PKUS EO1 Interface converter


Communication channels for relay protection equipment via telecom network


PKUS EO1 is interface converters to connect relay protection equipment including Line Differential Protection and Teleprotection Equipment with C37.94 or optical E1 (CMI, G.704) ports to telecom networks via electrical E1 (HDB3, G.704).

Main functions:

Single C37.94 or optical E1 to electrical E1 interface converter.

Operating mode: Optical E1/Electrical E1 or C37.94/Electrical E1 (programmable in User Interface Program PKUSConverter).

PKU EO1 features
  • IEEE Standard Interface C37.94 Nx64 kbps (N=1…12),

  • Optical interface with SFP transceivers,

  • Alarm LEDs and contacts,

  • Compact case (198x115x50 mm), DIN-rail mounting,

  • Single 48 VDC power supply with two inputs decoupled by diodes,

  • Integrated nonvolatile and not editable event recorder for alarms and user manipulations with 1 ms time stamps from internal Real Time Clock,

  • Optional synchronization of Real Time Clock from IRIG-B input,

  • Upload and text display of all events recoded in PKUS EO1,

  • All events can be saved to not editable file or COMTRADE file,
  • IEC 60870-5-101 for SCADA (IEC 60870-5-104 and SNMP with optional external converter),

  • Windows® compatible User Interface Program PKUSConverter configuration (on-line and off-line downloadable files) changing the configuration is password protected testing and commissioning.


  • PKUS EO1 is compatible with any relay protection equipment with C37.94,

  • Integrated nonvolatile and not editable event recorder,

  • PKUS EO1 complies with or exceeds the requirements of Russian and international EMC standards,

  • Immunity against 500 ms power interruptions.

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