20-COMM-D Allen-Bradley | PowerFlex DPI DeviceNet Interface

Allen-Bradley 20-COMM-D PowerFlex Drive DeviceNet Communication Adapter

Product Description

The 20-COMM-D (20-COMM-D) is a high-performance DeviceNet communication adapter designed to provide seamless network connectivity for the Allen-Bradley PowerFlex architecture class of AC drives. This module acts as a bridge between the drive's internal Drive Peripheral Interface (DPI) and a DeviceNet network, allowing for real-time control, monitoring, and detailed parameter configuration from a centralized PLC or DCS.

Engineered for internal mounting within the drive’s communication slot, the 20-COMM-D (20-COMM-D) supports critical industrial messaging types, including Polled I/O for high-speed control and Explicit Messaging for non-time-critical parameter adjustments. It is an essential component for distributed control systems where drives must be synchronized over a CAN-based DeviceNet trunk, providing robust data integrity and diagnostic capabilities via front-facing LED indicators.

Detailed Technical Specifications

The 20-COMM-D Series A adapter is designed according to the following engineering specifications:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 20-COMM-D

• Communication Protocol: DeviceNet (CAN-based)

• Drive Interface: DPI (Drive Peripheral Interface)

• Compatibility: PowerFlex 70, 700, 700H, 700S, 753, and 755 series AC drives

• Data Rates: 125 kbps, 250 kbps, and 500 kbps (Supports Auto-Baud detection)

• Node Addressing: 0–63 (Configurable via switches or software)

• Input Voltage: 5V DC (Supplied internally by the host drive)

• Current Draw: 150 mA

• Messaging Support: I/O Messaging (Cyclic) and Explicit Messaging (Acyclic)

• Diagnostic Indicators: 4 Status LEDs (Module, Network, Device, and Comm Status)

• Environmental Rating: IP20 (when mounted within drive enclosure)

• Compliance: ODVA DeviceNet Conformance Tested

• Product Weight: 1.00 lbs (0.45 kg including packaging)

Core Performance Features

• DPI Architecture Integration: Utilizes the standard PowerFlex Drive Peripheral Interface for high-speed internal data transfer, ensuring low-latency response to control commands.

• Auto-Baud Rate Detection: Simplifies commissioning by automatically matching the network speed of the DeviceNet master.

• Comprehensive Parameter Access: Allows users to read and write all drive parameters remotely, facilitating centralized recipe management and maintenance.

• Enhanced Diagnostics: Onboard LEDs provide immediate visual feedback for network health and internal module faults, reducing troubleshooting time.

• Flexible I/O Mapping: Supports custom I/O configurations, allowing users to select which drive data (e.g., Output Current, Torque, Fault Code) is sent back to the controller.