The Allen-Bradley 1756-DMA31, also cataloged as the 1756DMA31 ControlLogix SynchLink Drive Interface Module, operates as a dedicated hardware component for single-axis drive communication within ControlLogix SynchLink networks.

Model Identification & Configuration

The 1756-DMA31 is a ControlLogix drive interface module designed for direct communication between ControlLogix controllers and SynchLink-enabled drive systems. The module provides a dedicated single-axis interface with defined SynchLink and drive communication channels.

Hardware Specifications

EtherNet/IP and ControlLogix Drive Integration Characteristics

The 1756-DMA31 follows the ControlLogix platform architecture for industrial drive control communication. It exchanges drive-related data through dedicated communication paths and operates as a backplane-connected module within a ControlLogix chassis.

The module architecture supports deterministic industrial control timing through defined communication rates. SynchLink communication operates at 5 Mbps, while drive communication is configured for a 10 Mbps data rate for synchronized drive system operation.

The module uses the ControlLogix backplane communication structure, allowing controller-level coordination with connected motion and drive components. Firmware compatibility should be verified according to the installed ControlLogix processor and chassis configuration.

Ordering Information

• 1 x Allen-Bradley 1756-DMA31 ControlLogix SynchLink Drive Interface Module
• 1 x Standard module housing assembly
• 1 x Factory installed terminal and communication interface components
• 1 x Product identification label

Installation and Application Guidelines

Chassis Installation

• Install the module in a compatible ControlLogix chassis slot according to Rockwell Automation installation requirements.
• Verify chassis power supply capacity before adding the module to an existing rack.
• Confirm backplane communication compatibility with the controller platform.

Drive Communication Wiring

• Use appropriate communication cables according to the SynchLink network design.
• Maintain proper cable routing separation from high-voltage power conductors.
• Apply standard industrial grounding practices for communication shielding.

Configuration Requirements

• Confirm module firmware compatibility before system commissioning.
• Configure drive communication parameters through the applicable ControlLogix programming environment.
• Verify SynchLink network timing and communication status after installation.

Frequently Asked Questions

• What is the primary function of the 1756-DMA31?

The module provides a single-axis interface between ControlLogix controllers and SynchLink drive systems for synchronized drive communication.

• Is the 1756-DMA31 a standalone controller?

No. The module requires installation in a ControlLogix chassis and operates as a communication interface component.

• What communication rate does SynchLink use on this module?

The SynchLink communication interface operates at a 5 Mbps data rate according to the module specifications.

• What is the drive communication speed of the 1756-DMA31?

The drive communication interface supports a communication data rate of 10 Mbps.

• How much backplane power does this module require?

The specified power requirement is 1.35 A at 5 VDC from the ControlLogix chassis backplane.

• Can the module be installed in any ControlLogix rack position?

Installation position depends on chassis configuration, controller requirements, and the system design documentation.

• Does the module support multiple drive axes?

The 1756-DMA31 is specified as a single-axis drive interface module.

• What should be checked before firmware replacement or upgrade?

Firmware compatibility with the installed ControlLogix controller, chassis hardware, and communication configuration should be verified.