-25-06 (STT850) for details.
Input Sensor Wiring
Connect the input sensors as shown in Figures below:
Figure 9:HART/DE/FF Single Input Wiring Diagram.
Figure 9: HART/DE/FF Single Input Wiring Diagram
RTD Thermocouple, mV and Ohm Connections
*STT750 Hart only
Figure 10:DE Dual Input Wiring Diagram
oResistance temperature detector (RTD) measurements use the 3
or 4 wire approach.
oDual-input units wired for a 4-wire RTD will automatically disable
Input 2.
oTo minimize common noise problems in the application, a
strap/jumper should be wired between terminals 6 and 8.
For differential T/C operation on DE Models, a second strap/jumper should be wired
between terminals 6 and 7. Do not install this strap for Non-DE models. The output for
differential operation is calculated as T/C 1 - T/C 2.
o
Figure 10: DE Dual Input Wiring Diagram
Thermocouple and RTD Connections (not applicable to single input sensor)
DE not applicable to STT750 transmitter
Figure 11: HART/FF – Dual Input Wiring Diagram
RTD Thermocouple, mV and Ohm Connections
Figure 12:HART/FF Dual Input Wiring Diagram
oFor External C/J compensation, the first input is a
thermocouple type and the second input is a 3-wire PT100
ohm RTD
oThe STT850 can have different sensor types on its inputs
for split range or averaging applications
Figure 12: HART/FF Dual Input Wiring Diagram, mixed sensors
Remote C/J and Mixed Sensors Connections

STT850/750 Quick Start Guide 4
Digital Output Wiring
Digital Output is available only on HART transmitters. The Digital Output should not use the
same power supply as used to support the 4-20mA transmitter output. See Figure 13 and
Figure 14.
For Intrinsically Safe (IS) applications, the 4-20mA and the Digital Output must use
separate IS Barriers.
Figure 13: Digital Output Connections for mA Load (HART only)
For best performance, it is recommended that:
•Digital Output wires should be in a separate shielded twisted pair cable, do
not use the same cable as used for the Loop or the Sensor wires
•If using the same power supply to operate both the 4-20mA Loop and the
Digital Output, then make the interconnections to the power supply terminals
directly at the power supply
NOTE: Intrinsically Safe Installations require the use of separate IS Barriers for the
4-20mA output and for the Digital Output connections
Figure 14: Digital Output Connections for PLC Counting Input (HART
only)
Explosion-Proof Conduit Seal
When installed as explosion proof in a Division 1 Hazardous Location, keep
covers tight while the Transmitter is energized. Disconnect power to the
Transmitter in the non-hazardous area prior to removing end caps for service.
When installed as non-incendive equipment in a Division 2 hazardous location,
disconnect power to the Transmitter in the non-hazardous area, or determine that the
location is non-hazardous before disconnecting or connecting the Transmitter wires.
Transmitters installed as explosion proof in Class I, Division 1, Group A Hazardous
(classified) locations in accordance with ANSI/NFPA 70, the US National Electrical
Code, require a LISTED explosion proof seal to be installed in the conduit, within 18
inches (457.2 mm) of the Transmitter. Crouse-Hinds type EYS/EYD or EYSX/EYDX are
examples of LISTED explosion proof seals that meet this requirement. Transmitters
installed as explosion proof in Class I, Division 1, Group B, C or D hazardous
(classified) locations do not require that explosion proof seal be installed in the conduit.
Step
Action
1 See Figure 8, above, for parts locations. Loosen the end cap lock
using a 1.5 mm Allen wrench.
2
Remove the end cap cover from the terminal block end of the
Electronics Housing
3
Feed loop power leads through one end of the conduit entrances on
either side of the Electronics Housing. The Transmitter accepts up to
16 AWG wire.
4
Connect the positive loop power lead to the positive (+) terminal and
the negative loop power lead to the negative (-) terminal. Note that
the Transmitter is not polarity-sensitive.
Shielded, twisted-pair cable such as Belden 9318 or equivalent must
be used for all signal/power wiring.
Note: If solid core wire is used strip insulation 1/4 in (6 mm). Once
inserted under the square washer the stripped portion should be
contained under the square washer. If multi-stranded wire is used, a
ferrule is to be used and the stripped wire should be in the insulated
portion of the ferrule. The ferrule can be also be used on the solid
core wire.
