28AWG 20-Core Shielded Servo Cable
In high-speed automation lines, signal crosstalk and intermittent encoder faults aren’t just annoyances—they are the direct cause of unplanned downtime and scrapped batches. The 28AWG 20-Core Shielded Servo Cable is engineered to eliminate these weak links in motion control systems. It delivers consistent signal integrity between drives and servo motors, reducing commissioning time and long-term rework costs across your installed base.
Why This Cable Delivers More Runtime
A defined geometry of 20 stranded 28AWG cores
The fixed core count and fine stranding let the cable handle continuous flexing in cable tracks without conductor fatigue. In multi-shift production, this translates to longer replacement intervals and fewer line stoppages for re-cabling.
Full-coverage double-layer shielding: aluminum-mylar foil plus tinned copper braid
The foil blocks high-frequency noise from adjacent power lines; the braid absorbs low-frequency interference and strengthens the ground path. The result is a clean encoder feedback loop—no position drift, no ghost pulses that force a drive fault reset.
Low-capacitance insulation (polypropylene or PE-based dielectric)
Lower conductor-to-conductor capacitance preserves the sharp rising edges of TTL and serial encoder signals over longer cable runs. You can place drives further from the motor without adding repeater boxes.
Oil-resistant, flame-retardant jacket (PUR or specialized PVC)
The jacket resists mineral oils, synthetic ester-based coolants, and abrasion from cable chains. No jacket swelling, no insulation degradation—fewer cable replacements in harsh CNC machining centres and stamping lines.
Sequential laser-marked metre scale on jacket
Installation teams cut and dress cable far faster. The metre marking also simplifies remnant management and re-order calculation, cutting waste on large-scale retrofit projects.
Technical Specifications & Dimensions
| Parameter | Value / Range |
|---|---|
| Core count | 20 |
| Conductor size | 28 AWG |
| Conductor construction | Stranded bare copper or tinned copper (common 7/0.127 mm or similar) |
| Insulation material | Polypropylene (PP) or cross-linked PE (XLPE), colour-coded |
| Shielding | Aluminium-mylar foil (100% coverage) + tinned copper braid (≥85% coverage) |
| Jacket material | Polyurethane (PUR) or oil-resistant PVC |
| Jacket colour | Green (RAL 6018) or orange (RAL 2003), custom available |
| Rated voltage | 300/500 V (flexible use) |
| Temperature range | -20 °C to +80 °C (flexing) / -40 °C to +80 °C (fixed) |
| Bending radius | ≤10 × outer diameter (flexing) / ≤5 × outer diameter (fixed) |
| Impedance | 100–120 Ω (signal pairs) |
| Capacitance | ≤55 pF/m (core-to-core) |
| Flame test | IEC 60332-1-2, VW-1 |
| Oil resistance | IRM 902, ICEA S-82-552 |
| Approvals | CE, RoHS; cables built to EN 50306 and VDE 0812 guidelines |
Actual values are documented in the per-batch test report. Contact our engineering team for a specific datasheet matching your drive/motor pairing.
Where This Cable Fits Your System
- CNC machine tools and machining centres – Withstands millions of flex cycles in cable chains while keeping encoder and brake signals clean, even under heavy coolant spray.
- Packaging and printing machinery – The 20-core layout carries encoder channels, temperature sensors, and brake conductors in one compact jacket, reducing cable count inside tight gantry arms.
- Automated guided vehicles (AGVs) and mobile robots – Light and limp enough not to resist steering actuator movements; double shielding prevents motor-drive EMI from corrupting navigation sensor data.
- Textile and food-processing plants – Oil-resistant and wipe-down-ready jacket stands up to cleaning agents and escaping lubricants, maintaining cable performance in high-humidity environments.
- Wind-turbine pitch and yaw systems – Low-temperature flexibility and reliable shielding prevent signal loss across the slip ring, where a single missed encoder count can trigger a costly turbine fault.
International Compliance & QA Standards
- ✅ Designed and tested according to IEC 60332-1-2 (vertical flame propagation for a single cable)
- ✅ Meets EN 50306 railway-grade electrical and mechanical requirements—applicable for demanding industrial motion
- ✅ CE marking under the Low Voltage Directive 2014/35/EU
- ✅ RoHS 2 (2011/65/EU) compliant materials throughout all conductors, insulation, and jacket compounds
- ✅ Factory QA system certified to ISO 9001:2015; lot traceability back to raw copper and polymer batches
- ✅ Shielding effectiveness verified per IEC 62153-4-3 (transfer impedance method) on request
FAQ
Q: Can I replace a 15-core or 25-core servo cable with this 20-core version?
It depends on your pin assignment and spare pairs. Many 15-core applications can be migrated to 20 cores if you need extra signal paths for thermal sensors or holding-brake conductors. For 25-core applications, you must check whether unused pairs can be eliminated without compromising logic sequencing. Our application engineers can cross-reference your drive-side connector pinout to confirm.
Q: What is the maximum unsupported horizontal travel distance in a cable track?
Acceleration, fill weight, and track design dictate the limit, not just the cable. As a rule of thumb, for travels beyond 30 metres, we recommend a strain-relief clamp at the mid-point or a guided track system. Based on your CAD layout of the e-chain, we can calculate the expected service life in double strokes.
Q: Is this cable suitable for Siemens, Bosch Rexroth, or Yaskawa drive systems?
Yes—on the electrical side. This cable is built to handle the signal levels and shielding requirements of those platforms. The mechanical compatibility depends entirely on the connector assembly. We supply the bulk cable; you or your harness partner terminate it with the required M23, M40, or specific drive-maker circular connectors. We provide a connector pinout recommendation tool for common drive series.
Start with a Test Length. No Surprises.
Order a pre-cut sample length with the full documentation set: a datasheet, a shielding-effectiveness test report, and a jacket compound certificate. Test it in your own cable track and coolant environment. If the performance matches, we fulfil the full production order with the same lot-controlled material. Submit your technical requirement form on this page, and our engineering desk will confirm a delivery schedule within one working day.