VT-NE31-17

Bosch Rexroth Indramat supplies the VT-NE31-17 as part of its VT-NE Power Supply Units series. This compact bipolar power supply feeds control electronics and sensor loops in industrial automation panels. It belongs to internal series code 17 and provides regulated positive and negative rails so analog amplifiers and servo controllers can share a common reference. The narrow housing and universal mounting arrangement allow stable DC power to be placed close to point-of-use loads, reducing wiring runs and electrical noise pickup.

The supply accepts an input range of 115/230 VAC ±10%, making it compatible with single-phase supplies commonly used in control cabinets. It operates at 50/60 Hz, so no line-frequency converter is required when equipment is installed in regions with either frequency. Under full load, the secondary supports a continuous current of 0.25 A. The regulated rails provide +24 VDC and -24 VDC for analog command circuits that require a symmetrical signal range around ground. A terminal strip accommodates the mains and DC conductors, and its screw clamps connect directly to shielded pairs or discrete leads. Filter networks on both outputs attenuate high-frequency ripple before it reaches sensitive comparators or analog-to-digital converters.

Each channel is rated at 6 W for powering transducers, reference sources, or small relays. Input protection is provided by a 0.8 A slow-blow fuse that tolerates inrush current but opens during sustained faults. Output ripple is less than 5%, limiting modulation errors in precision hydraulic or motion-control loops. The terminal strip accepts conductors with a maximum cross-sectional area of 4 mm². The enclosure can be secured with machine screws or snapped onto an EN 60715 rail to suit the panel layout. The dual, filtered outputs are housed in a compact chassis that weighs 1.1 kg. The unit can be stored at temperatures from -20 °C to +70 °C when it is not in operation.