Foxboro |FBM228 P0922QS| FOUNDATION Fieldbus Module

Overview

The Foxboro FBM228 is a FOUNDATION Fieldbus Module designed for reliable communication in industrial automation systems. It features multiple isolated H1 Links, allowing for flexible and efficient signal management.

Technical Specifications

• Interface:

  • Four isolated H1 Links

• H1 Bus Characteristics:

  • General:
    Non-redundant multi-drop communications bus operating at 31.25 kbps. Topology is the bus/tree type. Each FBM228 (and associated H1 Link) has its own Link Active Scheduler (LAS).
  • Maximum Allowable Bus Length and Maximum Allowable Spur Length, Single Device per Spur:
    See document AG-181, FOUNDATION™ fieldbus System Engineering Guidelines.
  • Maximum Cable Length, FBM228 to Terminator Assembly:
    30 m (99 ft)
  • Maximum Number of Devices on Fieldbus:
    64 devices per module with a maximum of 16 devices per H1 Link. Maximums also vary according to factors such as the power consumption of each device, the type of cable used, and the use of repeaters. Consult FOUNDATION fieldbus Physical Layer Specifications for details.
  • Maximum Number of Points:
    128 publisher/subscriber block connections and 256 client/server block connections per FBM, 32 publisher/subscriber block connections and 64 client/server block connections per Link. Total capacity is affected by the update period of client/server access to device block parameters and by the configured macrocycle. Update period is separately configured for each block.
  • Configurable Loop Macrocycle:
    A minimum macrocycle time of 200 milliseconds is supported. It is automatically adjusted, if necessary, to achieve a 50% unscheduled time to support client/server communications on the H1 Link.

• Input Voltage Range:

  • 24 V dc +5%, -10%

• Consumption:

  • P0922QS - 5.0 W
  • RH101SF - 3.8 W (maximum)

• Heat Dissipation:

  • P0922QS - 5.0 W
  • RH101SF - 3.8 W (maximum)

• Environmental Specifications:

  • Operating Altitude/Temperature:
    • -300 to +914 m (-1,000 to +3,000 ft)
      • -20 to +70°C (-4 to +158°F)
    • +915 to +3,000 m (+3,000 to +10,000 ft)
      • -20 to +60°C (-4 to +140°F)
    • -300 to +12,000 m (-1,000 to +40,000 ft)
      • -40 to +70°C (-40 to +158°F)
  • Relative Humidity:
    5 to 95% (noncondensing)
  • Contamination:
    Suitable for use in Class G3 (Harsh) environments as defined in ISA Standard S71.04, based on exposure testing according to EIA Standard 364-65, Class III.
  • Vibration:
    7.5 m/s² (0.75 g) from 5 to 500 Hz

• Weight:
  284 g (10 oz) approximate (each module)

• Dimensions:

  • Height:
    102 mm (4 in), 114 mm (4.5 in) including mounting lugs
  • Width:
    45 mm (1.75 in)
  • Depth:
    104 mm (4.11 in)