Xnx Universal Transmitter – Fill Out and Use This PDF

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