Features and Highlights

• IEEE C37.94 compliant Multi-Mode optical fiber interface for transmission over short-reach multi-mode optical fiber link
• IEEE C37.94 modulation compliant Single-Mode optical fiber interface for transmission over long-reach, single-mode optical fiber link (≤ 40 KM, ≤ 80 KM, ≤ 120 KM, ≤ 150 KM, ≤ 180 KM), without optical repeaters.
• Unrivaled Speed, Security and Reliability
• Use in a Standalone, Point-To-Point Application
• Use as an integrated part of the VCL-MX Version 6 E1 Voice and Data Multiplexer solution over an SDH or PDH data network
• 1+1 Route / Path Protection when used as an integrated part of the VCL-MX Version 6 E1 Voice and Data Multiplexer solution over an SDH or PDH data network.
• Compact, standard 19-Inch Rack-mountable, 2U high chassis.
• Bi-directional Transmission of 8 command Inputs and 8 command outputs
• Full Duplex Operation
• Automatic loop test facility
• User programmable for Direct Tripping, Permissive Tripping and Blocking Protection Schemes
• IRIG-B / NTP Time Synchronization
• Compliant with IEC 60834-1 standards
• Available in 24V DC, 48V DC, 110V DC and 250V DC configurations.
• Available with 3 options:
• 8 Command Teleprotection Terminal (8 Nos. Tx & Rx independent command inputs & outputs for providing interconnection with Protection Relays).
  C37.94 Optical Interface, Single Mode 1310nm.
  Available power options: 48V DC, 110V DC, 250V DC
• 8 Command Teleprotection Terminal
  (8 Nos. Tx & Rx independent command inputs & outputs for providing interconnection with Protection Relays).
  C37.94 Optical Interface, Multi-Mode 850nm.
  Available power options: 48V DC, 110V DC, 250V DC
• 8 Command Teleprotection Terminal
  (8 Nos. Tx & Rx independent command inputs & outputs for providing interconnection with Protection Relays).
  C37.94 Optical Interface, Multi-Mode 1310nm.
  Available power options: 48V DC, 110V DC, 250V DC

Flexibility and User Programmability

• User programmable command holding delay for error resistant command inputs
• User programmable command sampling rate for error resistant command transmission
• Less than 2ms command transfer time
• Less than 4ms relay operating time
• Less than 6ms back-to-back operating time (including relay operating time) in IEEE C37.94 Optical mode

Technical Specifications

Event and Alarm Logging

• Time-Stamped Alarm Logging
• Time-Stamped Event Logging.

Management and Monitoring

• RS232 serial, USB serial interfaces for local terminal access
• 10/100BaseT Ethernet Interface for remote access over an IP network
• Encrypted Password Protection
• Telnet - Remote access over IP links
• SSH - Secured remote access using Secure Shell Protocol over IP links
• SNMP Traps and NMS for real time remote monitoring and management over an IP network
• Automatic Link Test feature - link testing at user programmable periodical intervals
• Visual I/O status - LED Display.

Reliability

• Advanced Communication Protocols to ensure reliable transmission of commands
• Power Supply Immunity to withstand impulse surges and transients of up to 10,000 Volts
• High Quality Relays – withstands voltage 10 kV between coil and contacts (1.2 × 50 μþs)
• Maximum Switching Voltage: 400V AC or 300V DC
• Optoisolated Command Inputs
• Optoisolated Relay Outputs
• Relays - Mechanical: 10,000,000 operations min. (at 18,000 operations/hour).

Error Detection and Coding

• Line Code Violation Detection
• LOS Detection
• Block Command Encoding as per IEEE C37.94.

Application Diagram

Teleprotection over IEEE C37.94 Optical Interface

Figure # 1 – Typical Point-to-point Application

Teleprotection over IEEE C37.94 Optical Interface in 1+1 Configuration

Figure # 2 – Typical Application over a IEEE C37.94 compliant optical link, as an integrated part of the VCL-MX Version 6 - E1 Voice and Data Multiplexer solution over an SDH or PDH data network.

Typical Application over an IEEE C37.94 compliant optical link

Figure # 3 – Typical Application over an IEEE C37.94 compliant optical link, as an integrated part of the E1 PDH Voice & Data Multiplexer solution over an SDH or PDH data network.