* Optional. ** RS232 is not available on the DP100H-04PH, DP120H-033PH, DP100H-05PH, and DP120H-041PH models. On the other models, RS232 is not included when equipped with analog I/O.

The DP-PH Series high-voltage power supplies combine higher output voltages and lower output currents with the operating concept and digital interfaces of the DP-P Series. This provides you with a suitable foundation for high-voltage testing, development tasks, and automated laboratory applications, without having to sacrifice convenient setup and data acquisition.

The digital control loop continuously monitors voltage and current and automatically switches between constant-voltage and constant-current (CV/CC) modes depending on the load.

The initial values can be set and monitored via the front panel or via RS485 and, depending on the model, RS232 using Modbus RTU. Optional features include a LAN interface with server/client operation and, independently of that, an analog I/O package that replaces an existing RS232 connection and enables the control of voltage and current as well as the feedback of both actual values via 0 … 5 V, 0 … 10 V, or 4 … 20 mA.

DP-PH Series in Various Enclosure Sizes

Illustrative image.

Depending on the enclosure design, the devices can be used as freestanding units or mounted in a rack. The temperature-dependent fan control adjusts the cooling to the operating conditions. Rack mounts are included with the full-width devices. A shared rack slot for two half-width devices is available separately.

This classification describes the currently listed standard models. For special versions and for installation planning, the confirmed model dimensions are authoritative.

Software Suite for DP-P and DP-PH

Illustration of the software used to configure, monitor, and program the output values.

The software suite supports the configuration and recording of initial values, as well as the programming of repeated voltage and current waveforms. Connection is via digital interfaces; LAN is also available as an option. The serial interfaces use Modbus RTU. The documented protocol also enables integration into custom control solutions and LabVIEW applications. Regardless of this, the devices can still be operated via the front panel.

Integrated reverse current protection and additional protection modules
The output rectifier stage provides basic protection against reverse currents of the same polarity within the device’s permissible limits. This does not imply unlimited reverse current capability or suitability for absorbing arbitrary load energy. Reverse voltages, high reverse currents, and the stored energy of the load must be taken into account during design.

Model AP9: Application-Specific Reverse Current and Reverse Voltage Protection
The AP9 complements the integrated protection for demanding inductive or capacitive loads. The module is designed to order for the expected currents, voltages, and energy levels. Depending on the application, a combined protection circuit against high reverse currents and reverse voltages—particularly against reverse-polarity transients—or a design as an active braking chopper is possible. A braking chopper limits the energy fed back into the system by converting it into heat. The design, sizing, and permissible duty cycles are agreed upon on a case-by-case basis.

Model AP7: Additional input-side EMC filter
The AP7 supplements the existing power supply filtering with a three-stage EMC filter. It is designed for applications with increased requirements for reducing conducted interference on the power supply side. The single- or three-phase configuration and current-carrying capacity are selected to match the power supply unit.

Model AP5: Mechanical Isolation of the Load
The AP5 provides mechanical isolation between the power supply and the load or test bench. It supplements the electronic output control with a physical isolation point designed for specific applications. The specific protective effect depends on the overall safety concept of the system.

All AP modules are custom-built to order, with their enclosures and electrical configurations tailored to the agreed-upon requirements. The DP-PH series is not compatible with the AP6 or AP8.

High-Voltage Output and Control Connections

Illustration of a DP-PH power supply with a grounded output. The output configuration and pin assignments depend on the selected model and the ordered features.

Digital interfaces (standard)
, RS485, and, depending on the model, RS232 support Modbus RTU. The DP100H-04PH, DP120H-033PH, DP100H-05PH, and DP120H-041PH models do not have an RS232 port. For the remaining models, the RS232 port is not included when equipped with analog I/O.

LAN (optional)
Both RJ45 communication ports are RS485 by default. With the LAN option, one RJ45 port becomes a LAN port; the other remains RS485. The remaining ports remain unchanged. LAN can be configured for server or client mode.

Analog I/O (optional)
The analog package connects external voltage and current setpoints to the feedback of both actual values. Select a common signal standard for all four functions: 0 … 5V, 0 … 10V, or 4 … 20mA. The package replaces an existing RS232 port and can be ordered independently of the optional LAN interface.

Interlock Loop (Standard)
The 5V loop blocks or enables the output. Upon specific request, this function can be configured at the factory as an external output ON/OFF trigger. The user cannot switch between the interlock and ON/OFF trigger after the fact.

Status Output (Standard)
The status output indicates the device status: 0 V for an error or 5 V for normal operation. It should not be confused with the optional analog actual value outputs.

Models up to and including 1500 V come standard with a potential-free output. Models with higher voltages are supplied with a grounded output. The DP-PH series is designed for standalone operation and does not support Master/slave operation or the parallel or serial connection of multiple devices. Remote measurement is not supported.