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FBM246

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Foxboro FBM246 is a redundant eight-channel dual-baud FoxCom intelligent-device communication module for Foxboro DCS.
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Technical specifications for FBM246

  • Manufacturer:
    Invensys
  • Part Number:
    FBM246
  • Product Family:
    Foxboro
  • Product Type:
    Redundant Eight-Channel FoxCom Intelligent Device Module
  • Stock:
    1
  • Channel interface:
    8 isolated FoxCom communication channels
  • Selectable baud rate:
    600 or 4,800 baud per channel
  • Message rate:
    10 messages/s at 4,800 baud; 2 messages/s at 600 baud
  • Maximum distance:
    600 m at 4,800 baud; 1,800 m at 600 baud
  • Compliance voltage:
    19 VDC minimum at 20.5 mA
  • Maximum loop resistance:
    400 Ω with IS barrier; 330 Ω without IS barrier
  • Field-device internal power:
    23.1 to 25.3 VDC; 200 Ω source resistance
  • Isolation test:
    600 VAC for one minute
  • Pair power consumption:
    10 W maximum
  • Pair heat dissipation:
    6 W maximum
  • Input power:
    24 VDC +5%, -10%
  • Module Fieldbus:
    Redundant 2 Mbps
  • 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:
    10.2 × 4.5 × 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 FoxCom Links Loop Limits Redundancy Application
  • Use FBM246 only for the documented FBM246 channel function
  • Confirm the electronic-module order number, termination hardware and cable before replacement
  • Preserve field wiring, channel configuration, diagnostics and redundancy state before removal

FBM246 is a Foxboro redundant eight-channel foxcom intelligent device module designed for Foxboro DCS 200 Series field I/O.

Foxboro FBM246 is a redundant eight-channel dual-baud FoxCom intelligent-device communication module for Foxboro DCS. The official document styles the function as FBM246; RH917XN is the current exact module part number and supersedes P0917XN.

Before installation or replacement, verify the complete nameplate, companion hardware, termination assembly, cable, signal limits, field wiring, saved configuration and supported system environment.

Availability, condition, price, and shipping time for FBM246 are confirmed during quotation.

Foxboro FBM246 Redundant Eight-Channel FoxCom Intelligent Device Module 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.

  • Configure each channel independently for 600 or 4,800 baud
  • Use point-to-point master/slave half-duplex communication
  • Verify CCITT CRC communication and device identity on every channel
  • Keep cable distance within the baud-rate-specific maximum
  • Calculate total loop resistance with or without an IS barrier
  • Check 19 VDC compliance at 20.5 mA and field-device voltage demand
  • Install the documented redundant module pair and adapter
  • Preserve per-channel baud rate, device records and baseplate positions
  • Prove communication continuity and diagnostics during approved transfer
  • Digital communication with Foxboro intelligent pressure transmitters
  • FoxCom communication with intelligent temperature, flow and level transmitters
  • Redundant dual-baud intelligent field-device integration in Foxboro DCS
Description
FBM246 is a Foxboro redundant eight-channel foxcom intelligent device module for the Foxboro DCS 200 Series I/O platform.

Foxboro FBM246 is a redundant eight-channel dual-baud FoxCom intelligent-device communication module for Foxboro DCS. Its documented channel architecture and electrical limits define the supported field interface.

Before installation or replacement, confirm the complete FBM246 identity, module part number, compatible termination hardware, cable, field power, wiring, saved configuration and control-system requirements.
Alternative Names
FBM246 FBM 246 Foxboro FBM246 Foxboro Evo FBM246 Invensys Foxboro FBM246 I/A Series FBM246 RH917XN FBM246 RH917XN P0917XN FBM246 P0917XN
Technical notes
FBM246/RH917XN is the FBM246 redundant FoxCom module; P0917XN is its documented superseded module number. Keep redundant adapter and TA numbers separate.
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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.
When is FBM246 a better fit than FBM246B for a FoxCom project?
Choose FBM246 when the approved design requires the module channels to serve FoxCom intelligent devices rather than a mixed FoxCom and analog-output arrangement. Confirm the termination hardware and database before selection.
Can an RH917XN module be paired with a legacy P0917XN in an FBM246 redundant set?
P0917XN is the documented superseded module number, but pairing should still be checked against both labels, system release, adapter, termination hardware, project records and partner compatibility.
Why can an FBM246 device communicate at one saved speed but fail after changing or restoring the channel setting?
Review cable length and quality, loop resistance, barrier effects, field-device power, shielding, grounding, noise and whether the device and database use the same communication setting.
Why can all FoxCom devices drop offline after replacing only one FBM246 module?
Check partner synchronization, Module Fieldbus paths, redundant adapter, termination assembly, power, common cable connections, downloaded configuration and alarms generated during the replacement.
What causes intermittent CRC errors or repeated device reconnects on FBM246?
Investigate shielding and grounding, cable routing, loose terminals, barrier voltage drop, field power stability, device addressing, electrical noise and channel-level communication diagnostics.
What evidence should be collected before requesting support for an FBM246 communication problem?
Provide both module labels, partner state, adapter and termination identities, affected device tags, channel settings, barrier and cable details, diagnostic messages and timestamps for the dropouts.
How can FBM246 redundancy be proven without unnecessarily interrupting device communication?
Establish a clean communication baseline, confirm a synchronized healthy partner, perform an approved transfer while monitoring every device and alarm, then verify recovery and restored roles.

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