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Quick Start Guide

XNX Universal Transmitter

Table of Contents

Types of Installations ���������������������������������������������������� 12 Power Source Selection������������������������������������������������ 12 Wire Selection ���������������������������������������������������������������� 12 Single Transmitter Distances ��������������������������������������� 13 Daisy-Chained Transmitter Distances ������������������������� 13

Setting 4-20mA operation; S1 & S2������������������������������ 16 HART® Communications ����������������������������������������������� 18 Point-to-Point Mode������������������������������������������������������� 18 Multi-drop Mode������������������������������������������������������������� 18 Cable Length ������������������������������������������������������������������ 18

4�8�1 Connecting a Searchpoint Optima Plus or Searchline Excel ���������������������������������������������������������������������� 30

Attaching the Searchpoint Optima Plus to the XNX Universal Transmitter���������������������������������������������������� 30

Searchline Excel and Searchpoint Optima Plus Re- mote Installation ������������������������������������������������������������ 30

Searchpoint Optima Plus or Searchline Excel Wiring Recommendations��������������������������������������������������������� 31

4�8�2 Connecting Generic mA Device ��������������������������������� 32

1 Introduction

The XNX Quick Start Guide is an abbreviated print reference for the installation, operation, and maintenance of the XNX® Universal Transmitter. Refer to the XNX Universal Transmitter Resource CD (Honeywell part number 1998-0748) for these comprehensive documents, as appropriate, before installing or commissioning the transmitter:

Manuals

XNX Technical Manual (1998M0738)

XNX Quick Start Guide (1998-0744)

MPD Operating Manual (1998-0745)

XNX Safety Manual (1998-0808)

XNX Foundation Field bus Technical Manual (1998-xxxx)

Control Drawings

1226E0402 XNX Control Drawing- UL,CSA, XM Approved Model XNX-UT**-******

1226E0454 XNX Control Drawing- UL, INMETRO Approved Models XNX-BT*****

3000E3159 XNX ECC Cartridge Control Drawing- XNXX***** Series EC Cartridges and Remote Mount Kit.

For other sensor types such as Sensepoint Optima Plus, Searchline Excel, model 705 HT, or Sensepoint sensors, refer to their respective manuals for installation and ordering information.

2 Warnings

High off-scale readings may indicate an explosive concentration of gas.

•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 trained personnel.

•Ensure that local regulations and site procedures are followed when carrying out any work. Appropriate standards must be followed to maintain the overall certiication of the detector.

•To reduce the risk of ignition of hazardous atmosphere, disconnect the equipment

from the supply circuit before opening the detector enclosure. Conduit runs must have a seal itting connected within 18 inches (45 cm) of the enclosures. Keep the 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. Earth/ground points are provided inside and outside the unit. EMI note for applications using shielded cable: 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 with or in any way disassemble the sensor cells.

•Do not expose the transmitter or sensor cells to temperatures outside the recommended range.

•Do not expose the sensor to organic solvents or lammable liquids.

•At the end of their working lives, 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, clearly marked for environmental disposal, and returned to Honeywell Analytics.

•Do NOT incinerate electrochemical cells as they may emit toxic fumes.

•Verify all outputs, including display, after installation, after service events, and periodically to ensure the safety and integrity of the system.

•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.

•As some test gases are hazardous, exhaust the low housing outlet to a safe area. Do not use the XNX Universal Transmitter in oxygen-enriched atmospheres. (In oxygen-enriched atmospheres, the electrical safety is not given.)

3 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 looding 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.

notes:

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.

CSA certiication does not cover XNX EC cartridges or XNX EC cartridge remote mounting kit, daisy-chained XNX combustible gas transmitters or the

use of HART®, Modbus, or Foundation Fieldbus used for combustible gas performance. HART®, Modbus, or Foundation Fieldbus may be used only for

data collection or record keeping with regards to combustible gas detection.

