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PRP redundancy modules

PRP redundancy modules for Industrial Ethernet

High failsafe performance is particularly important in many networks. PRP redundancy modules enable parallel network redundancy with no switch-over time in the event of an error. The modules therefore ensure the high availability of your network.

Your advantages

  • Easy setup of high-availability network infrastructure without configuration
  • No switch-over times for uninterrupted operation in the event of an error
  • No loss of packets in the event of network failure or failure of individual network components
  • Can be used under the harshest electromagnetic, electrostatic, and climatic ambient conditions in accordance with IEC 61850-3 and IEEE 1613
  • Integration of non-PRP-capable devices in parallel networks for maximum availability

High-availability networks

The Parallel Redundancy Protocol (PRP) supports data communication without switch-over times, therefore enabling maximum possible network availability. This is achieved through PRP network redundancy, which is based on two independent, active paths between two devices.

The sender uses two independent network interfaces which send the same data simultaneously. The redundancy control protocol then ensures that the recipient only uses the first data packet and discards the second. If just one packet is received, the recipient knows that a failure has occurred on the other path.

Example network structure with the Parallel Redundancy Protocol

Parallel network redundancy with the PRP redundancy module

Versatile use

PRP is suitable for Ethernet protocols such as PROFINET, IEC 61850, EtherNet/IP™, DNP3, IEC 60870-5-104, Modbus/TCP as well as other protocols above Ethernet Layer 2.

PRP standardized network redundancy can also be used independently of the network topology and the redundancy mechanisms used in the respective network. This makes the redundancy method suitable for all energy applications and also makes it ideal for chemical engineering, pharmaceutical engineering, and process technology as well as sensitive production systems.

PRP redundancy modules for high availability

PRP module with Ethernet cables for redundant network cabling  

PRP module for setting up redundant networks

The FL RED redundancy modules from Phoenix Contact make it easy to set up a parallel, high-availability PRP network without any configuration at all. During startup, you simply need to make sure that the components are connected correctly in accordance with the color coding on the device. Ethernet devices which do not support the Parallel Redundancy Protocol can be integrated into this high-availability network infrastructure without involving laborious configuration.

Diagnostic functions via LEDs and a floating signal contact also support setup and operation of the parallel network.

The redundancy modules also satisfy the extreme electromagnetic, electrostatic, and climatic requirements of standards IEC 61850-3 and IEEE 1613 for use in energy systems. A power supply with a wide supply range also ensures reliable operation even in the event of a fluctuating supply voltage in the system.

FL RED redundancy modules at a glance

Redundancy module with two RJ45 redundancy portsRedundancy module with two LC FO redundancy ports
Transmission speed10/100 Mbps10/100 Mbps
Port configuration2x RJ45 as redundancy ports
1x RJ45 for end device
2x LC FO (multimode) as redundancy ports
1x RJ45 for end device
Temperature range-40°C ... +70°C-40°C ... +70°C
Supply voltage20 V DC ... 48 V DC20 V DC ... 48 V DC
Approvals and standardsSatisfies IEC 61850-3 and IEEE 1613Satisfies IEC 61850-3 and IEEE 1613

Click here to view the product list PRP redundancy modules for use in energy systems.

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Further information


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