Honeywell STT700 SmartLine Instruction Manual

STT700 SmartLine
Temperature Transmitter
Quick Start Installation Guide
34-TT-25-19, Revision 1, July 2017
1 STT700 Quick Start Installation Guide July 2017
This document provides descriptions
and procedures for the Quick Installation
of Honeywell’s family of SmartLine
Temperature Transmitters.
The STT700 is available in a variety of
models for measuring Thermocouples,
RTD, Millivolts and Ohm sensor types.
For full details refer to the manuals
listed below for Operation, Installation,
Protocol, Configuration, Calibration,
Maintenance, Parts, Safety and
Approvals etc. including options.
Various other documents are available
on the CD supplied with your shipment.
Copyrights, Notices and Trademarks
Copyright 2017 by Honeywell
Revision 1, May 2017
Trademarks
SFC, SmartLine, STT700 are U.S.
registered trademarks of Honeywell Inc.
HART®is a trademark of FieldComm
Group™
Revision history
Rev.1, July 2017 –1st release
References
The following list identifies all documents that may be sources of reference for material
discussed in this publication.
Document Title
Document #
STT700 SmartLine Transmitter User’s Manual
34-TT-25-17
STT700 SmartLine Transmitter HART User Manual
34-TT-25-18
SmartLine Temperature Safety Manual
34-TT-25-20
STT700 Specification
34-TT-03-19
STT700 Surge Protection spec
34-TT-03-20
STT700 Field Device Specification (HART)
34-TT-00-05
MC Toolkit User Manual (MCT404)
34-ST-25-50
For start-up, operation (including configuration), maintenance and calibration refer to
the STT700 Transmitter User’s manual, #34-TT-25-17

SmartLine Temperature Transmitter
2 STT700 Quick Start Installation Guide July 2017
Table of Contents
Installation.................................................................................................................... 3
Features and options.................................................................................................... 3
Mounting the Transmitter ............................................................................................. 4
Wiring Connections and Power Up............................................................................... 7
Wiring Variations...................................................................................................9
Input Sensor Wiring............................................................................................... 9
Exlosion-Proof Conduit Seal ...................................................................................... 10
LIGHTNING PROTECTOR........................................................................................ 11
Tables
Table 1: Installation considerations.............................................................................. 3
Table 2: Mounting Dimensions..................................................................................... 5
Figures
Figure 1 –STT700 Temperature Transmitter (HART left, DE right)............................. 3
Figure 2: DIN Rail Mounting......................................................................................... 4
Figure 3: Wall Mounting Dimensions............................................................................5
Figure 4: Pipe Mounting Dimensions............................................................................ 5
Figure 5: Spring Loading and Sensor Assembly .......................................................... 6
Figure 6: STT700 HART Transmitter Operating Ranges.............................................. 7
Figure 7: STT700 DE Transmitter Operating Ranges .................................................. 7
Figure 8: STT 700 Terminal connections .....................................................................8
Figure 9: HART/DE Input Wiring Diagram for single sensor connection ......................9
Figure 10: Wiring Diagram for HART Dual Sensor Connections................................ 10
Figure 11: Lightning Protector Dimensions ................................................................ 11
Figure 12: Installation without EU Meter..................................................................... 12
Figure 13: Installation with EU Meter.......................................................................... 13

July 2017 STT700 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. Conditions to be considered include:
Table 1: Installation considerations
Environmental Conditions:
Process Parameters
Ambient temperature
Temperature
Relative Humidity
Maximum Sensor Input Ratings
Potential Noise Sources:
Vibration Sources
Radio Frequency Interference (RFI)
Pumps
Electromagnetic Interference (EMI)
Motorized System Devices
(e.g., pumps)
Valve Cavitation
In preparation for post-installation processes, refer to the MC Toolkit User Manual,
Document # #34-ST-25-50 (MCT404), for battery conditioning and device operation
and maintenance information.
FEATURES AND OPTIONS
As shown in Figure 1, the STT700 is packaged in a single module. The elements in
this module 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 –STT700 Temperature Transmitter (HART left, DE right)
The transmitter measures process temperature and outputs a signal proportional to
the measured process variable (PV). Available output communication protocols
include 4 to 20mA, Honeywell Digitally Enhanced (DE) and HART protocols.

