NEC standard digital distribution frame (DDF)

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DDF Digital Distribution Frame Series

DDF Digital Distribution Frame

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Product Description
Product parameters
Order Information

NEC standard DDF unit, adopting a modular structure, with flexible and convenient installation.

· The rack has a narrow frame structure, with sufficient wiring and storage space, and the cable routing is clear and aesthetically pleasing.

· Two racks can be installed side by side or back to back, and the rack is equipped with hooks and rings for easy cable management.

· The installation holes of the unit fit into the rack's fixed screws, and tightening them completes the installation, making it quick, simple, and reliable. To disassemble the unit, just loosen the screws(without removing them). The unit can then be removed.

· There is a complete grounding system.

· All plastic parts in the unit are made of flame-retardant materials.
· Characteristic impedance:75Ω

· Operating rate:2Mbit/s、8Mbit/s、34Mbit/s、45Mbit/s、140Mbit/s、155Mbit/s

· Contact resistance:a)Outer conductor≤2.5mΩ, after mechanical durability test, increased value≤2.5mΩ b)Inner conductor≤10mΩ, after mechanical durability test, increased value≤10mΩ

· Insulation resistance:≥1000MΩ, the voltage of the measurement circuit is500V(DC)。

· Withstand voltage: can withstand1000V(AC)/1minwithout breakdown or arcing.

· Crosstalk defense level between return lines:≥70dB(50kHz～233MHz)

· Insertion loss:≤0.3dB(50kHz～233MHz)

· Return loss:≥18dB(50kHz～233MHz)

· Pull-out force: after the coaxial connector is connected to the cable, the resistance to cable stretching is >50N

· Mechanical durability: Coaxial connector insertion and removal1000times, the contact resistance, insertion loss, return loss, separation force, and retention force meet the requirements, and the contact surface still has a plating layer, without exposing the substrate material.