Specifications

Electrical

• Signal wires: Multi‑core twisted pair with double shielding (foil + braided copper)

• Insulation: Teflon (PTFE) for oil, heat, and chemical resistance

• Conductor: Silver‑plated stranded copper for low resistance and stable high‑speed signal transmission

• Impedance: Matched to FANUC encoder serial communication standards

• Voltage rating: 300 VAC, 50/60 Hz

Mechanical

• Outer jacket: Industrial‑grade PVC, oil‑resistant, flame‑retardant

• Bend radius: ≥8× cable diameter (flexible for cable chain applications)

• Length: Custom lengths available (standard: 3 m, 5 m, 10 m, 15 m)

• Weight: Approx. 0.15 kg/m

Environmental

• Operating temperature: ‑20°C to +60°C

• Storage temperature: ‑30°C to +70°C

• Humidity: 10%–90% RH, non‑condensing

• Resistance: Oil, coolant, vibration, and EMI/RFI interference

Key Features

• Ultra‑low‑noise transmission: Double shielding eliminates external electromagnetic interference, supporting ±1 count positioning accuracy even at high speeds (up to 20,000 rpm).

• Durable industrial design: Teflon insulation and oil‑resistant jacket withstand harsh workshop conditions (oil mist, coolant, continuous vibration).

• Plug‑and‑play compatibility: Directly compatible with FANUC Alpha/Alpha‑i servo motors (α6/3000, α8/3000, αi series) and A06B‑6079‑H106/H206/H208/H304/H401 amplifiers.

• Absolute encoder support: Transmits battery‑backed absolute position data for no‑homing start‑up (absolute encoder models).

• Long‑term reliability: Silver‑plated copper resists oxidation, ensuring stable signal transmission over years of continuous use.

Installation and Wiring

1. Connector connection: One end plugs into the motor encoder connector (JF1/JYA2), the other into the servo amplifier’s feedback port (e.g., JA7A/JA7B).

2. Cable routing: Separate from high‑power motor cables (U/V/W) by ≥20 cm to avoid inductive interference; use cable chains for moving axes.

3. Grounding: Connect the cable’s shield drain wire to the amplifier’s PE (protective earth) terminal at both ends.

4. Bend control: Avoid sharp bends (<90°) and excessive tension; secure with cable clamps every 50–80 cm.

Safety Precautions

• Disconnect all power (24 VDC control + DC link) before connecting/disconnecting the cable.

• Do not bend or twist the cable beyond its rated bend radius to prevent internal wire breakage.

• Keep the cable away from hot surfaces (≥80°C) and sharp metal edges to avoid insulation damage.

• Use only FANUC‑specified replacement cables; non‑standard cables may cause signal loss or position errors.

Common Issues & Troubleshooting

• Alarm 33/34 (Encoder signal loss): Check cable connections for looseness; inspect for broken wires or damaged shielding.

• Position drift/erratic movement: Verify shielding grounding; re‑route cable away from power cables.

• Absolute encoder battery drain: Check for intermittent cable connection causing repeated encoder wake‑up.

Maintenance

• Inspect cables monthly for wear, cracks, or oil contamination.

• Check connector pins for oxidation or bending every 3 months.

• Replace cables immediately if insulation is damaged or wires are broken.

• Refer to FANUC manual B‑65165E for detailed wiring and maintenance guidelines.

Applications

• CNC machine tools: Machining centers, lathes, grinders with Alpha/Alpha‑i servo systems.

• Industrial robots: Joint servo motor feedback cables.

• High‑precision automation: Gantry systems, rotary tables, and linear motor units.