DIN-rail based switching power supply with universal input 185…550 Vac single/2 /3-phase for industrial automation and process control applications. Input circuit technology makes these immune to overvoltage caused by faults in 3-phase networks with neutral, increasing the reliability of application.
This series offers greater reliability in industrial environments compared to single-phase power supplies. The input stage uses components with an operating voltage of 900 V, offering greater resistance to the voltage peaks present in industrial networks than single-phase components. The ability to operate from 185 to 550 Vac allows these power supplies to be used in both 230 V single-phase networks and 400 V 3-phase networks.

Suggested uses

• Wherever maximum flexibility of use is required in single- or 3-phase networks
• Applications in industrial automation and process control
• Uses with heavy loads
• Civil automation applications

Main features

• The 185…550 Vac extended range input is compatible with 230…240 Vac single-phase power, 208 Vac 2-phase and 400…500 Vac 2-phase and 3-phase for maximum adaptability to AC networks, eliminating the need for an isolation transformer.
• The 2-phase input offers reduced bulk, wiring, installation costs and panel space.
• Eliminates the need for a network voltage adaptation transformer.
• Versions with DC OK failure contact
• High efficiency reduces energy consumption and the operating temperature of components and allows use in small panels and severe environmental conditions.
• Large power reserve allows 5 seconds of current to be supplied at least +50% higher than the rated value, ensuring safety and reliability.
• The output is adjustable and protected against incoming surge from the DC line, and is equipped with electronic protection that turns off the output in case of an internal malfunction.
• Short-circuit and overload protection designed to supply peak currents of more than 150% of the rated value required by heavy loads, while the thermal protection prevents faults in case of prolonged overload with high ambient temperatures.
• Construction ensures excellent ventilation capacity of internal components, with reduced sizes and a degree of protection from accidental contacts of IP20 per IEC529.
• Thanks to their high performance and excellent ventilation, they are among the smallest on the market.

Greater reliability
This series offers greater reliability in industrial environments compared to single-phase power supplies.
The input stage uses components with an operating voltage of 900 V, offering greater resistance to the voltage peaks present in industrial networks than single phase components.
The ability to operate from 185 to 550 Vac makes these power supplies immune to
network faults: With the output powered at 230 Vac (1LN), in case of a short in another device connected to L2-N, the neutral is increased to around 400 Vac and the input is powered phase-phase until the protection is opened, which in most cases occurs within 300 ms; this is one of the most frequent causes of malfunction in 230 Vac single-phase power supplies in industrial environments (figures 1 and 2)

Another type of fault in 230 Vac single-phase devices with phase-neutral power is due to the accidental disconnection or interruption of the panel neutral by the plant neutral: with no return to the star point, the neutral increases to phase voltage and applies to single-phase loads of around 400 Vac, and malfunction is inevitable.

Typical application with 3-phase network with neutral. This is used to obtain a voltage of 230 Vac to power loads (a single lamp in the example) and power supplies.

A single short-circuit on the load will raise the neutral potential and all devices connected to it will be powered between two phases, i.e. at around 340…400 Vac rather than 230 Vac.