Digital Fault Recorder (DFR) with Phasor Measurement Unit (PMU)

FR947-EX is the evolution and upgrade of LogicLab FR947 Digital Fault Recorder (DFR) with a signal processing unit capable of performing advanced measuring algorithms. LogicLab developed an high-performance device, with state of the art hardware that include a 32bit CPU and 3.6 GFLOPS DSPs parallel architecture.

The DFR is intended for power distribution medium and high voltage substations. With up to 32 analog inputs (voltage or current) at 24 bit resolution, and up to 128 digital inputs, this device provides the best solution for substation monitoring with high levels of precision and accuracy. Each channel (analog or digital) is isolated from all other channels, to power supply and ground.

FR947-EX Digital Fault Recorder is capable of performing different types of recording and stores them on Compact Flash card:

  • TAR (Transient Analog Recording): transient recording. It includes all analog and digital input signals (waveforms).
  • TMR (Transient Measure Recording): disturbance recording. It includes all measures performed by FR947-EX. If enabled, recording start simultaneously with TAR recording.
  • SMR (Slow Measure Recording): slow recording. It includes all measures performed by FR947-EX.

TAR/TMR and SMR have two different sets of trigger user configurable and SMR can be a configured as continuous slow recording. FR947-EX Digital Fault Recorder is capable to manage up to six recordings simultaneously (one TAR, one TMR and four SMR) without loss of data.

FR947-EX/PMU product

For more information about FR947-EX/PMU please visit LogicLab

DFR is equipped with two ethernet 10/100 BASE-TX connection, one fibre optic link 100 BASE-FX, two RS232 connections, FR947-EX can be fully configured, remotely or locally over TCP/IP network. Recordings can be downloaded by remote side via LAN/WAN connection.

FR947-EX Digital Fault Recorder is delivered with two user-friendly software: SpyFR947 that allows a complete management of the device by providing real time tools, records management tool, parameterization tool and LogOscillo that incorporates a complete set of tools for an effective, powerful and precise recordings analysis.

FR947-EX Digital Fault Recorder can be used with PMU software as Phase Measurement Unit for synchrophasors management. PMU software is an optional upgrade that can be performed at any time and doesn’t require hardware upgrade.


  • Standard 19” rack mount
  • Height / Width / Depth: 6U or 9U / 19” / 31 to 40 cm
  • Operating temperature range: -10 ÷ +55°C
  • Storage temperature range: -40 ÷ +85°C
  • Relative Humidity: <95 %
  • Atmospheric pressure: 70 ÷ 106 kPa
  • Intrusion Protection: IP20
  • System frequency: 50/60Hz

Power supply

Power supply voltage (Vaux):

Universal AC/DC power supply

  • AC 88-264V 48-62Hz
  • DC 88-350V

Maximum power consumption: 40W

Voltage dips and short interruption

  • Insensitive to 100% of Vaux for 50 ms (min)
  • Insensitive to 50% of Vaux for 100ms (min)

Hardware features

  • UP to 32 analog inputs
  • Up to 128 single channel isolated inputs x2
  • Up to 32 Alarms
  • Three independent Ethernet ports
  • 2 RS-232 port
  • Up to 32 Gbyte Compact Flash card for storage data
  • 256 Mbyte DDR RAM + 128 MByte SDRAM
  • Real Time Operating System RTEMS


LogicLab s.r.l. is a company specialized in designing hardware, firmware and software for measurement, control and protection devices that are used in all areas of the industrial market where operating reliability is a fundamental requirement.