TEBAOFLEX 2YSLCYK-J / Li9Y11CY-JZ Composite Shielded PUR Servo & VFD Cable combines four 600/1000 V motor supply conductors (3 × Phase + PE) and one or two 250 V individually screened auxiliary control pairs inside a single EMC-shielded, oil- and coolant-resistant Grey RAL 7001 polyurethane (PUR) jacket. Designed for PWM frequency converters and closed-loop AC servo drives, its low-capacitance polyolefin core insulation and dual-stage screening isolate motor holding-brake and KTY/PTC thermal sensor signals from high-frequency IGBT switching transients.
1. Application Scope & Servo / VFD Cable Comparison
Industrial servo axes and variable-frequency drives expose motor cables to rapid voltage rise times (dV/dt), synthetic machining coolants, and repeated machine motion:
- CNC Machining Centers & Turning Lathes: Single-cable power, 24 V holding-brake, and stator temperature monitoring connections exposed to cutting oils and metal swarf.
- Automated Gantry, Packaging & Robotics Axes: Flexible cabinet-to-motor harnessing and guided energy-chain routing within verified bending limits.
- Extruders, Conveyors & Test-Bench VFD Motors: EMC-critical industrial drives requiring 360-degree screened containment and UV-resistant outdoor/indoor routing.
| TEBAOFLEX Servo / Drive Series | Core Architecture | EMC Shielding | Outer Sheath & Primary Duty |
|---|---|---|---|
| Composite PUR Servo CY (This Page) | 4G Power + 1×2 or 2×2 Pairs | Pair Foil/Braid + Overall Foil & Cu Braid | Grey RAL 7001 PUR — Servo power + brake/sensor in oil/coolant |
| 2YSLCY-JB / 2YSLCYK-J VFD Cable | 4G or 3+3PE Power Only | Overall Al/PET Foil + Tinned Cu Braid | PVC / Black Jacket — Fixed & flexible high-power VFD feeders |
| Unshielded PUR Drag-Chain Power | 4G to 18G Power / Control | Unshielded | PUR Jacket — Non-EMC drag-chain motor & actuator supply |
| 2XSLCYK-J Double-Screened VFD Cable | 3+3PE Symmetrical VFD Power | Al/PET Foil + Concentric Cu Braid | 90°C XLPE / PVC — Heavy 0.6/1 kV industrial inverter drives |
2. Cable Construction (Power + Individually Screened Control Pairs)
Built from the inner conductors outward to match standard European composite servo connector pinouts (such as M23, M40, and terminal-box gland assemblies):
U, V, W motor phases and protective earth (PE).U/L1/C/L+, V/L2, W/L3/D/L- (or numbered 1, 2, 3) plus one Green/Yellow protective-earth conductor (4G).2×(2×0.75), 2×(2×1.0), or (2×1.0)+(2×1.5)) for 24 V DC holding brakes and PTC/KTY thermal sensors, each wrapped in laminated Al/PET foil (with drain wire or tinned-copper pair braid) to block internal crosstalk.≥85% optical coverage) providing low transfer impedance across kHz-to-MHz switching frequencies.3. Technical Characteristics
Electrical, thermal, mechanical, and environmental specifications for TEBAOFLEX Composite Shielded PUR Servo & VFD Cable:
| Parameter | Engineering Specification |
|---|---|
| Nominal Voltage (U0/U) | Power cores: 600/1000 V AC | Control pairs: 250 V AC |
| AC Dielectric Test Voltage | Power cores: 4,000 V AC (core/core & core/screen) | Control pairs: 2,000 V AC |
| Operating Temperature Range | Flexible motion: -5°C to +70°C (down to -20°C on Class 6 chain grade); Fixed: -30°C to +70°C (+80°C max conductor) |
| Minimum Bending Radius | Flexible / occasional motion: 12 × D (continuous drag-chain: 10 × D to 12 × D); Fixed routing: 4 × D |
| EMC Coupling Attenuation | Dual-shielded pair + overall foil/tinned-Cu braid architecture meeting EN 61800-3 industrial drive EMC practices |
| Oil, Coolant & UV Resistance | Oil & cutting-fluid resistant per EN 60811-404; UV weather-resistant per ASTM G154 |
| Flame Retardancy & Compliance | Self-extinguishing per IEC / EN 60332-1-2; RoHS & REACH compliant |
360-Degree Shield Earthing Rule: Clamp the overall tinned-copper braid circumferentially inside an EMC brass/nickel cable gland at the drive cabinet and inside the metallic motor plug shell, while grounding each internal control-pair screen per the servo manufacturer’s wiring diagram to prevent common-mode noise loops. Browse all industrial & control cables.
