Order now the 20-750-PNET2P, a dual-port PROFINET communication adapter engineered for the Allen-Bradley PowerFlex 750-Series. This module bridge allows Rockwell Automation drives to be seamlessly controlled by PROFINET-based controllers, providing a high-speed, flexible link for modern multi-vendor automation environments.
What Is the 20-750-PNET2P?
The 20-750-PNET2P is a high-performance communication module that enables PowerFlex 753 and 755 drives to function as PROFINET IO devices. The «2P» designation signifies its dual-port capability with an integrated Ethernet switch, which simplifies wiring by supporting linear and ring topologies. This module is essential for plants that utilize Siemens or other European-standard PLCs while preferring the robust motor control capabilities of Allen-Bradley drives. It allows for the exchange of cyclic data (I/O) for real-time control and acyclic data for parameter configuration and advanced diagnostics. The architecture is designed to plug directly into the drive’s internal slots, maintaining a compact footprint while offering advanced networking features like Media Redundancy Protocol (MRP).
Key Technical Specifications
- Protocol: PROFINET IO (RT and IRT support)
- Ports: 2 RJ45 ports with integrated 10/100 Mbps switch
- Conformance Class: Class B and C
- Topology: Star, Linear, and Ring (MRP)
- Module Slots: Fits Slots 4-8 of PowerFlex 750 drives
- Addressing: Via DCP (Discovery and Configuration Protocol) or internal parameters
- Data Rate: 100 Mbps Full Duplex
- Status Indicators: 4 Diagnostic LEDs (Link 1, Link 2, Network, Module)
System Integration and Media Redundancy
The 20-750-PNET2P architecture is optimized for high-uptime environments. By supporting the Media Redundancy Protocol (MRP), the module allows the drive to be part of a ring network that can recover from a cable break in milliseconds. Integration into the PROFINET controller is handled via a GSDML file, which defines the drive’s I/O mapping and parameter access. The module supports a variety of Telegrams (PPOs), allowing users to balance network speed with the amount of diagnostic information retrieved from the drive. This versatility makes it a preferred choice for large-scale automotive and water treatment projects using hybrid control systems.
Installation Advice
When installing the 20-750-PNET2P, ensure that the drive’s firmware is compatible with the version required by the GSDML file. Use high-quality Category 5e shielded cables to mitigate the effects of EMI from the drive’s PWM output. During the initial setup, you must assign a unique «Profinet Name» to the module using a discovery tool or the drive’s HIM; without this name, the PLC will be unable to establish a connection even if the IP address is correct.
Frequently Asked Questions
Q: Does the 20-750-PNET2P support PROFIsafe?
A: No, this module is for standard control and diagnostics. For safety-rated communication over PROFINET, additional safety hardware and specific firmware are required.
Q: Can I use the two ports for different IP subnets?
A: No, the ports act as a switch for a single network interface. They share one IP address and one PROFINET Device Name.
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