Dji M400 Drone Tether Power System with Synchronously Retracting and Releasing Cables

• Customization: Available
• Supporting Flight Duration: ≥ 24h
• Cable Length: 55m 110m
• Ground Module Input Voltage: 190-240VAC Wide Range Input
• Ground Module Output Voltage: 700~750VDC Adjustable
• Ground Module Output Power: ≥3500W (Rated Long-Time Output)
• Ground Module Weight: 12.5 ± 0.2kg
• Air Module Input Voltage: 580~810VDC Wide Range Input
• Air Module Output Voltage: 51.8 ± 0.5VDC, Constant Voltage Output
• Air Module Output Power: 3000W (Rated Long-Term Output)
• Air Module Weight: 995 ± 10g
• Transport Package: Plastic Hard Case
• Specification: 720×570×380±5mm
• Trademark: Rosefinch
• Origin: Nanjing, China
• Production Capacity: 1000/Year

Product Description

Product Description

DJI M400 Drone Tether Power System with Synchronously Retracting and Releasing Cables

      The tether power supply system can perfectly adapt to the DJI Matrice 400 RTK drones, integrating UAVs with a ground-based power station through a durable tether cable, delivering continuous electricity to enable extended flight operations. This innovative solution eliminates battery limitations, allowing drones to perform prolonged missions without interruptions - dramatically improving operational productivity.

      The tethered power supply system is used for the uninterrupted operation of UAV during long flight. It has a wide range of applications in many fields such as surveillance, monitoring, aerial lighting, relay communication, high-altitude cleaning tasks (like high-rise building facade and window cleaning tasks) and other tasks at high altitude for a long time through stable power supply.

Product Configuration

Ground Module

Air Module

Video Demonstration

Function characteristics

1. Lightweight and Portable, Fast deployment
Compact design, easy to carry by one person, supports rapid field deployment for mobile operations.

2. Intelligent Winch Automated Control System
Follow the takeoff and landing of the UAV to synchronously cable reel in/out, adaptively cable tension auto management, and
backup battery to activate cable reel in function in case of power cut off.

3.  Smart Power & Battery Management
Constant voltage output prevents unnecessary charging/discharging, extending battery lifespan and always maintain a fully charged standby state during operation.

4. Real-Time Monitoring Touchscreen (4.3-inch)
Real time display: electrical parameters such as real time power/voltage/current/temperature/cable length/power consumption/running time.
Operating data curve chart: Voltage/current/temperature curve chart. Fault record. Logs storage and read.

5. Multiple Protections, Safe and Reliable

 •  Complete AC/DC isolation for maximum safety 

 •  Multiple protections: overvoltage, undervoltage, overcurrent, short circuit  •  Ultra-high withstand voltage ≥ 3000VDC

6. Flexible Communication System
Wired communication: USB Type-C or RJ45 high-speed transmission.
Wireless communication: Bluetooth 5.0 low-power connection.
Optic fiber wired communication: Optic fiber. Achieve fast data transmission.

7. Low Voltage Button to Start AC Input, No Need AC Air Switches, Improve The Safety. 
Adopting low-voltage soft starting mode, replacing traditional circuit breaker starting, with ultra-high waterproof rating far superior than air switches, further improving the safety of isolated AC contact use.

Product Packaging

Product Paramenters

Ambient temperature	-20~45 ℃ (working), -40~65 ℃ (storage)
Relative humidity	10-80% RH (working), 5-90% RH (storage)
Altitude	≤ 3000m
Ground power module
Input voltage	190-240Vac wide range input, single-phase 220Vac,frequency 50/60Hz
Output voltage	700-750Vdc adjustable
Output power	≥3500W (Rated Long-Time Output)
Take-up and payoff speed	0-2m/s, adjustable
Take-up and payoff tension	0-15N, adjustable
Interface	Input: Lingke LP20-3P; Output: Lingke LP12 aviation plug,Type-C or RJ45 wired communication, fiber optic FC port (optional)
Button and switch	AC switch, front lighting switch, backup battery switch
Backup battery for retract cable	Nominal 14.4V, fully charged 16.8V, 3000mAh  108*76*25.2mm, 346±6g
Size	D360*W186*H268 ±0.5mm, excluding foot pads and external accessories
Weight	12.5 ±0.2kg, including 110m cable
Tether cable
Material	Alloy lightweight high-temperature resistant aviation wire, composite fluoroplastic insulation layer, high modulus tensile aviation grade fiber woven layer
Fiber optic communication	The tethered cable is an optoelectronic composite cable containing tightly wrapped single-mode fiber with optional fiber optic communication.
Current	5A rated
DC resistance	8.3±0.2Ω, 100m@20℃loop
Tensile strength	≥100kg, resistant to repeated reaction and release times≥1000
Insulation strength	≥3000Vdc, 1min, no breakdown
Cable length	Standard equipment 110m, optional 55m; Fiber optic with FC connector (optional).
Outer diameter	2.5±0.1mm
Weight	12.0±1g/m

Air module
Input voltage	580~810Vdc wide range input
Output voltage	51.8 ± 0.5Vdc, constant voltage output
Output power	3000W (rated long-term output)
Installation method	Quick dismantling track mount under the drone
Heat dissipation method	External fan for active cooling, reserved air ducts for forced air cooling
Interface	Input LP12-3P, output LP12 for lighting
Size	Maximum outline size: 160*94*49 ±0.5mm, excluding sliders and connectors
Weight	995 ± 10g, excluding sliders, external connectors, and wires

Company Profile

Rosefinch Technology is the leading manufacturer of drone tethering power station.
Rosefinch mainly engages in the R&D, production, sales of AC-DC, DC-DC high-frequency switching power modular and the drone tether power system. The system is compatible for all multi rotor drones with MTOW 3-110kg.

Professional Services
Over 10 years of experience in the development andproduction of tether system.

Fast service, most professional tether station solution provider.

Smaller size,lighter weight, easier operation, automatedcable tension management, constant voltage which canprotect drone original battery

Customization accepted