Safety and Information ���������������������������������������������������������������������5
Warnings�������������������������������������������������������������������������������������6
Hazardous Location Installation Requirements �������������������������8
Special Conditions for Safe Use �������������������������������������������������8
Cautions �������������������������������������������������������������������������������������8
Notes ������������������������������������������������������������������������������������������8
Information ����������������������������������������������������������������������������������9
Contacting Honeywell Analytics ��������������������������������������������������9
Revision History ��������������������������������������������������������������������������9
Local HART �����������������������������������������������������������������������16
Relays ���������������������������������������������������������������������������������16
Modbus ������������������������������������������������������������������������������17
FOUNDATION Fieldbus ������������������������������������������������������17
Accessories ������������������������������������������������������������������������17
The Front Panel ������������������������������������������������������������������������20
Controls and Navigation �����������������������������������������������������21
The General Status Screen ������������������������������������������������21
Entering the Menu ��������������������������������������������������������������22
Displaying Transmitter Information ��������������������������������������23
Main Menu ��������������������������������������������������������������������������������24
Menu Navigation �����������������������������������������������������������������������25
Installation and Operation ���������������������������������������������������������������29
Sensor Mounting and Location �������������������������������������������������30
Mounting the T ransmitter ����������������������������������������������������30
Wiring the Transmitter ���������������������������������������������������������32
General Wiring Considerations �������������������������������������������33
Local HART Interface ����������������������������������������������������������56
Point-to-Point Mode ������������������������������������������������������������56
Multidrop Mode �������������������������������������������������������������������57
Cable Length ����������������������������������������������������������������������58
Relays ���������������������������������������������������������������������������������58
Modbus ������������������������������������������������������������������������������59
FOUNDATION Fieldbus ������������������������������������������������������60
Powering the Transmitter the First Time ������������������������������61
IR Units Configured for Searchline Excel ���������������������������62
Remote Calibration of MPD Sensors ����������������������������������63
Configuring the Transmitter �������������������������������������������������������63
Configure Menu ��������������������������������������������������������������64
Select Language �������������������������������������������������������������64
Set Date and Time ���������������������������������������������������������65
Set mV Sensor Type �������������������������������������������������������66
Set mA Sensor Type �������������������������������������������������������67
Gas Selection �������������������������������������������������������������������67
Changing the Gas or Units Name ���������������������������������������69
Gas Selections and Alarm Limits Based on mV Sensor Type
Gas Calibration Menu���������������������������������������������������101
Zero and Span Calibration for EC/mV Sensors and
Searchpoint Optima ����������������������������������������������������������102
Using the Calibration Cup �������������������������������������������������105
Zero and Span Calibration of EC Sensors ������������������������105
Zero and Span Calibration for MPD Sensors ��������������������110
EC Sensor Operational Life ����������������������������������������������113
Functional Gas T esting (Bump T esting) ����������������������������113
Calibrate mA Output ���������������������������������������������������114
MPD Sensor Performance Data ���������������������������������������������154
Notes �������������������154
EN60079-29-1 Performance Approved Gases for mV Sensor
Types ��������������������������������������������������������������������������������������155
Notes �������������������155
Other Sensor Performance Data ��������������������������������������������155
Certifications by Part Number Series �������������������������������������156
Configuration Summary ����������������������������������������������������186
Information Screens ����������������������������������������������������������187
Event History ��������������������������������������������������������������������187
Test �����������������������������������������������������������������������������������187
Calibration �������������������������������������������������������������������������188
Configuration ��������������������������������������������������������������������188
Modbus and the XNX transmitter ��������������������������������������������192
Modbus Registers �������������������������������������������������������������������194
Index ���������������������������������������������������������������������������������������������200
Table of Contents
4
XNX Universal Transmitter
Safety and Information
Safety and Information
5
XNX Universal Transmitter
WARNING
!
Read and understand this manual before installing, operating, or
maintaining the transmitter. Pay particular attention to these warnings and
cautions. All of the warnings and cautions shown here are repeated in the
appropriate sections of the manual.
• Warnings identify hazardous or unsafe practices which could result in severe injury
or death.
Warnings
• Installation must be in accordance with the recognized standards of the
appropriate authority in the country concerned.
• Any work on the interior of the detector must be conducted only by Honeywelltrained personnel
• Before carrying out any work, ensure that local regulations and site procedures
are followed. Appropriate standards must be followed to maintain the overall
certification of the sensor.
• To reduce the risk of ignition in hazardous atmospheres, disconnect the equipment
from the supply circuit before opening the sensor enclosure. Keep the assembly
tightly closed during operation. Conduit runs must have a seal fitting connected
within 18 inches (45 cm) of the enclosure.
• Never open the XNX enclosure under power unless the area is known to be nonhazardous.
• Do not use the XNX Universal Transmitter in oxygen-enriched atmospheres. In
oxygen-enriched atmospheres, the electrical safety is not guaranteed.
