Siemens digital wiring unit (DDF)

Siemens DDF unit

Feature description:
1. Siemens SM-75Ω ohm and other different impedance series, various cabinets and other combinations are available for customers to choose;
2. Performance: strict structural design, high-quality metal, non-metallic materials, standard gold plating and superb, strict process to ensure stable and reliable product performance;
3. Structure: a complete and scientific cable structure, regardless of the middle wiring, both sides of the wiring, front and rear jumpers, and inter-frame jumpers are more in line with your usage habits, more convenient operation, complete grounding system, diverse fixing The perfect design of the details such as the method and the 90-degree rotating unit body ensure that the customers are more convenient to use.

Corresponding parameter set not found, please add it in property template of background

　　Technical index:

　　1. Environmental requirements:

　　1 Working temperature: -5℃～+40℃

　　2 Storage temperature: -25℃～55℃

　　3 Working relative humidity: ≤85%(+30℃)

　　4 Storage relative humidity: ≤75%

　　5 Atmospheric pressure: 70KPa～106Kpa

　　2. Equipment rack:

　　1 Frame height: 2000mm, 2200mm, 2600mm

　　2 Frame material: aluminum profile, cold-rolled sheet

　　3 Cable entry method: upper cable entry, lower cable entry

　　4 Operation mode: full front operation

　　5 Frame color: optional

　　6 Grounding method: copper strip

　　3. Coaxial connector:

　　1 Characteristic impedance: 75Ω

　　2 Working rate: 2Mb/s, 8 Mb/s, 34 Mb/s, 140 Mb/s, 155 Mb/s (except some systems)

　　3 Insulation resistance:>1000MΩ(500VDC)

　　4 Electric strength: ≥1000V(50HzAC)/min, no breakdown, no arcing

　　5 Contact resistance: outer conductor ≤2.5mΩ (crimp), inner conductor ≤10 mΩ

　　6 Insertion loss: ≤0.3dB (50KHz～233MHz)

　　7 Return loss: ≥18dB (50KHz～233MHz)

　　8 Crosstalk defense degree between loops: ≥70dB (50KHz～233MHz)

　　9 Pull-off force: >50N

　　10 Connector life: ≥1000 times

　　11 Material: brass, beryllium bronze

　　12 Coaxial connector gold plating thickness: ≥2um

Serial number	product name	Specification model	Dimensions (height * width * depth)	Material	Remarks
1	SM-8 unit	8 systems/16 circuits	10048590	Pure copper	19″ inch cabinet
2	SM-10 unit	10 systems/20 circuits	10048590	Pure copper	19″ inch cabinet
3	SM-16 unit	16 systems/30 circuits	14048590	Pure copper	19″ inch cabinet
4	SM-20 unit	20 systems/40 circuits	14048590	Pure copper	19″ inch cabinet
5	SM-21 unit	21 systems/42 circuits	14055090	Pure copper	19″ inch cabinet

暂未实现,敬请期待

Key words