Honeywell XNX SENSOR

IR Devices Generic 20mA Input mV Devices XNX Electrochemical Sensors EC Searchpoint Optima Plus Searchline Excel 705 705HT Sensepoint Sensepoint HT XNX Universal Transmitter Personality

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Introduction i

Safety

Ensure that this Operating Manual is read and understood

Pay particular attention to

the overall certification of the detector.

To reduce risk of ignition of hazardous atmospheres, conduit runs must have a seal fitting connected within 18 inches (45 cm) of the

»

enclosure.

To reduce the risk of ignition of hazardous atmosphere, de-classify the area or disconnect the equipment from the supply circuit before opening

»

the detector enclosure Keep assembly tightly closed during operation.

Never open the XNX enclosure under power unless the area is known to be non hazardous.

management requirements and environmental legislation.

Alternatively, sensors may be securely packaged and returned to Honeywell Analytics clearly marked for environmental disposal.

»

Electrochemical cells should NOT be incinerated as they may emit toxic fumes.

»

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Introduction ii

Information

Honeywell Analytics can take no responsibility for installation and/or use of its equipment if this is not done in accordance with the appropriate issue and/or amendment of the Operating Manual

The reader of this Technical Manual should ensure that it is appropriate in all details for the exact equipment to be installed and/or operated

If in doubt, contact Honeywell Analytics for advice

The following types of notices are used throughout this Technical Manual:

Identifies useful/additional information

Every effort has been made to ensure the accuracy of our documents, however, Honeywell Analytics can assume no responsibility for any errors or omissions in our documents or their consequences Honeywell Analytics greatly appreciates being informed of any errors or omissions that may be found in the contents of any of our documents For information not covered in this document, or if there is a requirement to send comments/corrections about this document, please contact Honeywell Analytics using the contact details given on the back cover of this document

Honeywell Analytics reserves the right to change or revise the information supplied in this document without notice and without obligation to notify any person or organization of such revision or change If information is required that does not appear in this document, contact the local distributor/agent or Honeywell Analytics.

XNX is a registered 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

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Table of Contents iii

1.4 The XNX Front Panel 1-6

1.4.1 Controls and Navigation 1-7

1.4.2 The General Status Screen 1-7

1.4.3 Entering the Menu Structure 1-9

1.5 Main Menu 1-10

1.5.1 XNX Menu Map 1-11

2 Installation and Operation

2.1 Mounting and Location of Detectors 2-3

2.2.1 Mounting the XNX Universal Transmitter 2-3

2.2 Wiring the XNX 2-5

2.2.1 General Wiring Considerations 2-5

2.2.2 Distance Considerations for Installation 2-5

2.2.3 POD Connections 2-92.2.4 4-20mA Output, Common Connections and Power 2-102.2.5 Terminal Block Connections 2-112.2.6 EC Personality Wiring 2-12

XNX Electrochemical Sensor Installation 2-132.2.7 mV Personality Wiring 2-152.2.8 IR Personality Wiring 2-17

Connecting a Searchpoint Optima Plus or Searchline Excel 2-18Connecting Generic mA Devices 2-18

2.3 Options 2-21

2.3.1 Local HART® Handheld 2-212.3.2 Option Board Installation 2-232.3.3 Relays 2-242.3.4 Modbus® 2-25

2.4 Powering the XNX for the First Time 2-26

2.4.1 XNX Units Configured for EC, mV, and IR (except Searchline Excel) 2-262.4.2 XNX IR Units Configured for Searchline Excel 2-27

2.5 Configuring the XNX Universal Transmitter 2-28

2.5.1 Configure Menu 2-28

Select Language 2-28 Set Date & Time 2-29 Set mV Sensor Type 2-30 Set mA Sensor Type 2-31 Gas Selection 2-31 Range & Alarms 2-32 Latching / Non-Latching 2-33

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Table of Contents iv

Table of Contents

Set Units 2-34

mA Levels 2-34 Calibration Interval 2-35

� Accept New Sensor Type 2-36 Beam Block Options 2-36 Path Length 2-38 Unit ID 2-39 Relay Options 2-40 Fieldbus Options 2-40 Configure Security 2-42

2.6 Verifying the XNX Configuration 2-43

2.6.1 Test Menu 2-43

X Inhibit 2-43 Force mA Output 2-44 Force Relays 2-44 Alarm/Fault Simulation 2-452.6.2 ? Information Menu 2-46

Alarm/Fault Status 2-46 Date & Time 2-46 Transmitter Data 2-46

?

Transmitter Status 2-47 Sensor Data 2-47

? Sensor Status 2-48 Gas Data 2-48 Range/Alarm Settings 2-48

mA Level Settings 2-48 Fieldbus Settings 2-49 Relay Data 2-49

3.3 Functional Gas Testing (Bump Test) 3-7

4 Maintenance 4.1 MPD Sensor Cartridge Replacement 4-2 4.2 XNX EC Sensor Cartridge Replacement 4-3

4.2.1 Replacing with the Same Cartridge Type 4-34.2.2 Replacing with a Different Cartridge Type 4-4

5 Warnings / Faults 5.1 Reset Messages 5-2 5.2 Alarm Messages 5-2 5.3 Warning Messages 5-3

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6.1.1 XNX EC Sensor Performance Data 6-3

6.1.2 XNX EC Sensor Cross Sensitivity 6-4

6.1.3 XNX MPD Sensor Performance Data 6-10

6.1.4 Other Sensor Performance Data 6-10

6.2 XNX Certifications by Part Number Series 6-11

6.3.4 Multi Purpose Detector (MPD) 6-17

6.3.5 XNX Catalytic Bead and IR Replacement Sensor

A.1.1 HART Sink, Source and Isolated Wiring A-4

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Release 1 (3/09)

1 Introduction

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Section 1 - Introduction 1-2

