Description

The Allen-Bradley 1771-DB is a Basic Module designed for use within the PLC-5 programmable controller system. This module provides communication capabilities, supporting DH485, PRT1, and PRT2 protocols to facilitate data exchange between the PLC-5 and peripheral devices. Please note that this module was officially discontinued by the manufacturer on December 30, 2015.

Features

• Designed for integration with the Allen-Bradley 1771 I/O chassis.
• Supports multiple communication ports including DH485, PRT1, and PRT2.
• Requires 0.75 Amps at 5VDC from the backplane for operation.
• Compact form factor for standard 1771 chassis mounting.

Applications

This module is typically utilized in legacy PLC-5 automation environments requiring serial communication or DH485 network connectivity for HMI, programming terminals, or third-party device integration.

Technical Specifications

Installation Guidelines

• Ensure the PLC-5 chassis is powered down before inserting or removing the 1771-DB module to prevent electrical damage or backplane faults.
• Align the module carefully with the chassis slot guides and seat it firmly to ensure proper backplane connector engagement.
• Use appropriate shielded cabling for communication ports to minimize electromagnetic interference (EMI) in industrial environments.
• Maintain proper ventilation in the control cabinet to prevent heat buildup around the I/O rack.
• Follow standard ESD (Electrostatic Discharge) precautions when handling the module to protect internal circuitry.

FAQ

Is the 1771-DB still available from the manufacturer?

No, the 1771-DB was discontinued by Allen-Bradley on December 30, 2015. It is now primarily available through secondary market channels.

What are the power requirements for this module?

The 1771-DB requires 0.75 Amps at 5VDC from the PLC-5 backplane.