After wiring the Transmitter as outline in the next sections, torque the
screws to 1.1 Nm (10 lb-in)
5 Feed input sensor wires through the 2nd conduit entrance and
connect wire per wiring diagrams
6
Replace the end cap, and secure it in place
Configuration Guide
This transmitter comes with a standard factory configuration. Consult the nameplate for
basic information.
Reconfiguration for your particular application can be accomplished by following
instructions in the Transmitter User’s manual.
This can be found by following the website URL or QR code on page 1 of this
document.
Set the Jumpers For HART/DE
Setting Failsafe Direction and Write
Protect Jumpers
The SmartLine Temperature Transmitter
(DE or HART) provides two jumpers to
set the desired failsafe action andWrite
Protect option. See
Figure 15
The top jumper on the electronics
module sets the Failsafe direction. The
default setting is up-scale failsafe.
Up Scale drives the loop to a value
greater than 21mA while Down Scale
drives the loop to a value less than
3.8mA.
You can change the failsafe direction by
moving the Failsafe Jumper (top jumper)
to the desired position (UP or DOWN).
If your transmitter is operating in DE
mode, the upscale failsafe action will
cause the transmitter to generate a
“+ infinity” digital signal, while a
downscale failsafe will cause the
transmitter to generate a “– infinity”
digital signal.
The bottom jumper sets the Write
Protect. The default setting is OFF (Un-
protected).
When set to the On (Protected) position,
Changed configuration parameters
cannot be written to the transmitter.
When set to the OFF (Un-protected)
position, Changed configuration
parameters can be written to the
transmitter.
ATTENTION: Electrostatic
Discharge (ESD) hazards. Observe
precautions for handling
electrostatic sensitive devices
Step
Action
1
Turn OFF Transmitter power.
2
Loosen the end-cap lock, and
unscrew the end cap from the
Electronics side of the Transmitter
housing.
3
If there is a Display module,
carefully depress the tabs on the
sides of the Display Module and
pull it off.
If necessary, move the interface
connector from the Communication
Module. Do not discard connector
4
Set the Failsafe Jumper (top
jumper) to the desired action (UP
or DOWN). And the Write Protect
jumper (Bottom jumper) to the
desired behavior (Protected or
Unprotected) See Figure 16 for
jumper positioning.
5
If applicable, re-install the Display
module as follows:
• Orient the display as desired.
• Install the Interface Connector in
the Display module such that it will
mate with the socket for the display
in the Communication module.
• Carefully line up the display,
and snap it into place. Verify that
the two tabs on the sides of the
display latch.
6
Screw on the end cap and tighten
the end-cap lock. Turn ON
Transmitter power.
Figure 15: Jumper Location HART/DE
Jumper Settings
Description
Failsafe = UP (High)
Write Protect = OFF (Not Protected)
Failsafe = DOWN (Low)
Write Protect = OFF (Not Protected)
Failsafe = UP (High)
Write Protect = ON (Protected)
Failsafe = DOWN (Low)
Write Protect = ON (Protected)
Figure 16: Jumper Settings

STT850/750 Quick Start Guide 5
Write Protect Jumper on Foundation Fieldbus (FF)
On Foundation Fieldbus transmitters there is no Failsafe jumper selection but there is a
Write Protect jumper.
The bottom jumper sets the Write Protect. The default setting is OFF (Un-protected).
When set to the On (Protected) position, changed configuration parameters cannot be
written to the transmitter.
When set to the OFF (Un-protected) position, changed configuration parameters can be
written to the transmitter.
Fieldbus not applicable to STT750
ATTENTION: Electrostatic Discharge (ESD) hazards. Observe
precautions for handling electrostatic sensitive devices.
WARNING! PERSONAL INJURY: Risk of electrical shock. Disconnect
power before proceeding. HAZARDOUS LIVE voltages greater than
30 Vrms, 42.4 Vpeak, or 60 VDC may be accessible. Failure to
comply with these instructions could result in death or serious injury.
Step
Action
1
Turn OFF Transmitter power.
2 Loosen the end-cap lock, and unscrew the end cap from the
Electronics side of the Transmitter housing.
3 If applicable, carefully depress the tabs on the sides of the Display
Module and pull it off. If necessary, move the interface connector from
the Communication Module to the display module to provide the
preferred orientation of the display module in the window.
