Honeywell XNX Manuel utilisateur

Quick Start Guide

XNX Universal Transmitter

XNX Universal Transmitter Quick Start Guide 3

WARNINGS

The XNX Universal Transmitter is certied and designed for installation and use »

worldwide in hazardous areas.

Installation must be in accordance with the recognized standards of the appropriate »

authority in the country concerned.

Access to the interior of the detector, when carrying out any work, must only be conducted »

by trained personnel.

Before carrying out any work, ensure local regulations and site procedures are followed. »

Appropriate standards must be followed to maintain the overall certication of the detector.

To reduce the risk of ignition of hazardous atmosphere, 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.»

The detector must be earthed/grounded for Intrinsic Safety, electrical safety and to limit »

the effects of radio frequency interference. An earth/ground point is provided inside

and outside the unit. The internal grounding shall be used as the primary equipment

ground. 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 sensor to organic solvents or ammable liquids.»

At the end of their working life, sensors must be disposed of in an environmentally »

safe manner. Disposal should be according to local waste 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.

All ¾ inch NPT conduit, stopping plugs and adapters must be installed with 5 ¼ threads »

(minimum) engaged to Maintain Explosion Proof rating.

The XNX Cover Assembly must be fully seated to enclosure 9 threads (minimum) to »

maintain Explosion Proof rating.

Stopping Plugs supplied (Honeywell Part Number 1226-0258) are approved for use »

ONLY with the XNX Universal Transmitter.

For units tted with the Optional Relay Module: Relay Contact Ratings are 250 VAC »

5A, 24 VDC 5A Resistive Loads Only.

Use copper conductors only, 60/75»°C, terminal block screws should be tightened to

4.5 Lb/in maximum.

Reference XNX Control Drawing 1226E0402 for additional information regarding IS »

function (Local HART and EC Personality).

HAzARdouS LocAtIoNS INStALLAtIoN RequIRemeNtS (AteX)

Read and understand this manual before installation and use.»

Use only Certied M25 cable glands for installation.»

Shielded armoured cable is required for CE compliance.»

XNX Universal Transmitter Quick Start Guide

1 Mounting and Location of Detectors��7

1�1 Mounting the XNX Universal Transmitter��7

2 Wiring the XNX��10

2�1 General Wiring Considerations��10

2.2 Distance Considerations for Installation............................11

2�3 POD Connections��14

2�4

4-20mA Output, Common Connections and Power��14

2�5 Terminal Block Connections ��16

2�6 EC Personality Wiring ��17

2.6.1 XNX Electrochemical (EC) Sensor Installation ..............19

2�7 mV Personality Wiring ��21

2�8 IR Personality Wiring ��25

2.8.1 Connecting a Searchpoint Optima Plus or Searchline

Excel ..............................................................................26

2.8.2 Connecting Generic mA Device.....................................29

3 Options��32

3�1 Local HART® Handheld ��32

3�2 Relays��33

3�3 Modbus® �� 34

4 Powering the XNX for the First Time��35

4�1 XNX Units Configured for EC, mV, and IR (except Searchline

Excel) �� 35

4�2 XNX IR Units Configured for Searchline Excel��36

4�3 Configuring the XNX Universal Transmitter��38

5 The XNX Front Panel ��39

5�1 Controls and Navigation��39

5�2 The General Status Screen��39

5�3 Entering the Menu Structure��41

5�4 Displaying Transmitter Information ��42

6 Gas Calibration Menu ��42

6�1 Calibration ��43

6.1.1 Calibration Procedure ....................................................43

6.1.2 Zero and Span Calibration for XNX EC Sensors ...........45

6.1.3

Zero and Span Calibration of XNX EC Hydrogen Sulfide (H2S)

Sensors ........................................................................................... 45

6.1.4 XNX EC Sensor Operational Life...................................46

6.1.5

Zero and Span Calibration for MPD Sensors ............................46

6.1.6 Cross Calibration procedure for MPD-CB1....................48

6.1.7 Calibrating the 705/705HT .............................................50

6.1.8 Calibrating the Sensepoint/Sensepoint HT ....................50

Table of Contents

XNX Universal Transmitter Quick Start Guide 5

Table of Contents (cont’d)