1.1 Product Description

1.1.1 Universal Transmitter

The XNX Universal Transmitter is a comprehensive solution designed

to operate in hazardous locations and utilize one of three sensor

technologies or personalities to detect toxic or flammable and oxygen

depletion gas hazards using infrared, catalytic bead or

electrochemical-based sensors XNX Electrochemical Sensors employ the patented

Reflex™ cell fault diagnosis routine Reflex™ checks for cell presence,

cell dry out and cell open or short circuit In the event of a cell failing

this test, a sensor fault code is displayed Reflex™ is automatically

initiated by the transmitter at 8 hourly intervals It is also initiated on

power up or sensor exchange

IR Devices Generic 20mA Input

mV Devices XNX Electrochemical Sensors (EC)

Searchpoint Optima Plus

Searchline Excel

705 705HT

Sensepoint Sensepoint HT XNX Universal Transmitter

Personality Sensor Type Supported Sensors

IR Point and Open-Path Infrared Searchpoint Optima Plus, Searchline Excel

mV Flammable and Toxic 705, 705HT, Sensepoint, Sensepoint HT, MPD (Catalytic Bead Flammable, IR Flammable and IR CO

2 )

XNX EC Toxic and O2 Sensing Electrochemical sensors, with Hot Swap, pre-calibrated through Intrinsically Safe (IS) barrier

Multi-Purpose Detector (MPD)

Catalytic Bead Infrared Flammable Infrared Methane/CO 2

1.2 Product Overview

The XNX transmitter is comprised of the main parts shown below

Cover POD

Intrinsically Safe (IS) Barrier for Optional Local HART Interface Intrinsically Safe (IS) Barrier for Electrochemical Sensor Interface (when equipped)

Enclosure

Figure 1-2 XNX Exploded View

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1.2.1 Enclosure

Available in either Stainless Steel or Aluminum, with 3/4” NPT (UL/CSA

only) or M25 (ATEX/IECEx only) threaded cable/conduit entries, the

XNX Universal Transmitter enclosure is explosion-proof and suitable

for use in -40°C to +65°C (-40°F to +149°F) operating conditions A

5-coat marine finishing process provides the highest degree of corrosion

protection For more information on performance specifications, see

The XNX enclosure is equipped with 5 threaded cable/conduit entries

providing functional and flexible configurations based on sensor and

option choices See Figure 1-4 for cable/conduit entry assignments

and restrictions

Certified stopping plugs are included with the XNX to close the unused

cable/conduit entries The number of stopping plugs varies dependent

upon configuration

CAutIoN

The stopping plugs are for use with the XNX only and should not be

used with any other device(s).

Mounting lugs integral to the XNX enclosure allow easy installation

to a flat surface or 2”-6” (50-150mm) diameter pipe with optional Pipe

Mount Kit or Ceiling Mount Bracket Kit

1.2.2 Cover

Cover Lock Screw

(requires 2mm hex key - included)

Tempered Glass Window

the identical material as specified for the enclosure A tempered glass window requires use of the supplied magnetic wand/screwdriver to activate the four user interface switches that are located on the front

of the display module This allows for non intrusive set up and operation

Magnet Reversible Screwdriver Bit

Figure 1-3 Magnetic Wand/Screwdriver

A locking screw integrated into the cover provides positive locking that can be removed by using the supplied 2mm hex key

XNX Electrochemical Sensor - Local/Remote C

Remote Sensor Connection (except EC ) Any remaining Searchpoint Optima Plus - Remote Any remaining

A

E

D B

C

*

* Limited access due to

IS barrier if equipped with electrochemical cell.

Figure 1-4 XNX Universal Transmitter Cable/Conduit Entry Assignments

1.2 Product Overview

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1.2.3 POD

The POD (Personality, Options and Display) encloses circuit boards

for the display, personality module and optional interfaces

The Personality circuit board determines the XNX behavior based on

the sensor type attached to the XNX and provides whatever interface

is necessary to the options available Connection to the attached

sensor is made through the sensor connector accessed via a slot in

the POD housing

The Option circuit boards vary dependent upon the option selected at

order time Only one of the 3 available interface options (Modbus® or

Relays) can be attached to the XNX When installed, connections to

the options are made to connectors at the bottom of the tray

POD Cover Display PCB

Optional Relay PCB or Modbus PCB or Foundation Fieldbus PCB Personality PCB

POD Tray Local HART ® Connector (when equipped) Option Pluggable Terminal Block Power and Personality

Pluggable Terminal Block

Figure 1-5 POD Exploded View

1.3 Options

Available with any sensor technology or option, this option provides an external access to the HART® interface in the XNX An intrinsically safe (IS) barrier inside the XNX allows the user full control using a HART®

Release 6 compatible hand-held interrogator for programming and configuration The external interface is installed in the lower left cable/conduit entry of the XNX and is intrinsically safe For more information

on HART®, see Appendix A

Intrinsically Safe Barrier for HART Interface

HART Handheld Interface Connector w/Protective Cap

to the XNX are made through a pluggable terminal block on the

1.2 Product Overview

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Modbus® interface circuit board Modbus® RTU protocol uses ASCII/

Hex protocols for communication

1.3.4 XNX Accessories

The XNX Universal Transmitter has various accessories available as

detailed below

Pipe Mount Kit

The Pipe Mount kit (1226A0358) allows the XNX to be mounted to pipe

from 2”-6” (50-150mm) in diameter Kit includes: Pipe Mount Bracket,

(2) Carriage Bolts, Nuts and Lock Washers

Calibration Gas Flow Adapter

The calibration gas flow adapter is used to apply calibration test gas to

the sensor It attaches onto the bottom of the sensor and can be fitted

without removing the weatherproof cover See Section 3 - Calibration

for further details on calibrating the detector

XNX EC S3KCAL Sensepoint 02000-A-1645MPD 1226A0411 705 00780-A-0035

Weatherproof Cap

The weatherproof cap protects the XNX sensors from harsh weather

Sensor Weatherproof Cap Sensor Weatherproof Cap

Remote Sensor Mounting Kit for XNX EC Sensors

The remote sensor mounting kit (S3KRMK) allows the XNX EC sensors

to be remotely mounted via an IS cable kit, up to 50 feet (15 meters) from the transmitter The kit includes 50 feet of shielded cable, cable glands and remote terminal box The cable can be cut to the required length then terminated at the remote terminal box

Collecting Cone

The collecting cone improves detection of lighter-than-air gases such

as hydrogen and methane

XNX EC SPPPCC Sensepoint 02000-A-1642MPD 02000-A-1642 705 02000-A-1642

Ceiling Mount Bracket Kit

The optional Ceiling Mount Bracket Kit (1226A0355) allows the XNX to be mounted to the ceiling The kit includes (2) Stainless Steel Ceiling Mount Brackets, bolts and nuts

1.3 Options

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Remote Gassing Kit

Tube Cap Mounting Bracket

1/4 in (6mm) I.D.