FM approved conigurations (see the XNX Universal Transmitter Technical Manual, section 6.3 XNX Certiications by Part Number Series) also limit the

use of HART®, Modbus, or Foundation Fieldbus to use for diagnostics, data collection, or record keeping.

The XNX Universal Transmitter is certiied and designed for installation and use worldwide in hazardous areas.

3.1 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.

notes:

Agency certiications require that EC and mV sensors face down. Optima sensors must be mounted horizontally.

Integral Mounting Lugs

Figure 1. Integral mounting lugs and optional pipe and ceiling mounts

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

detector.

The XNX is conigured 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.

Figure 3. XNX Universal Transmitter cable/conduit entry assignments

4 Wiring the XNX transmitter

Personality circuit boards determine the XNX behavior based on the sensor type attached to the XNX interface.

The table below deines the three XNX transmitter conigurations and the sensors each support.

caution

Before wiring the transmitter, conirm that the correct personality boards and options are installed.

4.1 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:

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. Where wiring is in pipe, a shielded cable is not required.

Loading

Wiring for DC Power, 4-20mA Signal, remote wiring to sensors must be sized suficiently to provide suficient 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 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.

4.2 Distance Considerations for Installation

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 coniguration.

Power Source Selection

XNX Universal Transmitter Maximum Power Consumption

Wire Selection

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.

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

note

If multiple transmitters are using the same power supply, make sure the power supply wattage rating is high enough to power all transmitters simultaneously.

Daisy-Chained Transmitter Distances

A few selected scenarios are presented here to provide a base to work from.

1.Several transmitters equally spaced from themselves and the power source.

2 Transmitters - Distance “d”

3 Transmitters - Distance “d”

2.Several transmitters installed in pairs with each pair equally spaced from themselves and the power source. These distances assume the paired transmitters are installed within 10 feet [3 meters] of each other.

2 Transmitters - Distance “d”

4.3 POD Connections

The illustration in Figure 4 details the connections available on each of the terminal blocks for each type of personality board.

4.4 4-20mA Output, Common Connections and Power

Setting 4-20mA operation; S1 & S2

The XNX Universal Transmitter allows the user to conigure 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 coniguration.

The XNX Universal Transmitter power consumption is dependent on the sensor and options for the speciic coniguration. For proper operation, the input

voltage must be maintained at 16 to 32 volts DC (for EC and mV transmitters) or 18 to 32 volts DC (for IR transmitters).

The table below deines the XNX typical and maximum power consumption based on coniguration:

HART® devices can operate in one of two conigurations: point-to-point or multi- drop.

HART® Communications

Point-to-Point Mode

In point-to-point mode, the 4–20 mA analog output is used to report concentration and the status of the transmitter to a dedicated channel of

the control system. Additionally, concentration, status, diagnostics, and coniguration are available digitally using the HART® protocol.

Multi-drop Mode

Multi-drop mode allows up to eight transmitters to interface with a single channel of a control system for non-safety-critical applications.

note:

Use a multi-drop connection for supervisory control installations that are widely spaced such as pipelines, custody transfer stations, and tank farms.

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 runs.

Cable Length

Most installations are 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 following table shows the effect 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.

Allowable Cable Lengths for Various Capacitances

(for 1 mm, #18 AWG shielded twisted pair)

note:

See Appendix A of the XNX Technical Manual for more information about the Local HART® Handheld.

4.5 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 is afixed to 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 2.5mm wire. Wire insulation must be stripped 5/16 (0.312) inches or 8mm. Tighten each terminal to a maximum of 4.5 in/lbs. Up to four terminal blocks will be supplied; each will be conigured with 2, 6, 9, or 10 positions.

Two terminal block jumpers are provided to provide an electrical connection without connecting to the Personality Board. Install the jumpers between pins 1 and 2 and between pins 3 and 4 to support multi-node wiring.

