Overview

The FBM231 is a Field Device System Integrator Module by Foxboro, designed for communication between field devices and control systems. It supports up to 64 devices per module, with fast data transfer rates and various communication protocols.

Functional Specifications

• Communication Ports: Four serial I/O ports, supporting RS-232, RS-422, and RS-485 communication
• Transmission Rates: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 baud
• Protocol: 8-bit characters, odd/even/no parity, 1 or 2 stop bits
• I/O Capacity: Up to 64 devices, 2000 DCI point connections per module
• Data Types: 2-byte or 4-byte integers, IEEE 4-byte single-precision floats, or binary
• Fastest ECB Block Period: 500 msec
• Channel Isolation: Galvanic isolation, withstands 600 V AC for one minute

Power Requirements

• Input Voltage: 24 V DC ±5%, -10% (Redundant)
• Power Consumption: 7 W maximum per module
• Heat Dissipation: 7 W maximum per module

Environmental Specifications

• Operating Temperature:
  • Rev A to L: -20°C to +70°C (-4°F to +158°F)
  • Rev M and later: 0°C to +70°C (32°F to +158°F)
• Storage Temperature: -40°C to +70°C (-40°F to +158°F)
• Relative Humidity: 5% to 95% (non-condensing)

Physical Specifications

• Mounting:
  • Mounts on a modular baseplate, vertically or horizontally on a DIN rail
  • Can be mounted in a 19-inch rack using a mounting kit
• Dimensions (Module):
  • Height: 102 mm (4 in)
  • Width: 45 mm (1.75 in)
  • Depth: 104 mm (4.11 in)
  • Height (including mounting lugs): 114 mm (4.5 in)
• Mass:
  • Module: 284 g (10 oz)
  • TA Ring Lug: 363 g (0.8 lb)
  • TA Compression Screw: 272 g (0.6 lb)

Cables and Connections

• FBM231 to TA Cable Lengths: 1 m (3.2 ft) to 5 m (16.4 ft)
• Termination Cable Type: Type 5
• RS-232 (DB-25) to Modem/Converter/Device: Up to 15 m (50 ft)
• RS-422/RS-485: Up to 1200 m (3937 ft)