• The sensor must be earthed/grounded for intrinsic safety, electrical safety and to
limit the effects of radio frequency interference. Earth/ground points are provided
inside and outside the unit. EMI note for applications using shielded cable: Cable
shield must provide 90% coverage of the wiring. Cable shield terminations must
be made at the cable glands with suitable EMI type glands. Avoid terminating
cable shields at the Earth ground lug inside the XNX enclosure. In cases where
wiring is in pipe, a shielded cable is not required. The external terminal is only a
supplemental bonding connection where local authorities permit or require such a
connection.
• Take care when handling EC sensor cells as they may contain corrosive solutions.
Do not tamper or in any way disassemble the sensor cells. Do not expose to
temperatures outside the recommended range. Do not expose the sensor to
organic solvents or flammable liquids.
• At the end of their working lives, sensors must be disposed of in an
environmentally safe manner, in accordance with local waste management
requirements and environmental legislation. Alternatively, sensors may be securely
packaged, clearly marked for environmental disposal, and returned to Honeywell
Analytics. Do NOT incinerate sensors as they may emit toxic fumes.
• High off-scale readings may indicate an explosive concentration of gas.
• Verify all outputs, including display, after installation, after service events, and
periodically to ensure the safety and integrity of the system.
• Do not use the transmitter in oxygen-enriched atmospheres. Concentrations
displayed will be adversely affected by oxygen depletion.
• After changing parameters with a handheld device, verify that the parameter
settings are correct at the transmitter.
• The factory-set passcodes must be reset to prevent unauthorized access to the
transmitter’s menus.
• When the transmitter is equipped with the optional Remote Mount Kit, the remote
sensor must be securely mounted in a fixed position. The Remote Sensor kit is not
intended to be used as a handheld sensor.
Safety and Information
6
XNX Universal Transmitter
• Enclosures of remotely mounted sensors contain aluminum. When installed in
Zone 1 locations, be careful to avoid ignition hazards due to impact or friction.
• Install the junction box according to local codes and manufacturer’s requirements.
• The enclosures of remotely mounted 705HT sensors contain aluminum. When
installed in Zone 1 locations, be careful to avoid ignition hazards due to impact or
friction.
• Power off the transmitter before changing S3 or S4. Failure to do this will
permanently damage the transmitter. Both switches must be set in either Source
or Sink prior to applying power.
• Do not set the minimum or maximum controller alarm levels at less than 10% or
greater than 90% of the full scale range of the sensor. CSA and FM agency limits
are 60% LEL or 0.6mg/m3.
• When configuring or communicating with the transmitter using the front panel
displays, resume monitoring by exiting all menus and returning to the General
Status menu manually. No time outs are invoked.
• When selecting a new target gas for units with a Searchpoint Optima Plus, the
sensor must be recalibrated.
• XNX Universal Transmitters carrying UL/CSA/FM approvals that are configured for
devices measuring %LEL will not allow adjustments to the full scale value. The
range is fixed at 100%.
• There is a potential loss of sensitivity during exposure to high concentrations
of H2S. Under these conditions, set the control unit to latch at overrange. In
standalone configuration, set alarms to latching. When resetting the overrange or
alarm, verify correct operation of the transmitter.
• Keep the passwords in a secure area to prevent unauthorized access to the
transmitter. If the passwords are lost, resetting the transmitter will require a
service technician.
• When the transmitter is placed in Inhibit Mode, alarms are silenced. This will
prevent an actual gas event from being reported. Inhibit Mode must be limited
to testing and maintenance only. Exit Inhibit Mode after testing or maintenance
activities.
• Honeywell recommends periodic bump tests (every 30 days or in accordance
with customer site procedures) to the sensor to insure proper operation and
compliance with the functional safety rating of the installation.
• Honeywell Analytics recommends bump testing of ClO2, Cl2, HF, and HCl sensors
frequently and in accordance with customer site procedures to ensure proper
operation and compliance with the functional safety rating of the installation.
• As some test gases are hazardous, exhaust the flow housing outlet to a safe area.
• Exposure to desensitizing or contaminating substances or concentrations causing
operation of any alarm may affect sensor sensitivity. Following such events, verify
sensor performance by performing a functional gas test (bump test).
• When servicing or replacing sensors, reduce the risk of ignition in hazardous
atmospheres by declassifying the area or disconnecting the equipment from the
supply circuit before opening the sensor enclosure. Keep the assembly tightly
closed during operation.
• Take appropriate precautions when using toxic, flammable, or pressurized
cylinders.
• XNX transmitter is SIL2 approved and please refer to XNX transmitter safety
manual (1998-0808) for the detail of SIL certificate.
ELECTROSTATIC DISCHARGE
To minimize the risk of electrostatic discharge:
• Ground the transmitter adequately
• Install the transmitter in a manner that will prevent accidental electrostatic
discharges, e.g. ensure that objects do not rub against the housing etc.
• Clean the enclosure with a damp cloth when necessary
Safety and Information
7
XNX Universal Transmitter
CAUTION
!
NOTE
Hazardous Location Installation Requirements
• Read and understand this manual prior to installation and use.
• Use only certified cable glands for installation.
• Shielded armored cable is required for CE compliance.
