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Xnx universal transmitter manual
Keep the assembly tightly closed during operation. The period until fault indication is 10 seconds. The measured value may decrease even though high levels of toxic gas are still present.
If such conditions can occur, set the control unit to latch at overrange. In standalone operation, set alarms to latching. Cautions: Identify hazardous or unsafe practices which could result in damage to property or to the product. Honeywell Analytics assumes no responsibility for equipment that is not installed and used following the procedures in the Technical Manual. The reader of this manual should ensure that the appropriate equipment has been installed. If in doubt, contact Honeywell Analytics.
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 its 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 its documents.
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. The XNX Universal Transmitter is a comprehensive gas detection system designed to operate in hazardous locations 1 and utilize multiple sensor technologies, catalytic bead, electrochemical.
EC , or infrared IR to detect toxic gases, flammable gases, and oxygen depletion gas hazards. Each technology has a dedicated personality board. Catalytic bead technology is used with the XNX mV personality board. Catalytic bead sensors respond to a wide variety of combustibles so are typically used for flammable gas detection. Electrochemical technology is used with the XNX electrochemical board. EC sensors measure toxic gases in low concentrations. It is also initiated on power up or sensor exchange.
In the event of a cell failing this test, a sensor fault code is displayed. See Section 1. IR sensors optically absorb gases that fall into the infrared spectrum.
For additional information about any of the three sensor types, refer to the applicable data sheet for the supported sensor in Figure 1. A toxic gas hazard is one in which there is a risk of poisoning e.
An asphyxiant hazard would include a risk of suffocation through oxygen deficiency. Oxygen can be consumed or displaced by another gas.
The XNX Universal Transmitter relies on mA output, refreshed at least every two seconds once per second is typical , in which the output is proportional to the gas concentration. Source 3-Wire or Isolated 4-Wire electrical interface based on installation requirements. The 20mA current loop output provides an analog indication of special states, a proportional output to gas concentration and over range indication per the table below.
In the event of a simultaneous alarm and fault, an alarm condition will always override a warning state. Additional optional communication interfaces are available: relay communication, Modbus, or Foundation Fieldbus. Each communication option has a dedicated option board. For additional information, refer to Section 1. HART, Modbus, or Foundation Fieldbus protocols can be used only for data collection or record keeping with regards to combustible gas.
The EC cartridge 2 and. See Section 6. Intrinsically Safe IS Barrier for. A 5-coat marine finishing process provides the highest degree of corrosion protection. For more information on performance specifications, see Section 6 - Specifications.
The number of stopping plugs varies among available configurations. Caution: The stopping plugs are for use only with the XNX Transmitter and should not be used with any other device. The transmitter cover is supplied in the identical material specified for the enclosure.
Cover Lock Screw, requires a 2mm hex key included. This allows for nonintrusive setup and operation. A locking screw integrated into the cover provides positive locking that can be removed by using the supplied 2mm hex key 3. Note: When attaching the cover or stopping plugs, coat the threads to prevent corrosion.
The POD P ersonality, O ptions, and D isplay encloses circuit boards for the personality module, optional interfaces, and display. The personality module, or circuit board, determines the transmitter behavior based on the sensor type attached to the transmitter electrochemical cell, catalytic bead sensor, or. Connection to the attached sensor is made through the sensor connector accessed via a slot in the POD housing.
The optional communication boards vary depending on the option selected when ordered. Only one of the three available interface options relays, Modbus, or Foundation Fieldbus can be attached to the XNX transmitter. An intrinsically safe IS barrier inside the transmitter gives the user full control using a hand-held interrogator for programming and configuration. A remote reset input is provided TB4.
The XNX transmitter has three relays: relay 1 is for alarm level 1, relay 2 is for alarm level 2, and relay 3 is for faults and special. Two alarm levels can be set, allowing, for example, a level 1 alarm for the immediate area when a certain gas concentration is detected and a plant-wide level 2 alarm when a greater gas concentration is detected.
The maximum refresh rate of the relays is 2 seconds. See Set Alarm Values for more information. The kit includes the pipe mount bracket, two carriage bolts, nuts, and lock washers. For more information, see the Modbus Protocol Manual. Connections to the XNX are made through a pluggable terminal block on the Modbus interface circuit board. Foundation Fieldbus is a digital communication system which supports several types of messages. Unlike many traditional systems which require a set of wires for each device, multiple Foundation Fieldbus devices can be connected with a.
Foundation Fieldbus overcomes some of the disadvantages of proprietary networks by providing a standardized network for connecting systems and devices. The calibration gas flow adapter is used to apply calibration test gas to the sensor. It attaches to the bottom of the sensor and can be fitted without removing the weatherproof cover.
Section 3 - Calibration for further details on gas calibration. The XNX Transmitter uses magnetic switches to enable nonintrusive operation. To activate a magnetic switch, hold the magnetic end of the screwdriver up to the glass window and slowly swipe the magnet directly over the shaded area. A decal illustrating the proper method for actuating the magnetic switches is placed on the POD of each transmitter. The switch is actuated by the flux lines between the poles of the magnet. This actuation method provides the most consistent response.
A visual indication of the switch actuation will appear in the lower right corner of the XNX display each time the switch is activated. In some menus where displayed values 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. The Normal Operating Mode icon indicates proper operation. The XNX display also shows the concentration level of the target gas in two ways. In the first, a numeric value is shown in the upper right corner of the display in the units selected ppm,. 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 Section 2. When a warning is triggered, the warning icon appears and information is displayed on the General Status Screen. The information displayed alternates between screens displaying the gas concentration and the warning code. If the Fault icon is displayed, a fault condition has been triggered and the display will alternate between the target gas concentration and the fault code. 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 the alarm level exceeded. In an over range condition, the alarm icon will display and the target gas concentration bar graph and alarm setpoints will flash. Concentration Bar, Alarm Setpoints Flash. See zero deviation in Section 6. In addition to the graphic alarm, fault, and warning indicators, the LEDs on the front panel flash in these patterns based on the condition:. Swiping the magnet over the magnetic switch or allows the user to reset faults or alarms, display current settings, or make adjustments to the device.
