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
Manufacturer
Allen-Bradley
Model Number
1771-DB
Module Type
Basic Module
Communication Ports
DH485, PRT1, PRT2
Backplane Current Draw
0.75 Amps at 5VDC
Status
Discontinued
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.
