Programmable Electronic Loads

Since 1985 we have been manufacturing electronic loads for the automotive and power supply sectors. First with analogue control, since 2006 also programmable with various interfaces. We offer solutions for every application.

PEL97 Series

The microprocessor-controlled electronic loads of the PEL97 series meet all requirements for modern test concepts in research and development, as well as for test systems and manufacturing.
Batteries, fuel cells, hybrid drives - this series suits many applications.

Powerful current sinks from 150W to 6KW

In the basic version, we supply the current sinks as 19" plug-in units with RS232, RS485 and USB interfaces, including a comprehensive software package.

Optionally, the units are also available with LAN, CAN and GPIB interfaces, interoperable with SCPI commands.

A current, voltage, power and temperature limiter, as well as reverse polarity protection, are built in as safety features.

More features:

Load simulation for LED drivers

Battery test mode

Short-circuit function

Transient mode

dynamic testing

savable profiles

Curve charts

Long-term charts

Data export in CSV format

PEL97 and PEL98 Series

We offer programmable electronic loads with the PEL97 series from 150W to 6KW with:

• Voltage range: up to 600V
• Current range: up to 500A

The PEL98 series offers even more power!

Current sink PEL9714


Current sink PEL9718

6000W, 0-120A, 0-150V

Possible operating modes: CC, CV, CR, CW, CC+CV, CR+CW

Constant current - CC

Regardless of the input voltage, the current sink draws the set current.

Option charge and deep discharge protection

To protect the unit under test, the charge and deep discharge protection can be set as a safety option: The current is only drawn from the DUT when the switch-on voltage is reached, or the load switches off the input after reaching a maximum voltage.

Soft current rise option

Furthermore, a soft current rise can be set for the protection of the DUT: After the adjustable time has elapsed, the current sink automatically switches to CC operating mode.

Constant current at constant voltage - CC + CV

In the CC operating mode, the programmable electronic load can be set directly to the new operating mode by entering a value for the voltage.

Constant resistance - CR

In this operating mode, the current sink behaves like a fixed resistor. A charge and deep discharge protection for the device under test (DUT) can also be set here.

Constant resistance at constant voltage option - CR+CV

When the voltage reaches the set value, the voltage and resistance are held by the current sink, regardless of the voltage input.

Constant voltage - CV

At the set voltage the load draws the maximum current. With the PEL97 series, a soft start of the voltage can also be set in this operating mode, according to the set time, the voltage then increases slowly.

Constant power - CW

The electronic load consumes a constant power. If the input voltage increases, the current flow decreases accordingly. If the input voltage is too low, the current limitation becomes active. Again, additional charge and deep discharge protection can be set for the DUT.

Dynamic operation - Transient operation

In dynamic operation, the electronic load can be switched between two levels to determine the specific behavior of the DUT. The operation can be performed continuously, pulsed or triggered.

The width of Level A and B can be adjusted, as well as the current rise and fall (Rising and Falling, respectively).

Short-circuit function

In this operating mode, the maximum current is taken from the DUT. The process can be started from any operating mode and depends on the set value.

The current can be limited in the system settings.

Battery test

The charge delivered by the battery is calculated and displayed as a discharge curve. Current and time are adjustable, as well as a definable residual voltage at the battery. Various evaluation and documentation options are available.

Automatic list function

In addition to manual front operation, the electronic load can also be conveniently controlled via software. RS232, RS485 and USB are available as interfaces, optionally also GPIB and CAN.

Optionally, an automatic test with list function can be set on the front panel. Eight different programs (infinite via PC) with 200 test steps each are available on the front panel.

The values for current and time can be set individually.

Advanced automatic function test

In this operating mode, fully automated function tests can be performed. There are 50 test steps available in eight different programs (infinite on the PC).

At each test step the operating mode (CC, CV, CR, CW, load off, short circuit) can be set with the respective desired values.

More features:

• Test start via interface or trigger-in signal
• Step function for single tests
• Test stop at FAIL
• PASS/FAIL evaluation based on limit values (min/max evaluation)
• Result evaluation can be saved in database
• Output of data to Excel, printout also possible
• Evaluation via signal at trigger output
• and much more...
Wasserfuhr 5
59494 Soest
P: +49 2921 969 73-0