4 Set the Write Protect jumper (Bottom jumper) to the desired behavior
(Protected or Unprotected). See Figure 17 for jumper positioning.
5
Screw on the end cap and tighten the end-cap lock.
6
Turn ON Transmitter power.
Image Description
Fieldbus SIM Mode = OFF
Write Protect = OFF (Not Protected)
Fieldbus SIM Mode = OFF
Write Protect = ON (Protected)
Fieldbus SIM Mode = ON
Write Protect = OFF (Not Protected)
Figure 17: Fieldbus Write Protect
Appendix A. PRODUCT CERTIFICATIONS
A1. Safety Instrumented Systems (SIS) Installations
For Safety Certified Installations, please refer to STT850/750 Safety Manual
#34-TT-25-05 for installation procedure and system requirements.
A2. European Directive Information (EU)
https://www.honeywellprocess.com/library/support/Public/Documents/
50094560.pdf
A3. Hazardous Locations Certifications
AGENCY
TYPE OF PROTECTION
COMM
OPTION
Electrical
Parameters
Ambient
Temperature
FM
Approvals TM
(USA)
Explosion proof,
Certificate:
FM16US0157X:
Class I, Division 1,
Groups A, B, C, D;
Dust Ignition Proof:
Class II, III, Division 1,
Groups E, F, G; T6..T5
Class 1, Zone 1, AEx d IIC
T6..T5 Gb
Class 2, Zone 21, AEx tb
IIIC T 95
o
C IP 66 Db
4-20 mA/
DE/HART/
FF/
PROFIBUS
Note 1
T5: Ta= -50oC
to 85oC
T6: Ta= -50oC
to 65oC
Intrinsically Safe,
Certificate:
FM16US0157X:
Class I, II, III, Division 1,
Groups A, B, C,
D, E, F, G; T4
Class I Zone 0 AEx ia IIC
T4 Ga
FISCO Field Device (Only
for FF Option)
Ex ia IIC T4
4-20 mA/
DE/HART
/FF/
PROFIBUS
Note 2
-50oC to 70oC
Non-Incendive,
Certificate:
FM16US0157X:
Class I, Division 2,
Groups A, B, C, D; T4
Class I Zone 2 AEx nA IIC
T4 Gc
AEx nA IIC T4
4-20 mA/
DE/HART
/FF/
PROFIBUS
Note 1 -50oC to 85oC
Standards: FM 3600:2011; ANSI/ ISA 60079-0: 2013
FM 3615:2006; ANSI/ ISA 60079
-1 : 2015
FM 3616 : 2011 ; ANSI/ ISA 60079
-31 : 2015
FM 3610:2010; ANSI/ ISA 60079
-11 : 2014
FM 3810 : 2005 ; FM 3611:2004; ANSI/ ISA 60079
-15 : 2012 ;
FM 3810 : 2005 ; NEMA 250 : 2003 ; ANSI/ IEC 60529 : 2004
Enclosure: Type 4X/
IP66/ IP67
ALL
ALL
ALL
CSA-
Canada
Explosion proof, Certificate:
2689056:
Class I, Division 1, Groups A, B,
C, D;
Dust Ignition Proof:
Class II, III, Division 1, Groups
E, F, G; T4
Zone 1 Ex d IIC T4 Gb
Ex tb IIIC T 95oC IP 66 Db
DIP A21 Class II, III
4-20 mA/
DE/HART/
FF
Note 1
T5: Ta= -50oC to
85oC
T6: Ta= -50oC to
65oC
Intrinsically Safe, Certificate:
2689056:
Class I, II, III, Division 1, Groups
A, B, C, D, E, F, G; T4
Ex ia IIC T4 Ga
FISCO Field Device (Only for FF
Option)
Ex ia IIC T4
4-20 mA/
DE/HART/
FF
Note 2 -50oC to 70oC
Non-Incendive, Certificate:
2689056:
Class I, Division 2, Groups A, B,
C, D; T4
Class I Zone 2 Ex nA IIC T4 Gc
Ex nA IIC T4 Gc
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Enclosure: Type 4X/ IP66/ IP67
ALL ALL ALL
Standards:
CSA C22.2 No. 0-10; CSA 22.2 No. 25-1966 (reaffirmed 2009);
CSA C22.2 No. 30-M1986 (reaffirmed 2012); CSA C22.2 No. 94-M91;