• To reduce the risk of ignition in hazardous atmospheres, conduit runs must have a
pour gland installed within 18 inches (45 cm) of the enclosure.
• All ¾ inch NPT conduit, stopping plugs, and adapters must be installed with 5¼
threads (minimum) engaged to maintain the explosion-proof rating.
• The XNX cover assembly must be fully seated to the enclosure (7 threads
minimum) to maintain the explosion-proof rating.
• Use only the supplied stopping plugs (Honeywell part number 1226-0258) with the
XNX Universal Transmitter.
• For units fitted with the optional relay module: relay contact ratings are 250 VAC
5A, 24 VDC 5A resistive loads only.
• Use copper conductors only. Tighten terminal block screws to 4.5 lb/in (max).
• For XNX-UT**-***** transmitters, refer to XNX control drawing 1226E0402.
Special Conditions for Safe Use
• The following applies to the HART Barrier intrinsically safe circuits: For installations
in which both the Ci and Li of the intrinsically safe apparatus exceed 1% of the Co
and Lo parameters of the associated apparatus (excluding the cable), then 50% of
Co and Lo parameters are applicable and shall not be exceeded, i.e., the Ci of the
device plus the C of the cable must be less than or equal to 50% of the Co of the
associated apparatus, and the Li of the device plus the L of the cable must be less
than or equal to 50% of the Lo of the associated apparatus.
• For circuits connected to the EC barrier in which the capacitance and inductance
exceed 1% of the permitted values, the maximum permitted capacitance is limited
to 600 nF for group IIC and 1uF for group IIIC.
• The connection to the HART circuit shall be rated a minimum of IP 6X.
• Delays resulting from transmission errors between sensor and transmitter extend
response times T90 by more than one-third. The period until fault indication is 10
seconds.
• The HART interface is subject of this EC-type examination certificate only for the
purpose of configuration and maintenance. The options “Modbus interface” and
“FOUNDATION Fieldbus interface” are not subject of this EC-type examination
certificate.
• Long-term exposure (>20 minutes) to concentrations exceeding the full-scale
range of the H
value may then decrease even though high levels of toxic gas are still present. If
such conditions can occur, set the control unit to latch at overrange. In standalone
operation, set alarms to latching. When resetting the overrange or alarm, verify the
correct operation of the transmitter. Before re-calibrating the transmitter, verify the
absence of gas.
• The flameproof joints are not intended to be repaired.
S sensor Type 2 can cause it to lose sensitivity. The measured
2
Cautions
Caution messages address situaltions that could result in damage to the
transmitter or sensors.
Notes
!
Notes relate helpful information.
Waste Electrical and Electronic Equipment (WEEE) Directive
This symbol indicates that the product must NOT be disposed of as general
industrial or domestic waste. This product should be disposed of through
suitable WEEE disposal facilities. For more information about disposal of this
product, contact your local authority, distributor or the manufacturer.
Safety and Information
8
XNX Universal Transmitter
Information
Honeywell Analytics assumes no responsibility for equipment that is not
installed and used following the procedures in the Technical Manual.
Ensure that the appropriate equipment has been installed. If in doubt,
contact Honeywell Analytics.
Honeywell Analytics assumes no responsibility for errors or omissions in
this document or the consequences of those errors or omissions. Contact
Honeywell Analytics with corrections. Honeywell Analytics reserves the
right to revise this document without notice. Contact the local distributor or
Honeywell Analytics if additional information is needed.
XNX® is a registered trademark of Honeywell International.
TM
Reex
is a trademark of Honeywell International.
HART® is a registered trademark of the HART Communication
Foundation.
Modbus® is a registered trademark of Schneider Automation Inc.
FOUNDATIONTM is a trademark of Fieldbus Foundation.
Unistrut® is a registered trademark of Unistrut Corporation.
Windows® is a registered trademark of Microsoft Corporation.
Life Safety Distribution GmbH
Javastrasse 2
8604 Hegnau
Switzerland
Tel: +41 (0)44 943 4300
Fax: +41 (0)44 943 4398
India Tel: +91 124 4752700
gasdetection@honeywell.com
Americas
Honeywell Analytics Inc.
405 Barclay Blvd.
Lincolnshire, IL 60069
USA
Tel: +1 847 955 8200
Toll free: +1 800 538 0363
Fax: +1 847 955 8210
detectgas@honeywell.com
Asia Pacific
Honeywell Analytics Asia Pacific
7F SangAm IT Tower, 434 Worldcup Buk-ro,
Mapo-gu, Seoul 03922
Korea
Tel: +82-2-69090300
Fax: +82-2-69090328
analytics.ap@honeywell.com
The transmitter is a comprehensive gas detection system
designed to operate in hazardous locations
sensor technologies –catalytic bead, electrochemical (EC),
or infrared (IR)– to detect toxic gases, ammable gases, and
oxygen depletion gas hazards. Each technology has a dedicated
personality board.
Catalytic bead technology is used with the mV personality
board. Catalytic bead sensors respond to a wide variety of
combustibles so are typically used for ammable gas detection.
