Edco HCO Central Office Line - CO Trunk 66-Block Surge Protector.
The Emerson Edco HCO Central Office Line - CO Trunk Surge Protector TVSS Advanced Ultra High Speed Technology; 66 Block surge suppression.
The HCO modules are ultra-high-speed fused solid-state UL 497B secondary protectors for KEY / PBX telephone systems lines. The units are available in three application-specific models. The H-Series is constructed with solid state silicon foldback technology, polyswitch resettable fuses - PTCs - and failure fuses. The protective elements switch from the normal high impedance state to low impedance state upon a detection of a surge, then switch back to high impedance after the surge has subsided. This advanced protection circuitry provides the industry's fastest trip time for surge voltages as well as sneak current (an electrical characteristic that is often overlooked in surge suppression).
Each module is equipped with a test point for easy maintenance. The H-Series single-pair modules fit onto a standard 66 M1-50 split blocks and replace the bridging clips. In addition, these modules require the EDCO MGB Ground Rail for each 66 M1-50 block used.
H Series PDF