For user convenience, a second set of terminals has been provided to eliminate the need for a secondary junction box in multi-node systems. Two terminal block jumpers are provided which enable an electrical connection without connecting 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.

TB-1 Terminal Block

Figure 8. Pluggable terminal block and terminal block jumper

4.6 EC Personality Wiring

Warning

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

mounted to a ixed position. The Remote Sensor Kit is not intended to be used as a hand-held

Figure 9. XNX EC personality board terminal blocks, 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.

Optional Local HART IS Barrier must

be connected to J1

1

2

3

4

+ 5

- 6

EC IS Barrier must be connected to J2

EC Adaptor

Sensor Mounted to

Remote Sensor Kit

Figure 10. EC personality wiring

note:

Refer to control drawing 3000E3159 for installation requirements for EC cells and remote mounting.

4.6.2 XNX EC Sensor Remote Mounting Kit

The remote sensor mounting kit is used to remotely mount the sensor from the transmitter. To remotely mount the sensor, follow the procedure below.

1.Unscrew the weatherproof cover, loosen the retainer locking screw and unscrew the sensor retainer.

2.Remove the sensor by pulling without twisting.

3.Plug the remote sensor cable connector into the bottom of the transmitter and secure the retainer.

4.Route the cable to the location where the remote sensor is to be mounted.

5.Optional: make a loop of cable at the junction box. This will provide some slack for any future re-terminations.

6.Mount the remote sensor junction box. Allow enough room below it to it the sensor and the weatherproof cover.

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

8.Fit the sensor retainer, tighten the locking screw and it the weatherproof cover.

9.Calibrate the detector following the procedures in Section 8.1 - Calibration.

Connections

Pin # Color

1Yellow

2Green

3Blue

4White

5Red

6 Black

Figure 12. Installing remote sensor mounting kit

4.7 mV Personality Wiring

XNX Universal Transmitter with the mV personality Board allows interface to a number of Honeywell Analytics’ Multi Purpose Detector (MPD) and ield proven

705 and Sensepoint devices.

caution

Check 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.

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 in the table on the following page. Be sure wires for 4-20mA outputs are routed away from sources of noise such as relay wires.

note

The black and red wires f.rom the MPD are not used with the XNX mV Personality Board. Ensure that they are properly isolated from live connections. DO NOT CUT.

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.

XNX mV TB-1

Figure 13. XNX mV personality board wiring

*Internal earth ground; approximately one inch of the black sheath that contains the Sensepoint PPM’s four wires (red, blue, green, silver) must be split to allow the silver grounding wire to reach the internal grounding lugs.

Local HART

IS Barrier

(optional)

HART

Adaptor

Figure 14. mV personality wiring

(Refer to the table on the preceding page for wire colors.)

4.7.1 mV Remote Sensor Mounting

The millivolt (mV) sensor can be mounted remotely from the XNX transmitter.

The distance between the transmitter and the remote sensor must comply with the table below which identiies the proper wire gauges and distances to ensure

proper operation.

*The frequency of zero calibrations may increase due to the changes in wire resistance caused by changing temperatures.

To remotely mount the sensor, follow this procedure:

1.Install a junction box in the desired location. Allow suficient room for installation and calibration of the sensor. (MPD sensors must be installed with the sinter pointing down.)

2.Loosen the retainer locking screw on the transmitter with the supplied hex key.

3.Unscrew the transmitter’s weatherproof cover.

4.Run conduit or cable from one of the transmitter’s available conduit entries to the location of the remote junction box in accordance with local requirements. UL and CSA require a conduit pour itting within 45 cm (18 in.) of each enclosure.

5.Mount the remote sensor junction box. Allow enough room below it to it the sensor and the weatherproof cover.

6.Attach the conduit or cable to the remote junction box. The junction box provides a mounting base for the sensor and contains the associated electronic circuit.

Figure 15. Remote junction boxes

7.Plug the connector into the back of the mV personality board.

8.Install the mV sensor.

