ABB Bailey 1947685A31 Communications System Interface Module

The 1947685A31 functions as a dedicated communications interface for ABB Bailey control systems. This ABB unit bridges network protocols for seamless data exchange across the facility. We engineered this module to enable reliable connectivity between controllers and enterprise systems.

Technical Specifications and Design Features

This communications module weighs approximately 0.48 kilograms. Its dimensions measure 280 millimeters in height, 25 millimeters in width, and 280 millimeters in depth. The unit features a robust metal housing with integrated edge connectors for backplane installation.

Engineers will appreciate the multi-protocol capability of the 1947685A31. This module supports Modbus, DNP 3.0, and Modbus TCP protocols simultaneously. Consequently, users can connect legacy field devices alongside modern Ethernet-based equipment.

Furthermore, the three independent network interfaces provide flexible connectivity options. One RS-232 port handles local programming and configuration. An RS-485 port connects to field device networks. The Ethernet port provides high-speed links to supervisory systems.

Protocol Conversion and Data Management

The 1947685A31 performs real-time protocol conversion between disparate systems. This module translates messages from one protocol to another without external gateways. Users can integrate devices from multiple manufacturers into a unified architecture.

The unit stores conversion rules and network parameters in 512 kilobytes of flash memory. This non-volatile storage retains configuration during power cycles. Engineers can modify settings through the RS-232 port using standard terminal software.

System Integration and Architecture

You can install this communications module in any INFI 90 rack system. The 1947685A31 communicates with the system master through the Module Bus. This integration enables data exchange between Bailey controllers and third-party devices.

The module operates from 5V DC power supplied through the backplane. It consumes only 3.8 watts during normal operation. For reference, other Bailey INFI 90 communication components share this same form factor and installation method.

Diagnostics and Operational Reliability

The 1947685A31 includes comprehensive diagnostic features for network monitoring. Status LEDs indicate power, communication activity, and protocol status for each interface. The module performs continuous self-checks to detect configuration errors. These diagnostics simplify troubleshooting and ensure reliable network operation.