Teflon ® Tubing Device Adapter

(1226A0354) The Remote Gassing Kit enables gas to be applied remotely for performing functional response checks (bump tests) Kit Includes: 50’ Teflon®

tubing, mounting bracket, 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 your device

Duct Mount Kit

The duct mounting kit (3001A0408) can be used with the EC sensor

to allow detection of O2, CO, H2 and H2S gases in ducts When

combined with the MPD Interface Adapter (1226A0382), the duct

mounting kit can accommodate the MPD to detect flammable gases

in a duct application The duct mount kit includes the adapter, gasket

and required fasteners The MPD Interface Adapter includes only the

adapter and requires the 3001A0408 duct mount kit

1226A0382 MPD Adapter Ring 3001A0408 EC/MPD Duct Adapter Kit

1.4 The XNX Front Panel

The XNX uses magnetic switches to enable non intrusive operation

To activate a magnetic switch, hold the factory-supplied magnet up

to the glass window and slowly swipe the magnet directly over the shaded area

For best results when making a selection, hold the magnetic wand/screwdriver as illustrated below

Switch Actuation Visual Indicator

Move Right / Increment Value Move Left / Decrement Value

1.3 Options

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A decal illustrating the proper method for actuating the magnetic

switches is placed on the POD of each XNX

Wand Instruction Decal

Figure 1-7 Operation Decal

A visual indication of the switch actuation will appear in the lower right

corner of the XNX display each time the switch is activated

The switch is actuated by the flux lines between the poles of the

magnet Using this actuation method provides the best performance

overcoming interface variability

In some menus where the displayed value 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 field

For the purposes of this manual, the instruction to use ✓, ✖, or ,

means to activate the relevant magnetic switch as described above

Alarm LED

(Yellow)

Power LED (Green)

Escape

Move Left Decrement Value

Move Right Increment Value

Enter / Accept Switch Actuation Visual Indicator

Figure 1-8 The XNX Front Panel Display

1.4.1 Controls and Navigation

✓

Enter / Accept

The Enter/Accept key is used to access menus, accept changes and

to respond “YES” to system prompts

✖

Escape / Back

Use Escape key to return to previous menus or to answer “NO” to system prompts

Move Left / Decrement Value

Use the Left / Decrement arrow to move through menu options or decrement values when entering text or numbers

Move Right / Increment Value

Use the Right / Increment arrow to move through menu options or Increment values when entering text or numbers

1.4.2 The General Status Screen

Figure 1-9 The General Status Screen

1.4 The XNX Front Panel

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The General Status Screen provides a visual indication of the status

of the XNX Warnings, faults, alarm levels and current concentration

levels are displayed continuously

Figure 1-10 General Status Screen - Normal Operating Mode

The Normal Operating Mode icon gives visual indication of proper

operation The XNX display also shows the concentration level of the

target gas in two different ways The first, found in the upper right corner

of the display, shows a numeric value in the units selected (ppm, ppb,

%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 defined alarm levels (for more information on

setting range and alarm levels, see Range and Alarms)

When a warning is triggered, the Warning icon appears and

information is displayed on the General Status Screen The information

displayed includes the gas concentration and the warning code (see

Warning Code Warning Icon

Figure 1-11 General Status Warning Detail

If the fault icon is displayed, a fault condition has been triggered and

the display will alternate the display of the target gas concentration

and the fault code (see Section 5 - Warnings/Faults for more fault

code information)

Fault Code Fault Icon

Figure 1-12 General Status Fault Detail

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 alarm level exceeded

Target Gas Concentration Alarm Icon Alarm Level Triggered

Figure 1-13 General Status Alarm Detail

In an overrange condition, the alarm icon will display but the target gas concentration bar graph and alarm setpoints will flash, see illustration below

Full Scale Concentration Alarm Level Triggered

Concentration Bar, Alarm Setpoints Flash

Figure 1-14 General Status Overrange Detail

In addition to the graphic Alarm, Fault and Warning indicators, the LEDs

on the front panel will flash in a pattern based on the condition:

Condition LED

Alarm 1 Solid Alarm 2 Flashing

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1.4.3 Entering the Menu Structure

Swiping the magnet over the magnetic switch ✓ or ✖ gives the user

access to the XNX to reset faults and/or alarms, display current settings

or make adjustments to the device

Note:

If the Easy Reset option is set to Lock, users will not have access

to reset alarms and faults For more information on Security

Settings for the XNX, see Configure Security

Figure 1-15 Alarm Reset Screen

From the General Status menu, if the ✖ or ‘escape’ magnetic switch

is swiped, the Alarm Reset Screen activates This allows any user

to silence alarms and reset faults generated by the XNX

Using the ✓ switch resets all alarms and faults and returns to the

General Status Screen, choosing ✖ will return to the General Status

Screen without resetting the alarms and faults

Figure 1-16 The Passcode Screen

Using the ✖ switch will return the user to the General Status Menu If the user selects ✓ from the General Status menu, it will activate the passcode screen

There are two authorization levels that control access based upon

the security level of the user The passcodes for both levels are set at

“0000” from the factory, and must be reset after installation to control

access To change the passcodes, see Configure Security

Level 1 Routine Maintenance Level 2 Technician and Password Admin

accepts the value and moves to the next digit or ✖ will move to the previous digit of the passcode

✓

Figure 1-17 Entering the Passcode

Repeat for each of the remaining digits in the passcode If the passcode

is not entered correctly, the Invalid Passcode screen is displayed and the user is returned to the General Status screen

Figure 1-18 Invalid Passcode Screen

1.4 The XNX Front Panel

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1.5 Main Menu

Once the proper passcode has been entered, the XNX displays the

Main Menu

Figure 1-19 The Main Menu

From the Main Menu, a Level 1 user can:

display the current settings/configuration

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mA Level Settings Fieldbus Settings 2

Relay Settings 1

Event History

X Inhibit Force mA Output Force Relay 1

Alarm/Fault Simulation

Gas Calibration Bump Test Calibrate mA Output Align Excel 4

?

