Order now the 20-COMM-C, a high-reliability ControlNet communication adapter designed for seamless networking of Allen-Bradley PowerFlex drives.
What Is the 20-COMM-C?
The 20-COMM-C is a specialized communication interface module that allows PowerFlex 7-Class and 70-Series drives to connect directly to a ControlNet network. ControlNet is a scheduled, deterministic network designed for high-speed data transfer of critical control information. By installing the 20-COMM-C into the drive’s internal DPI (Drive Peripheral Interface) port, users gain full access to drive parameters, status information, and control commands from a central Logix controller. This adapter is essential for large-scale automation systems where synchronized motion and precise timing between multiple drives and controllers are required, providing a robust and noise-immune communication link.
Key Technical Specifications
- Network Protocol: ControlNet (Scheduled and Unscheduled)
- Data Rate: 5 Mbps
- Interface: Internal DPI (Drive Peripheral Interface)
- Connections: Dual BNC connectors for media redundancy
- Power Consumption: 250mA @ 5V DC (supplied by drive)
- Operating Temperature: -10°C to 50°C (14°F to 122°F)
System Integration and Redundancy
The 20-COMM-C supports redundant media through its dual BNC ports, ensuring that communication remains active even if one trunk cable is damaged. This makes it a preferred choice for high-availability processes. It integrates perfectly with RSNetWorx for ControlNet, allowing for easy scheduling of I/O data. The adapter also enables «Premier Integration» within Studio 5000, where the drive configuration is embedded in the PLC project, facilitating rapid troubleshooting and reduced engineering time during system expansion.
Expert Tips
When installing the 20-COMM-C, always ensure that the drive is completely powered down before inserting the module into the DPI slot. Ensure that the ControlNet address switches on the module are set correctly according to your network map before powering up. To prevent network reflections and signal degradation, always use high-quality RG-6 quad-shielded cable and ensure that unused BNC ports on the network taps are properly terminated with 75-ohm resistors.
Frequently Asked Questions
Q: Does the 20-COMM-C require an external power supply?
A: No, the module draws its operating power directly from the PowerFlex drive through the internal ribbon cable or DPI connection.
Q: Can I use this with a PowerFlex 525 drive?
A: No, the 20-COMM-C is designed for the DPI architecture of the 7-Series (PF70, 700, 750). The 520-Series uses the 25-COMM series adapters.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here: https://atlantechdrives.com/manufacturers/allen-bradley/
