White papers

The white papers cover a variety of topics related to product innovations, features and applications.

The authors are very often company employees who know how to explain the technical contents in detail. The articles are available here for download.

Click on the preview to see the white paper.

Decentralization: Selective current distribution and protection directly in the field.
September 2020

For many companies the power supply has been an obstacle on the path to consistent decentralization. In particular, where functions such as selective current distribution, protection and condition monitoring needs to be implemented, all while providing maximum reliability and uptime.

This White Paper will explain how you can achieve these requirements with an all-in-one power supply: the FIEPOS eFused series.

Download white paper: Decentralization made easy.

Guideline: Selection of safety standards for power supplies
November 2019

This "best practice" guideline covers the requirements for the basic safety of power supplies and should serve as a decision-making aid for the technical staff of the manufacturers and the professionally skilled users. It can be used to avoid wrong decisions, which are usually associated with high costs and loss of time, early.

The guideline was developed by the leading German power supply manufacturers - including PULS - as part of the ZVEI Transformers & Power Supplies Division.

Download the guideline from the ZVEI website

Connectivity: Power over Ethernet
August 2019

Would you like to benefit from the advantages of a PoE infrastructure in the industrial environment as well? In our white paper you will learn why most PoE injectors are not suitable for the harsh industrial environment and what functions are essential for an efficient and reliable device. Please fill in the form to download the PDF.

Download white paper: 30W PoE+ power and 1,000 Mbit/s on every channel

UL 61010 replaces UL 508 for industrial power supplies

The efforts in the United States to adopt international standards instead of insisting on national norms, has been a very positive move. In regards to power supplies, ANSI/UL 61010-1 and ANSI/UL 61010-2-201 have replaced the old UL 508 standard for industrial control equipment. This makes fulfilling the global regulatory requirements considerably easier for power supply manufacturers and their users. Learn more about the changes in our white paper.

Download white paper: UL 61010 replaces UL 508 for industrial power supplies

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EN 61010 – New standard for power supplies in industrial applications

The end of the EN 60950-1 will require power supply manufacturers to take action. Although the Official Journal of the EU cites EN 62368-1 as the successor to EN 60950-1, the alternative applicable standards of the EN 61010 series have significant advantages in the safety evaluation of industrial power supplies. Read our white paper to learn more.

Download white paper: EN 61010 – New standard for industrial power supplies

Short version

Full version

Value-add power supplies –​​​​​​​ Series efficiency meets client-specific flexibility  

The electronics industry expects reliability, speed and maximum flexibility from SMT placement machines. PULS Value-Add system solutions focus precisely on these attributes. Our tailored power supplies combine the advantages of standard and client-specific power supplies. See how ASM Assembly Systems profits from this solution.

Download white paper: Value-add power supplies

Efficiency of DIN rail power supplies – Small differences, great savings

When designing new products, a large part of the development work is dedicated to the minimisation of no-load losses in the form of heat. But how does this actually affect the user's cabinets?

Download white paper: Efficiency of DIN rail power supplies

Efficient redundancy for power supplies

Redundancy modules guarantee reliable system availability, even if a power supply fails. However, the decoupling diodes in the module lead to high power losses in form of heat and a large voltage drop. PULS replaces the diodes with efficient Mosfets.

Download white paper: Efficient redundancy

Accurate efficiency measurement is of interest to the customers

Modern power supplies are characterised by ever higher efficiency values. But can customers actually rely on the efficiency specifications listed in datasheets provided by the manufacturer? Can the customer measure such a thing by himself and what does he have to consider?

Download white paper: Efficiency measurement

Reliability: Specification of MTBF and service life for PULS power supplies

The terms ‘MTBF’ and ‘service life’ are often mixed up or used interchangeably. However, these refer to different processes and both values are needed to describe reliability. What they have in common is that higher temperatures make the values much worse. Learn more.

Download white paper: Reliability and service life

95.2% efficiency – World record for 240W power supply

The new CP10 series has the world‘s highest efficiency and the smallest dimensions in its class, maximizing its service life and MTBF. Numerous additional features provide ease-of-use in a wide variety of applications. Learn more about this fascinating product and the benefits for your work.

Download white paper: CP10

DIN-RAILway power supplies – A new standard in the railway sector

For those of you who have sat waiting on a train due to technical problems, you know only too well that more reliable technology on the railway should be the highest priority. A DIN-RAILway power supply is PULS's answer for a more robust and reliable DIN-rail power supply on the railway. 

Download white paper: Railway

Clock tower with PULS Power – Power supplies for the Mecca tower

When night falls in Mecca the green dials of the world’s largest clock tower are still clearly visible at a distance of min. 10 miles. This is achieved with two million LEDs – and around 1000 power supplies. 

