Shanghai Ren Automation Technology has been dedicated to the exploration, learning, and innovation of DC power technology since its establishment. We do not offer a wide range of products; we specialize in just one type of product – DC power screens.

We are one of the few companies capable of repairing DC screen charging module mainboards, and we can service the majority of DC power modules available on the market.

We've always adhered to the belief that technology is the key to market ownership.

Our DC power panel passed the inspection by the National Relay Protection and Automation Equipment Quality Supervision and Inspection Center and the Xuchang Kaipu Electric Inspection and Research Institute in 2012 (Certificate No. JW120747).

Years of technical accumulation, stemming from our interest and passion for the DC power supply industry!

We are committed to providing our clients with high-quality, stable, and reliable DC power technology. Our charging modules incorporate the following technologies:

Resonant Voltage-Controlled Power Converter - Full-Switching Soft-Switching Power Conversion Technology

Soft-switched resonant DC-AC inverter circuit technology

Resonant Voltage Control Power Converter Technology

Active Power Factor Correction Step-Up Transformer Technology

Good quality and excellent quality are essential for better serving customers and creating value for them.

After 10 years of storms and trials, we remain true to our初心, producing high-quality domestic DC screens. We continuously learn, elevate ourselves, engage in healthy competition, appreciate each other, and support one another. Welcome friends to call and inquire about cooperation opportunities.

DC screen, Shanghai Junren offers the best quality at competitive prices!

Factory Address: No. 18, Cao Lian Branch Road, Jiading District, Shanghai

Phone: 021-34619255

Postal Code: 200235

Sales Vice President: Liang Zhengming 15202122187

Email: 15202122187@163.com

Factory Receiver: Li Shantao    18162136277

Shanghai Ren's Standard DC Screen Overview:

The GZDW(ZR) DC Power Cabinet, developed by Shanghai Zhiren Automation Technology Co., Ltd., incorporates advanced high-frequency switching power supplies and is complemented by our proprietary system software, representing a new generation of unattended DC power products. All its components are selected for high reliability. Compared to traditional DC screens, it features a 7.4-inch industrial-grade color touch screen for the display and operation unit, with an IP32 protection rating, allowing intuitive operation through a man-machine dialogue interface; its monitoring unit is equipped with a high-speed, high-performance SCU, which scans all components of the DC screen in real-time to achieve comprehensive monitoring and closed-loop control; and its power output unit is configured with a high-frequency switching power supply and redundant setup, ensuring the reliable conversion of AC power into high-quality DC power.

Our core products and technological advantages:

Shanghai Ren Company's DC screen modules utilize the following technologies:

Resonant Voltage Control Power Converter - Full-Process Soft-Switching Power Conversion Technology

Soft-switched resonant DC-AC inverter circuit technology

Resonant Voltage-Controlled Power Converter Technology

Active Power Factor Correction Step-Up Transformer Technology

10 years of technical accumulation, dedicated to providing you with more professional and comprehensive DC screen technical services.

This product has a high degree of automation, and for routine operations, it does not require a high level of specialized knowledge from the on-duty staff. Operation can be carried out by following this user manual.

Operating Environment

2.1 Altitude not exceeding 2,000 meters.

2.2 Environmental Temperature: -10°C to +50°C

2.3 The average relative humidity on the 2nd and 3rd days does not exceed 95%, and the monthly average relative humidity does not exceed 90%.

2.4 No strong vibration or impact, no strong electromagnetic field interference.

2.5 Free from serious dust, explosive hazard media, corrosive metals, and harmful gases that damage insulation, conductive particles, and severe mold.

2.6 Vertical inclination not greater than 5 degrees.

III. Technical Specifications

3.1 Three-phase AC input voltage: 380V (±15%, -10%), frequency: 50 Hz ±0.5.

3.2 DC output voltage of busbars: 220V / 24V / 48V / 110V

3.3 Rated DC output current of busbar: 40A.

3.4 The rated capacity of the maintenance-free, fully-sealed lead-acid battery is applicable for: 40AH-500AH (in this case, 120AH).

3.5 Control bus voltage stability ≤ ±0.2%.

3.6 Control bus voltage ripple factor ≤ ±0.1%.

3.7 Constant Current Accuracy ≤ ±0.5%.

3.8 Breaker bus voltage ≤ 15%, 10%.

3.9 Maximum output current (A): 1.2IN.

3.10 Efficiency ≥ 90%.

3.11 Power Factor > 0.90

3.12 Response Time: 0.2ms.

3.13 Total noise ≤50dB

3.14 Flow Distribution Method: Automatic Flow Distribution.

3.15 Harmonic: No Interference.

3.16 Input Terminal High Voltage Surge: Level 4 Lightning Protection