Overview

The FBM203 is an input module designed for temperature measurement using Resistance Temperature Detectors (RTDs), with a range of models offering different input characteristics. Its rugged, isolated design ensures high accuracy in demanding industrial environments, including Class G3 environments.

Features

• RTD Input Channels
  • Eight isolated RTD input channels
• High Accuracy
  • Sigma-delta conversion for precise measurement
  • Accuracy:
    • FBM203/d: ±0.03% of span
    • FBM203/b: ±0.03% of span
    • FBM203/c: ±0.1% of span
• Environmental Suitability
  • Suitable for harsh environments (Class G3)
• Lead Resistance
  • FBM203/FBM203B: 50 ohms maximum per lead
  • FBM203C: 10 ohms maximum per lead
• Signal Processing
  • A/D conversion per channel with independent sigma-delta technique
  • Common Mode Rejection >125 dB at 50/60 Hz
  • Normal Mode Rejection >95 dB at 50/60 Hz
• Sensor Compatibility
  • Works with platinum, nickel, and copper RTDs
  • Specific models for platinum and nickel RTDs with different resistance ranges at 0°C

Functional Specifications

• Input Range
  • FBM203/203D: 0 to 320 ohms (64000 counts)
  • FBM203B: 0 to 640 ohms (64000 counts)
  • FBM203C: 0 to 30 ohms (64000 counts)
• Sensor Current
  • FBM203/203D & FBM203B: 0.19 mA DC nominal
  • FBM203C: 0.54 mA DC nominal
• Accuracy Temperature Coefficient
  • ±50 ppm/°C
• Integration Period
  • Configurable via software
• Typical RTDs
  • FBM203/203D: Platinum (100 ohms nominal at 0°C), Nickel (235 ohms nominal at 0°C)
  • FBM203B: Platinum (200 ohms nominal at 0°C), Nickel (470 ohms nominal at 0°C)
  • FBM203C: Copper (10 ohms nominal at 25°C)

Environmental Specifications

• Operating Temperature
  • Module: -20 to +70°C (-4 to +158°F)
  • Termination Assembly: -20 to +70°C (-4 to +158°F)
• Storage Temperature
  • Module: -40 to +70°C (-40 to +158°F)
  • Termination Assembly: -40 to +70°C (-40 to +158°F)
• Humidity: 5 to 95% (non-condensing)
• 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)
• Vibration Resistance: 7.5 m/s² (0.75 g) from 5 to 500 Hz
• Contamination: Suitable for use in Class G3 (Harsh) environments

Physical Specifications

• 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)
• Weight
  • Module: 284 g (10 oz)
  • Termination Assemblies:
    • Compression Type (DIN rail mounted): 181 g (0.40 lb)
    • Compression Type (Baseplate mounted): 245 g (0.57 lb)
    • Ring Lug Type: 249 g (0.55 lb)

Cable Specifications

• Cable Length: Up to 30 m (98 ft)
• Cable Materials: Polyurethane or Low Smoke Zero Halogen (LSZH)
• Cable Connection:
  • FBM Baseplate End: 37-pin D-subminiature
  • Termination Assembly End:
    • Compact FBM203/b/c: 25-pin D-subminiature
    • Compact FBM203d: 37-pin D-subminiature

Construction

• Termination Assembly Materials:
  • DIN Rail Mounted TAs: Polyamide (PA), compression and ring lug
  • Baseplate-Mounted TAs: Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS), compression
• Accepted Wiring Sizes:
  • DIN Rail Compression TAs: 0.2 to 4 mm² (24 to 12 AWG)
  • Baseplate Compression TAs: 0.2 to 1.5 mm² (24 to 16 AWG)
  • Ring Lug: #6 size connectors (0.375 in/9.5 mm)