✓

Select Language Set Date &

Time Set mV Sensor Type 6

Set mA Sensor Type 3, 4

Gas Selection Range &

Alarms

mA Levels Accept New Sensor Type 5, 6

Beam Block Options 4

Path Length 4

Unit ID

Calibration Interval Fieldbus Options 2

Relay Options 1

Set Units 7

Configure Security

1 Optional Relay Only

2 Optional Foundation Fieldbus or Modbus Only

3 Searchpoint Optima Only

4 Searchline Excel Only

5 Electrochemical Sensor Only

6 Catalytic Bead Sensor Only

7 mV and ECC only

Latching / Non-Latching

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Release 1 (3/09)

2 Installation and

Operation

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Section 2 - Installation and Operation 2-2

overall certification of the detector.

To reduce the risk of ignition of hazardous atmosphere, de-classify the area or disconnect the equipment from the supply circuit before opening

»

the detector enclosure Keep assembly tightly closed during operation.

Never open the XNX enclosure under power unless the area is known to be non hazardous.

management requirements and environmental legislation.

Alternatively, sensors may be securely packaged and returned to Honeywell Analytics clearly marked for environmental disposal.

»

Electrochemical cells should NOT be incinerated as they may emit toxic fumes.

»

HAzARdouS LoCAtIoNS INStALLAtIoN RequIRemeNtS (uL/CSA)

To reduce the risk of ignition of hazardous atmospheres, conduit runs must have a pour gland installed within 18 inches (457mm) of enclosure

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2.1 Mounting and Location of Detectors

CAutIoN

The location of the transmitters and sensors should be made in

accordance with any relevant local and national legislation, standards

or codes of practice Always replace detectors with a detector of the

same type The detector should be mounted where the gas is most

likely to be present The following points should be noted when locating

gas detectors.

When locating detectors consider the possible damage caused

•

by natural events e.g rain or flooding

Consider ease of access for functional testing and servicing

The placement of detectors should be determined following the

advice of experts having specialist knowledge of gas dispersion,

experts having knowledge of the process plant system and

equipment involved, safety and engineering personnel The

agreement reached on the location of detectors should be

recorded

2.2.1 Mounting the XNX Universal Transmitter

The XNX Universal Transmitter can be mounted in a number of different

methods using the integral mounting tabs

Using the mounting tabs, the XNX can be attached to:

flat wall surface

Allow 11" 280mm for Maint./Service

Allow 12"

305mm For Maintenance Service

XNX with MPD or Local EC Sensor

Figure 2-1 XNX Universal Transmitter Mounting Dimensions and

Clearances

2.1 Mounting and Location of Detectors

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WARNING

When the XNX is equipped with the optional Remote Mount Kit, the

remote sensor MUST be securely mounted to a fixed position The

Remote Sensor Kit is not intended to be used as a hand-held detector.

The XNX is configured with 5 cable/conduit entries built into the

housing for wiring and mounting sensors; Figure 2-2 provides the

guidelines to proper installation of the XNX

Note

While relay wiring can use any available cable/conduit entry in the XNX enclosure, do not use the same cable/conduit entry for both relay reset and relay signal lines to avoid electrical noise.

XNX Electrochemical Sensor - Local/Remote C

Remote Sensor Connection (except EC ) Any remaining Searchpoint Optima Plus - Remote Any remaining

A

E

D B

C

*

* Limited access due to

IS barrier if equipped with electrochemical cell.

Figure 2-2 XNX Universal Transmitter Cable/Conduit Entry Assignments

Integral Mounting Lugs

Figure 2-3 Integral Mounting Lugs and Optional Pipe and Ceiling Mounts

2.1 Mounting and Location of Detectors

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2.2 Wiring the XNX

The XNX is available in 3 basic personalities (versions) which

support a variety of detectors and applications Each of the available

personalities use dedicated interface boards Pluggable terminal blocks

are used for easy connection and service The personality boards and

optional interfaces are enclosed in the electronics POD (Personality,

Options and Display).

The Personality circuit board determines the XNX behavior based on

the sensor type attached to the XNX interface (See Figure 2-7)

The table below defines the three XNX transmitter configurations and

the sensors each support

XNX IR Personality XNX EC Personality

Searchline Excel Searchpoint Optima Plus Local/Remote XNX EC Sensor

XNX mV Personality

705 Local / Remote MPD Local (cat bead and IR) Sensepoint Local / Remote

Sensepoint HT Remote

CAutIoN

Before wiring the XNX, confirm the correct personality boards and

options are installed.

2.2.1 General Wiring Considerations

For proper operation of the XNX Universal Transmitter and sensor technologies, consideration of wiring induced voltage drops, transient electrical noise and dissimilar earth ground potentials is imperative in the design and installation of the system

Loading

Wiring for DC power, 4-20mA signal, remote wiring to sensors must

be sized sufficiently to provide sufficient voltages for the line length and the loads that will be used

in specifying any DC supply Power supply range is 16 to 32 VDC for

EC and mV versions, 18 to 32 VDC for Searchpoint Optima Plus and Searchline Excel and 16 to 32 VDC dependent on the limitations of device for the generic 4-20mA input

Loads

The use of high inrush or inductive loads may affect the performance

of the XNX For best reliability use resistive loads only

2.2.2 Distance Considerations for Installation

Providing power to the transmitter is the factor that will determine the maximum distance of the installation The 4-20 mA output signal will easily handle the distance back to the control equipment

