Product Description:

The ZK1090-3131-0002 is a motor cable manufactured by Beckhoff as part of the ZK Motor Cables series. In an automation cell, it links compact servo amplifiers to motors, encoders, or hybrid field devices, providing both power conductors and twisted signal pairs in a single preassembled harness. This specific variant is intended for cabinet-internal routing or tight machine spaces where a short lead and repeatable connector orientation are required. Its polyurethane jacket maintains flexibility while resisting abrasion, oil, and coolants that are routinely present on production lines.

With a length of 0.20 m, the cable eliminates excess loops and fits neatly beside drives or terminal modules. Factory-installed terminations consist of two straight male M8 plug connectors, so installation only requires threading them onto the mating sockets and tightening them to 0.4 Nm. Each core can carry up to 4 A at 40 °C, and the insulation system is rated for 50 V AC / 60 V DC, matching the low-voltage supplies used with Beckhoff servomotors. A braided and foil shield covers 90% of the circumference to suppress electromagnetic interference, while the PUR jacket supports at least 100 mating cycles without insulation damage.

The internal wiring follows a star-quad geometry made from 19 × 0.1 mm stranded copper, giving an Ethernet-compatible cross-section of 1 × 4 × 0.14 mm² (AWG26) for differential feedback signals. This layout keeps pair symmetry and limits crosstalk, as shown by a mutual capacitance of 51 pF/m at 1 kHz and a signal running time of 5.55 ns/m. The assembly has 250 Ω/km loop resistance, so voltage drop stays minimal over the short path, and the four contacts are arranged in a 4-pin A-coded pattern for consistent pin assignment. The cable withstands repeated coupling and uncoupling, and its shield is bonded 360° to each connector shell to maintain low impedance during flexing in drag-chain applications.