Electrochemical technology is used with the electrochemical
board. EC sensors measure toxic gases in low concentrations.
The EC sensors employ the patented Reex™ cell fault
diagnosis routine. Reex checks for cell presence, cell dry-out,
and cell open or short circuit. Reex is automatically initiated
by the transmitter at eight-hour intervals. It is also initiated on
power up or sensor exchange. In the event of a cell failing this
test, a sensor fault code is displayed. Reex diagnostics occur in
the rst minutes of the power up sequence.
Infrared technology is used with the IR board. IR sensors
optically absorb gases that fall into the infrared spectrum.
For additional information about any of these sensor types, refer
to the applicable data sheet for the supported sensor in Figure 1.
The transmitter also allows for an optional communication
board. There are three types of boards: relay, Modbus
1
There are three main types of gas hazards: ammable, toxic, and asphyxiant. A am-
mable gas hazard is one in which there is a risk of re and/or explosion (e.g., a situation
in which a gas such as methane, butane, or propane is present). A toxic gas hazard is
one in which there is a risk of poisoning (e.g., a gas such as carbon monoxide, hydrogen
sulde, or chlorine is present). An asphyxiant hazard would include a risk of suffocation
through oxygen deciency. (Oxygen can be consumed or displaced by another gas.)
Introduction
1
and utilize multiple
®
, or
FOUNDATIONTM Fieldbus. See the Communications section for
additional information.
XNX Universal Transmitter
Searchline Excel
Searchpoint Optima Plus
705
705HT
CI
H
2
CIO
CO
F
2
Personality Sensor Type Supported Sensors
rsonality Senso
NH
2
NO
H2S
2
NO
HF
EtO
HCN
HCI
O
3
2
PH
3
SO
2
2
O
3
Su
Sensepoint
Sensepoint HT
ted Sens
Multi-Purpose
Detector (MPD)
Catalytic Bead
Infrared Flammable
Infrared Methane/CO
IRPoint and Open-Path Infrared Searchpoint Optima Plus, Searchline Excel
mVFlammable and Toxic
XNX ECToxic and O
Sensing
2
705, 705HT, Sensepoint, Sensepoint HT, MPD
(Catalytic Bead Flammable, IR Flammable and IR CO
Electrochemical sensors, with Hot Swap, pre-calibrated
through Intrinsically Safe (IS) barrier
.
Figure 1. XNX Universal Transmitter and supported sensing technologies
The transmitter relies on 4-20mA output, refreshed at least every
two seconds (once per second is typical), in which the output is
proportional to the gas concentration.
11
2
)
2
XNX Universal Transmitter
20 mA/HART Output
All XNX Transmitters provide a 20mA Current Loop with HART
Communication which can be user congured for Sink, Source
(3-Wire) or Isolated (4-Wire) electrical interface based on
installation requirements.
The 20mA current loop output provides an analog indication of
special states, a proportional output to gas concentration and
overrange indication as shown in the table below. In the event of
a simultaneous alarm and fault, an alarm condition will always
override fault or warning state.
OutputDescription*Notes
1.0 mAFault
Warm-up
2.0 mA
3.0 mAWarning
4-20 mAGas Concentration
21 mAOverrange
*Alarm conditions always take priority over faults and warnings.
Inhibit
Bump Test
Calibration
Special
State
Indication
HART Protocol provides communications with the transmitter
from a remote control system for Conguration, Status, and
Diagnostics. (See the HART Protocol section for additional
information)
Communications
The XNX® Universal Transmitter is registered with the HART®
Communication Foundation. The transmitter
features HART over 4-20mA as standard.
Introduction
Additional optional communication interfaces are available:
relay communication, Modbus, or FOUNDATION Fieldbus.
Each communication option has a dedicated option board. For
additional information, refer to the Options section.
Certifications
XNX-UT**-****** Versions are UL and CSA listed for installation in
Class I, Division 1, Groups A, B, C and D Hazardous Locations.
FM Approvals evaluation includes Class I, Zone 1, Group IIC,
as well as performance tests for specic sensor/transmitter
combinations. The CSA or FM certication does not cover daisychained XNX combustible gas transmitters, the use of HART,
Modbus, or FOUNDATION Fieldbus protocols for combustible
gas performance. HART, Modbus, or FOUNDATION Fieldbus
protocols can be used only for data collection or record keeping
with regards to combustible gas. The EC cartridge
remote mount kit are UL classied to Canandian and US
standards.
XNX-AM **-***** versions are certied to comply with the
European Community ATEX Directive and the prescribed
protection methods for installation in potentially explosive
atmospheres.
XNX-BT**-***** versions are UL listed and INMETRO approved for
compliance with both U.S. and Brazilian standards.
See the Sensor Datasection for additional information on
applicable approvals by part number and the Operating and
Storage Conditions for Performance Tested EC Sensors section
for marking.
2
“Cartridge” and “sensor” are used interchangeably in this document.
