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FBM212

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Foxboro FBM212 is a 14-channel group-isolated thermocouple and millivolt input module with an internal reference-junction channel for Foxboro DCS temperature measurement.
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Technical specifications for FBM212

  • Manufacturer:
    Invensys
  • Part Number:
    FBM212
  • Product Family:
    Foxboro
  • Product Type:
    14-Channel Group-Isolated Thermocouple/mV Input Module
  • Stock:
    1
  • Field input channels:
    14 differential thermocouple or millivolt channels
  • Reference-junction channel:
    Channel 15, internal to the termination assembly and not user-accessible
  • Supported thermocouples:
    B, E, J, K, N, R, S and T; ungrounded junctions only
  • Millivolt input range:
    -10.5 to +69.5 mV
  • Raw measurement span:
    71.419 mV represented by 65,535 counts
  • Millivolt accuracy:
    ±0.03% of span (±27 µV) at 25°C
  • Reference RTD:
    Three-wire 100 Ω platinum RTD, IEC 751 Class B
  • Reference-junction conformity:
    ±0.25°C
  • Reference-junction measurement accuracy:
    ±0.50°C
  • Input impedance:
    10 MΩ
  • Common-mode voltage:
    ±2.5 VDC or peak AC
  • Isolation test:
    600 VAC for one minute to ground
  • Power consumption:
    3 W maximum
  • 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
  • Conversion / new readings:
    Configurable conversion; new readings every 500 ms
  • Termination assembly:
    RH916BV
  • Heat dissipation:
    3 W maximum
  • Operating altitude:
    -300 to +3,000 m
  • Storage altitude:
    -300 to +12,000 m
  • Vibration:
    0.75 g from 5 to 500 Hz
  • 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 Sensor Selection Reference Junction Temperature Validation Application
  • Confirm the installed FBM212 thermocouple or millivolt channel configuration before replacement
  • Confirm the exact module identity, termination hardware and cable before replacement
  • Preserve field wiring, channel configuration, diagnostics and control state before removal

Foxboro FBM212 is a 14-channel group-isolated thermocouple and millivolt input module with an internal reference-junction channel for Foxboro DCS temperature measurement.

FBM212 is the functional designation; RH914XL is the current module part number; RH916BV is the termination assembly containing the internal reference-junction RTD.

Before replacement, verify the exact label, termination hardware, cable, signal limits, field wiring, saved configuration and supported system environment.

Availability, condition, price, and shipping time for FBM212 are confirmed during quotation.

Foxboro FBM212 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.

  • Use only documented thermocouple types or sources within the millivolt range
  • Use ungrounded thermocouple junctions for FBM212
  • Keep channel common-mode voltage within ±2.5 VDC or peak AC
  • Use the documented RH916BV termination assembly
  • Verify the internal three-wire 100 ohm platinum RTD on channel 15
  • Inspect terminal temperature and thermocouple alloy before trimming readings
  • Inject traceable low-level references at the field terminals
  • Verify thermocouple type, polarity and cold-junction compensation
  • Confirm the 500 ms update behavior, alarms and diagnostics
  • Ungrounded thermocouple temperature acquisition
  • Low-level millivolt signal measurement
  • Multichannel temperature measurement with termination-assembly cold-junction compensation
Description
Foxboro FBM212 is a 14-channel group-isolated thermocouple and millivolt input module with an internal reference-junction channel for Foxboro DCS temperature measurement.

Its documented channel architecture, signal limits and diagnostics support model-specific Foxboro DCS field I/O service without changing the official identity of FBM212.

Before installation, verify the complete nameplate, order-number relationship, termination hardware, cable, field power, saved configuration, grounding and system compatibility.
Alternative Names
FBM212 FBM 212 Foxboro FBM212 Invensys FBM212 Invensys Foxboro FBM212 I/A Series FBM212 Foxboro FBM 212
Technical notes
FBM212 is a 14-channel thermocouple/mV input module; RH914XL is the module part number and RH916BV is its termination assembly with reference-junction RTD. Verify the module, termination assembly, thermocouple wiring, 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.
Does FBM212 provide 15 user-accessible field input channels?
No. FBM212 provides 14 differential field input channels. Channel 15 is reserved for the internal reference-junction RTD in the RH916BV termination assembly and is not available as a user field input.
Which thermocouple and millivolt signals are compatible with FBM212?
FBM212 supports ungrounded Type B, E, J, K, N, R, S and T thermocouples. It also accepts low-level millivolt signals from -10.5 to +69.5 mV.
Can grounded thermocouples be connected to FBM212?
No. FBM212 is specified for ungrounded thermocouple junctions. Applications using grounded thermocouples require a suitable individually isolated input module, such as the documented FBM202 solution, after verifying the complete system design.
Are the 14 field input channels on FBM212 individually isolated?
No. The FBM212 field inputs are group-isolated from ground and module logic, but they are not galvanically isolated from one another. Common-mode voltage and grounding conditions must therefore be checked across the complete channel group.
Which termination assembly provides cold-junction compensation for FBM212?
The documented RH916BV termination assembly contains a three-wire 100-ohm platinum RTD for reference-junction measurement. FBM212 reads this device through internal channel 15 to perform thermocouple cold-junction compensation.
Why might several FBM212 channels show a similar temperature error?
A common error across several channels can indicate a problem with the RH916BV reference-junction RTD, terminal temperature, thermocouple extension wire, polarity, grounding, common-mode voltage or channel configuration. These shared conditions should be checked before replacing FBM212.
How should FBM212 be commissioned after installation or replacement?
Verify the internal reference-junction reading first. Then apply traceable millivolt or thermocouple references to every used channel and confirm the configured thermocouple type, polarity, engineering range, cold-junction compensation, alarms and diagnostics.

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