Honeywell XNX Specifications
XNX Universal Transmitter
A universal transmitter
compatible with all
Honeywell Analytics gas
sensor technologies
XNX Universal Transmitter
Flexible
• Compatible with all Honeywell Analytics
gas sensors
• Allows selection of best sensor
technology for each application
• Choice of all industry standard output signals
• Ability to adapt configuration as site
needs change
• Future-proofed for any new output standards
Common Transmitter Platform
• Simplified and reduced cost of installation
• Reduced training time and cost
• Less chance of misinterpreting messages
• Less chance of incorrectly changing settings
• Reduced maintenance, spares, stock
and cost
Global Approvals
• European, US and Canadian
• Compliant with ATEX, UL and CSA standards
• ATEX, UL and CSA performance approval
• IEC61508 SIL 2
Easy to Use
• Easy read multilingual backlit LCD with text,
bar graph, digits and icons
• Local or remote sensor mounting options
• Selectable sink, source or isolated
4-20mA output to suit preferred
wiring topology
• HART® communications as standard for
remote diagnostics/configuration
Reduced Operational Costs
• Fully configurable via non-intrusive
magnetic switches
• No hot work permit needed
• Hot swap toxic and Oxygen sensor cartridges
• Serviceable catalytic and IR sensors
• Auto-inhibit during maintenance
Friendly Installation
• Integral surface mounting lugs or optional
pipe or ceiling mounting brackets
• 5 x M25 or ¾” NPT cable/conduit/sensor
entries
• Plug-in ‘POD’ module removes to give access
to terminal area
• Removable plug/socket type terminal blocks
for ease of wiring
Typical Applications
• Offshore oil and production platforms
• Oil and gas exploration and drilling
• Refineries
• Chemical and petrochemical plants
• Onshore oil and gas terminals
• Gas transmission
• Power stations
XNX is an extremely flexible transmitter
that can be configured to accept an input
from any of the Honeywell Analytics range
of gas sensor technologies. It can also
be configured to provide a wide variety
of industry standard output signals.
This enables users to have a single type
of interface to all their gas detection needs,
even when different types of detectors are
employed, to most effectively address the
different gas detection applications on site.
The most effective gas detection systems often
employ a variety of detection technologies
including point flammable detectors (both
catalytic and infrared type), toxic and Oxygen
electrochemical cell type detectors and open
path infrared detectors. XNX provides a
common transmitter interface to all of these
and can be configured to provide industry
standard signal outputs to match the individual
requirement of each application or the preferred
site standard. If site output standards change,
XNX can be reconfigured to provide the new
required output. XNX has also been futureproofed by having the ability to have other
output modules fitted as new output standards
are developed and adopted by industry.
Having a common transmitter platform for
all your gas detectors brings further benefits.
Common tools and installation methods
simplifies and reduces cost of installation.
The common user interface makes operation
faster to learn and easier to navigate, thus
reducing time needed for training as well as
reducing the chance of incorrectly interpreting
messages or incorrectly changing settings.
Common spare parts also mean reduced
maintenance spares stock levels and cost for
all detectors.
XNX allows you to apply the most appropriate
gas detection technologies for each application,
standardise the interface to those detectors and
has the flexibility to provide the required signal
outputs. With XNX the answer is always yes.
XNX Universal Transmitter
Inputs
HT
IR Point
EC
IR Open Path
XNX
Outputs
Foundation Fieldbus™
HART
Modbus
4-20mA
Relays
®
mV
X
XNX Transmitter
XNX has Worldwide hazardous area and
performance approvals and is housed in
a flameproof enclosure that is available in
either painted marine grade aluminum alloy
or stainless steel 316 versions. A large backlit
multilingual LCD clearly indicates the unit’s
status using a combination of text, digits and
icons. Users can modify its operation using
the LCD and magnet switches without ever
needing to open the unit. An optional local
IS HART® terminal port is also available.
Both enable one man, non-intrusive, operation
and reduce routine maintenance time and
costs. Local LEDs are also provided to indicate
the unit’s status at a glance.
N X
XNX Transmitter Sensor Compatibility
XNX is compatible with all of the
Honeywell Analytics range of industrial fixed
gas sensors including Searchline Excel,
Searchpoint Optima Plus, Sensepoint (HT and
PPM) and Model 705. For further information
on these sensors, please refer to their individual
datasheets.
XNX with Searchpoint Optima Plus
The Multi Purpose Detector (MPD) is a
serviceable stainless steel sensor housing with
plug-in catalytic and infrared sensor cartridges.
The catalytic sensors measure flammable
gases in the range 0-100%LEL and the
infrared sensors measure Hydrocarbons in the
range 0-100%LEL, or Methane 0-100%LEL
(or 0-5%Vol) and CO2 0-5%Vol. See the
specifications section for full details of the
MPD sensor.
The XNX EC sensor is also a serviceable
stainless steel sensor with a wide range of toxic
and Oxygen plug-in sensor cartridges. The XNX
EC sensor interface to the XNX transmitter is
intrinsically safe, allowing the sensors to be
‘hot swapped’ without the need for a hot work
permit. This reduces the cost of ownership
by reducing the cost and time to service
the detector.
XNX MPD Sensor
XNX EC Sensor
XNX Universal Transmitter
XNX Transmitter
Configuration
XNX has three basic personalities
(configurations) which support different
types of sensor. The personality boards and
optional output interfaces are enclosed in
the electronics POD (Personality, Options
and Display). The POD determines the
XNX transmitter behaviour based on the
sensor type attached to it and the selected
output options.
The mV (millivolt) personality is used for all
mV signal input sensors including MPD,
Sensepoint HT, PPM and the Model 705.
The EC (Electrochemical cell) personality is
for use with the XNX EC toxic and Oxygen
sensors. The IR (infrared) personality is for
use with the Searchline Excel open path and
Searchpoint Optima Plus point infrared gas
detectors.
The table below shows the three basic XNX
transmitter configurations and the sensors
each supports.
XNX Transmitter Main Components
POD - Personality, Options
and Display module
Cover
Intrinsically Safe
(IS) barrier for
Optional Local
®
Interface
HART
Optional Local IS
HART® input port
location (if fitted)
Enclosure
Intrinsically Safe (IS) barrier for
electrochemical sensor interface
(when equipped)
Mounting lugs (x2)
M25 or ¾”NPT
entries (x5)
Personality XNX mV XNX EC XNX IR
Sensors
Supported
Product
Image
MPD
Flammable
Catalytic
MPD
Flammable
Infrared
(Flam
and CO2)
Sensepoint HT
(High
Temperature)
Sensepoint
PPM
Model 705 HT
(High
Temperature)
XNX Toxic
and Oxygen
Sensors
Searchpoint
Optima Plus
Mechanical Installation Options
Searchline Excel
Vertical or Horizontal Pipe Mounted
(Using Optional Pipe Mounting Bracket)
Note: Other sensor accessories available dependent on sensor type. Contact Honeywell Analytics for further details.
Ceiling Mount
Surface Mounted Duct Mounted Optional remote sensor
mounting kit for XNX EC
sensor
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