Note: If the Easy Reset option is set to Lock, alarms and faults cannot be reset without logging in or entering a passcode. For more information, see Section 2.
The switch resets all alarms and faults and returns to the General Status Screen. Use the switch to return to the General Status Screen without resetting the alarms and faults. Two authorization levels control access based upon the security level of the user: Level 1 routine maintenance and Level 2.
If desired, the Easy Reset from Main Status option allows alarm and fault resets without requiring access to either security level. When the Passcode Screen is displayed, the first passcode digit is highlighted. Use the switches to increment or decrement through the values. Once the correct value is displayed for the first digit, accepts the value and moves to the next digit or moves to the previous digit of 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. While in the General Status display, swipe the magnet over the magnetic switch to display information about the transmitter. Once the proper passcode has been entered, the transmitter displays the Main Menu. Information Mode. Transmitter ID, Serial , Revision.
Transmitter Data Transmitter Status. Sensor Type, Serial , Revision. Sensor Data Sensor Status. Gas Name, ID, Range. Range Settings, Alarm Settings. Relay Settings 5 Relay Settings.
Fieldbus Settings 6. Event History. Change Meas. Units Set Calibration Interval. Set Beam Block Fieldbus Options Caution: Locate transmitters and sensors in accordance with relevant local and national legiislation, standards, and codes of practice.
The placement of sensors 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, and safety and engineering personnel. The agreement reached on the location of sensors should be recorded. Consider these factors when locating gas sensors:. The transmitter can be mounted in a number of ways using the integral mounting tabs.
A ceiling mount bracket kit A is also available. Note: Agency certifications require that EC and mV sensors face down. Optima sensors must be mounted horizontally. Warning: When the transmitter is equipped with the optional Remote Mount Kit, the remote sensor must be securely mounted in a fixed position.
Figure 25 provides the guidelines to proper installation of the XNX. The XNX transmitter is available in sensor technologies, or personality options, which support a variety of sensors and applications. Each of the personalities use dedicated interface boards. Pluggable terminal blocks are used for easy connection and service. The personality boards and optional communication interfaces are enclosed in plastic housings comprising the electronics POD P ersonality, O ptions, and D isplay.
This table illustrates the three XNX transmitter configurations and the sensors each support. Caution: Before wiring the transmitter, confirm that the correct personality and communication boards are installed. 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.
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.
When wiring for DC power, mA signal, remote wiring to sensors must be sized sufficiently to provide adequate voltages for the line length and the loads that will be used.
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. The use of high inrush or inductive loads may affect the performance of the transmitter. For best reliability use resistive loads only. This is the simplest type of installation.
It consists of a single XNX transmitter installation per power source. Providing power to the transmitter is the factor that will determine the maximum distance of the installation. The mA output signal will easily handle the distance back to the control. This is two or more transmitters sharing a single power source with each transmitter having its own dedicated wiring to the power source. Ensure that the Flow Adaptor is fitted with its gasket.
Apply a thin coating of anti-seize compound, such as light petroleum grease, to the sensor accessory thread. Set the sample flow rate to 0. Maintenance General Maintenance consists of cleaning the sensor and accessories, replacing gasket and the Hydrophobic Barrier and gassing the sensor when testing the system. In the event of exposure to contaminant or prolonged exposure to high concentration of gas, the sensor should be operated for 24 hours in a clean environment and then recalibrated.
Cleaning Sensor and accessories may be cleaned using an industrial grade of methanol, providing the appropriate safety precautions are taken when handling this solvent. Sensor Cell Replacement: Using Figure 8 as a guide, follow the procedure below: Check that the label on the new sensor cell is the correct gas type. XNX supporta rilevatori di gas elettrochimici, a infrarossi e filamenti catalitici e utilizza HART e cablaggio standard da mA le opzioni includono Modbus, Fieldbus in attesa di definizione fino a tre rel e un adattatore Hart locale per la configurazione e la diagnostica utilizzando i dispositivi palmari HART esistenti.
Honeywell XNX transmitter for gas detection supports catalytic bead, electrochemical cell and infrared sensors on a common platform. Honeywell XNX Universal TransmitterSupports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs saving customers time and money.
With unique configurations, XNX satisfies Class 1Class 2 intrinsically safe, explosion-proof requirements in upstreamdownstream oil, chemical, wastewater and other industries. The Honeywell XNX's advantage comes from a simple-to-use, low-maintenance universal platform that works with other safety equipment on a digital bus system, including Honeywell Analytics own Searchline Excel, Optima or other gas detectors, industry standard.
Each technology has a dedicated personality board. Relay Output. Ability to adapt configuration as site needs change. Question Problem. It can also be configured to provide many industry standard output signals. Brand Honeywell. Expand search. Refer to the XNX Universal Transmitter Resource CD Honeywell part number for these comprehensive documents, as appropriate, before installing or commissioning the transmitter Manuals.
Con oltre Choice of all industry standard output signals. Honeywell XNX Universal Transmitter for Electrochemical input compatible with any gas concentration ToxicOxygen sensor, with aluminum alloy LM25 housing Honeywell manufactures a full and comprehensive range of gas detection products dedicated to all types of industrial facilities, from smaller boiler rooms to large petrochemical plants and oil refineries It can also.
Xnx 2. Product Details. Product No. Created by Steven Sanchez. Compatible with all Honeywell Analytics gas sensors. We Also Recommend.
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