12
2
and EC
XNX Universal Transmitter
Patents
Patents Applicable to the XNX Universal Transmitter
Patent
Number
6,123,818Reflex patentImplemented in XNX
6,251,232Reflex patentImplemented in XNX
6,351,982Flammable sensor housingXNX accepts this sensor
6,395,230PellistorSensor used in XNX
7,225,661Gas calibration adapterApplicable to XNX
7,716,962Method of gas calibrationUsed to calibrate XNX ECC cartridges
DescriptionApplication
Glossary
TermDescription
bump test
ferrite beada device that suppresses noise in a circuit
FOUNDATION Fieldbus
HART Protocol
intrinsic safety
IP rating
latching alarman alarm that, once activated, must be manually reset
magnetic wanda small device used to change the transmitter’s settings
Modbusa digital communications protocol based on RS-485 topology
non-latching alarm
pellistor/beadan electronic device used to detect combustible gases
personality board
POD
span calibration
sticky gasesgases that tend to coat the surfaces they contact
toxic gases
zero calibration
a brief exposure to a gas to verify that a detector is working;
also known as a functional test
an open architecture, digital, serial communication system
administered by the Fieldbus Foundation
Highway Addressable Remote Transducer Protocol; a bidirectional analog communication system developed by the
HART Communication Foundation
design parameters for the safe operation of electrical equipment in hazardous environments; commonly abbreviated IS
Ingress Protection; a system for describing a device’s protection against dry materials and liquids (e.g., IP66/67)
an alarm that automatically resets when the cause of the
alarm is removed
a component of the transmitter that allows its operation to
focus on different sensing technologies
Personality, Options, and Display; the group of components
including an XNX transmitter’s personality board, display, communication board, etc.
adjustment of a detector so that its scale corresponds to a gas
concentration range from 0% to 100%
gases that are poisonous to humans (refer to the gas’s Safety
Data Sheet for details)
adjustment of a detector so that its zero reading corresponds
to a test gas concentration of 0%
Introduction
13
XNX Universal Transmitter
CAUTION
!
Product Overview
The transmitter is comprised of these main parts:
Figure 2. XNX exploded view
Enclosure
Available in either Stainless Steel or Aluminum, with 3/4” NPT
(UL/CSA or UL/ INMETRO) or M25 (ATEX/IECEx only) threaded
cable/conduit ports, the transmitter enclosure is explosionproof and suitable for use in -40°F to +149°F (-40°C to +65°C)
operating conditions. A 5-coat marine nishing process provides
the highest degree of corrosion protection. For more information
on performance specications, see the Specications section.
The enclosure is equipped with up to ve threaded cable/conduit
ports providing functional and exible congurations based on
sensor and option choices. See Cable/conduit port assingments
for port assignments and restrictions.
Stopping plugs (PN# 1226-0257 or 1226-0258) have been
provided to seal unused cable/conduit ports and have been
Agency evaluated/approved for use with the XNX enclosure only.
The number of stopping plugs varies among available
congurations.
Caution: The stopping plugs are for use only with the XNX transmitter. Do not use them
with any other device.
Mounting lugs integral to the enclosure allow easy installation
on a at surface or 2”-6” (50-150 mm) diameter pipe with the
optional Pipe Mount Kit or to ceilings with the Ceiling Mount
Bracket Kit.
Introduction
14
XNX Universal Transmitter
Cover Lock Screw, requires a
2mm hex key (included)
Tempered Glass Window
Cover
NOTE
Cover
The transmitter cover is supplied in the identical material
specied for the enclosure.
Figure 3. XNX cover components
A tempered glass window requires the use of the supplied magnetic
wand/screwdriver to activate the four user interface switches
located on the front of the display module. This allows for non-
intrusive setup and operation.
A locking screw integrated into the cover provides positive
locking that can be loosened by using the supplied 2mm hex
key.
Figure 4. Magnetic wand/screwdriver
POD
The POD (Personality, Options, and Display) includes circuit
boards for the personality module, optional interfaces, and
display.
The personality module, or circuit board, determines the
transmitter behavior based on the sensor type attached to
the transmitter (electrochemical cell, catalytic bead sensor, or
infrared) and provides the necessary interface. Connection to the
attached sensor is made through the sensor connector.
The optional communication boards vary depending on the
option selected when ordered. Only one of the three available
interface options (relays, Modbus, or FOUNDATION Fieldbus)
can be attached to the transmitter.
!
Note: When attaching the cover or stopping plugs, coat the threads with a suitable antiseize compound to prevent corrosion.
Introduction
Figure 5. POD, exploded view
15
XNX Universal Transmitter
NOTE
Options
Local HART
Available with any sensor technology or personality, an external
access to the HART interface in the transmitter is provided.
An intrinsically safe (IS) barrier inside the transmitter gives
the user full control using a handheld eld communicator
for programming and conguration. The external interface is
installed in the lower left cable/conduit port of the transmitter
and is intrinsically safe. For more information, see the HART
Protocol section.
Figure 6. XNX Universal Transmitter with HART interface IS barrier
!
Note: POD options are either relay, Modbus, or FOUNDATION Fieldbus.
