RELY-REC 2022-06-08T09:04:28+02:00


Time-aware Network Recorder

In critical systems, it is essential being able to analyze the network communications at frame level for testing and forensic purposes. Furthermore, the validity of this analysis will be constrained by the capability of the infrastructure to correlate the frames with a common time reference. For that purpose, Relyum has developed RELY-REC, a device that is able to inspect, timestamp and record regular Ethernet and high-availability Ethernet traffic, using the same PTP timing reference than the network under analysis.

As an example, due to the critical nature of communications in Electric sector, RELY-REC is an all-in-one solution specifically designed to analyze the traffic in the modern IEC 61850 Digital Substations where the use of combined HSR, PRP and PTP has generated a new challenge for the operators. This device is synchronized with a IEEE 1588-2008 PTPv2 infrastructure, that may be the same shared by the other equipment of the substation.

TAP recorder relyum

Conventional Ethernet Connection - TAP mode

relyum recording hsr/prp ptp

PTP synchronization through recording ports

rely-rec prp networks

Parallel Redundant Protocol (PRP) connection - Port Mirroring mode

port-mirroring recording relyum

Conventional Ethernet connection - Port Mirroring mode

hsr ring rely-rec recorder

High-Availability Seamless Redundancy (HSR) connection - TAP mode


  • 2 x SFP cages for 10/100/1000Base-TX Ethernet copper or 100Base-FX/1000Base-X fibre for TAP or Port Mirroring connection
  • 1 x SFP cages for 10/100/1000Base-TX Ethernet copper or 100Base-FX/1000Base-X fibre for expansion connection (alternative PTP Source, Modbus/S7/MQTT connections, etc.)
  • 1 x 10/100/1000Base-TX Ethernet copper port for Console management and for non-stop remote access to recorded data
  • IEC 62439-3 v3 Clause 5 “High-availability Seamless Redundancy (HSR)”
  • IEC 62439-3 v3 Clause 4 “Parallel Redundancy Protocol (PRP)”


  • IEEE 1588-2008 PTPv2
  • Operation modes: Transparent Clock, Ordinary Clock
  • Profiles: Default, Power, IEC 61850-9-3, AS
  • Optional PTP sources for timestamping reference:
  • Dedicated port for external PTP Master
  • NTP configurable
  • Internal reference

Other interfaces

  • 1 x RS485 port
  • 2 x USB type A ports
  • 1 x Pulse-Per-Second (PPS) SMA output
  • 1 x Sensor expansion module (optional)

Processing capabilities

  • Simultaneous read/write data operation supported
  • Industrial temperature grade high capacity SSD disk
  • Remote access to Log Data Files configurable and standard format (PCAP)
  • Triggering based on:
    • Direct I/O Signals and Modbus/S7/MQTT variables
    • Packet monitor
      • IEC 61850: SMV events, GOOSE messages events, PTP events
  • Filtering:
    • Based on standard filtering format used in the sector

Rugged devices

  • Fanless design
  • Full metal enclosure
  • Redundant Power Supply: 6VDC to 30 VDC
  • Operating temperature: -40°C to +70°C
  • Storage temperature: -40°C to +85°C
  • Optional mounting: DIN rail

Configuration and Management

  • Dedicated Ethernet service port
  • SNMPv3, SSH
  • Web-based HTML5-GUI access/configuration:
  • Accessible through HTTP(S)
  • Configuration profiles and Firmware updates
  • Real-time network monitoring

RELY-REC is a flexible platform with a high number of available configurations to offer the most suitable device for each customer. This flexibility is achieved through optional pluggable modules, which cover the most diverse applications of the Energy and Industrial sectors.

Sensor Module

The Sensor Module has been designed to provide in a single board a wide range of input and output signals commonly used in the Industry, in order to interact with the environment. The inputs and outputs available in this module are:

  • 3 x Digital inputs: Isolated 0-24 VDC
  • 1 x Analog input: 4-20 mA
  • 1 x Potential-free relay output 250 VAC max
  • 1 x Three-wire RTD (PT100) temperature sensor interface
  • 1 x Thermocouple Type K sensor interface
  • 1 x Integrated electronic piezoelectric (IEPE) accelerometer input
  • 1 x RS422 (optional)
  • 1 x RS485 + 1 x RS232 (optional)

To extend the capacity of input/output switchboard, it is possible to connect a second Sensor Module to one of the non-used slots.

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