VT-NE31-19

The VT-NE31-19 is a compact power supply unit produced by Bosch Rexroth Indramat within the VT-NE Power Supply Units series. It converts single-phase AC power into regulated DC power for analog control cards and servo amplifiers in industrial automation racks. The 19-inch format minimizes the required panel depth, allowing the unit to be installed close to sensitive control electronics while maintaining an orderly cabinet layout.

The unit accepts an input of 230 VAC ±10% or 115 VAC ±10%, allowing operation with European or North American supply voltages without taps or jumpers. It operates with industrial power systems at 50/60 Hz. Upstream protection is provided by a 0.8 A slow-blow fuse that disconnects the circuit during prolonged overloads while tolerating normal inrush current. The available output current is limited to 0.25 A, making the supply suitable for low-power analog circuits. Each output rail provides a continuous 6 W of power. Residual ripple remains below 5%, helping prevent power-supply noise from affecting analog reference signals. The terminals accept solid or stranded conductors with cross-sectional areas up to 4 mm², supporting secure wiring without specialized terminal hardware.

The bipolar output section provides a filtered +24 VDC rail for positive logic references and a filtered -24 VDC rail for complementary returns. The two outputs use a common reference and are electrically isolated from the AC input by the internal transformer. This dual-output arrangement supports differential amplifiers and servo valve drivers that require positive and negative excitation around a common zero point. The housing measures 84 mm wide, 70 mm deep, and 119.5 mm high, allowing installation in compact DIN-rail cabinets without obstructing nearby wiring ducts. The assembly weighs 1.1 kg and contains the magnetic components required to provide 12 W of combined continuous DC power.