Overview

The FBM203 series modules, including FBM203, FBM203b, FBM203c, and FBM203d, are designed to accept RTD (Resistance Temperature Detector) sensor inputs with varying resistance ranges:

• FBM203: Supports 2- or 3-wire RTD sensor inputs with a resistance range of 0 to 320 ohms.
• FBM203b: Supports 2- or 3-wire RTD sensor inputs with a resistance range of 0 to 640 ohms.
• FBM203c: Supports 2- or 3-wire RTD sensor inputs with a resistance range of 0 to 30 ohms.
• FBM203d: Supports 4-wire RTD sensor inputs with a resistance range of 0 to 320 ohms.

Each analog input channel in these modules is galvanically isolated from other channels and from the ground, ensuring signal integrity and safety.

Specifications

• Input Channels (8)

  • Analog Accuracy (Includes Linearity)
    • FBM203/d: ±0.03% of span
    • FBM203b: ±0.03% of span
    • FBM203c: ±0.1% of span
  • Accuracy Temperature Coefficient: ±50 ppm/ºC
  • Input Signal A/D Conversion: Each channel performs its own A/D signal conversion using an independent sigma-delta conversion technique.
  • Integration Period: Software configurable.
  • Common Mode Rejection: >125 dB at 50 or 60 Hz
  • Normal Mode Rejection: >95 dB at 50 or 60 Hz
  • Typical Resistance Temperature Sensors: Platinum (DIN), Platinum (SAMA), Platinum (IEC), or Nickel (SAMA)
  • FBM203c Copper: 10 ohms nominal at 25°C

• Power Requirements

  • Input Voltage Range (Redundant): 24 V dc +5%, -10%
  • Consumption: 3 W (maximum)
  • Heat Dissipation: 3 W (maximum)

• Operating Conditions

  • Temperature
    • Module: 0 to +70°C (32 to +158°F)
    • Termination Assemblies
      • Polyamide TA: 0 to +70°C (32 to +158°F)
      • PVC TA: 0 to +50°C (32 to +122°F)
  • Relative Humidity: 5 to 95% (non-condensing)
  • Altitude: -300 to +3,000 m (-1,000 to +10,000 ft)

• Storage Conditions

  • Temperature: -40 to +70°C (-40 to +158°F)
  • Relative Humidity: 5 to 95% (non-condensing)
  • Altitude: -300 to +12,000 m (-1,000 to +40,000 ft)

• Dimensions

  • Module 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)