XNX-ASMSI-RHNNN - Honeywell Universal Transmitter

XNX-ASMSI-RHNNN Universal Transmitter by Honeywell

Key Technical Specifications

• Brand: Honeywell – a global leader in industrial safety and sensing.
• Model: XNX-ASMSI-RHNNN – part of the XNX Universal Transmitter family.
• Output: HART® protocol over 4-20mA analog loop for stable signal transmission.
• Approval: ATEX/IEC certified (Approval A) for Zone 1 and Zone 2 hazardous areas.
• Enclosure: 316 stainless steel (Material S) with 5 x M25 cable entries (Entry M).
• Sensor Interface: mV version (Personality V) for milli-Volt sensors like MPD and Sensepoint.
• Sensor Type: Electrochemical H2S sensor (Range RHNNN) for toxic gas detection.
• Options: No relay (R=No), no local HART (N=No), no additional options (N=No).
• Shipping Weight: 3.0 kg – lightweight for easy handling and mounting.
• Operating Temperature: -20°C to +55°C for reliable indoor and outdoor use.
• Measurement Range: 0-100 ppm H2S (default) with 0.1 ppm resolution.
• Linearity: ±2% of full scale for accurate and repeatable readings.
• Response Time: T90 < 25 seconds for rapid toxic gas alerts.
• EMC Immunity: Complies with EN 61000-6-2 and EN 61000-6-4 standards.

Frequently Asked Questions (FAQ)

• Is this transmitter compatible with 3-wire electrochemical sensors? Yes, the mV interface (Personality V) supports standard 3-wire electrochemical sensors.
• Can I use this transmitter with a different gas sensor? The RHNNN range is factory-set for H2S. For other gases, please contact Honeywell for alternative configurations.
• What is the maximum cable length for the 4-20mA output? With HART®, we recommend up to 1000 meters using shielded twisted-pair cable.
• Does this unit include a relay output? No, this model (Option R=No) does not include a relay. Please choose the R option for relay functionality.
• What is the ambient humidity tolerance? It operates from 0 to 95% RH non-condensing.
• How do I perform a zero adjustment for the H2S sensor? Use the magnetic switch or HART® communicator to initiate zero calibration in fresh air.
• Is this unit SIL rated? The XNX-ASMSI-RHNNN meets SIL 2 requirements for functional safety applications.

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