Honeywell STT850 Quick Start Manual

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.
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.
nstallation
I
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 1 shows 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.
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™
STT850/750 Quick Start Guide

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

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
1