The DP120K-00005HV provides 0–120 kV at 0–0.5 mA and a rated power of 60 W. This combination is primarily intended for high-impedance test specimens with stringent requirements for the applied DC voltage. Applications of interest include insulation material research, testing of bushing prototypes, and electrostatic field tests. Material samples for high-voltage applications can also be compared at defined voltage points.
The DP-HV series combines constant-voltage and constant-current control with intuitive local or external operation. LED indicators and precision rotary controls facilitate on-unit adjustment and monitoring. Standard models and custom designs up to 300 kV are available for electrostatic applications, material testing, and industrial test setups.
Analog 0 … 10V control and measurement interfaces are included as standard equipment. When ordered with RS485, Modbus RTU handles digital communication instead of analog I/O. The standard interlock loop is retained in this version as well.
| Connectivity | Analog 0 … 10V control and measured value feedback are standard. Optional RS485 with Modbus RTU instead of analog I/O. The interlock loop remains intact. |
| Functionality | Constant-voltage and constant-current (CV/CC) operation with automatic switching. Local operation or external control. |
| Output configuration | Grounded output with positive or negative high voltage, depending on the version ordered. No remote measurement. |
| Safety | Protection against overvoltage, overcurrent, and overtemperature, as well as current limiting in the event of a short circuit. Standard interlock loop. |
| Accuracy | Voltage and current settings and display: ±0.5% FS, ±2 digits resolution; other specifications are listed by model. |
High Voltage in the Right Format
For laboratory workstations and racks
Illustration of a DP-HV power supply. The housing and connection configuration depend on the selected model.
The DP-HV series combines high output voltages with compact enclosures. A temperature-dependent fan control system adjusts cooling to match operating conditions. Depending on the model, the units can be used as freestanding units or mounted in a rack. The required rack mounts are included with the unit.
| Housing W × H × D, depending on the model | 323 × 110 × 367 mm; 440 × 110 × 360 mm; 443 × 136 × 500 mm; 460 × 136 × 580 mm |
| Installation and Setup | The dimensions of the selected model listed in the technical specifications are authoritative. |
Special versions may vary. The maximum values for the series include customer-specific units and are not achievable simultaneously with every standard model.
Full control over your testing process
Controlling High Voltage from a PC
Representative image of the software for the DP-HV series.
A simple Windows control software program is included with the DP-HV series and supports operation via the optional RS485 interface. Using Modbus RTU, you can set setpoints and read actual values. The documented protocol also makes it easier to integrate the system into your own test programs.
Tailor Protection to the Load
The output rectifier stage already provides basic protection against same-polarity reverse currents within the device’s permissible limits. For high-energy loads or reverse voltage transients, a suitable additional protective circuit must be provided. The power supply is not an energy sink with unlimited capacity. In particular, when switching off inductive loads and when discharging capacitors, current, voltage, and load energy must remain within the agreed limits.
Connection options
Analog Integration or Modbus Connection
Illustration of the back panel. The pin assignment depends on the configuration ordered.
Analog I/O (Standard)
Using 0 … 10 V signals, you can set the output voltage and output current and read their actual values. Four active-low open-collector outputs indicate voltage mode, current mode, error status, and the HV output status. A +15 V auxiliary reference with a maximum load capacity of 50 mA completes the interface.
Interlock Loop (Standard)
The loop on pins 9 and 10 is also present in models equipped with RS485. In local operation, a closed loop enables the output, while an open loop disables it. In remote operation, the loop controls the output externally. The operating and connection requirements for the ordered model are described in the manual.
RS485 with Modbus RTU (optional)
The digital version replaces the analog I/O. Analog setpoint input, measured value feedback, status outputs, and auxiliary reference are then not available in parallel. The interlock loop remains intact. This means that external output enable can also be used in the digitally controlled test stand.
DB15 Pinout for the Standard Analog Version
| Pin | Function | Signal / Power Handling Capacity |
|---|---|---|
| 1 | Voltage Specification | 0 … 10 V for 0 … 100% of the rated value |
| 2 | GND | Signal Ground |
| 3 | Current Setting | 0 … 10 V for 0 … 100% of the rated value |
| 4 | GND | Signal Ground |
| 5 | Actual Voltage Value | 0 … 10 V for 0 … 100% of the rated value |
| 6 | GND | Signal Ground |
| 7 | Actual Current Value | 0 … 10 V for 0 … 100% of the rated value |
| 8 | No function in REV1 | Leave unconnected |
| 9–10 | Interlock / Output Control | Closed-loop or open-loop; depending on whether the system is operating locally or remotely |
| 11 | Constant Voltage (CV) Operation | Open collector, active-low; maximum 35 V / 10 mA |
| 12 | Power Operation (CC) | Open collector, active-low; maximum 35 V / 10 mA |
| 13 | Error Status | Open collector, active-low; maximum 35 V / 10 mA |
| 14 | HV Initial Status | Open collector, active-low; maximum 35 V / 10 mA |
| 15 | Help Reference | +15V, maximum 50mA |
The table applies to the standard analog version. For devices with RS485, the corresponding digital pin assignment applies.




