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FBM201B

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Foxboro FBM201B is an eight-channel isolated low-level voltage analog input module for Foxboro DCS field measurements.
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Technical specifications for FBM201B

  • Manufacturer:
    Invensys
  • Part Number:
    FBM201B
  • Product Family:
    Foxboro
  • Product Type:
    Eight-Channel Isolated Low-Level Voltage Analog Input Module
  • Stock:
    1
  • Analog input channels:
    8, individually isolated
  • Input range:
    0 to 100 mV DC
  • Input impedance:
    10 MΩ
  • Accuracy:
    ±0.03% of span
  • Temperature coefficient:
    ±50 ppm/°C
  • Common-mode rejection:
    >100 dB at 50/60 Hz
  • Normal-mode rejection:
    >95 dB at 50/60 Hz
  • Isolation test:
    600 VAC for one minute; input safety limits still apply
  • Power consumption:
    7 W maximum
  • Heat dissipation:
    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 Signal Matching Termination Commissioning Application
  • Use FBM201B only for its documented FBM201B 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 FBM201B

Foxboro FBM201B is an eight-channel isolated low-level voltage analog input module for Foxboro DCS field measurements.

FBM201B is the functional FBM201B designation; RH922YH is the current electronic-module part number; RH922ZM 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 FBM201B are confirmed during quotation.

Foxboro FBM201B 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.

  • Match the 0 to 100 mV DC source range before wiring
  • Keep each isolated channel within its permitted common-mode conditions
  • Use traceable references for zero and span checks
  • Use the documented RH922ZM termination assembly
  • Match compression or ring-lug terminals to the installed wiring
  • Keep the Type 1 cable identity and length with the maintenance record
  • Restore channel scaling, alarms and engineering units
  • Check isolation and shield practice before reconnecting field devices
  • Compare module diagnostics with the saved pre-removal state
  • Isolated acquisition of low-level voltage field signals
  • Retrofit of a like-for-like Foxboro DCS input module with preserved scaling
  • Channel-isolated measurements where separate field references must be retained
Description
Foxboro FBM201B is an eight-channel isolated low-level voltage analog input module for Foxboro DCS field measurements.

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
FBM201B FBM 201B Foxboro FBM201B Invensys FBM201B Invensys Foxboro FBM201B I/A Series FBM201B
Technical notes
FBM201B identifies the FBM201B 0 to 100 mV DC input version; its current module part number is RH922YH. It must not be treated as FBM201, FBM201C or FBM201D. Confirm the exact range, TA and Type 1 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 FBM201B be used for thermocouples without a separate transmitter?
Only when the complete thermocouple application has an approved millivolt conversion and cold-junction arrangement. FBM201B is a 0 to 100 mV input version, not a dedicated compensated thermocouple module.
What must match before Foxboro FBM201B replaces an installed low-level input module?
Confirm the RH922YH electronic-module identity, 0 to 100 mV scaling, RH922ZM termination assembly, Type 1 cable, field polarity, shields and saved channel configuration.
Why can Foxboro FBM201B show unstable values on a low-level signal?
Inspect source impedance, shield termination, ground loops, cable routing near switching conductors, loose low-level terminals and any difference between configured and actual signal range.
Can Foxboro FBM201B share a common return between channels?
Do not defeat its channel isolation with an undocumented common. Preserve the original field references and verify the installed grounding design before joining returns.
Which accessories should be confirmed when purchasing Foxboro FBM201B?
Confirm the separate RH922ZM termination assembly, the correct Type 1 termination cable and the terminal style required by the installed baseplate and field wiring.
What records reduce downtime when replacing Foxboro FBM201B?
Save the channel ranges, zero and span values, engineering units, alarm limits, terminal map, shield practice, field references, diagnostics and exact module/TA labels.
How should Foxboro FBM201B be commissioned after installation?
Apply traceable millivolt references at several points on every used channel, then verify polarity, isolation, scaling, alarms and stable live readings under controlled conditions.

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