Relays
The relay option (XNX-Relay) provides 3 form “C” (SPDT)
normally open/normally closed (NO/NC) contacts for alarm and
fault indication. A remote reset input (TB4) is provided to silence
alarms. Momentarily closing the the circuit between the pins of
TB4 performs the same function as the Reset Alarms & Faults
command.
The remote reset switch (designated TB-4 and labeled “Remote
Reset SW”) is located on the relay option board. It provides
a remote hardware-based reset of faults and alarms to the
transmitter. In the event that direct access to the local and
®
HART
transmitter may be reset remotely using a momentary switch.
This will momentarily close the circuit between the two pins of
TB4, providing the same functionality as a Reset Alarms & Faults
command performed from the main screen of thelocal user or the
HART interfaces.
Relays are not available when the Modbus
Fieldbus options are installed.
The transmitter has three relays: relay 1 is for alarm level 1, relay 2
is for alarm level 2, and relay 3 is for faults and special states. Two
alarm levels can be set, allowing, for example, a level 1 alarm for
the immediate area when a certain gas concentration is detected
and a plant-wide level 2 alarm when a greater gas concentration is
detected.
The maximum refresh rate of the relays is 2 seconds. See the Set
Alarm Values section for more information.
interfaces is not possible, alarms and faults from an XNX
®
or FOUNDATION
Introduction
16
XNX Universal Transmitter
NOTE
Modbus
The optional Modbus interface allows the transmitter to connect
to a bus of devices and transmit data to PLCs or controllers.
(For more information, see the Modbus
Connections to the transmitter are made through a pluggable
terminal block on the Modbus interface circuit board. Modbus
RTU protocol uses ASCII/Hex protocols for communication.
Protocol Manual).
FOUNDATION Fieldbus
FOUNDATION eldbus is a digital communication system which
supports several types of messages. Unlike many traditional
systems which require a set of wires for each device, multiple
FOUNDATION eldbus devices can be connected with a
single set of wires. FOUNDATION eldbus overcomes some
of the disadvantages of proprietary networks by providing a
standardized network for connecting systems and devices.
!
Note: FOUNDATION Fieldbus XNX transmitters require a separate power source and
cannot be powered via the bus.
Accessories
Refer to the Accessories/Spares section for part numbers.
Pipe Mount Kit
The pipe mount kit allows the transmitter to be mounted to pipe
from 2”-6” (50-150 mm) in diameter. The kit includes the pipe
mount bracket, two carriage bolts, nuts, and lock washers.
Calibration Gas Flow Adaptor
The calibration gas ow adaptor is used to apply calibration test
gas to the sensor. It attaches to the bottom of the sensor and
can be tted without removing the standard weatherproof cover.
See the Calibration section for details on gas calibration.
Introduction
17
XNX Universal Transmitter
Weatherproof Cover
The weatherproof cap protects sensors from harsh weather.
Remote Sensor Mounting Kit for EC Sensors
The remote sensor mounting kit allows EC sensors to be
remotely mounted via an IS cable kit, available in various
lengths. The kit includes shielded cable, cable glands, and
remote terminal box. The cable can be cut to the required length
then terminated at the remote terminal box.
Ceiling Mount Bracket Kit
The optional ceiling mount bracket kit includes
two stainless steel ceiling mount brackets, bolts,
and nuts.
Remote Gassing Kit
The remote gassing kit enables gas
to be applied remotely for
performing functional response
checks (bump tests). The kit
Includes: 50’ Teon® tubing, a
mounting bracket, a tube cap, and
device adapters in 1/4” and 1/8”
(6.3 mm and 3.2 mm) ID to attach to
bump test ports on the
weatherproof cap of the device.
Collecting Cone
The collecting cone improves detection of lighter-than-air gases
such as hydrogen and methane.
Introduction
Extreme Weather Protector
The extreme weather protector protects the sensor from
environmental conditions in outdoor exposure applications.
18
XNX Universal Transmitter
Duct Mount Kit
The duct mount kit can be used with the EC sensor to detect O
CO, H
, and H2S gases in ducts. When combined with the MPD
2
Interface Adapter (available separately), the duct mount kit can
accommodate the MPD to detect ammable gases in ducts.
The duct mount kit includes the adapter, gasket, and required
fasteners. For MPD applications, order both the Duct Mount Kit
and the MPD Interface Adapter.
1226A0382 MPD Adapter Ring
S3KDMK EC/MPD Duct Adapter Kit
Sunshade
The sunshade is used in environments with high heat and/
or direct sunlight. It protects the sensor from environmental
conditions in outdoor applications, helping to keep the internal
components within the specied temperature ranges. The
sunshade can be mounted to 2-inch pipe or to a wall with
suitable 6mm fasteners.
,
2
Introduction
19
XNX Universal Transmitter
Move Right/Increase ValueMov e Left/Decrease Value
Fault LED (yellow)
The Front Panel
The transmitter uses magnetic switches to enable non-intrusive
operation. To activate a magnetic switch, hold the magnetic end
of the screwdriver up to the glass window and slowly swipe the
magnet directly over the switch area. For best results, hold the
screwdriver as illustrated in Figure 7.
