최근 몇 년간, 전자 산업은 빠르게 발전했고, 전자 제품의 종류와 기능은 점점 더 다양해지고 있다. 심지어 의료 장비도 점점 더 다양해지고 있다. 의료 관련 시스템에는 여러 가지 주행 전압이 포함될 수 있으며, 총 와트 수에 대한 수요도 증가한다. 초기에는 고객이 여러 의료 전력 공급 업체만 사용할 수 있었습니다. 하지만, 이제 고객들은 다른 선택을 할 수 있습니다. 의료 규정에 따라 MEAN WELL NMP650/1K2 의료용 등급 모듈식 전원 공급 장치 또는 UMP-400 시리즈를 선택할 수 있다.

의료용 등급의 전원 공급 장치인 UMP-400 및 NMP 시리즈를 적극 추천하는 주요 이유 

                                        그림 1: 120Vac 이하 138uA의 누설 전류

                                                     230Va 미만 234uA의 누설 전류

                                         그림 2: 120Vac 이하 476uA의 누설 전류

                                                      230Vac 이하 856uA의 누설 전류

그림 3. UMP-400-48KJ_Voltage test 

표 2. UMP-400-48KJ_ 시험 데이터 

 

그림 4. UMP-400의 구성

모듈식 전원 공급 장치, NMP650/1K2: 새로운 기능 소개 

의료 등급 모듈식 전원 공급 장치, NMP650/1K2 소개 

Introduction of Medical Grade Modular Power Supply

In recent years, the electronics industry has developed rapidly, and the types and functions of electronic products have become more and more diverse. Even medical equipment has become more and more diversified. A medical-related system may contain several different driving voltages, and the demand for total wattage increases as well. In the early days, customers could only use multiple numbers of medical power suppliers. However, now customers can have different choices. They can choose MEAN WELL NMP650/ 1K2 medical-grade modular power supply or UMP-400 series, in compliance with medical regulations.
 
  
UMP-400 series is a 1U low profile module power supply. Its flexible and modular design makes it an unrivaled type of power supply on the market.  It not only can be used as a single enclosed PSU, but also a multiple outputs PSU if installs the available NID35/65/100 series DC-DC converter module cards into the UMP-400 PCB.  In our planning, UMP-400 as a standard product it just supplies single output rail, either 24 or 48V.  When you need multiple output rails, please contact MEAN WELL. We can provide customized services immediately. Up to 4 rails of output voltage can be provided. The output voltage can fully meet the needs of various machine, equipment and applications that require multiple sets of outputs.
   
NMP650 and NMP 1K2 are medical graded power supplies. Independent output module slot and ultra wide output voltage range enable users to set and modify output voltage, current, and wattage according to their demands. NMP series is equipped with intelligent control functions, such as voltage and current control, remote power on and off, over-temperature warning, and DC OK signal, providing remote control and monitoring applications. For the performance of temperature control, the fan speed is automatically adjusted through its internal temperature detection function. 1U miniaturized design significantly enlarges the power density. As for certification, NMP meets medical safety regulations (60601-1), and the circuitry design also refers to IT industry regulations 62368-1. Multiple functions and high quality can fully satisfy all industries' demands. With a five-year warranty and quality verification, the NMP family is an intelligent multi-module power supply with high performance and reliability.
 
 
  

 
Main reasons that we highly recommend our medical-grade power supplies, UMP-400 and NMP series.
 

1. Low Earth Leakage Current Requirement Medical equipment usually contains several compartments, a 3D printer for printing, an LCD screen for display and control, sensors to direct the printer head, and heating elements. These peripheral components are operated at different DC voltages that require multiple AC to DC power supplies that often caused the equipment fails to meet the Low Earth Leakage Current (500μA~750μA) requirement set by safety regulations because the Equipment Earth Leakage Current is the total earth leakage current of each AC to DC power supply. Since equipment operators are usually ordinary employees, regulatory compliance sets such low leakage current to minimize hazard to operators. To meet the low leakage current requirement, a multiple outputs AC to DC power supply is widely used because it only consists of one front-end and multiple outputs that can be configured to meet the peripheral components voltage and power requirements.   
 
Figures 1 and 2 show the leakage current test results of the MEAN WELL NMP 1K2-HHEKC#-01, consisting of four outputs 24V, 12V, 48V, and 5V, and the total leakage current of four power supplies: MSP-600-24, MSP-300-12, MSP-300-48 and MSP-100-5.

The earth leakage current of NMP 1K2-HHEKC#-01 is 234μA at 230Vac, much less than the 856μA total Erath leakage current of the four MSP power supplies. Therefore, the NMP 1K2-HHEKC#-01 leakage current meets the 500μA~750μA leakage current requirement of the consumer electrical equipment.

Figure 1： Leakage current of 138uA under 120Vac
     Leakage current of 234uA under 230Vac


  Figure 2：Leakage current of 476uA under 120Vac
                  Leakage current of 856uA under 230Vac
 

 

2. High Accuracy of Output Voltage

Figure 3. UMP-400-48KJ_Voltage test

 

	Load	Output voltage	Open circuit voltage	Voltage accuracy
48V	1A	48.084V	48.120V	0.08%
15V	2A	15.060V	15.100V	0.26%
12V	3A	12.000V	12.020V	0.16%

Table 2. UMP-400-48KJ_ Test data
 

As shown in figure 4. UMP-400 has multiple combinations. However, due to the design of NID modules, some notes are needed.

1. NID modules are designed with a non-isolated buck converter. Input voltage must be greater than the output voltage, leading, NID35/65/100-24 must and only work when pairing with 48V front end.
2. Only the 4th channel (V4) can be used as a negative output voltage. As shown in figure 5, when NID35/65/100 form as a negative voltage, the input voltage must lower than 30Vdc, therefore, only UMP-400-24 can be used as a negative output voltage. 

 
Figure 4. Configuration of UMP-400



Figure 5. NID35/65/100 with negative output
 

  Modular power supply,NMP650/ 1K2 :  New Function Introduction