XT40.242

PULS XT40.242 is a power supply unit part of the X-series, designed to function as an AC/DC PSU/converter with a semi-regulated 25% power reserve and a DC-OK relay contact output. It operates on a supply voltage of 3x432-528Vac (with nominal values of 440Vac, 480Vac, 500Vac, 525Vac; frequency 47-63Hz), a turn-on voltage of 3 x 390Vac, and a shutdown voltage of 3 x 355Vac. The unit is housed in aluminium, measures W96mm x H124mm x D159mm, and features screw-clamp connections for installation. It is rated for a current of 40A at 24Vdc and is designed for DIN rail mounting in a 3-phase (3AC) network. The ambient air temperature for operation ranges from -25 to +70°C. The XT40.242 has a peak inrush current consumption of 4A (at 3x480Vac input), a rated power of 960W at 24Vdc (1200W for typ. 15s), and includes protection functions such as output overvoltage protection (29.9Vdc max.) and overload/short-circuit current protection. It is not suitable for parallel operation to increase output power but supports 1+1 redundancy for higher system availability. The unit's efficiency is rated at 0.955 (at 3x480Vac input), with a 350ms start-up delay, and output voltage fixed at 24Vdc. The hold time is 2ms (at 3x480Vdc input), and power dissipation/losses are 45.2W (at full output load). Its electrical durability is rated at 51000 hours (at 40°C; 40A output; 3AC 480Vdc input) and 142000 hours (at 25°C; 40A output; 3AC 480Vdc input), with an output stage capacitance of 20000µF and a ripple of 1500mVpp.