Switch Actuation
Enter/Accept
Visual Indicator
Escape/Back
In some menus where displayed values can be changed, the
magnet must be swiped over the switch to cause the numeral
on the display to advance through the available values. Use the
✖
switch to return to a previous menu or eld.
For the purposes of this manual, the instruction to use
✓, ✖
, or , means to activate the relevant magnetic switch as
described above.
Power LED (green)
Alarm LED (red)
Escape
Move Left
Decement Value
Figure 8. Front panel display of the transmitter
Enter/Accept
Switch Actuation
Visual Indicator
Move Right
Increment Value
Figure 7. Using the magnetic wand
A visual indication of the switch actuation will appear in
the lower right corner of the display each time the switch is
activated.
Introduction
20
XNX Universal Transmitter
Current Concentration Level
Alarm 1 Set Point
Current Concentration Le
Warning Code
Warning Icon
Controls and Navigation
CommandDescription
✓
Enter/Accept
✖
Escape/Back
Move Left/
Decrease Value
Move Right/
Increase Value
The Enter/Accept switch is used to access menus,
accept changes and to answer “yes” to system
prompts.
The Escape/Back switch is used to return to previous
menus or to answer “no” to system prompts.
The Left/Decrement arrow is used to move through
menu options or decrease values when entering text or
numbers.
The Right/Increment arrow is used to move through
menu options or increase values when entering text or
numbers.
The General Status Screen
\
Figure 9. General Status screen
The General Status screen shows the status of the transmitter.
Warnings, faults, alarm levels, and current concentration levels
are displayed continuously.
3
(Numeric)
Status Indicator
vel
(Bar Graph)
Figure 10. General Status screen, normal operating mode
Concentration Units
Full Scale
Alarm 2 Set Point
The Normal Operating Mode icon indicates proper operation.
The display also shows the concentration level of the target gas
in two ways. In the rst, a numeric value is shown in the upper
right corner of the display in the units selected (ppm, %LEL,
%VOL). The second concentration display is shown in the form
of a bar graph representing the current concentration against
full scale and in relation to the dened alarm levels. For more
information on setting range and alarm levels, see the Range/
Alarm Settings section. See the EC Sensor Performance Data,
Factory Mutual Veried, EC Performance Data, DEKRA EXAM
Veried and the Other EC Sensors sections for negative drift and
zero deviation values.
When a warning is triggered, the warning icon
appears and
information is displayed on the General Status Screen. The
information displayed alternates between screens displaying the
gas concentration and the warning code. See the Warnings and
Faults section for more warning code information.
3
The LCD screen’s refresh rates are 500 milliseconds when the LCD heater is off and 1 second
with the heater on.
Introduction
Figure 11. General Status Warning detail
21
XNX Universal Transmitter
Concentration
Alar
Alarm Level Triggered
Alarm Level Triggered
m Setpoints Flash
NOTE
If the fault icon is displayed, a fault condition has been
triggered and the display will alternate between the target gas
concentration and the fault code. See the Warnings and Faults
section for more fault code information.
Fault Icon
Figure 12. General Status Fault detail
Fault Code
In the event of multiple warnings or faults, the user can view all
messages with the transmitter’s Event History function.
When an Alarm icon
is displayed, the target gas
concentration exceeds one or both preset alarm levels. The
General Status Screen displays the gas concentration and the
alarm level exceeded.
m Icon
Target Gas
Figure 14. General Status Overrange detail
Negative values are not displayed and do not appear on the
4-20 mA output, but they are indicated by faults or warnings
when preset thresholds are exceeded. (See zero deviation in the
Specications section)
In addition to the graphic alarm, fault, and warning indicators,
the LEDs on the front panel ash in these patterns based on the
condition:
Condition
Alarm 1Solid
Alarm 2Flashing
WarningSolid
FaultFlashing
HealthFlashing
1
The refresh rate of the LEDs is 0.5 second.
2
Special states (Warmup, Inhibit) are not indicated by the Fault LED.
RedGreenYellow
LED1
2
Entering the Menu
Swiping the magnet over the magnetic switch ✓ or ✖ allows the
user to reset faults or alarms, display current settings, or make
adjustments to the device.
Figure 13. General Status Alarm detail
In an overrange condition, the alarm icon will display and the target
gas concentration bar graph and alarm setpoints will ash.
Full Scale
Concentration
Concentration Bar, Alar
Introduction
!
Note: If the Easy Reset option is set to Lock, alarms and faults cannot be reset
without logging in or entering a passcode. For more information, see the Configure
Security section.
Swiping the ✖ or “escape” magnetic switch activates the Alarm
Reset screen and allows alarms to be silenced and faults to be
reset.
22
XNX Universal Transmitter
WARNING
!
The ✓ switch resets all alarms and faults and returns to the
General Status screen. Use the
Status screen without resetting the alarms and faults.