The primary factors determining distance are: minimum operating voltage of the transmitter and/or sensor; maximum current draw of the transmitter/sensor, resistance of the wire used, power supply voltage and current capacity of power supply

2.2 Wiring the XNX

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An additional consideration is the type of installation; specifically, how

many transmitters/sensors are drawing power from the same power

supply and whether these transmitters are using the same pair of wires

(“daisy-chain”) or have their own connections

Types of Installations

There are three basic types of installation: a single transmitter;

multiple transmitters connected to a single power source; and multiple

transmitters connected in a “daisy-chain” configuration

Single Transmitter

This is the simplest type of installation It consists of a single XNX

transmitter installation per power source

Class 2 Power Supply Power SupplyClass 2 Power SupplyClass 2

Figure 2-4 Single Transmitter Installation

Multiple Transmitters Connected to a Single Power Source

This is two or more transmitters sharing a single power source with each

transmitter having its own dedicated wiring to the power source

Class 2 Power Supply

Figure 2-5 Multiple Transmitters Powered by a Single Power Supply

This configuration consists of two or more transmitters installed in

a line The power connections are installed as an extension of the previous transmitter, with the first transmitter being the only one actually wired to the power source

Figure 2-6 “Daisy-Chained” Transmitters from One Power Supply

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Shorter distance between power source and transmitters

•

If a power source fails, several monitoring points go out

•

Power Source Selection

For each type of installation, selection of power supply is important

Power supplies are rated by voltage and power The nominal voltage

for all XNX transmitters is 24V and the power required depends on

the number of points using the same power supply

As a general guideline, the power supply should be capable of providing

more power than is required by the installation A 10 watt power supply

is fine for a single XNX mV with catalytic sensor (6.5 watts required)

but is not a good idea for a single XNX IR with Searchpoint Optima

Plus (10 watts required)

To determine the wattage required, add the maximum power

requirements of all the points that will be sharing the power supply

For example, two XNX mV transmitters with catalytic sensors (6.5

watts each) and one XNX IR with Searchpoint Optima Plus (10 watts)

require a 23 watt power supply (absolute minimum) A 25 watt power

supply will probably handle this installation, but a 30 watt power supply

will be a better choice

The power requirements for different transmitter configurations are:

The type of wire used for connections has an effect on the distance

of the installation This is because some of the voltage is lost in the

wire on the way to the transmitter

Thinner wire (i.e 18 AWG) will lose more voltage than thicker wire (i.e

12 AWG) The amount of voltage lost depends on how much power

is being drawn through the wire; more power means more loss If too much voltage is lost in the wiring, there may not be enough voltage

at the distant point to allow the transmitter to operate

Distance Chart for Single Transmitter Distances

For installations that have dedicated wiring between the transmitter and the power supply, use the following chart These distances assume stranded wire is used

Single Transmitter Distances

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]XNX mV or EC

With Sensor

1140 feet[347 meters]

4620 feet[1408 meters]XNX IR with

Searchline Excel

2.2 Wiring the XNX

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“Daisy-Chained” Transmitter Distances

It is difficult to calculate distances for this configuration There are many

factors to be considered: distance from control room to first transmitter,

distance between transmitters, sensor types, etc A few selected

scenarios are presented here to provide a base to work from

Transmitter 1 Transmitter 2 Transmitter 3 Transmitter 4 Transmitter 5

Several transmitters equally spaced from themselves and the

1

power source

2 Transmitters - Distance “d”

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]

XNX mV or EC

With Sensor

XNX IR with

220 feet[67 meters]

XNX IR with

Searchline Excel

185 feet[56 meters]

295 feet[90 meters]

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]

XNX mV or EC

With Sensor

190 feet[58 meters]

300 feet[91 meters]

XNX IR with

110 feet[33 meters]

175 feet[53 meters]

280 feet[85 meters]

XNX IR with

Searchline Excel

90 feet[27 meters]

145 feet[44 meters]

235 feet[71 meters]

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

With Sensor

110 feet[33 meters]

180 feet[55 meters]

290 feet[88 meters]

65 feet[20 meters]

105 feet[32 meters]

165 feet[50 meters]

Searchline Excel

55 feet[17 meters]

85 feet[26 meters]

140 feet[43 meters]

225 feet[68 meters]

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

With Sensor

75 feet[23 meters]

120 feet[36 meters]

190 feet[58 meters]

45 feet[13 meters]

70 feet[21 meters]

110 feet[33 meters]

Searchline Excel

35 feet[11 meters]

55 feet[17 meters]

90 feet[27 meters]

150 feet[46 meters]

Several transmitters installed in pairs with each pair equally

2

spaced from themselves and the power source These distances assume the paired transmitters are installed within 10 feet [3 meters] of each other

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18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]

XNX mV or EC

With Sensor

XNX IR with

Searchline Excel

280 feet[85 meters]

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]

XNX mV or EC

With Sensor

190 feet[58 meters]

300 feet[91 meters]

XNX IR with

110 feet[33 meters]

175 feet[53 meters]

280 feet[85 meters]

XNX IR with

Searchline Excel

90 feet[27 meters]

145 feet[44 meters]

235 feet[71 meters]

18 AWG[1.0 mm2]

16 AWG[1.5 mm2]

14 AWG[2.0 mm2]

12 AWG[3.5 mm2]

XNX mV or EC

With Sensor

95 feet[33 meters]

150 feet[45 meters]

240 feet[73 meters]

XNX IR with

55 feet[17 meters]

85 feet[26 meters]

140 feet[42 meters]

225 feet[68 meters]

XNX IR with

Searchline Excel

45 feet[14 meters]

70 feet[21 meters]

115 feet[35 meters]

185 feet[56 meters]

