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FBM203D

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Foxboro FBM203D is an eight-channel isolated 4-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.
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Technical specifications for FBM203D

  • Manufacturer:
    Invensys
  • Part Number:
    FBM203D
  • Product Family:
    Foxboro
  • Product Type:
    Eight-Channel Isolated 4-wire RTD Input Module
  • Stock:
    1
  • RTD input channels:
    8, individually isolated
  • Resistance range:
    0 to 320 Ω
  • Supported sensor elements:
    Pt100 or Ni235 at 0°C
  • RTD connection:
    4-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; imbalance not applicable
  • 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
  • Channel isolation:
    Galvanically isolated channel-to-channel and channel-to-ground
  • Power consumption / heat:
    3 W maximum
  • Termination cable:
    Type 4 for RH924EX per the official TA table; verify the exact cable part number because the same PSS physical-specification section also states Type 2
  • 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 FBM203D only for its documented FBM203D 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 FBM203D

Foxboro FBM203D is an eight-channel isolated 4-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.

FBM203D is the functional FBM203D designation; RH927AM is the current module part number; RH924EX 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 FBM203D are confirmed during quotation.

Foxboro FBM203D 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 Pt100 or Ni235 at 0°C elements
  • Keep the 4-wire lead assignment exactly as wired
  • Confirm the 0 to 320 Ω channel range before energizing
  • Use the RH924EX four-wire compression termination assembly with FBM203D
  • Verify the exact cable part number because the official PSS contains conflicting Type 2 and Type 4 references
  • Keep the termination cable within 30 m and confirm the 37-pin connections at both ends
  • 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 Pt100 or Ni235 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 FBM203D is an eight-channel isolated 4-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
FBM203D FBM 203D Foxboro FBM203D Invensys FBM203D Invensys Foxboro FBM203D I/A Series FBM203D
Technical notes
FBM203D uses the RH924EX four-wire compression termination assembly. The official termination-assembly table assigns RH924EX to Type 4 cable, although the same PSS physical-specification section states Type 2. Verify the installed TA and complete cable part number 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 termination assembly and cable should be used with Foxboro FBM203D?
Use the RH924EX four-wire compression termination assembly. The official TA table assigns RH924EX to Type 4 cable, but the same PSS also contains a conflicting Type 2 entry, so verify the exact installed TA and cable part number before replacement.
Can Foxboro FBM203D use the termination assembly from Foxboro FBM203?
No. FBM203D requires the documented RH924EX four-wire termination assembly and Type 2 cable arrangement.
What happens if one sense lead is open on Foxboro FBM203D?
The channel can report a fault or invalid value; inspect all four conductors, TA terminals, cable continuity and channel diagnostics before replacing electronics.
Which sensors can be configured on Foxboro FBM203D?
Use the documented Pt100 or Ni235 element within the 0 to 320 Ω range and ensure the selected conversion curve matches the installed sensor.
What should be checked when Foxboro FBM203D disagrees with a reference thermometer?
Verify sensor immersion and self-heating, element selection, four-wire terminal mapping, connection resistance, calibration points and process gradients.
What records are needed before replacing Foxboro FBM203D?
Save the RH927AM identity, RH924EX TA and Type 2 cable numbers, four-wire terminal map, sensor curves, scaling, filters, alarms and calibration history.
How should Foxboro FBM203D be commissioned?
Apply traceable four-wire resistance standards to every used channel, verify open-lead diagnostics, scaling and alarms, then compare stable live temperatures.

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