6.1.9 Calibrating the Searchline Excel and Searchpoint Optima

Plus................................................................................50

6�2 Functional Gas Testing (Bump Test)��50

8 XNX Catalytic Bead and IR Replacement Sensor Cartridges��53

9 Warning Messages ��53

10 Fault Messages��57

11 Informational Messages ��67

12 Control Drawings ��69

13 XNX Labels��73

UL Certification Labels ��73

ATEX Certification Label ��73

XNX Universal Transmitter Quick Start Guide

XNX Universal Transmitter Quick Start Guide 7

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.

Consider the possible damage caused by natural events e.g. rain or ﬂooding•

when locating detectors.

Consider ease of access for functional testing and servicing.•

Consider how escaping gas may behave due to natural or forced air•

currents.

Note

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.

1�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•

Unistrut• ®

With the optional Pipe Mount kit, the XNX can be mounted to pipe of diameter 2 to

6 in (50 to 150mm).

A ceiling mount bracket kit (1226A0358) is also available.

Integral Mounting Lugs

Figure 1. Integral Mounting Lugs and Optional Pipe and Ceiling Mounts

XNX Universal Transmitter Quick Start Guide

1.67"

42.41 mm

5.6"

124.24 mm

6.00"

15.4 mm

7.75"

196.85 mm 4.48"

113.8 mm

0.625"

15.88mm

2.054"

52.18mm

0.945"

24mm

1.2"

31.75mm

1.768"

44.90 mm

3.176"

80.67 mm

1.768"

44.90 mm

0.55"

14.35 mm

6.138"

158.75mm

Allow 11" 280mm

for Maint./Service

101.6mm

152 mm

w/sun shield

XNX with

Searchpoint Optima Plus

Allow

12"

305mm

For

Maintenance

Service

XNX with MPD or Local EC Sensor

Figure 2. XNX Universal Transmitter Mounting Dimensions and Clearances

WARNING

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

MUST be securely mounted to a xed position. The Remote Sensor Kit is not intended

to be used as a hand-held detector.

XNX Universal Transmitter Quick Start Guide 9

The XNX is conﬁgured with 5 cable/conduit entries built into the housing for wiring and

mounting sensors. Figure 3 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.

Option Position

Local HART®Option B

MPD, 705 Series, Sensepoint Series C

Catalytic Bead Sensor C

Searchpoint Optima Plus A or E

Searchline Excel Typically C

Remote Sensor Connection (except EC ) Any remaining

Searchpoint Optima Plus - Remote Any remaining

Modbus®Any remaining

Relays Any remaining

Power Any remaining

* Limited access due to

IS barrier if equipped with

electrochemical cell.

Figure 3. XNX Universal Transmitter Cable/Conduit Entry Assignments

Integral Mounting Lugs

Figure 4. Integral Mounting Lugs and Optional Pipe and Ceiling Mounts

XNX Universal Transmitter Quick Start Guide

2 Wiring the XNX

Personality circuit boards determine the XNX behavior based on the sensor type

attached to the XNX interface.

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

Generic mA Sensors XNX EC Sensor Remote Mount Kit

XNX mV Personality

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

705HT Local / Remote MPD Remote Sensepoint PPM Local/Remote

Sensepoint HT Remote

cAutIoN

Before wiring the XNX, conrm the correct personality boards and options are

installed.

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.

Note:

To maintain EMC integrity, wiring must be shielded by either an integral shield

or run through conduit or pipe. Shield should provide 90% coverage.

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.

Isolation

Isolating power and signal carrying conductors is recommended.

Circuit Protection

Supply circuits must provide over current protection. Class 2 power supplies are

required for 24 volt DC supply. Consider Inrush current in specifying any DC supply.

Power supply range is 16 to 32 VDC for EC and mV versions, 18 to 32 VDC for

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