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FBM203C

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Foxboro FBM203C 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 FBM203C

  • Manufacturer:
    Invensys
  • Part Number:
    FBM203C
  • 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 30 Ω
  • Supported sensor elements:
    Cu10 at 25°C
  • RTD connection:
    2- or 3-wire
  • Accuracy:
    ±0.1% of span
  • Temperature coefficient:
    ±50 ppm/°C
  • Sensor excitation:
    0.54 mA nominal
  • Lead resistance:
    Up to 10 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 FBM203C only for its documented FBM203C 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 FBM203C

Foxboro FBM203C is an eight-channel isolated 2- or 3-wire RTD input module for resistance-temperature measurement in Foxboro DCS systems.

FBM203C is the functional FBM203C designation; RH922UD 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 FBM203C are confirmed during quotation.

Foxboro FBM203C 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 Cu10 at 25°C elements
  • Keep the 2- or 3-wire lead assignment exactly as wired
  • Confirm the 0 to 30 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 Cu10 at 25°C temperature measurement
  • Like-for-like RTD input retrofit with preserved wiring and scaling
  • Multi-point resistance-temperature monitoring requiring channel isolation
Description
Foxboro FBM203C 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
FBM203C FBM 203C Foxboro FBM203C Invensys FBM203C Invensys Foxboro FBM203C I/A Series FBM203C
Technical notes
FBM203C identifies the FBM203C 0 to 30 Ω RTD version; its current module part number is RH922UD. Its copper RTD range and excitation differ from the platinum/nickel versions. 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.
Can Foxboro FBM203C be used with a Pt100 sensor?
No direct substitution should be assumed. FBM203C is the Cu10 version with a 0 to 30 Ω range and different excitation and accuracy characteristics.
Why is lead resistance especially important for Foxboro FBM203C?
Cu10 measurements use a low resistance range, so connector and lead resistance can become a significant part of the reading; maintain balanced three-wire leads where applicable.
What should be checked if Foxboro FBM203C reads high at all temperatures?
Inspect lead and terminal resistance, sensor element selection, two- or three-wire mapping, corrosion, saved scaling and any inappropriate offset.
Which field hardware must match Foxboro FBM203C?
Confirm the documented RH916XJ, P0917JM or RH924WN termination arrangement, correct Type 1 cable and the actual Cu10 field-sensor wiring.
Can Foxboro FBM203C reuse a configuration from Foxboro FBM203B?
No. The sensor curve, resistance range, excitation, accuracy expectation and conversion settings differ and must be configured specifically for FBM203C.
What evidence should be saved before removing Foxboro FBM203C?
Record the RH922UD label, TA and cable identities, Cu10 wiring, lead values, channel scaling, filters, alarms, offsets and diagnostic state.
How should Foxboro FBM203C be tested after replacement?
Apply traceable low-resistance standards across the working range, verify lead compensation and zero stability, then compare live Cu10 measurements and alarms.