Universal HDSL Standalone Isolator Units

The Universal HDSL Standalone Isolator units provide 50kV RMS, 70kV Peak high-voltage isolation between one 4-wire Remote HDSL Terminal Unit (HxTU-R) located inside the substation, and an HDSL Central Office (CO) Terminal Unit (HxTU-C) located at the CO.

These units consist of an isolator card mounted inside a compact fiberglass enclosure. The enclosure is lightweight and flame-retardant with high dielectric strength. Its fiberglass body limits the possibility of many kinds of infiltration while providing reliable isolation from external ground potentials.

Each standalone unit is shipped with a 10’ PVC insulated 6-pair CMAW cable for connection to the CO’s incoming cable. Both the 751239R2 and 751239SP units can be configured for 1 x 4-wire operation, 1 x 2-wire operation or 2 x 2-wire operation. As such both units can accomodate HDSL, HDSL2 and HDSL4. The 751239R2 can be used for G-SHDSL applications. The 751239SP version comes complete with a multi-input to -48Vdc power supply with battery-back-up enabling the unit to reproduce network Span Power to drive the HDSL HxTU-R located at the substation. The 751239SP can be used with or without the Span Power option.


Product Number CLEI Number Description Download Documents
751239R2 SLC5CBAAAA Universal HDSL Standalone Isolator Unit Specifications Installation Guide
751239SP NPMIKMJARA Universal HDSL Standalone Isolator Unit with Station-side Span-Power Specifications Installation Guide

Applications:

  • HDSL Classic (2B1Q), 1 or 2 x HDSL2, and HDSL4 with CO-side loopback of Network Span Power

Universal HDSL Standalone Isolator Unit with Station-side Span-Power

Features

  • Units provide 50 kVrms (70 kV peak) isolation while maintaining full communication between terminals during a GPR event.
  • Communication is maintained across the gap by isolation transformers that provide low-loss, low-distortion transmission
  • The Power Supply of the Model 751239SP accepts inputs of floating 130 Vdc, floating 48 Vdc or 120 Vac with battery back-up on the Station side to provide span-power to the terminating HxTU-R
  • Enclosures resist the infiltration of dust, mist, and water from sprinklers
  • Jumper settings allow you to configure cards to provide a simplex or a loop return-path for network Span Power on the CO side. The voltage will not be transferred to the Station side.
  • Jumper settings allow the unit to be configured for 2-wire or 4-wire HDSL. When set in 2-wire mode, the unit can acomodate two HDSL2 circuits

HDSL Isolation Unit

Features

  • Units provide 50 kVrms (70 kV peak) isolation while maintaining full communication between terminals during a GPR event
  • Communication is maintained across the gap by isolation transformers that provide low-loss, low-distortion transmission
  • Model 751239R2 does not require power from either the CO or an external supply to operate
  • Enclosures resist the infiltration of dust, mist, and water from sprinklers
  • Jumper settings allow you to configure units to provide a simplex or loop return-path for network Span Power on the CO side. The voltage will not be transferred to the Station side.
  • Jumper settings allow the unit to be configured for 2-wire or 4-wire HDSL. When set in 2-wire mode, the unit can accomodate two HDSL2 circuits