Download white paper: Mecca tower

It can‘t always be lead capacitor-based buffer modules

Up to now, lead-acid batteries have been used almost exclusively in DCUPS systems for industrial installations. However, users have had to put up with the disadvantages of the limited lifetime, restricted temperature range and high weight of such batteries. 

Download white paper: Buffer modules


The development time for advanced designed power supplies is getting longer and longer. Teams of engineers have been working for years to develop new power supply platforms for market readiness. 

Download white paper: Cool design

Rediscovered and refined: Power supplies with Hiccup overload behaviour

Technological progress gives new life to a circuit rarely used in today‘s designs. PULS has rediscovered the old Hiccup mode and refined it into the Hiccupplus. 

Download white paper: Hiccup overload

Designing NEC Class 2 circuits with the PISA11 protection module

With the PISA11.CLASS2 module, several individual NEC Class 2 power supplies can be replaced by one large and more cost-effective power supply. The distribution into individual NEC Class 2 circuits is handled by the PISA protection module.

Download white paper: Protection module

Two DIN rail power supply concepts in comparison

It is important that the required characteristics of a device are specified with precision. The desire of the companies for costeffective solutions is understandable as well as necessary. For engineers, however, the task of specifying power supplies is becoming more and more difficult.

Download white paper: Two DIN rail power supply concepts

Benefits of digital technology of power supplies

In the ongoing development of power supplies, the analog control is reaching its limits. By using microprocessors, these limits can be raised and new levels achieved as users demand smaller, more efficient and more reliable supplies.

Download white paper: Benefits of digital technology

Increased efficiency with 3-phase power supplies

In development of new highly efficient 3-phase supplies, the challenge is to reduce not only the device cost, but also the total system cost. With 3-phase power supplies, substantial costs are involved with circuit breakers which are usually required to connect the device to the supplying mains.

Download white paper: Efficient 3-phase power supplies

Combining environmental protection and cost-effectiveness

The best way of actively promoting environmental and climate protection is undoubtedly to avoid unnecessary energy consumption and to use resources responsibly. See what PULS does to reach this goal.

Download white paper: Environmental protection and cost-effectiveness

Isolation of faulty 24V branches with miniature circuit breakers (MCBs)

Standard miniature circuit breakers (MCBs) are without doubt, one of the most efficient and economical ways to open circuits on faulty branches. MCBs are designed to protect wires and circuits. Learn more!

Download white paper: Miniature circuit breakers

How to increase the reliability of the 24V-bus voltage

Control systems are becoming more and more complex and sensitive and if the 24V power supply fails, the whole system shuts down resulting in loss of data, system down time or a long restart process. Learn how you can increase the reliability of the 24V bus voltage.

Download white paper: Increase the reliability

Power supplies for mains without a neutral wire

To avoid overloading of the neutral conductor, machine builders, panel builders and system integrators often use a Delta-system which has no neutral wire. Some machine builder standards, such as the EN 60204-1 for example, restrict the use of a neutral wire.

Download white paper: Mains without a neutral wire 

Sufficient voltage at the end of long cables

The sheer size of systems such as printing machines, conveyor belts, steel rolling mills or bottling plants require long cables connecting the individual electrical machinery and system parts.

Download white paper: Sufficient voltage at the end of long cables

Mounting options for direct panel or sideways installation

The DIN-rail mounting mechanisms for many of the DIMENSION C-series and Q-series power supplies as well as the special modules can easily be replaced by different mounting brackets. The ZM-parts enable direct panel mounting, wall mounting or sideways mounting of the units.

Download white paper: Mounting options

Switching power supplies connected to the intermediate DC-bus –​​​​​​​ New possibilities, new features

Power supplies for control systems and other applications are traditionally connected to either a 1-phase or 3-phase AC mains. Due to the increasing use of frequency drives and amplifiers, there is a new option of connecting the power supplies to the intermediate DC-bus of the frequency drive.

Download white paper: Power supplies connected to the intermediate DC-bus

Power supplies with significantly reduced inrush current

When electrical and electronic devices are switched on, they load the supply network momentarily with high current pulses. MCBs and breakers have to be designed for these peak currents to prevent nuisance trips or contact welding. 

Download white paper: significantly reduced inrush current

Spring clamp terminals – The solution for secure, reliable connections

The current design of spring clamp terminals offers many advantages relative to screw terminals. If you’re not familiar with this new connection technology, you may not recognize the benefits of this innovation at first glance and may lead you to choose traditional screw terminals.

Download white paper: Spring clamp terminals