2.2.3 POD Connections

The illustration in Figure 2-7 details the connections available on each

of the terminal blocks for each type of personality board

Option Boards

A B

C D

E

F

Figure 2-7 XNX Personality Board Terminal Block Legend

Board Type Function S1 S2 Board Type Connection Function

EC Personality

4-20mA Output

Board Type Function S3 S4 Board Type Connection Function

IR Personality IR 4-20mA Input Source   EC Personality J2 EC IS Barrier

Board Type Connection Function Board Type Connection Function

2.2 Wiring the XNX

Trang 27

Each of the personalities use a single terminal block for connection

with the exception of the IR personality, which necessitates the use

of a second terminal block

The personality boards also provide a dedicated pair of jumper

switches to define output of the XNX as isolated 4-20mA, Sink 20mA

or Source 20mA as well as a service jumper to allow power to the

loop to continue if the XNX is being serviced A separate connector

is used to activate local HART® (see Section 2.3.1)

Local HART® provides an external access to control the XNX An IS

barrier inside the XNX allows the user to attach an external

hand-held interrogator for programming and configuration The external

interface is installed in the lower left cable/conduit entry of the XNX

and is intrinsically safe (IS)

Note:

Open loop faults are not available due to HART and Modbus

interfaces where a 4-20 may not be used In this case, open

loop, 0mA, must be used as the diagnostic

The Option circuit boards vary dependent upon the option selected at

order time Only one of the 2 available interface options (Modbus® or

Relays) can be attached to the XNX When installed, connections to

the options are made to connectors at the bottom of the POD

2.2.4 4-20mA Output, Common Connections and Power

Setting 4-20mA operation; S1 & S2

The XNX Universal Transmitter allows the user to configure the

4-20mA output to Sink, Source or Isolated mode operation via two

programming switches on the POD The table below shows the S1

and S2 setting and corresponding output configuration

S1 S2 Source Down Up

Sink Up Down

Isolated Down Down

Power and 4-20mA connections are made at TB-1 and are identical for the EC, IR and mV Personality Boards For user convenience a second set of Terminals have been provided to eliminate the need for

a secondary junction box in multi node systems when used with the supplied terminal jumpers

Controller +VE

Figure 2-8 Sink wiring for XNX

XNX Source Configuration

Controller +VE

Figure 2-9 Source wiring for XNX

2.2 Wiring the XNX

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Figure 2-10 Isolated wiring for XNX

The XNX Universal Transmitter power consumption is dependent on

the sensor and options for the specific configuration The input voltage

must be maintained at 16 to 32 VDC for EC and mV units and 18 to

32 VDC for IR units for proper operation

The table below defines the XNX typical and maximum power

consumption based on configuration

Configuration Max Power Inrush XNX EC 6.2 w <1A, <10ms@24VDC

XNX mV 6.5 w <750mA <2ms@24VDC

XNX IR 13.2w <1A, <1sec@24VDC

Labels are applied to the back of the POD to identify each of the

connection points

2.2.5 Terminal Block Connections

Customer connections to the XNX are made via pluggable terminal

blocks secured to the back of the POD The terminal blocks are keyed

and polarized A color coded label assist in wiring when the block is removed from the POD

The terminals are suitable for use with 12 to 28 AWG or 0.8 to 2.5mm2

wire Wire insulation must be stripped 5/16” (0.312”) or 8mm2 Tighten each terminal to a maximum of 4.5 in/lbs Depending on Personality and Option one to four 2, 6, 9 or 10 position terminal blocks are supplied.Two terminal block jumpers are provided to provide an electrical connection without connection to the Personality Board Install the jumpers between pins 1 and 2 and between pins 3 and 4 to support multi-node wiring

Note:

Pins 2 and 4 of terminal block TB1 have no internal connection

on the personality board When used in conjunction with the terminal block jumpers, pins 2 and 4 can provide additional 4-20mA connections or power feed for daisy-chained units

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2.2.6 EC Personality Wiring

WARNING

When the XNX is equipped with the optional Remote Mount Kit,

the remote sensor MUST be securely mounted to a fixed position

The Remote Sensor Kit is not intended to be used as a hand-held

detector.

Position EC TB1

1 +24

2

4

J1 - Local HART Connector

S1 and S2 - Signal Output Jumper Switch

▼

▲

S2 S1

4 5 6

Figure 2-12 XNX EC Personality Board Terminal Blocks and Jumper

Switches and Terminal Block Assignments

CAutIoN

Be certain to dress the wires properly to ensure cabling does not contact

switches 1-2 on the back of the POD

Do not force the POD into the enclosure as it may indicate an interference

condition resulting in damage to the wiring, POD or switch settings.

EC Adaptor

Optional Local HART

-J1 HART S1 S2

EC IS Barrier

Sensor Cartridge

Weatherproof Cap Sensor Retainer

Sensor Cartridge

Weatherproof Cap Sensor Retainer

Local Sensor Mounted to Transmitter

2.2 Wiring the XNX

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XNX Electrochemical Sensor Installation

Available EC Sensors and Ranges

Gas Maximum Range Number Part

Hydrogen Sulfide (Low Low Range) 15.0 ppm XNX-XSH3SS

Hydrogen Sulfide (Low Range) 50.0 ppm XNX-XSH1SS

Hydrogen Sulfide (High Range) 500 ppm XNX-XSH2SS

Sulfur Dioxide (Low Range) 20.0 ppm XNX-XSS1SS

Sulfur Dioxide (High Range) 50.0 ppm XNX-XSS2SS

Note:

Reference Control Drawing 3000E3157 for install requirements

on EC cells and remote mounting

EC Sensor Installation

CAutIoN

For biased sensors (e.g Nitrogen Dioxide) remove the sensor stabilizer from the bottom of the sensor prior to installation.

Using Figure 2-13 as a guide, follow the procedure below:

Check that the label on the new sensor is the correct gas

supplied hex key and refit the weatherproof cover

Countdown time of up to 180 seconds (dependent on sensor

the Range, alarm levels and other important settings must

be set; see Section 2.5 - Configuring the XNX Universal

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Figure 2-14 Installing Plug In Sensor

XNX EC Sensor Remote Mounting Kit

The remote sensor mounting kit is used to mount the XNX EC sensor

up to 50 feet away from the transmitter To remotely mount the sensor, follow the procedure below

Unscrew the weatherproof cover, loosen the retainer locking

1

screw and unscrew the sensor retainer

Remove the sensor by pulling without twisting

Take care not to cut the cable too short Once cut, additional lengths

of cable cannot be added as this will invalidate the intrinsically safe certification We also recommend that a loop of cable is made at the junction box to allow slack for any future re-termination.