CSA C22.2 No. 142-M1987 (reaffirmed 2009); CSA-C22.2No.157-92 (reaffirmed
2012);
C22.2 No. 213-M1987(reaffirmed 2012); C22.2 No. 60529-05
C22.2 No. CSA 60079-0:2011; C22.2 No. 60079-1: 2011; C22.2 No. 60079-11:
2011;
C22.2 No. 60079-15: 2012; C22.2 No. 60079-31: 2012;
ANSI/ ISA12.12.01-2012; ANSI/ ISA 60079-0 (12.00.01): 2009 ;
ANSI/ ISA 60079-1 (12.22.01): 2009 ; ANSI/ ISA 60079-11(12.02.01) : 2012;
ANSI/ ISA 60079-26 (12.00.03) : 2011; ANSI/ ISA 60079-15(12.12.02) : 2012 ;
ANSI/ ISA 60079-27 (12.02.04) : 2006; ANSI/ ISA 60079-31(12.10.03) : 2009 ;
FM Class 3615: Aug 2006; FM Class 3616: Dec 2011; ANSI/ IEC 60529 : Edition 2.1
ANSI/ UL 913: Edition 7; ANSI/ UL 916 : Edition 4 ;

STT850/750 Quick Start Guide 6
ATEX
Flameproof, Sira 14ATEX2046X:
II 2 G Ex db IIC T6..T5 GbII 2 D Ex
tb IIIC T 95oC Db IP 66/ IP67
4-20 mA/
DE/HART/FF Note 1
T5: Ta= -50oC to
85oC
T6: Ta= -50oC to
65
o
C
Intrinsically Safe, Sira
14ATEX2046X:
II 1 G Ex ia IIC T4 Ga
FISCO Field Device (Only for FF
Option)
Ex ia IIC T4
4-20 mA/
DE/HART/FF Note 2
-50oC to 70oC
FISCO:
-50oC to 45oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
Standards: EN 60079-0:2012/A11:2013; EN 60079-1:2014; EN 60079-
11:2012; EN 60079-31:2014
Non Sparking, Sira
14ATEX4052X:
II 3 G Ex ec IIC T4 Gc
II 3 G Ex ic IIC T4 Gc
4-20 mA/
DE/HART
FF
Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
Standards: EN 60079-0:2012/A11:2013; EN 60079-7:2015; EN 60079-11:2012
IECEx
Flameproof, SIR 14.0020X
Ex db IIC T6..T5 Gb
Ex tb IIIC T 95oC IP 66/ IP67
4-20 mA/
DE/HART/FF Note 1
T5: Ta= -50oC to
85oC
T6: Ta= -50oC to
65
o
C
Intrinsically Safe, SIR 14.0020X
Ex ia IIC T4 Ga
FISCO Field Device (Only for FF
Option)
Ex ia IIC T4
4-20 mA/
DE/HART/ FF Note 2
-50oC to 70oC
FISCO:
-50oC to 45oC
Non Sparking, SIR 14.0020X
Ex ec IIC T4 Gc
Ex ic IIC T4 Gc
4-20 mA/
DE/HART/ FF Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
Standards: IEC IEC 60079-0:2011; IEC 60079-1:2014; IEC 60079-11:2011; IEC 60079-
31:2013; IEC 60079-7: 2015
SAEx
(South
Africa)
Flameproof:
Ex d IIC T4 Gb
Ex tb IIIC T 85
o
C IP 66 Db
4-20 mA/
DE/HART/FF Note 1 -50oC to 85oC
Intrinsically Safe:
Ex ia IIC T4 Ga
FISCO Field Device (Only for FF
Option)
Ex ia IIC T4
4-20 mA/
DE/HART/FF Note 2 -50oC to 70oC
Non Sparking:
Ex nA IIC T4 Gc
4-20 mA/
DE/HART/FF
Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
INMETRO
Flameproof:
Ex d IIC T4 Gb
Ex tb IIIC T 95
o
C IP 66 Db
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Intrinsically Safe:
Ex ia IIC T4 Ga
FISCO Field Device (Only
for FF Option)
Ex ia IIC T4
4-20 mA/
DE/HART/
FF
Note 2 -50oC to 70oC
Non Sparking:
Ex nA IIC T4 Gc
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
NEPSI
(CHINA)
Flameproof:
Ex d IIC T4 Gb
Ex tb IIIC T 85
o
C IP 66
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Intrinsically Safe:
Ex ia IIC T4
FISCO Field Device (Only
