Sigma 688 LTT
Manufacture UTP cables with the new LTT (low torsion twisting) quality standard using proven Komax technology within the Sigma family.
Data transfer rates below 100 Mbit/s will become just as important in the future as those at the upper end of the gigabit range. Today”s challenge of producing a UTP in a stable manner to ensure a transfer rate of 10 Mbit/s will probably become the norm in the future. To ensure the required quality of data transfer, a stable physical cable is necessary. As the mechanical properties are directly reflected in the electrical properties, reliable and stable production on demand is of utmost importance. A constant and continuous lay length, a compact and tight helix, as well as precise dimensional accuracy in the lengths of the individual wires result in a highly stable impedance and minimal delay time differences in the twisted cable. Processing techniques such as twisting with back-twisting make it possible to produce a UTP from two single wires on a twisting machine directly on site in the factory – a twisted cable for the demanding data transfer of tomorrow.
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| Specification name | Specification value |
|---|---|
| Wire length, processing on both sides min. | 300 mm |
| Wire length max. | 7000 mm |
| Strip length side 1 min. (Processing set for short open ends) | 0.1 mm |
| Strip length side 1 max. (Processing set for short open ends) | 18 mm |
| Strip length side 2 min. (Processing set for short open ends) | 0.1 mm |
| Strip length side 2 max. (Processing set for short open ends) | 28 mm |
| Strip length side 1 min. (Processing set for open ends, standard) | 0.1 mm |
| Strip length side 1 max. (Processing set for open ends, standard) | 18 mm |
| Strip length side 2 min. (Processing set for open ends, standard) | 0.1 mm |
| Strip length side 2 max. (Processing set for open ends, standard) | 35 mm |
| Wire cross section min. (Processing set for short open ends) | 2 × 0.13 mm² |
| Wire cross section max. (Processing set for short open ends) | 2 × 0.5 mm² |
| Wire cross section min (Processing set for open ends, standard) | 2 × 0.13 mm² |
| Wire cross section (Processing set for open ends, standard) | 2 × 0.5 mm² |
| Wire cross section min. (Processing set for long and different ends on side 1) | 2 × 0.5 mm² |
| Wire cross section max. (Processing set for long and different ends on side 1) | |
| Open wire ends min. (Information without end processing, processing set for short open ends) | 15 mm |
| Open wire ends max. (Information without end processing, processing set for short open ends) | 99 mm |
| Open wire ends min. (Information without end processing, processing set for open ends, standard) | 30 mm |
| Open wire ends max. (Information without end processing, processing set for open ends, standard) | 99 mm |
| Open wire ends min. (Processing set for long and different ends on side 1) | 30 mm |
| Open wire ends max. (Processing set for long and different ends on side 1) | 125 mm |
| Lay length min. | 5 mm |
| Lay length max. | 50 mm |
| Stroke length accuracy | Accuracy: ±10%, max. 5mm per pitch on average over 10pitches |
| Processing outside the specifications | Processing outside the specifications upon request. In case of doubt, we will be happy to provide processing samples for your wires. |
| Hard, tough wires | In the case of extremely hard, tough, or thick-stranded wires, processing might not be possible, even within the cross section range. In case of doubt, Komax will be happy to provide processing samples of your wires. |
| Producible parameters | ** Producible parameters depend on pitch, outer diameter, and end processing. Producibility can be verified using the producibility check software or with a feasibility test. |



