Product Overview

The Allen-Bradley 20-COMM-E is a high-performance communication interface designed to bridge PowerFlex® 7-Class variable frequency drives with EtherNet/IP™ networks. By converting the drive's internal Drive Peripheral Interface (DPI) to a standard Ethernet protocol, this module enables real-time control, configuration, and data acquisition over a unified industrial network. It is a critical component for integrating motor control into Logix-based architectures, allowing for centralized management via Studio 5000 or Connected Components Workbench.

This adapter supports a broad range of Rockwell Automation controllers, including ControlLogix, CompactLogix, and legacy SLC 500 or PLC-5 systems. With its ability to handle high-speed I/O messaging and explicit messaging simultaneously, the 20-COMM-E ensures that drive status, velocity feedback, and fault diagnostics are transmitted with sub-millisecond precision, supporting the demanding requirements of modern synchronized motion and process control.

Networking Capabilities and Performance

The 20-COMM-E provides a robust 10/100 Mbps communication link, automatically detecting network speed and duplex settings. It is engineered to manage high traffic volumes, supporting up to 16 concurrent Common Industrial Protocol (CIP) connections and 30 TCP connections.

• High-Speed Throughput: Processes up to 400 I/O packets per second, ensuring responsive drive behavior in high-cycle applications.

• Deterministic Control: Supports Requested Packet Intervals (RPI) as fast as 5ms, providing the low-latency feedback required for closed-loop regulation.

• Web-Based Diagnostics: Features a built-in web server that allows technicians to view drive parameters and network statistics using a standard web browser without specialized software.

• Flexible Messaging: Facilitates both "Exclusive Owner" connections for primary control and "Input Only" or "Listen Only" connections for secondary monitoring systems.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 20-COMM-E

• Adapter Type: EtherNet/IP to DPI (Drive Peripheral Interface)

• Compatibility: PowerFlex 70, 700, 700H, 700S, 700L, and 750 Series (via 20-750-20COMM-ERD)

• Network Speed: 10/100 Mbps (Full/Half Duplex)

• Power Consumption: 350 mA @ 5V DC (Sourced from the host drive)

• Operating Temperature: -10°C to 50°C (14°F to 122°F)

• Humidity: 5–95% Non-condensing

• Dimensions: 1.9 cm x 8.6cm x 7.85cm

• Weight: 0.085 kg (85g)

• Compliance: UL 508C, CAN/CSA C22.2, EN 61800-3, CE

Installation and Integration Features

• Internal Mounting: The module installs directly into the drive’s internal communication slot, maintaining a clean cabinet profile and reducing external wiring.

• Simplified Configuration: Supports BOOTP and DHCP for automatic IP address assignment, or manual addressing via drive parameters.

• Status Visibility: Equipped with diagnostic LEDs for Network Status (NS), Module Status (MS), and Link Activity, enabling rapid onsite troubleshooting.

• Legacy Bridging: Provides a cost-effective pathway to upgrade serial-based PowerFlex installations to modern Ethernet architectures without replacing the drive hardware.