for FF Option)
Ex ia IIC T4
4-20 mA/
DE/HART/
FF
Note 2 -50oC to 70oC
Non Sparking:
Ex nA IIC T4
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
KOSHA
(KOREA)
Flameproof:
Ex d IIC T4 Gb
Ex tD A21 T 95oC IP 66/
IP67
4-20 mA/
DE/HART/
FF
Note 1 -50oC to 85oC
Intrinsically Safe:
Ex ia IIC T4
FISCO Field Device (Only
for FF Option)
Ex ia IIC T4
4-20 mA/
DE/HART/
FF
Note 2 -50oC to 70oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
EAC Ex
(Russia,
Belarus and
Kazakhstan)
Flameproof:
1 Ex d IIC T4 Gb
Ex tb IIIC T95
o
C Db
4-20 mA/
DE/HART/FF Note 1 -50oC to 85oC
Intrinsically Safe:
0 Ex ia IIC T4 Ga
Ex ia IIIC T4 Db
FISCO Field Device (Only for
FF Option)
0 Ex ia IIC T4
4-20 mA/
DE/HART/FF Note 2
-50oC to 70oC
FISCO:
-50oC to 45oC
Non Sparking:
2 Ex nAc IIC T4
4-20 mA/
DE/HART/FF
Note 1 -50oC to 85oC
Enclosure: IP66/ IP67
ALL
ALL
ALL
CCoe
(India)
Ex ia IIC T4 Ga
4-20 mA/
DE/HART/FF Note 2
-50oC to 70oC
FISCO:
-50
o
C to 45
o
C
Ex d IIC T4 Gb
4-20 mA/
DE/HART/FF
Note 1 -50oC to 85oC
Notes
1. Operating Parameters:
4-20 mA/DE/HART (Loop Terminal)
Voltage= 11 to 42 V Current= 4-20 mA Normal (3.8 – 23 mA Faults)
FF (Loop Terminal)
Voltage= 9 to 32 V Current= 25 mA
2. Intrinsically Safe Entity Parameters
Terminals 1 and 2- LOOP: Ui = 30 Vdc, Ii = 225 mA, Pi = 900 mW, Ci = 4 nF, Li = 0 µH
Terminals 5, 6, 7, 8, 9- SENSOR: Ci = 4 nF, Li = 0 µH
DIGITAL OUTPUT OPTION:
Terminals 1 and 2- LOOP: Ui = 30 Vdc, Ii = 225 mA, Pi = 900 mW, Ci = 4 nF, Li = 0 µH
Terminals 4 and 9, DO OPTION: Ui = 30 Vdc, Ii = 40 mA, Pi = 500 mW, Ci = 4 nF, Li = 0 µH
Terminals 5, 6,7, 8 - SENSOR: Ci = 4 nF, Li = 0 µH
SIL 2/3
Certification
IEC 61508 SIL 2 for non-redundant use and SIL 3 for redundant
use according to EXIDA and TÜV Nord Sys Tec GmbH & Co. KG
under the following standards: IEC61508-1: 2010; IEC 61508-2:
2010; IEC61508-3: 2010.
MID Approval
(not STT750)
Issued by NMi Certin B.V. in accordance with WELMEC guide 8.8,
OIML R117.1 Edition 2007 (E), and EN 12405-1+A2 Edition 2006.
Applicable to Pt100 sensor only.
MARINE TYPE
APPROVAL
(not STT750)
Lloyd’s Register Certificate Number: 16/60011
Environmental categories ENV1, ENV2, ENV3 and ENV5 as
defined in Lloyd’s Register Test Specification No. 1, February 2015
A4. Marking ATEX Directive
General:
The following information is provided as part of the labeling of the transmitter:
• Name and Address of the manufacturer
• Notified Body identification: DEKRA Quality B.V., Arnhem, the Netherlands
• For complete model number, see the Model Selection Guide for the particular
model of Temperature Transmitter.
• The serial number of the transmitter is located on the Housing data-plate. The
first two digits of the serial number identify the year (02) and the second two
digits identify the week of the year (23); for example, 0223xxxxxxxx indicates that
the product was manufactured in 2002, in the 23 rd week.