9.Terminate wiring at the mV sensor.

10.At the transmitter, pass the wires through the ferrite bead as shown in Figure 16 and terminate the wiring at the pluggable terminal block as shown in Figure 14.

In remote mount MPD conigurations, the three wires from the sensor that connect to the pluggable terminal block must be routed through the supplied ferrite bead (part no. 0060-1051, supplied in the accessory kit), as shown in Figure 16.

lnternal Ground Lug (do not use)

Figure 16. Ferrite bead wiring

11.Verify point-to-point connections before completing the installation and applying power.

12.Calibrate the sensor.

13.Reinstall the weatherproof cover on the transmitter.

Note: Environmental conditions that compromise the IP66 protection provided by the weather proof cover will extend published response times. Safety

protocols or maintenance procedures that consider these environmental conditions are recommended speciic to the installation.

note

The black and red wires from the MPD are not used with the XNX mV personality board. Ensure that they are properly isolated from live connections. DO NOT CUT.

caution

The enclosure of the remotely mounted 705 HT 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 of the Junction Box shall be certiied in type of

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

14.Attach and wire the sensor into the terminal box.

15.Fit the terminal box lid.

16.Fit the sensor retainer, tighten the locking screw and it the weatherproof cover (if required).

17.Calibrate the detector following the procedure in Section 8.1 - Calibration.

Ensure that wiring is adequately protected from mechanical failure in installation. Speciic shorted or open circuit conditions of wiring to the

MPD **I** sensors may result in full scale concentration readings prior to, or preventing the internal diagnostic routines from identifying the external installation fault.

4.8 IR Personality Wiring

The RS-485 digital communication is the primary interface in which the XNX transmitter reads gas concentration and sensor status from the Optima Plus/ Searchline Excel. If RS-485 communication fails, the Optima Plus/Searchline

Excel 4-20mA output becomes the primary source to read gas concentration.

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 20). HA recommends an 8” (203mm) service length for wiring be maintained.

Be sure wires for 4-20mA outputs are routed away from sources of noise such as relay wires 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 20 to set S3 and S4 to the complimentary operating state of the equipment.

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

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.

4.8.1Connecting 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 18). HA recommends an 8” (203mm) 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 18 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 it 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).

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. 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 Figure 17) then tighten the lock nut to the XNX body.

Figure 17. Optima body orientation

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 speciics on remote

installations or contact your Honeywell Analytics representative for more information.

For remote mount installations, the maximum distance between the XNX Universal Transmitter and the Searchpoint Optima Plus unit is 33m (100 ft.), using 18 gauge wire.

Searchpoint Optima Plus or Searchline Excel Wiring Recommendations

When wiring the XNX and the Searchpoint Optima Plus or Searchline Excel for remote applications, the General Recommendations of the ANSI/TIA/EIA-485-A

standard must be adhered to with the following additions:

1.When mounting the Searchline Excel or Searchpoint Optima Plus, run wiring connections between each Excel or Optima and the XNX in a dedicated separate conduit.

2.Use 18 AWG twisted shielded cable for the RS485 connection between Excel or Optima and the XNX. Make sure that the shield of the cable is grounded to earth and XNX ground on one end ONLY.

3.Avoid running wiring near main cables or other high voltage equipment.

4.DO NOT APPLY 120 Ohm terminating resistors. These resistors are not required due to low data rates.

5.HA recommends that Excel or Optima and the XNX be wired to building ground. The system should be grounded at one point only.

instaLLation tip:

Always issue a soft reset after connecting the Optima and XNX for the irst time. The

soft reset is performed by accessing the XNX calibration menu.

note:

When the soft reset is initiated for the Optima IR Sensor, the RS-485 communication will be interrupted temporarily and faults F120 and/or F161 may be observed. RS-485 communication will be re-established

in a few minutes and the faults will be reset automatically in the Non- Latching Mode. The faults must be reset manually in the Latching Mode.