FBM201 RH914SQ | Foxboro Analog Input Interface Module

Overview

FBM201 RH914SQ Foxboro Analog Input 0 to 20 mA Interface Module offers high-performance, isolated, and independent analog input channels designed for precision control and monitoring.

Process I/O

• Input Channels: 8 isolated and independent channels
• Input Range: 0 to 20 mA DC
• Accuracy: ±0.03% of span, temperature coefficient ±50 ppm/°C
• Impedance: 61.5 Ω nominal
• Field Device Cabling Distance: Determined by compliance voltage (22.8 V DC), wire resistance, and device voltage drop
• Signal Conversion: Independent Sigma-Delta A/D converter per channel

Performance Features

• Common Mode Rejection: >100 dB at 50/60 Hz
• Normal Mode Rejection: >95 dB at 50/60 Hz
• Integration Period: Software configurable
• Channel Isolation: 600 V AC for one minute between channels or to ground

Power Requirements

• Input Voltage: 24 V DC ±10% (redundant)
• Power Consumption: 7 W
• Heat Dissipation: 4 W

Environmental Specifications

• Operating Temperature:
  • Compact FBM201: -20°C to +60°C (-4°F to +140°F)
  • Termination Assembly: -20°C to +70°C (-4°F to +158°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Humidity: 5–95% (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)
• Vibration: 7.5 m/s² (0.75 g) from 5 to 500 Hz
• Contamination: Class G3 (Harsh), per ISA S71.04

Physical Specifications

• Dimensions (Compact FBM201):
  • Height: 130 mm (5.12 in)
  • Width: 25 mm (0.98 in)
  • Depth: 150 mm (5.9 in, including connectors)
• Weight:
  • Compact FBM201: 185 g (6.5 oz)
  • Termination Assembly (TA):
    • Compression: 181 g (0.40 lb)
    • Ring Lug: 249 g (0.55 lb)

Mounting and Connections

• Mounting:
  • Compact 200 Series 16-slot horizontal baseplate for horizontal DIN rail or 19-inch rack installation
  • TA mounts on 32 mm (1.26 in) or 35 mm (1.38 in) DIN rails
• Cabling:
  • Termination Cable Length: Up to 30 m (98 ft)
  • Baseplate to TA Connection:
    • FBM End: 37-pin D-subminiature
    • TA End: 25-pin D-subminiature

Materials and Construction

• FBM Construction: Polyamide (PA)
• Cable Material: Polyurethane or Low Smoke Zero Halogen (LSZH)