Figure 15. Alarm Reset screen
Two authorization levels control access based upon the security
level of the user: Level 1 (routine maintenance) and Level 2
(technician and password administrator). The default passcodes
for both levels are “0000” and must be changed after installation
to control access (see the Configure Securitysection). In
general, access to neither security level restricts the user to
viewing the transmitter’s display. If desired, the Easy Reset from
Main Status option
access to either security level.
allows alarm and fault resets without requiring
Figure 16. Passcode screen
✖
switch to return to the General
When the Passcode screen is displayed, the rst passcode digit
is highlighted. Use the
through the values. Once the correct value is displayed for the
rst digit,
moves to the previous digit of the passcode.
Repeat for each of the remaining digits in the passcode. If the
passcode is entered incorrectly, the Invalid Passcode screen is
displayed and the user is returned to the General Status screen.
✓
accepts the value and moves to the next digit or ✖
✓
switches to increase or decrease
Figure 17. Entering the passcode
Figure 18. Invalid Passcode screen
Displaying Transmitter Information
While in the General Status display, swipe the magnet over the
magnetic switch
The General Status display will replace the bar graph in the
lower portion of the screen with the unit’s serial number, the
date and time, and the unit’s part number.
to display information about the transmitter.
Warning: The factory-set passcodes must be reset to prevent unauthorized access to
the transmitter’s menus.
Introduction
23
XNX Universal Transmitter
?
Figure 19. General Status Screen with unit information
Main Menu
Once the proper passcode has been entered, the transmitter
displays the Main Menu.
Figure 20. The Main Menu
From the Main Menu, a Level 1 user can:
• display the current settings/conguration
• test the transmitter
• calibrate and bump test the transmitter
• congure the unit for language, date and time
The Main Menu consists of these options:
Introduction
24
MenuDescription
Configure
Test
Information
Gas
Calibration
Provides access to settings to configure the
transmitter and connected devices
Provides access to tools and settings to allow
simulation of gas events to test the system
Displays current settings for the transmitter
including optional relays and Modbus
Displays the interface to calibrate sensors
attached directly to the transmitter
See
Section...
Configuring
the
Transmitter
Tes t Menu
Information
Menu
Gas
Calibration
Menu
XNX Universal Transmitter
Menu Navigation
Introduction
25
XNX Universal Transmitter
Information Mode
Alarm/Fault Status
Alarm/Fault
Conrm Alarm/Fault Reset
Reset Alarm/Fault
Date & Time
Transmitter ID, Serial #, Revision
Transmitter Data
Transmitter Status
Transmitter Status
Sensor Type, Serial #, Revision
Sensor Data
Sensor Status
Sensor Status
Gas Name, ID, Range
Gas Data
Range Settings, Alarm Settings
Range/Alarm Settings
mA Level Settings
mA Level Settings
Relay Settings
4
Relay Settings
Fieldbus Settings
5
Fieldbus Settings
Event History
Increment Next/Previous Event
Increment Next/Previous Hour
Increment Next/Previous Day
Increment Next/Previous Alarm
Increment Next Previous Fault
Enter Span Gas Concentration (Oxygen)
Enter Span Gas Concentration (Not Oxygen)
Bump Test
mA Output Calibration
Adjust 4 mA Output
Adjust 20 mA Output
Soft Reset
Align Excel
7
8
6 Optional relay only
Introduction
7 Searchpoint Optima and Searchline Excel only
8 Searchline Excel only
27
XNX Universal Transmitter
Conguration Mode
Select Language
Set Date & Time
Set Date Format
Set Year, Month, Day
Set Hours, Minutes, Seconds
Sensor Type Selection
Set mV Sensor Type
Set mA Sensor Type
Gas Selection
Changing the Gas or Units Name
Gas Selections and Alarm Limits Based on mV
Sensor Type
Range & Alarms
Set Range
Alarm 1 Type
Alarm 1 Setpoint
Alarm 1 Latching or Non-latching
Alarm 2 Type
Alarm 2 Setpoint
Alarm 2 Latching or Non-latching
Selecting the Numeric Format
Latching/Non-latching
Change Meas. Units
mA Output Levels
Change mA for Inhibit
9 Catalytic bead sensor only
10 Searchpoint Optima and Searchline Excel only
11 ECC and mV only
Introduction
9
10
11
Change mA for Warning
Change mA for Overrange
Change mA for Low Signal
Change mA for Blocked Beam
Set Calibration Interval
Accept New Sensor Type
Information screen identifying previous sensor and
new sensor
Screen displays new type and old type
Set Beam Block
13
Select Beam Block Threshold
Select Time to Beam Block
Select Time to Fault
Set Path Length
14
Set New Path Length
Congure Unit ID
Edit ID
Clear ID
Default ID
Relay Options
15
Select A1
Select A2
Fieldbus Options
16
Change Fieldbus Address
Change Fieldbus Speed
Security
Reset and LVL1
LVL1 Code
LVL2 Code
12 Electrochemical and catalytic bead sensors only
13 Searchline Excel only
14 Searchline Excel only
15 Optional relay only
16 Optional FOUNDATION Fieldbus and Modbus only
28
12
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