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FBM203B

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Foxboro FBM203B is an eight-channel isolated 2- or 3-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.
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Technical specifications for FBM203B

  • Manufacturer:
    Invensys
  • Part Number:
    FBM203B
  • Product Family:
    Foxboro
  • Product Type:
    Eight-Channel Isolated 2- or 3-wire RTD Input Module
  • Stock:
    1
  • RTD input channels:
    8, individually isolated
  • Resistance range:
    0 to 640 Ω
  • Supported sensor elements:
    Pt200 or Ni470 at 0°C
  • RTD connection:
    2- or 3-wire
  • Accuracy:
    ±0.03% of span
  • Temperature coefficient:
    ±50 ppm/°C
  • Sensor excitation:
    0.19 mA nominal
  • Lead resistance:
    Up to 50 Ω per lead
  • Common-mode rejection:
    >125 dB at 50/60 Hz
  • Normal-mode rejection:
    >95 dB at 50/60 Hz
  • Update rate:
    One new analog value every 25 ms
  • Power consumption / heat:
    3 W maximum
  • Termination cable:
    Type 1, up to 30 m
  • Module Fieldbus:
    Redundant 2 Mbps
  • Input power:
    24 VDC +5%, -10%
  • Operating temperature:
    -20 to +70°C
  • Storage temperature:
    -40 to +70°C
  • Relative humidity:
    5 to 95%, noncondensing
  • Contamination class:
    ISA-S71.04 Class G3
  • Dimensions:
    4.5 × 10.2 × 10.4 cm
  • Weight:
    0.284 kg
  • Tariff Code:
    8538900000
  • 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 RTD Selection Termination & Leads Commissioning Application
  • Use FBM203B only for its documented FBM203B function and matched field signal type
  • Confirm the exact module order identity, termination assembly and cable before replacement
  • Preserve channel configuration, field wiring and diagnostics before removing FBM203B

Foxboro FBM203B is an eight-channel isolated 2- or 3-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.

FBM203B is the functional FBM203B designation; RH922UA is the current module part number; RH916XJ / P0917JM / RH924WN is separate termination hardware.

Before replacement, verify the exact label, signal range, termination assembly, cable, channel configuration, field wiring and system compatibility.

Availability, condition, price, and shipping time for FBM203B are confirmed during quotation.

Foxboro FBM203B Manuals, Datasheets, Links

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.

  • Select only the documented Pt200 or Ni470 at 0°C elements
  • Keep the 2- or 3-wire lead assignment exactly as wired
  • Confirm the 0 to 640 Ω channel range before energizing
  • Use the documented RH916XJ / P0917JM / RH924WN termination assembly
  • Retain the Type 1 identity and length
  • Keep shield, return and lead-compensation terminals with the loop record
  • Check several known resistance points on every used channel
  • Verify open-sensor and channel diagnostic behavior
  • Compare restored engineering values and alarms with the saved configuration
  • Isolated Pt200 or Ni470 at 0°C temperature measurement
  • Like-for-like RTD input retrofit with preserved wiring and scaling
  • Multi-point resistance-temperature monitoring requiring channel isolation
Description
Foxboro FBM203B is an eight-channel isolated 2- or 3-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.

It converts the documented field signals into isolated digital values for the I/A Series or EcoStruxure Foxboro DCS control database while reporting channel and module diagnostics.

Before installation, verify the exact order-number relationship, signal range, termination assembly, cable type, field power, grounding, saved configuration and baseplate compatibility.
Alternative Names
FBM203B FBM 203B Foxboro FBM203B Invensys FBM203B Invensys Foxboro FBM203B I/A Series FBM203B
Technical notes
FBM203B identifies the FBM203B 0 to 640 Ω RTD version; its current module part number is RH922UA. Its higher resistance range is not interchangeable with FBM203 or FBM203C database scaling. Confirm sensor element, wire count, TA and cable before replacement.
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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.
Which RTD elements are appropriate for Foxboro FBM203B?
Use the documented Pt200 or Ni470 elements within the 0 to 640 Ω range and configure the exact element curve and wiring method in the project.
Why must Foxboro FBM203B not inherit FBM203 scaling?
FBM203B has a higher resistance range and different supported sensor elements; inherited scaling can produce plausible but incorrect temperatures.
Can Foxboro FBM203B use the existing Type 1 termination cable?
It may be reusable only when its exact part, length, condition, TA connection and shield arrangement match the approved FBM203B installation.
What should be checked if Foxboro FBM203B indicates open sensor?
Inspect RTD and lead continuity, TA terminals, Type 1 cable, wire-mode configuration and channel diagnostics before replacing the electronic module.
How can lead imbalance affect Foxboro FBM203B?
In a three-wire circuit, unequal lead resistance produces measurement offset; check conductor size, connections, corrosion and routing as a matched set.
What information should accompany a Foxboro FBM203B replacement order?
Provide the RH922UA identity, installed TA and cable numbers, sensor types, two- or three-wire configuration, ranges and system software details.
What commissioning test is suitable for Foxboro FBM203B?
Use traceable resistances representing the installed Pt200 or Ni470 range, verify lead compensation and alarms and compare live temperatures before release.

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