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333U

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Emerson Rosemount 333U is a high-alarm HART Tri-Loop converter that can provide up to three analog outputs from one multivariable HART signal.
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Technical specifications for 333U

  • Manufacturer:
    Emerson
  • Part Number:
    333U
  • Product Family:
    Rosemount
  • Product Type:
    Rosemount HART Tri-Loop Signal Converter
  • Stock:
    1
  • Manufacturer:
    Emerson Rosemount
  • Model:
    333U
  • Part number:
    03095-0810-0001
  • Product role:
    HART-to-analog signal converter
  • Configuration:
    High alarm
  • Analog outputs:
    Up to 3
  • Terminal voltage:
    11 to 42.4 Vdc
  • Mounting:
    DIN rail
  • Weight:
    0.12 kg
  • Estimated shipping dimensions:
    4x7.9x8.55cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Selection Installation Service Checks Applications

Features:

  • Signal expansion: Converts selected digital HART variables into separate analog output channels.
  • Channel mapping: Keeps each variable, range and receiving input documented as an independent loop.
  • Alarm identity: Uses the 333U high-alarm ordering configuration represented by part 03095-0810-0001.
333U is used when a multivariable HART device must feed more than one conventional analog input in the control or monitoring system.

Each output channel is its own measurement path, so the assigned variable, engineering range, polarity and host scaling must be proved separately during commissioning.

Keeping the 333U alarm code and part number with the channel map helps prevent a replacement from changing the intended failure response or sending the right variable to the wrong input.

Apter Power supports exact-model document review, quotation, and procurement for the Emerson 333U Rosemount HART Tri-Loop Signal Converter.
Emerson 333U Rosemount HART Tri-Loop Signal Converter Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Source device: verify compatible HART variables and multidrop or point-to-point arrangement.
  • Alarm direction: retain the 333U high-alarm ordering code.
  • Outputs: define variable, range, engineering units, and receiving input for each channel.
  • Power: verify 11 to 42.4 Vdc at the terminals under load.
  • Wiring: document polarity, HART connection, analog outputs, shielding, and grounding.
  • Mounting: provide DIN-rail clearance and keep signal wiring separated from noise sources.
  • Channel test: simulate or drive each HART variable and confirm the corresponding analog output.
  • Alarm test: prove the configured high-alarm behavior through the receiving system.
  • Record: retain model, part number, variable map, ranges, loop readings, and host scaling.
  • Multivariable transmitters: separate HART variables for legacy analog inputs.
  • Monitoring: independent trend or alarm channels from one field device.
  • Retrofit: bridge a HART-capable instrument to existing 4-20 mA infrastructure.
Description
In a multivariable instrument loop, 333U converts selected HART variables into as many as three independent analog outputs for conventional control, indication or alarm inputs. This allows one field device to supply separate measured values without requiring every receiving system to interpret HART data.

During commissioning, 333U should be treated as several linked but independent signal paths. A correct reading on one output does not confirm the variable assignment, range, polarity or host scaling of the other channels.

For replacement, 333U should remain tied to the high-alarm configuration and part number 03095-0810-0001. Retaining the HART source identity and complete channel map prevents a spare from changing the process response while appearing electrically functional.
Alternative Names
Rosemount 333U Emerson Rosemount 333U 03095-0810-0001
Technical notes
For 333U, isolate or place affected loops in a safe maintenance state before wiring changes. Match part 03095-0810-0001, confirm the high-alarm configuration, 11 to 42.4 Vdc supply, HART variable mapping, channel scaling, polarity, grounding, and host alarms; stop if the process response or alarm direction is not documented.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
A 333U replacement is available, but its alarm direction is not shown on the paperwork. Can it be installed?
No. Verify the 333U high-alarm identity and part number 03095-0810-0001 before installation because alarm direction is part of the required process response.
One 333U output is correct while a second channel is scaled incorrectly. Where should diagnosis begin?
Check that channel’s assigned HART variable, range, units, polarity, loop resistance and receiving-input scaling before changing the converter.
The HART transmitter communicates normally, but none of the 333U analog outputs respond. What should be checked?
Verify terminal voltage under load, HART topology and source-device identity, then confirm that each required variable is available and mapped to an enabled output.
Can the three 333U outputs be assigned by copying the same range to every channel?
Only if the approved design intentionally uses identical ranges. Each channel should be documented from its assigned variable through to the receiving input and engineering-unit scaling.
What process precaution is required before opening a loop connected through 333U?
Place every affected control and alarm loop in the approved maintenance state, communicate the impairment and verify safe process conditions before disconnecting wiring.
What evidence should be recorded after 333U commissioning?
Retain the exact model and part number, supply voltage, HART device identity, channel-to-variable map, ranges, measured outputs, alarm test and restored host-system status.