Foxboro I/A Series FBM211 RH914TN 0 to 20 mA Input Interface Module

OVERVIEW:

The FBM211, 0 to 20 mA Input Interface Module, contains sixteen 20 mA dc analog input channels, each channel accepting a 2-wire analog sensor input such as a 4 to 20 mA transmitter or a self-powered 20 mA source. The input channels are galvanically isolated from ground and module logic. The module performs the signal conversion required to interface the electrical input signals from the field sensors to the redundant module Fieldbus.

FUNCTIONAL SPECIFICATIONS

• Input:

  • 16 group isolated and independent channels
  • Input Range: 0 to 20.4 mA dc (each channel current limited to 33 mA)
  • Accuracy: ±0.03% of span
  • Accuracy Temperature Coefficient: ±50 ppm/°C
  • Input Signal A/D Conversion: Each channel performs A/D signal conversion using a multiplexed Sigma-Delta converter
  • Integration Period: Software configurable
  • Common Mode Rejection: >100 dB at 50 or 60 Hz
  • Normal Mode Rejection: >35 dB at 50 or 60 Hz
  • Input Channel Impedance: 61.9 Ω nominal

• Power Requirements:

  • Input Voltage Range (Redundant): 24 V dc +5%, -10%
  • Consumption:
    • 7 W (maximum) at 24 V dc
    • 11 W (maximum) at 24 V dc with all inputs at 20.4 mA (internal power)
  • Heat Dissipation: 3 W (maximum) at 24 V dc

• Operating Temperature:

  • Module: -20 to +70°C (-4 to +158°F)
  • Termination Assembly (PVC): -20 to +50°C (-4 to +122°F)

• Storage Temperature:

  • -40 to +70°C (-40 to +158°F)

• Relative Humidity:

  • 5 to 95% (noncondensing)

• Altitude:

  • Operating: -300 to +3,000 m (-1,000 to +10,000 ft)
  • Storage: -300 to +12,000 m (-1,000 to +40,000 ft)

• 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:

  • 0.75 m/S2 (5 to 500 Hz)