CAN bus slip ring DHS099F-39

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Short Description

• Product: OD 99mm Electric Excavator Waterproof Slip Ring
• Model: DHS099F-39
• Total Circuits: 39 (24 Power + 15 Signal)
• Rated Current: Power: 30A, Signal: 10A
• Rated Voltage: 0~380VAC/VDC
• Contact Material: Gold-to-Gold
• Operating Speed: 0~300 rpm
• Protection Class: IP65
• Application: Electric Excavator / Construction Machinery

Product Overview
The DHS099F-39 is a heavy-duty combined slip ring developed for electric excavators and diesel-to-electric retrofit projects. It is mounted at the excavator slewing center to transfer electrical power and control signals from the stationary lower chassis (battery / power source) to the rotating upper structure (cabin, slew motor, hydraulic pump motor, controller, sensors). With an outer diameter of 99 mm, an IP65 sealed aluminum alloy housing, and separated power/signal chambers, it eliminates cable winding, signal interruption, and high-voltage disconnection during continuous 360° rotation.

Key Features

• Multi-circuit combined design – 24 power circuits + 15 signal circuits in one compact unit
• High current capacity – 30A per power circuit, suitable for e-excavator main drive and pump motor
• Stable signal transmission – dedicated CAN-L/CAN-H circuits, shielded signal wires, no cross-talk with power
• IP65 protection – dust-tight and resistant to water jets, fit for construction site, mining, outdoor use
• Gold-to-gold contacts – low electrical noise, low wear, long service life
• Encoder support – optional encoder circuit for slew angle / feedback
• Flange mounting – easy integration with central slewing joint
• Maintenance-friendly – corrugated conduit on rotor leads, clear stator/rotor marking

Technical Specifications
Model: DHS099F-39
Outer Diameter: Ø99 mm
Total Circuits: 39 (24 power + 15 signal)
Rated Current: Power 30A / circuit, Signal 10A / circuit
Rated Voltage: 0–380V AC/DC
Operating Speed: 0–300 rpm
Insulation Resistance: Power ≥1000MΩ @1000VDC; Signal ≥500MΩ @500VDC
Dielectric Strength: Power 1500VAC; Signal 500VAC
Dynamic Resistance: <10 mΩ
Contact Material: Gold-to-gold
Housing: Aluminum alloy
Protection Class: IP65
Operating Temp.: -20°C ~ +80°C
Lead Wire: AWG14 Teflon (power), 1mm² shielded (signal)
Service Life: 10 million revolutions

Application in Electric Excavators

• Lower vehicle side (stator / inner ring) – connected to chassis battery pack or dragged-cable 380V supply
• Upper vehicle side (rotor / outer ring) – connected to slew motor, pump motor, cabin controller, camera, sensors
• Transmitted circuits include: high-current DC/AC power for slew motor and hydraulic pump drive; 24V auxiliary power for controller, display, lights; CAN bus between BMS, MCU and upper controller; encoder / angle feedback; pressure, tilt, temperature sensor signals

Why IP65 + OD99 for Excavator Retrofit

• OD99mm fits common central slewing flange space of 7–24t class excavators
• IP65 handles dust, rain, mud splash on site; upgradeable to IP67 for mining
• Power/signal separated chambers avoid motor inrush current interfering with CAN
• Gold contacts + Teflon leads reduce heat rise under continuous duty