High-Voltage Power Supply 0 … 120 kV 0 … 0.0025 A 300 W – DP120K-0-0025HV

The DP-HV Series high-voltage power supplies deliver regulated DC voltage or constant current for electrostatic applications, insulation testing, and test setups in laboratories and industrial settings. The wide range of standard models and custom designs up to 300 kV allows you to select a power supply that matches your voltage range, load, and test procedure.

Easy-to-read LED displays, lockable precision rotary controls, and the option of local or remote operation support a well-organized workflow. Analog control and measurement interfaces are included as standard features. Alternatively, the device can be integrated into automated test stands via RS485 and Modbus RTU. The standard interlock loop remains available even in this digital version.

For laboratory workstations and racks

Illustration of a DP-HV power supply unit. cabinet and the 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.

The dimensions of the selected model are critical for installation planning. Custom versions may vary. The maximum values for the series include customer-specific units and cannot be achieved simultaneously with every standard model.

Digital Control and Data Logging

Representative image of the software for the DP-HV series.

With the optional RS485 interface, you can set output values digitally and read measured values via Modbus RTU. The included Windows software supports remote control and data logging. The documented protocol simplifies integration into your own test programs. This allows you to automate recurring tasks and record results in a traceable manner.

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.

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 allows the external output enable to be used even in a digitally controlled test stand.

DB15 Pinout for the Standard Analog Version

The table applies to the standard analog version. For devices with RS485, the corresponding digital pin assignment applies.