The enclosure of the remotely mounted sensor contains aluminum Care must be taken to avoid ignition hazards due to impact or friction when installed in the Zone 1 location.

All cable entry devices and blanking elements shall be certified in type

of explosion protection flameproof enclosure “Ex e”, suitable for the conditions of use and correctly installed.

Mount the remote sensor junction box ensuring enough room

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Plug the sensor into the socket at the bottom of the terminal box

Sensor Mounted to Remote Sensor Kit

2.2.7 mV Personality Wiring

XNX Universal Transmitter with the mV personality Board allows interface to HA’s Multi Purpose Detector (MPD) and field proven 705 and Sensepoint devices

CAutIoN

Check

• Section 6 - Specifications to ensure the XNX and mV Sensor has the appropriate approvals for your installation prior to commissioning

Check the mV Sensor you are installing has compatible threads -

• 3/4 NPT or M25.

Read Section 2.2 defining the XNX power and 4-20mA output connections that are common to all Personalities

Connections from the mV Sensor to the XNX are made via a single pluggable terminal block allowing ease of installation and service HA recommends an 8” (203mm) service length for wiring be maintained The Wire Colors for the connections for each sensor type are shown

Trang 33

Figure 2-16 XNX mV Personality Board Terminal Blocks, Jumper Switches and Wire Color Chart

J1 - Local HART Option Connector

S1 and S2 - 20mA Output Jumper Switch

▼

▲

mV Sensor Type Catalytic Bead MPD w/IR

MPD 705HT705 S’point HTS’point S’pointPPM IR%Vol IR Flam

Internal Ground

1

2 34

5 6

7 89

Local HART

IS Barrier (optional)

HART Adaptor

4 2

Ref +

9 7 5

J1 HART S1 S2

Com Sense -

Optional Local HART

IS Barrier must

be connected to J1

Ground Wire from Sensepoint PPM and HT Internal Ground Lug

MPD 705 Sensepoint

Figure 2-17 mV Personality Wiring

2.2 Wiring the XNX

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mV Remote Sensor Mounting

The sensor can be mounted remotely from the transmitter; the

installation will vary by installed location, sensor and thread type used

To remotely mount the sensor, follow the procedure below

Unscrew the XNX’s weatherproof cover, loosen the retainer

1

locking screw with the supplied hex key

Run conduit from one of the XNX’s available conduit entries to

2

the location of the remote terminal housing

A Terminal Housing provides a mounting base for the sensor

and contains the associated electronic circuit The installation

wiring enters the Terminal Housing via conduit

Killark HKB-BC Box

00704-A-1755 Adalet X1HFC3L Box00704-A-1756 Honeywell Analytics Box00780-A-0100

Figure 2-18 Remote Terminal Housings

The distance between the XNX Transmitter and remote installation

must comply with the following to insure proper operation Distances

are dependent on sensor types and the wire gauge used

AWG Metric Wire Gauge Series.Sensepoint MPD CB1, 705

Series Sensors MPD IC1, IV1 & IF1 Sensors

* Frequency of Zero calibration may increase due to the changes in wire resistance from changing temperature.

Wire the pluggable terminal block as shown in

plug the connector into the back of the mV personality board.Mount the remote sensor junction box ensuring enough room

4

below to fit the sensor and weatherproof cover

Attach the conduit to the remote terminal box

All cable entry devices and blanking elements shall be certified in type

of explosion protection flameproof enclosure “Ex d” or “Ex e”, suitable for the conditions of use and correctly installed.

Attach and wire the sensor into the terminal box

as well as diagnostic information

2.2 Wiring the XNX

Trang 35

The XNX provides a 4-20mA output reflecting the input received as

well as offering additional diagnostic indication, data via HART® or via

any of the additional communication options offered

Be sure to have read Section 2.2 defining the XNX power and 4-20mA

output connections that are common to all Personalities

CAutIoN

Be certain to dress the wires properly to ensure cabling does not contact

switches 1-4 on the back of the POD

Do not force the POD into the enclosure as it may indicate an interference

condition resulting in damage to the wiring, POD or switch settings.

WARNING

Setting of S3 and S4 while power is applied or improperly set prior to

applying power WILL PERMANENTLY DAMAGE the XNX Both switches

must be set in either Source or Sink prior to applying power.

Do not adjust switch settings while power is applied to the XNX;

permanent damage WILL occur

Connecting a Searchpoint Optima Plus or Searchline Excel

Connections from the Searchpoint Optima Plus or Searchline Excel

to the XNX are made via two pluggable terminal blocks allowing ease

of installation and service (see Figure 2-19) HA recommends an 8”

service length for wiring be maintained

The Searchpoint Optima Plus or Searchline Excel can be supplied in

either Sink or Source mode operation and is typically labeled on the

white wire exiting the Searchpoint Optima Plus or Searchline Excel

Use the table in Figure 2-19 to set S3 and S4 to the same output type

that appears on the wire tag of the IR device

Note:

A second, black-handled screwdriver is included for use on terminal blocks 2 and 4 This tool is smaller than the magnetic wand and is designed to fit into the terminal connections on TB2 and TB4

For more information see the Searchpoint Optima Plus Operating Instructions (2104M0508) or the Searchline Excel Technical Manual (2104M0506)

Connecting Generic mA Devices

IR personality type provides for a Generic mA input under sensor type configuration The XNX can be used to convert the mA input

to be read over HART protocol or optional Modbus and set optional relays (if equipped) Additional configuration of gas type and unit ID for reporting is required (see Gas Selection) For Generic mA devices, input values below 3mA will generate Fault 155

Use the following schematics to set S3 and S4 to the SAME output

type that appears on the wire tag of the mA device

2.2 Wiring the XNX

Trang 36

24V 7W Max

XNX S3 and S4 should be in the UP position

Set mA Device and XNX to the same output type.

XNX mA Input Source Configuration

XNX S3 and S4 should be in the DOWN position

Set mA Device and XNX to the same output type.

