Industrial power supplies
By Mary Del
Weidmuller recently introduced a new series of industrial power supplies. The PRO-H line is a new generation of high performance, DIN-rail mounted, single-phase power supplies designed to work reliably even under the most demanding conditions. A high power reserve guarantees reliable startup of loads with high inrush currents, such as motor starting applications, the company explains. The power supplies are available in nine models, ranging from 12 VDC through 48 VDC output voltage, and up to 25 A output currents. This voltage range enables the PRO-H power supplies to be used in virtually any single-phase application, according to the company. Features include integrated overvoltage temperature protection, available diagnostic output, external shutdown ability, a power OK signal, and remote On/Off functions. Two redundancy models are also included. Using a redundancy module and two PRO-H power supplies, users can configure a highly reliable, truly redundant power system without any additional components. This module enforces the equivalent sharing of the output current by each power supply. The system is fully redundant and provides output power even if one power supply has completely failed (for example, via a short circuit on the output). In the event that either power supply fails or is disconnected, the second unit will automatically supply the full current to the load. The redundancy of the system is monitored, and if lost is indicated by an alarm output. As an added benefit, the inputs are hot swappable and can be loaded up to 25 A each.