Illustration of PS-260 powering Lynx-3510

The Role of Power Supplies in Industrial Applications

Power supplies are essential components in industrial systems and without them operations come to a standstill. Westermo devices feature dual power inputs—primary and secondary—ensuring uninterrupted operation in case of one power source fails. Selecting the right power supply and understanding your power requirements are critical first steps in system design and continuous operation.

A power supply converts AC from the grid into DC suitable for industrial devices. The distinction between power supplies for IT and OT environments lies in their design, durability, and specifications. Industrial power supplies are a must for an OT application to ensure that power remains constant for critical infrastructure.

Often powering OT equipment, AC must be converted to DC. Connecting an AC power supply to a Westermo product that does not support AC can cause irreparable damage and void the warranty. Always consult the installation guide before connecting power.

Westermo's Power Supply Solutions

Most Westermo products support DC inputs ranging from 9 to 110 volts. With most devices operating between a 24–48VDC range. For specific requirements, such as Power over Ethernet (PoE), certain devices like the Lynx 3500 PoE series require 24–54VDC, with PoE functionality necessitating between 48-54VDC supply.

Westermo offers two power supply options:

• PS-60: A versatile solution for most applications, delivering 24VDC
• PS-260: Designed specifically for PoE applications, this power supply pairs seamlessly with the Lynx 3500 PoE series

 
Image of PS-260 powering Lynx-3510

PS-260 and Lynx 3500 PoE Series: The Perfect Match

For PoE-enabled devices, two key factors must be addressed: The power supply must output the correct voltage (48-54VDC). It must meet the device’s maximum PoE power requirements. 

For the Lynx 3510, which supports up to 8 PoE ports, the maximum PoE power consumption is 240W. This means the power supply must provide 240W for connected devices plus sufficient power for the Lynx itself. It is very common that other industrial power suppliers often are not sufficient for full PoE output. 

The PS-260 is engineered for this purpose, delivering up to 260W, with up to 20W reserved for the Lynx itself. This ensures that the Lynx and all connected devices receive adequate power, even under maximum load. 

When calculating power requirements, include the consumption of all connected devices as well as the networking equipment itself. For non-PoE applications, many industrial devices require minimal power.

Rigorous Testing for Extreme Environments

Industrial environments are often electrically noisy, with interference from pumps, train tracks, breakers, and other equipment. Westermo products undergo stringent testing to ensure reliability under such conditions. 

Tests includes:

• Temperature cycling to validate operation in extreme heat and cold
• Vibration testing on all axes
• Detailed assembly checks, such as ensuring flawless soldering

Westermo products fulfil rigorous standards, such as EN/IEC 61000-6-2 (immunity for industrial environments) and EN/IEC 61000-6-4 (emission standards). They are also approved under EN 50121-4 for railway signalling and telecommunications, allowing installation within one meter of train tracks. 

Since PoE applications are diverse, it is important to not only take into account the total consumption, but the installation itself.

Standards and Compliance

Westermo prioritises approved by certifications rather than compliance to claims. This means products are independently tested by accredited bodies, ensuring reliability and safety. For PoE-enabled devices, adherence to standards like IEEE 802.3af (15W per port) and IEEE 802.3at (30W per port) is critical. 

Taking it a step further, the PS-260 and Lynx 3510 fulfil these stringent standards. For PoE installations, it is vital to use properly certified power supplies, to ensure your network is reliable and robust. Non-standard power supplies can cause severe damage to both the PSU and connected devices, leading to loss of service.

Designed for PoE solutions

When designing PoE systems, it is often overlooked the measures to be taken to ensure that it meets IEC 60950-1 industrial equipment standards. PoE is categorized as a TNV-1 circuit, meaning it must withstand overvoltage risks while maintaining safety as part of a SELV circuit (Safety Extra Low Voltage). 

The PS-260 supports both SELV and TNV-1 requirements. This makes the PS-260 and Lynx 3510 a robust and reliable solution for true-to-specification PoE installations.

Elevating Dielectric Strength Standards

In today's technological landscape, the safety and reliability of power supplies are crucial. The PS-260 excels with its superior dielectric strength, offering 1500VAC from output to protective earth—significantly higher than the commonly found 500VAC. 

When distributing power through an Ethernet cable, especially in Power over Ethernet (PoE) applications, the cable often extends beyond the equipment room, potentially reaching another building. The IEC60950-1 standard addresses this scenario, requiring a TNV-1 circuit with a dielectric strength of 1500VAC for output to protective earth. This requirement is uncommon but essential for ensuring safety and reliability. By providing a dielectric strength of 1500VAC, it ensures compliance with IEC60950-1, enhancing safety and reliability.

Making an Informed Choice

When selecting a power supply, it is extra important to consider many things. The PS-260 prioritizes safety, reliability, compliance with international standards, and dialectic strength making it a smart choice for your power supply needs. 

In combination with the Lynx 3000 PoE series, The PS-260 sets a new benchmark in the industry. Choosing the right supply for application ensures protection and reliability is the most critical and vital environments for modern society.