Compact Laboratory Power Supply 0 ... 50V 0 ... 50A 2.5kW - DP50-50S

Deliver high power exactly where you need it: The compact DP-S Series laboratory power supplies are designed for testing, repair, and development tasks that require a portable power supply with substantial power reserves. Whether testing inverters, powering heating elements, or testing batteries and capacitor banks: The benchtop enclosure with a carrying handle facilitates flexible use at various workstations.

Voltage and current can be conveniently adjusted using separate coarse and fine controls. The digital control system supports constant-voltage and constant-current (CV/CC) operation with automatic switching based on the load. The standard USB port enables communication with Modbus RTU via a virtual COM port. Optional analog control inputs provide additional connectivity to your test setup.

Performance reserves for varying test tasks

Illustration of a DP-S laboratory power supply. Dimensions and design vary depending on the model selected.

The DP-S Series offers a practical alternative when a large stationary power supply is not required at the application site. The wide range of models allows you to select the appropriate voltage, current, and power ranges. For longer endurance tests, the following operating profile should be taken into account.

Continuous Operation and Temporary Full Load

The current operating status is displayed on the front panel. The cooling phase involves shutting down the output, not merely reducing power. The rated power and the specified cooling conditions for the selected model apply when designing your test cycle.

Coarse and fine adjustment for voltage and current
Two rotary controls each allow for quick setting of the desired range and subsequent fine-tuning. Bright four-digit LED displays show the voltage and current. Additional status indicators provide information on operating and error conditions.

Remote control compatible with your system
USB with a virtual COM port is included as standard in the current version. Analog control inputs for voltage and current, as well as an interlock loop, can be ordered as options. The analog connections are accessible from the front via a shielded connector, ensuring convenient integration even in tight test setups.

More Options for Your Application

Illustration of a DP-M power supply with an AP8 module. The expansion unit is custom-built to match the power supply and the application.

Integrated reverse-current protection and additional protection modules
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, the protection can be specifically enhanced. The power supply is not an energy sink with unlimited capacity. The required design depends on the reverse current, reverse voltage, and stored load energy.

Model AP9: Application-Specific Reverse Current and Reverse Voltage Protection
With the AP9, you can tailor the additional protection to demanding inductive or capacitive loads. The module is custom-manufactured to order for the expected currents, voltages, and energy levels. Options include a combined protection circuit against high reverse currents and reverse voltages—particularly reverse-polarity transients—or a design as an active braking chopper to convert regenerated energy into heat. The specifications and permissible duty cycles will be agreed upon to suit your test setup.

Model AP8: Additional output-side EMC filter with
capacitance. To meet increased demands on your load’s power supply, the AP8 combines a three-stage EMC filter with additional output capacitance. The module helps reduce conducted interference and stabilizes the power supply to demanding loads. The design takes into account the power supply unit, the load, and the desired dynamic response.

All AP modules are manufactured to order. The cabinet , and electrical specifications are tailored to your application.

Power Supply and Control Connections

Illustration of the DP-S series. The connections vary depending on the model, revision, and selected features.

Single-phase power connection
Even the more powerful DP-S models are powered by a single-phase supply. Depending on the model, C19/C20 connectors or appropriately rated connectors with pull-out protection are used. A suitable connection cable is included with the unit. For 6 kW models, a properly sized power supply with a 32 A fuse is required. The device-specific connection data applies.

USB with Virtual COM Port (Standard)
Connect the power supply to your computer via USB. The CH341SER driver provides a virtual COM port that allows you to set and retrieve output values using Modbus RTU. The device does not have a native RS-232 port. The documented protocol simplifies integration into existing control systems and custom test programs. This allows you to digitally integrate settings and measured values into your workflow.

[A1] Interlock loop (optional)
An open loop blocks the output; a closed loop enables it. This allows an external enable condition to be incorporated into the test setup. Output enable requires the device to be in the appropriate operating state.

[U] External analog control U (optional)
Specify the output voltage as 0 … 10 V (U1), 0 … 5 V (U2), or 4 … 20 mA (U3).

[L] External Analog Control I (optional)
The output current can be set to 0 … 10 V (L1), 0 … 5 V (L2), or 4 … 20 mA (L3). The analog signals are routed through the front-panel DIN connector. The matching connector is included with the unit if the appropriate configuration is selected.