Honeywell XNX Universal Transmitter Gas Detector

XNX Universal Transmitter is a Honeywell universal gas transmitter compatible with all Honeywell Analytics gas sensor technologies: catalytic, point infrared, open path infrared and electrochemical. 4-20 mA with HART is standard, with relay, Modbus RTU or Foundation Fieldbus options; aluminium or 316 stainless steel housing, IP66, ATEX, IECEx, UL and CSA approvals and an SIL 2 assessment to IEC 61508.

How does the XNX Universal Transmitter differ from the individual XNX codes?

This page describes the whole XNX transmitter range and all of its order codes. XNX-AMSV-NNCB1, XNX-AMSV-NHCB1, XNX-AMAV-NNCB1 and XNX-AMAV-NHCB1 are four mV configurations supplied with an MPD catalytic sensor, each with its own page; XNXXSO1SS is the oxygen sensor for the EC configuration.

The three XNX configurations

The POD (Personality, Options and Display) sets the transmitter behaviour from the sensor type attached and the selected output options.

XNX Universal Transmitter specifications

• Type: Universal gas transmitter for Honeywell Analytics flammable, toxic and oxygen gas sensors (local or remote)
• Configurations (personalities): mV, EC (electrochemical) or IR (infrared), depending on the sensor fitted
• Standard output: 4-20 mA + HART (HART 6.0), selectable sink, source or isolated; accuracy ±1 % of full scale
• Relay option: 3 configurable relays (2 x SPCO alarm, 1 x SPCO fault), max 240 VAC 5 A (non-inductive); mutually exclusive with Modbus / Foundation Fieldbus
• Modbus option: Modbus RTU, isolated RS485, 1200 to 19.2K baud, up to 254 XNX transmitters
• Foundation Fieldbus option: Multi-drop H1 network, IEC 1158-2 / ISA 50.02, 31.25 Kbit/s, up to 32 nodes
• Local HART port (optional): Externally accessible IS port for hot connection of an HC275/375 HART hand-held configurator or equivalent, cover rated IP66/67
• Housing: 5-coat marine finish painted aluminium alloy or 316 stainless steel
• Cable entries: 5 entries (2 right, 2 left, 1 bottom): M25 for ATEX/IECEx versions, ¾” NPT for UL/CSA versions
• Ingress protection: IP66 (EN 60529:1992), NEMA 4X
• Operating temperature: -40°C to +65°C
• Operating humidity: 0-99 %RH, non-condensing
• Supply voltage: EC and mV versions: 16 to 32 Vdc; IR version: 18 to 32 Vdc (24 Vdc nominal)
• Maximum power: XNX EC: 6.2 W; XNX mV: 6.5 W; XNX IR with Searchpoint Optima Plus: 9.7 W; XNX IR with Searchline Excel receiver: 13.2 W
• Weight: Aluminium alloy: 2.8 kg; 316 stainless steel: 5 kg
• Dimensions: 160 x 197 x 114 mm
• Display: Backlit multilingual LCD (text, bar graph, digits and icons); configured with magnetic switches without opening the unit
• Certification: ATEX: II 2 (1) G Ex d [ia IIC Ga] IIC T4/T6 Gb; II 2 (1) D Ex tb [ia IIIC Da] IIIC T85 Db. IECEx: Ex d [ia IIC Ga] IIC T4/T6 Gb; Ex tb [ia IIIC Da] IIIC T85 Db. UL: Class I, Div 1, Groups A, B, C, D; Class II, Div 1 Groups F & G; Class I, Zone 1 Groups IIB + H2; Class II, Zone 20 & 21. CSA: Class I, Div 1, Groups B, C, D; Class II, Div 1 Groups F & G; Class I, Zone 1 Groups IIB + H2
• Performance standards: SIL assessment to IEC 61508 (SIL 2); EN 45544, EN 50104, EN 50271:2010, EN 13980, EN 60079-29-1; UL 913, UL 1203, CSA 22.2 No. 152; IECEx OD 005

How to read the order code

According to the ordering diagram in the datasheet, the code is built from: approval (A: ATEX/IEC, U: UL-CSA), entry type (M: M25, T: ¾” NPT), material (A: aluminium, S: 316 stainless steel), personality (mV, EC, IR), output option (N: none, R: relay, M: Modbus, F: Foundation Fieldbus), local HART (N: none, H: local HART) and sensor and range (NNN: none, CB1: catalytic bead, IF1: IR hydrocarbons 0-100 %LEL propane, IV1: IR methane 0-100 %LEL or 0-5 %Vol, IC1: IR carbon dioxide 0-5 %Vol). Certain combinations are not available, for example ATEX with ¾” NPT entries.

Order codes

Applications

The Honeywell datasheet lists these typical applications: offshore oil and gas production platforms, oil and gas exploration and drilling, refineries, chemical and petrochemical plants, onshore oil and gas terminals, gas transmission, power stations.