HART

20 mA Operation LOCAL J1

S1 +V 1-1

- Ir

+ Ir 1-8 Sig 1-9

S1

Source Sink Isolated

J1 - Local HART Connector

S1 and S2 - 20mA Output Jumper Switch

S3 and S4 - IR 20mA Input Jumper Switch

Sink Source

TB2 Desc From Searchpoint Optima Plus Searchline Excel

TB1 Desc From Searchpoint Optima Plus

TB1

1 2

TB2

Figure 2-19 XNX IR Personality Board Terminal Blocks, Jumper Switches

and Wiring Guide

2.2 Wiring the XNX

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Attaching the Searchpoint Optima Plus to the XNX Universal

Transmitter

For M25 entries, insert the seal (P/N 1226-0410) into the proper cable/

conduit opening then thread the lock nut (P/N 1226-0409) onto the

Optima to the end of the threads then thread the optima body into the

XNX until the seal compresses and/or optima bottoms out, reverse

until the semi-circular pattern of holes on the front of the weather

protection are on the bottom (see below) then tighten the lock nut to

the XNX body

The 3/4” NPT entries do not require the seal and locknut, the form of

the threads provide positive locking and sealing

Note:

When attaching the Searchpoint Optima Plus, be sure to coat the

threads with an anti-seize compound to prevent corrosion

Searchline Excel and Searchpoint Optima Plus Remote Installation

Junction Boxes are available for the Searchline Excel and Searchpoint

Optima Plus to facilitate remote mounting from the XNX Universal

Transmitter Junction boxes are available for installations requiring

UL/CSA or ATEX approvals Consult the Searchline Excel Technical

Handbook (2104M0506) or Searchpoint Optima Plus Operating

Instructions (2104M0508) for specifics on remote installations or contact

your Honeywell Analytics representative for more information

Local HART

IS Barrier (optional) HART

Adaptor

Optional Local HART

IS Barrier must be connected to J1

4 2

Sig Gnd +24 +

9 7 5

J1 HART S1 S2

B 2 Terminal Block 2

IR Data S3 S4

Figure 2-20 IR Personality Wiring - Searchpoint Optima Plus

2.2 Wiring the XNX

Trang 38

4 2

Sig Gnd +24 +

9 7 5

J1 HART S1 S2

B 1

Terminal Block 2

IR Data S3 S4

Available with any sensor technology or option, this option provides an external access to the HART® interface in the XNX An IS barrier inside the XNX allows the user to attach an external hand-held interrogator for programming and configuration The external interface is installed

in the lower left cable/conduit entry of the XNX and is intrinsically safe (IS)

Intrinsically Safe Barrier for HART Interface

HART Handheld Interface Connector w/Protective Cap

installed

The HART® Protocol is a communication technology used with smart process instrumentation, providing two-way digital communication simultaneously with the 4-20mA analog signaling used by traditional instrumentation equipment For more detailed information on HART®,

The implementation of the HART® protocol in the XNX:

Meets HART

• ® 5.10 physical layer specification

(HCF_SPEC-54, Revision 8.1)

2.3 Options

Trang 39

Release Date: August 24, 1999 titled FSK Physical Layer

•

specification

The physical layer is tested according to HART

Layer Test Procedure, HCF_TEST-2

This specification also caters for HART

In point-to-point mode, the 4–20 mA signal is used to communicate

one process variable, while additional process variables, configuration

parameters, and other device data are transferred digitally via HART®

protocol (Figure 2-23) The 4–20 mA analog signal is not affected by

the HART® signal

Note: Instrument power is provided by an interface

or external power source that is not shown.

Figure 2-23 Point-to-Point Mode of Operation

Input/Output (I/O) System

Handheld Terminal

Field Devices

Control System or Other Host Application

Note: Instrument power is provided by an interface

or external power source that is not shown.

Figure 2-24 Multidrop Mode of Operation

Note

Use multidrop connection for supervisory control installations that are widely spaced, such as pipelines, custody transfer stations, and tank farms

In general, the installation practice for HART® devices is the same as conventional 4-20mA instrumentation Individually shielded twisted pair cable, either in single-pair or multi-pair varieties, is the recommended wiring practice Unshielded cables may be used for short distances if ambient noise and cross-talk will not affect communication

2.3 Options

Trang 40

The minimum conductor size is 0.51mm diameter (#24 AWG) for cable

runs less than 1,524m (5,000 ft) and 0.81mm diameter (#20 AWG)

for longer distances

Cable Length

Most installations are well within the 3,000m (10,000 ft) theoretical

limit for HART® communication However, the electrical characteristics

of the cable (mostly capacitance) and the combination of connected

devices can affect the maximum allowable cable length of a HART®

network The table in Figure 2-25 shows the affect of cable capacitance

and the number of network devices on cable length The table is based

on typical installations of HART® devices in non-IS environments, i.e

no miscellaneous series impedance

Detailed information for determining the maximum cable length for

any HART® network configuration can be found in the HART® Physical

Layer Specifications

Cable Capacitance – pf/ft (pf/m) Cable Length – feet (meters) Number of Network

1 9,000 ft

(2,769 m)

6,500 ft(2,000 m)

4,200 ft(1,292 m)

3,200 ft(985 m)

5 8,000 ft

(2,462 m)

5,900 ft(1,815 m)

3,700 ft(1,138 m)

2,900 ft(892 m)

(2,154 m)

5,200 ft(1,600 m)

3,300 ft(1,015 m)

2,500 ft

769 m)

Figure 2-25 Allowable Cable Lengths for 1 mm (18 AWG) Shielded Twisted

Pair

2.3.2 Option Board Installation

If your XNX was not factory fitted with one of the two available options

- Relays or Modbus®, or you are retrofitting a previously installed XNX, this section will describe the installation steps for the option boards

inside of the XNX Transmitter housing If your XNX is currently

in use, carefully unplug the terminal blocks from the rear of the POD

Place the POD face down on a flat work surface taking care to

4

not damage the LCD screen

Remove the 6 case screws from the POD set them aside in a

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