Honeywell XNX XNX-UTAI-MNNNN – no sensor (transmitter body), IR, UL, Aluminium, 3/4" NPT
XNX-UTAI-MNNNN is a Honeywell XNX IR-personality transmitter body, UL / cUL, 4 × 3/4" NPT, LM25 aluminium (painted), Modbus RTU + 4–20 mA HART, no local HART port, no sensor. It is the junction-box electronics for Searchpoint Optima Plus or Searchline Excel—not an MPD catalytic transmitter.
Same sensor, swap enclosure/approval: aluminium XNX-UTAI-MNNNN, 316SS XNX-UTSI-MNNNN, other approval XNX-AMAI-MNNNN. XNX-UTAI-MNNNN · XNX-UTSI-MNNNN · XNX-AMAI-MNNNN
Part-number decode
| Segment | Meaning | This SKU |
|---|---|---|
| XNX | Honeywell XNX universal transmitter | XNX |
| A / U | Approval A=ATEX/IECEx; U=UL/cUL | U |
| M / T | Entry M=M25; T=3/4" NPT | T |
| A / S | Enclosure A=aluminium; S=316SS | A |
| V / I / E | Personality V=mV(MPD); I=IR Optima/Excel; E=EC | I |
| N / R / M / F | Option N=HART only; R=relays; M=Modbus; F=FFB | M |
| N / H | Local HART port N=no; H=yes | N |
| NNN | no sensor (transmitter body) | NNN |
Same sensor, swap enclosure/approval: aluminium XNX-UTAI-MNNNN, 316SS XNX-UTSI-MNNNN, other approval XNX-AMAI-MNNNN.
Technical specifications
| Category | 变送器本体 |
|---|---|
| Personality | IR personality (Searchpoint Optima Plus / Searchline Excel) |
| Sensor / range | no sensor (transmitter body) |
| Target | body / sensor not fitted |
| Principle | personality board only |
| Output | Modbus RTU + 4–20 mA HART |
| Local HART | no local HART port |
| Supply | 16–32 VDC (24 VDC nominal) |
| Enclosure | LM25 aluminium (painted) |
| Entries | 4 × 3/4" NPT |
| Display | Backlit LCD, magnetic-wand menus |
| Ingress | IP66 |
| Approvals | UL / cUL |
| Temperature | −40~+65 ℃ |
| Mass | approx. 2.8 kg |
| Mates with | Searchpoint Optima Plus point IR or Searchline Excel open-path IR |
Why this personality / sensor
Optima Plus (point IR) and Excel (open-path) need the IR personality board and a different wiring/power budget than MPD millivolt heads. Ordering an mV body and hoping to hang Excel later will fail at commissioning. This SKU keeps the transmitter certified while the IR head is specified on its own datasheet.
Personality and replaceable parts
XNX-UTAI-MNNNN uses the IR personality (Searchpoint Optima Plus / Searchline Excel) board and mates with Searchpoint Optima Plus point IR or Searchline Excel open-path IR. This SKU ships without a sensor; order the head by gas. Spares live on product-3991. Do not substitute Sensepoint XCD cartridges on XNX.
Typical applications
Use IR bodies on tank-farm open-path runs, compressor-hall Optima points, and LNG boil-off galleries where the path length or window kit is sized after the transmitter is already on the pipe stand.
Selection contrast
| P/N | Gas | Range | Option | Body |
|---|---|---|---|---|
| XNX-UTSI-MNNNN | body | — | Modbus | 316SS |
| XNX-AMAI-MNNNN | body | — | Modbus | Aluminium |
| XNX-UTAI-NNNNN | body | — | HART | Aluminium |
| XNX-UTAI-RNNNN | body | — | Relays | Aluminium |
| XNX-UTAI-FNNNN | body | — | FFB | Aluminium |
Installation and wiring
Wall-mount XNX-UTAI-MNNNN (LM25 aluminium (painted), approx. 2.8 kg) on a rigid stand sized for that mass. This SKU uses 4 × 3/4" NPT entries—glands must match; do not retap XNX-UTAI-MNNNN. Land XNX-UTAI-MNNNN 4–20 mA HART per the loop drawing; relays/Modbus/FFB exist only on the matching option board. Magnetic-wand menus on the XNX-UTAI-MNNNN lid stay non-intrusive. XNX-UTAI-MNNNN is a body: wall-mount the transmitter first and mate the head after the personality is confirmed—do not buy a configured SKU until the gas is frozen.
FAQ
- Can I add an MPD sensor to XNX-UTAI-MNNNN later?
- XNX-UTAI-MNNNN ships as a transmitter body. mV personalities accept MPD CB1/IV1/IF1/IC1 heads; IR personalities need Optima/Excel; EC personalities need XNX electrochemical cells. Do not mix those three families on this board.
- Is XNX-UTAI-MNNNN a complete gas detector?
- No. XNX-UTAI-MNNNN is electronics and enclosure only. A configured detector has a three-character sensor code such as CB1 instead of NNN.
- When should I swap XNX-UTAI-MNNNN aluminium for 316SS?
- Use XNX-UTAI-MNNNN (aluminium, ~2.8 kg) in inland, painted plant. Coastal, splash and sour-water decks should move to stainless sibling XNX-UTSI-MNNNN.
- Why is XNX-UTAI-MNNNN NPT instead of M25?
- XNX-UTAI-MNNNN is the UL/cUL body and ships 3/4" NPT. Do not tap M25 on this lid—order ATEX sibling XNX-AMAI-MNNNN if metric glands are mandatory.
- Can I retrofit Foundation Fieldbus on XNX-UTAI-MNNNN after it ships?
- No. XNX-UTAI-MNNNN is the Modbus RTU option board. FFB is a different sales option (XNX-UTAI-FNNNN), not a jumper on this lid.
Documents
Honeywell XNX datasheet / manual · On-site XNX selection matrix
Availability and enquiry
Stock is lot-based. If this box is out, jump to 316SS XNX-UTSI-MNNNN or UL XNX-UTAI-MNNNN rather than a dead SKU.