Foxboro G448-0002 Serial Communication Gateway Module

Catalog Number: G448-0002
Model Series: G448 Series — I/A Series Communication Module
Manufacturer: Foxboro (Schneider Electric / Invensys)

Product Overview:
The G448-0002 is a serial communication interface module for the Foxboro I/A Series distributed control system. It provides RS-232/RS-485 serial port connectivity to enable communication with third-party devices, PLCs, RTUs, and smart field instruments using industry-standard protocols.

Category:
Description

Technical Specifications:

Parameter Value
Communication Ports 1 x RS-232, 1 x RS-485 (Configurable)
Supported Protocols Modbus RTU, Modbus ASCII, DF1 Master/Slave, HART Pass-Through
Baud Rate 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
Data Bits 7 or 8
Parity None, Even, Odd
Stop Bits 1 or 2
Max Devices per Port 32 (RS-485 Multi-Drop)
Isolation 500 VAC optical isolation
Operating Temperature 0°C to +60°C (32°F to +140°F)
Power Consumption <3 W

Structural Features:

  • Plug-in module for I/A Series I/O carrier
  • DB-9 connector for RS-232; terminal block for RS-485
  • DIP switches for protocol and address configuration
  • LED indicators for TX, RX, and fault status

Functional Features:

  • Acts as Modbus Master or Slave
  • Supports DF1 (Rockwell/Allen-Bradley) protocol for legacy device integration
  • Enables HART pass-through to smart transmitters
  • Configurable via I/A Series control software (Foxboro Control Builder / System Manager)

Working Principle:
The G448-0002 receives serial data from the I/A Series controller via the carrier backplane. It converts the data to the selected serial protocol format and transmits it through the RS-232 or RS-485 port. Incoming serial data is converted back to I/A Series format for processing by the controller.

Advantage Highlights:

  • Multi-protocol support eliminates need for external protocol converters
  • Optical isolation protects the DCS from field-side electrical transients
  • HART pass-through enables smart device integration without additional hardware
  • Up to 32 devices on a single RS-485 bus

Applicable Industries:
Oil & Gas, Chemical, Power Generation, Water/Wastewater, Manufacturing, Building Automation

Installation Requirements:

  • Mount in I/A Series I/O carrier slot designated for communication modules
  • Use shielded cable for RS-485 connections in electrically noisy environments
  • Terminate RS-485 bus with 120 Ω resistor at both ends for distances >100 m
  • Set unique Modbus/DF1 addresses via DIP switches or software

Usage Precautions:

  • Do not exceed 115,200 bps baud rate
  • Maximum RS-485 cable length: 1200 m (4000 ft) at lower baud rates
  • Ensure proper grounding to avoid ground loops
  • Update firmware via I/A Series system tools only
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