Apparatus Marked with Multiple Types of Protection
The user must determine the type of protection required for installation the
equipment. The user shall then check the box [�] adjacent to the type of
protection used on the equipment certification nameplate. Once a type of
protection has been checked on the nameplate, the equipment shall not then be
reinstalled using any of the other certification types.
WARNINGS and Cautions:
Intrinsically Safe and Non-Incendive Equipment:
WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR
SUITABILITY FOR USE IN HAZARDOUS LOCATIONS.
Explosion-Proof/ Flameproof:
WARNING: DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE
MAY BE PRESENT
Non-Incendive Equipment:
WARNING: DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE
MAYBE PRESENT
All Protective Measures:
WARNING: FOR CONNECTION IN AMBIENTS ABOVE 60oC USE WIRE
RATED 105oC

STT850/750 Quick Start Guide 7
A.5 Conditions of Use” for Ex Equipment”, Hazardous Location Equipment or
“Schedule of Limitations”:
Consult the manufacturer for dimensional information on the flameproof joints for
repair.
Painted surface of the STT850 may store electrostatic charge and become a source
of ignition in applications with a low relative humidity less than approximately30%
relative humidity where the painted surface is relatively free of surface
contamination such as dirt, dust or oil. Cleaning of the painted surface should only
be done with a damp cloth.
Intrinsically Safe: Must be installed per drawing 50091227
Division 2: This equipment is suitable for use in a Class I, Division 2, Groups A, B, C,
D; T4 or Non-Hazardous Locations Only.
The installer shall provide transient over-voltage protection external to the
equipment such that the voltage at the supply terminal of the equipment does not
exceed 140% of the voltage rating of the equipment.
The enclosure is manufactured from low copper aluminium alloy. In rare cases,
ignition sources due to impact and friction sparks could occur. This shall be
considered during Installation, particularly if equipment is installed a Zone 0
location.
If a charge-generating mechanism is present, the exposed metallic part on the
enclosure is capable of storing a level of electrostatic that could become incendive
for IIC gases. Therefore, the user/ installer shall implement precautions to prevent
the buildup of electrostatic charge, e.g. earthing the metallic part. This is
particularly important if equipment is installed a Zone 0 location.
A.6 Control Drawing

For more information
To learn more about SmartLine transmitters, visit www.honeywellprocess.com.
Or contact your Honeywell Account Manager
Process Solutions
Honeywell
1250 W Sam Houston Pkwy S
Houston, TX 77042
Honeywell Control Systems Ltd
Honeywell House, Skimped Hill Lane
Bracknell, England, RG12 1EB
34-TT-25-04 Rev.8
January 2020
2020 Honeywell International Inc.
Shanghai City Centre, 100 Jungi Road
Shanghai, China 20061
www.honeywellprocess.com
Sales and Service
For application assistance, current specifications, pricing, or name of the nearest
Authorized Distributor, contact one of the offices below.
ASIA PACIFIC (TAC) [e-mail]
Australia Honeywell Limited, Phone: +(61) 7-3846 1255, FAX: +(61) 7-3840 6481
Toll Free 1300-36-39-36, Toll Free Fax: 1300-36-04-70
China – PRC – Shanghai, Honeywell China Inc. Phone: [phone],
Fax: [phone]
Singapore, Honeywell Pte Ltd. Phone: +(65) 6580 3278. Fax: +(65) 6445-3033
South Korea, Honeywell Korea Co Ltd. Phone:+[phone]. Fax:+(822) 792
9015
EMEA, Phone: + 80012026455 or [phone]. FAX: [phone]
Email: (Sales) [e-mail]
or (TAC) [e-mail]
Web: Knowledge Base search engine http://bit.ly/2N5Vldi
AMERICAS, Honeywell Process Solutions, Phone: [phone],
or 1-215/641-3610. (TAC) [e-mail].
Sales 1-800-343-0228. Email: (Sales) [e-mail]
Web: Knowledge Base search engine http://bit.ly/2N5Vldi
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of defective materials and faulty
workmanship. Contact your local sales office for warranty information.
If warranted goods are returned to Honeywell during the period of coverage, Honeywell will
r
epair or replace without charge those items it finds defective. The foregoing is Buyer's sole
remedy and is
in lieu of all other warranties, expressed or implied, including those of
merchantability and fitness for a particular purpose. Specifications may c
hange without
notice. The information we supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.
While we provide application assistance personally, through our literature and the
Honeywell web site, it is up to the customer to determine the suitability of the product in
the application.