4. Standard Composite Power + Control Pair Specification Schedule
Representative two-pair (brake + thermal sensor) and single-pair (brake-only) shielded PUR servo constructions are listed below. Custom pair gauges and DESINA orange jackets are manufactured to order:
| Part Code | Composite Configuration (mm²) | Power Cu Size | Shielded Control Pairs | Nominal OD (mm) | Copper Index (kg/km) | Approx. Weight (kg/km) |
|---|---|---|---|---|---|---|
SERVO-PUR-CY-4G1.5-2P0.75 | 4G1.5 + 2×(2×0.75) | 4 × 1.5 mm² | 2 × (2 × 0.75 mm²) | 12.2 | 134 | 235 |
SERVO-PUR-CY-4G2.5-2P0.75 | 4G2.5 + 2×(2×0.75) | 4 × 2.5 mm² | 2 × (2 × 0.75 mm²) | 13.6 | 182 | 298 |
SERVO-PUR-CY-4G4-2P1.0 | 4G4 + (2×1.0) + (2×1.5) | 4 × 4.0 mm² | 1×(2×1.0) + 1×(2×1.5) | 15.4 | 272 | 405 |
SERVO-PUR-CY-4G6-2P1.0 | 4G6 + (2×1.0) + (2×1.5) | 4 × 6.0 mm² | 1×(2×1.0) + 1×(2×1.5) | 17.2 | 364 | 512 |
SERVO-PUR-CY-4G10-2P1.0 | 4G10 + (2×1.0) + (2×1.5) | 4 × 10 mm² | 1×(2×1.0) + 1×(2×1.5) | 20.3 | 548 | 735 |
SERVO-PUR-CY-4G16-2P1.5 | 4G16 + 2×(2×1.5) | 4 × 16 mm² | 2 × (2 × 1.5 mm²) | 23.8 | 812 | 1,045 |
SERVO-PUR-CY-4G25-2P1.5 | 4G25 + 2×(2×1.5) | 4 × 25 mm² | 2 × (2 × 1.5 mm²) | 27.6 | 1,195 | 1,490 |
SERVO-PUR-CY-4G35-2P1.5 | 4G35 + 2×(2×1.5) | 4 × 35 mm² | 2 × (2 × 1.5 mm²) | 31.2 | 1,610 | 1,960 |
SERVO-PUR-CY-4G1.5-1P1.0 | 4G1.5 + (2×1.0) | 4 × 1.5 mm² | 1 × (2 × 1.0 mm²) | 11.4 | 116 | 204 |
SERVO-PUR-CY-4G2.5-1P1.0 | 4G2.5 + (2×1.0) | 4 × 2.5 mm² | 1 × (2 × 1.0 mm²) | 12.8 | 164 | 265 |
SERVO-PUR-CY-4G4-1P1.5 | 4G4 + (2×1.5) | 4 × 4.0 mm² | 1 × (2 × 1.5 mm²) | 14.5 | 246 | 362 |
SERVO-PUR-CY-4G6-1P1.5 | 4G6 + (2×1.5) | 4 × 6.0 mm² | 1 × (2 × 1.5 mm²) | 16.3 | 338 | 468 |
5. Frequently Asked Engineering Questions
Why combine 600/1000 V motor power cores and 250 V shielded control pairs inside one PUR servo cable?
Modern AC servo motors require three-phase PWM inverter power plus a 24 V DC holding-brake supply and a motor-winding temperature feedback pair (PTC, KTY84, or PT1000). Integrating four 600/1000 V power cores (U, V, W + PE) and two individually screened 250 V control pairs into one composite cable halves cable-carrier fill space, eliminates a second motor gland, and simplifies plug-and-play M23/M40 circular servo connector harnessing.
How are the internal 250 V brake and temperature-sensor pairs protected from IGBT switching noise?
High dV/dt PWM pulses on the motor phase cores can induce false thermal trips or brake chatter if control wires are unshielded. Each internal control pair is twisted in short lay and wrapped with its own aluminum/polyester laminated screen (with optional tinned-copper braid), while the complete core bundle is enclosed by a second overall Al/PET foil and ≥85% optical-coverage tinned-copper braid.
Why choose a Grey RAL 7001 PUR outer sheath over a standard PVC servo cable jacket?
Polyurethane (PUR / 11Y) resists synthetic CNC machining coolants, cutting oils, hydraulic fluids, metal swarf abrasion, and UV exposure (ASTM G154) far better than plasticized PVC, preventing jacket hardening and cracking on machine tools, woodworking routers, and automated assembly cells.
Why is low-capacitance polyolefin (PP/PE) core insulation important on long VFD and servo motor leads?
Polypropylene/polyethylene dielectric has a substantially lower permittivity than PVC, cutting core-to-core and core-to-shield capacitance by 35–45%. Lower cable capacitance reduces inverter peak charging-current spikes, motor bearing currents, and reflected-wave voltage overshoot on longer cabinet-to-motor runs.
How should the overall tinned-copper EMC braid be terminated at the drive cabinet and motor housing?
Always terminate the overall tinned-copper braid across 360 degrees at both the VFD cabinet EMC earthing bar and the metallic servo motor connector shell or EMC cable gland. Pigtailing the braid into a single twisted wire adds high-frequency inductance above 1 MHz and severely degrades radiated-emission compliance.
What technical details should I include when requesting a composite PUR servo cable quote?
Specify your power conductor size and control pair count (e.g., 4G2.5 + 2×(2×0.75) or 4G6 + (2×1.0) + (2×1.5)), static routing vs. continuous drag-chain bending radius and cycle speed, preferred jacket colour (Grey RAL 7001 or DESINA Orange RAL 2003), and required reel lengths.
Specify Your Shielded PUR Servo & VFD Motor Cable
Share your servo drive ecosystem, motor kW/ampacity, control-pair pinout, drag-chain bend radius, and drum quantity. Our engineering desk responds within 24 hours with full capacitance/impedance data and factory pricing.
