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HEIDENHAIN Power Supply
Brand: HEIDENHAIN -
Cat: Power Supply
Code:UVR 140D
| Combination name | Availability | Price |
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CNC Power Supply Unit – HEIDENHAIN UVR 140D
The UVR 140D is a CNC power supply unit (“CNC Power Supply Unit”) manufactured by HEIDENHAIN, designed to provide the regulated DC voltages required for the operation of HEIDENHAIN CNC control systems. The unit converts the AC mains voltage into one or more stabilised low-voltage DC outputs, powering the control logic, axis boards and peripheral modules of the system. Typically used in HEIDENHAIN TNC series numerical controls from the 1980s and 1990s, including the TNC 150, TNC 155 and contemporary variants.
The power supply unit is the energy core of the CNC system: without stable, regulated voltages the control cannot start up, the axis boards cannot operate and the encoder measurement system loses its reference supply. A power supply failure typically manifests as sudden control shutdown, power error messages or axis position instability, rendering the machine completely unusable until the component is replaced or repaired.
HEIDENHAIN (Johannes Heidenhain GmbH) is a German company founded in 1889 in Traunreut, a world leader in the manufacture of linear and rotary encoders, precision measurement systems and CNC numerical controls for machine tools. Power supply components from the TNC series of the analogue era and early digital systems are today legacy / discontinued: available exclusively as used parts, reconditioned units, or through specialist repair centres.
Main Technical Specifications
| Type | CNC power supply / supply module (CNC Power Supply Unit) |
| Part number | UVR 140D (UVR140D) |
| Brand | HEIDENHAIN (Johannes Heidenhain GmbH) |
| Known application | HEIDENHAIN TNC series CNC controls (1980s–1990s): TNC 150, TNC 155 and contemporary systems |
| Function | Conversion and regulation of supply voltages for the CNC control, axis boards and peripheral modules |
| Input voltage | ~220–240 V AC single-phase or three-phase |
| Output voltages | Multiple stabilised DC outputs: typically +5 V, ±15 V, +24 V |
| Protections | Overvoltage, overcurrent and short-circuit protection (typical) |
| Interfaces / connectors | Edge connectors and terminal strips for integration in CNC cabinet |
| Weight | ~1.0–3.0 kg |
| Dimensions | ~200–380 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
