MEAN WELL RSD-150 Series 150W Railway Single Output DC-DC Converter

Features

• Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
• 2:1 wide input range
• Protections: Short circuit / Overload / Over voltage / Over temperature / Input reverse polarity
• 4000VDC I/O isolation
• Cooling by free air convection
• Half encapsulated
• Built-in constant current limiting circuit
• 1U low profile 36mm
• All using 105°C long life electrolytic capacitors
• LED indicator for power on
• 100% full load burn-in test
• 3 years warranty

Specifications

Technical Notes

1. All parameters NOT specially mentioned are measured at 24,48,110VDC input, rated load and 25°C of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1 µF & 47 µF parallel capacitor.
3. Tolerance: includes set up tolerance, line regulation and load regulation.
4. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to "EMI testing of component power supplies." (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
5. Strongly recommended that external output capacitance should not exceed 5000uF. (Only for: RSD-150-5/-12)
6. The ambient temperature derating of 3.5°C/1000m with fanless models and of 5°C/1000m with fan models for operating altitude higher than 2000m(6500ft).

Product Liability Disclaimer: For detailed information, please refer to https://www.meanwell.com/service Disclaimer.aspx

Mechanical Specification

Unit: mm, tolerance ± 1mm

Diagram showing the physical dimensions of the RSD-150 series converter. Key dimensions include length (189mm), width (77mm), and height (36mm). It also indicates mounting hole positions and terminal assignments for input and output.

Input Terminal Pin No. Assignment:

• Pin 1: DC INPUT V+
• Pin 2: DC INPUT V-
• Pin 3: FG

Output Terminal Pin No. Assignment:

• Pin 1: DC OUTPUT -V
• Pin 2: DC OUTPUT +V

Block Diagram

A block diagram illustrates the internal components and signal flow of the RSD-150 series converter. It includes an EMI filter, input protection, power switching, control circuitry, rectifiers and filter, and output stages.

Input Fuse

There is one fuse connected in series to the positive input line, which is used to protect against abnormal surge. Fuse specifications of each model are shown as below:

Input Reverse Polarity Protection

A MOSFET is connected in series to the negative input line. If the input polarity is connected reversely, the MOSFET opens and there will be no output to protect the unit.

Input Range and Transient Ability

The series has a wide range input capability. Within ±30% of rated input voltage, it can be executed at full-load operation and operate properly; with ±40% of rated input voltage, it can withstand that for 1 second.

Input Under-Voltage Protection

If input voltage drops below Vimin, the internal control IC shuts down and there is no output voltage. It recovers automatically when input voltage reaches above Vimin. Graphs illustrate the turn-on and turn-off voltage thresholds for different models.

Inrush Current

Inrush current is suppressed by a resistor during the initial start-up, and then the resistor is bypassed by a MOSFET to reduce power consumption after accomplishing the start-up.

Hold-up Time

Graphs show the hold-up time characteristics at various load percentages for different models.

Output Voltage Adjustment

This function is optional; the standard product does not have it. If this function is needed, please contact MEAN WELL for details.

Efficiency vs Load & Vin Curve

Graphs display the efficiency of various RSD-150 models across different load conditions and input voltages.

Parallel and Series Connection

A. Operation in Parallel

The RSD-150 series does not have a built-in parallel circuit. It can only use external circuits to achieve redundant operation but not increase the current rating. To add a diode at the positive-output of each power supply, the current rating of the diode should be larger than the maximum output current rating and attached to a suitable heat sink. This is only for redundant use (increase the reliability of the system) and users have to check suitability of the circuit by themselves. When using S.P.S. in parallel connection, the leakage current will increase at the same time. This could pose a shock hazard for the user. So please contact the supplier if you have this kind of application.

B. Operation in Series

RSD-150 can be operated in series. Positive and negative terminals are connected as shown in the diagrams. According to the connection, you can get the positive and negative output voltages for your loads. If the output voltage needs to be increased, you should add an external blocking diode to prevent the damage of every unit while starting up. The voltage rating of the external diode should be larger than the sum of the input voltages (V1+V2).

Overload Protection

If the output draws up to 105~135% of its output power rating, the converter will go into overload protection, which is constant current mode. After the faulty condition is removed, it will recover automatically. Graphs illustrate the overload region. Continuous operation within the overload region may cause over-temperature and reduce the life of the power supply unit or even damage it.

Over Voltage Protection

The converter shuts off to protect itself when the output voltage drawn exceeds 115~140% of its output rating. It must be repowered on to recover.

Over Temperature Protection

The converter shuts off to protect itself when the built-in temperature sensor mounted on the main power transformer senses a high temperature. The output recovers automatically if the temperature drops below the limit.

LED Indicator

Equipped with a built-in LED indicator, the converter provides an easy way for users to check its condition through the LED indicator. Green: normal operation; No signal: no power or failure.

Derating Curve

a. Single unit operation

If the unit has no iron plate mounted on its bottom, the maximum ambient temperature for the unit will be 55°C as operating under full load condition. It requires de-rating output current when ambient temperature is between 55-70°C, please refer to the de-rating curve as below. Graphs show load percentage vs. ambient temperature and rated current percentage vs. case temperature.

b. Operate with additional iron plate

If it is necessary to fulfill the requirements of EN50155 TX level that operate the unit fully-loaded at 70°C, RSD-150 series must be installed onto an iron plate on the bottom. The size of the suggested iron plate is shown in the diagram. In order for optimal thermal performance, the iron plate must have an even & smooth surface and RSD-150 series must be firmly mounted at the center of the iron plate. A graph shows the load vs. ambient temperature curve for this installation method.

Immunity to Environmental Conditions

EN45545-2 Fire Test Conditions