SmartLine Temperature Transmitter
4 STT700 Quick Start Installation Guide July 2017
MOUNTING THE TRANSMITTER
DIN Rail Mounting
If the STT700 is to be installed on DIN Rail then the main considerations are electrical
connections and mechanical fixing. Electrical connections are identical to the bench
test instructions except that thermocouple wire is likely to be used with thermocouples.
Mechanical fixing of the module is by means of the snap-in DIN Rail Clips which are
screwed to the bottom lugs of the module.
Figure 2: DIN Rail Mounting
The DIN Rail needs to be connected to Earth Ground, refer to STT700 SmartLine
transmitter user’s manual, #34-TT-25-17.
Uninstalling/Installing EU Meter from Housing
EU Meter:
1. Remove the EU METER from the mounting bracket.
2. Unfasten the 2 mounting screws.
3. Remove the bracket.
To put the EU meter back follow the above sequence in the reverse order.
Housing Cover and O Ring:
1. Review O-ring condition & replace, if damaged. New O-ring can be
ordered from spare parts list.
2. Apply O-ring lubricant to the end cap O-ring. Relax O-ring twists, if any.
3. Assemble housing cover with sufficient torque for securing against IP.

July 2017 STT700 Quick Start Installation Guide 5
Mounting Module in Housing
The STT700 module can be installed in a variety of housings suitable for direct head
mounting, 2'' (50mm) pipe mounting or wall mounting.
Field Mount Housing
with Meter
Field Mount Housing
without Meter
Field Mount Housing
with and without Meter
Figure 3: Wall Mounting Dimensions
Field Mount Housing
with Meter
Field Mount Housing
without Meter
Field Mount Housing
with and without Meter
Figure 4: Pipe Mounting Dimensions
Table 2: Mounting Dimensions
Dimensions
Aluminum (field mount housing)
A
B
Without integral meter
70 mm [2.76 inch]
120,8 mm [4.76 inch]
With integral meter
127 mm [5.00 inch]
210,8 mm [8.30 inch]

SmartLine Temperature Transmitter
6 STT700 Quick Start Installation Guide July 2017
Spring Loading
Figure 5: Spring Loading and Sensor Assembly
Spring loading is available worldwide with direct head mounting. In North America, the
spring loading is typically included in the sensor/thermowell assembly and is available
with all housings. For non-North American spring loading as shown in Figure 5, simply
include the springs under the 33 mm pitch mounting screws, pass the screws through
the module and sensor mounting plate and snap in the retaining circlip to the screws
to hold the assembly together. Guide the sensor assembly through the housing sensor
entry and screw down the 33 mm screws until the limit is reached as the sensor
presses against the bottom of thermowell.
For wall or 2'' pipe mounting, the temperature sensor can be remote from the STT700
field mount housing or integral to the housing. For remote installations, the sensor
wiring should be run in shielded, twisted pair wiring and connected via one of the
housing wiring entries. For explosionproof/flameproof installations, ensure that the
cable entries are fitted with flameproof adaptors and that the wiring grade complies
with local standards.
For more details on wiring and dimensions for Aluminum Direct head and Cast iron
Direct head refer to STT700 SmartLine transmitter user’s manual, #34-TT-25-17.

July 2017 STT700 Quick Start Installation Guide 7
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 6.
Figure 6: STT700 HART Transmitter Operating Ranges
Figure 7: STT700 DE Transmitter Operating Ranges

8 STT700 Quick Start Installation Guide July 2017
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.Route the wires through
the pre-molded channels on the connector cap. Connect the loop power wiring shield
to earth ground only at the power supply end.
Note that loop-power for this transmitter is not polarity-sensitive.
Figure 8: STT 700 Terminal connections
This transmitter uses the two mounting screws to connect it to earth ground.
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 protection module is
available for use 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 the STT700 SmartLine Transmitter User’s
Manual 34-TT-25-17 for details
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 9. 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 (VXMTR) and maximum loop resistance (RLOOP MAX). Additional
consideration is required when selecting intrinsic safety barriers to ensure that they
will supply at least minimum transmitter voltage (VXMTR MIN), including the required
250 ohms of resistance (typically within the barriers) needed for digital
communications.

July 2017 STT700 Quick Start Installation Guide 9
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.
Grounding and Lightning Protection
Connect a wire from the mounting screws to earth ground to make the protection
effective. Use a size 8 AWG or (8.37mm2) bare or green covered wire for this
connection. For ungrounded thermocouple, mV, RTD or ohm inputs, connect the input
wiring shield(s) to the same earth ground connection. For grounded thermocouple
inputs, connect the internal ground connection shown in Figure 8 to the same earth
ground as used by the thermocouple. As noted above, the loop power wiring shield
should only be connected to earth ground at the power supply end.
For DE, the burnout direction needs to be selected in the hardware and this will be
detected at power on time.
Input Sensor Wiring
Connect the input sensors as shown in Figure 9 below: RTD Thermocouple, mV, Ohm
and Millivolt connections.
Figure 9: HART/DE Input Wiring Diagram for single sensor connection

10 STT700 Quick Start Installation Guide July 2017
The single sensor connections can also be used on a dual input transmitter when a
second input is not required. In this case, it is recommended that the second input be
configured to none in software.
In case of RTD type being configured to 4-wire, this is automatically done.
Figure 10: Wiring Diagram for HART Dual Sensor Connections
EXLOSION-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.