High-Capacity Regenerative Electronic Load

For progressive

PXZ Series

PXZ Series

electric applications

This high-capacity regenerative electronic load series contributes to carbon neutrality!
Its highly efficient power regeneration reduces energy loss.

Rated power of 20kW in 3U
Regenerative efficiency of over 90% (on-site regeneration)
LAN, USB, S232C, external analog control (isolated type) as standard *GPIB optional

High-Capacity Regenerative Electronic LoadPXZ Series

The PXZ series of highly efficient, reliable, high-capacity regenerative electronic loads has a rated power of 20kW in 3U. In addition to the constant-current, constant-resistance, constant-voltage, and constant-power operating modes, this series has an I-V characteristic function that allows the user to set arbitrary I-V characteristics for each CC and CV operating mode. The series is also equipped with various functions, such as sequence, pre-charge, synchronous operation, pulse, sine, and VMCB functions.

LAN, USB, and RS232C communication functions are included as standard, allowing easy integration into various evaluation systems. The PXZ series is highly scalable, and its capacity can be increased up to 200 kW when operating in parallel (up to 10 units).

1500V

DC input maximum voltage: 1500V high voltage compatible.

Regenerative Efficiency of
Over 90 %

Regenerates power with an efficiency of 90 %or higher and load power of 6 kW or more.

external analog control standard

LAN, USB, RS232C, external analog control (isolated type) standard.

ZOOM
ImageModelDC Input rating powerDC Input operating voltageDC Input rating currentInput current
AC (200 V 3-phase) / (400 V 3-phase) A
Weight
PXZPXZ20K-50020kW10V~500V120A80/40AApprox. 38kg
PXZPXZ20K-150030V~1500V30A80/40AApprox. 37kg

Features

Regenerative Efficiency of
Over 90%
* At Rated Input

Thanks to high-performance switching technology, the PXZ series regenerates power with an efficiency of 90 % or higher (maximum regenerative efficiency of approximately 95 %) and load power of 6 kW or more. Since the regenerated power can be reused, carbon dioxide emission is significantly reduced.

Please note that this product is designed for on-site regeneration. (This is not a grid-connected device that returns the power to the grid.)

Regenerative Efficiency of Over 90 % (At Rated Input)
Regenerative Efficiency of Over 90 % (At Rated Input)

The Value of Regenerative Power Is Visible at a Glance!

Regenerative Efficiency of Over 90 % (At Rated Input)

A large LCD display shows regenerative power value in real time. Energy-saving benefits are visible at a glance.

* The displayed power value is for reference only and may differ by up to ±500 W.

Wide Operating Range With an Expansion Ratio of 2.25 to 3 Times

The PXZ20K-500 has an operating range of 10 V to 500 V, while the PXZ20K-1500 has a range of 30 V to 1500 V. An operating area ranges from 2.25 to 3 times the expansion ratio.

Wide Operating Range With an Expansion Ratio of 2.25 to 3 Times

Five-Step Slew Rate Switching

In CV and CC modes, the speed at which the current or voltage changes can be set. This allows the user to set the optimum test conditions for DUT applications.

Five-Step Slew Rate Switching

* Slew rate works in the following cases:

  • When the current or voltage value changes after changing the setting value.
  • When the current or voltage value is changed using external control.
  • When the current or voltage value is changed by turning the load on.
  • When the load is turned off.
Five-Step Slew Rate Switching-table

Operating Modes

The PXZ series has four operating modes. In addition, the I-V characteristic function can be set in the CC and CV modes.

CC

DCNormal input mode. Current is controlled by the current set value.
PULSEControlled by pulse function.
SINEControlled by sine function.
I-VControlled by arbitrary I-V characteristics.
EXTThe current set value is controlled by an external voltage. The external voltage input to EXT CONT is treated as an absolute value and applied to the current set value.

CR

OFFNot controlled by conductance set value.
DCNormal input mode. Current and voltage are controlled by the conductance set value.
PULSEControlled by pulse function.
EXTThe conductance set value is controlled by an external voltage.

CV

DCNormal input mode. The voltage is controlled by the voltage set value.
PULSEControlled by pulse function.
SINEControlled by sine function.
I-VControlled by arbitrary I-V characteristics.
EXTThe voltage is controlled by external voltage.

CP

DCNormal input mode. Power is controlled by the power set value.
EXTThe power set value is controlled by an external voltage.

Equipped with touch panel display

By pressing or swiping the display with a finger, the user can select an item on the screen or set a numerical value. The display is pressure-sensitive and can be operated even with gloves on.

Priority Operation Mode

Immediately after turning on the load, the preferred operating mode can be set from CC, CR, and CP. When the input from the DUT reaches the set value, the operating mode switches automatically according to the DUT status. If the voltage of the connected DUT is higher than the voltage setpoint of the PXZ series, current flows from the DUT to the PXZ series. Select CC if a battery or power supply is connected as the DUT.

Contributing to Carbon Neutrality

The calculations were made assuming the maximum load power is 20kW, and the device operates continuously for one month.

pxz eco table

▲Comparison of PXZ20K-1500 and PLZ20005WH2 (without regenerative function)

The PXZ series can effectively regenerate the load power without dissipating it as heat. CO2 emissions can be reduced by approximately 5.67 tons per month (CO2 emission factor*: calculated with 0.438 kg [per kWh]). Furthermore, because the heat dissipation of the main unit is very low, the air conditioning costs can be significantly reduced.

* The CO2 emission factor is based on the national average for electric utility companies (FY2022 results) published by the Ministry of the Environment Government of Japan.

Contributing to Carbon Neutrality

External Control Function

The EXT CONT connector on the rear panel can be used to control the PXZ series with external devices. The general-purpose digital input and output terminals can be assigned any function, facilitating system construction in combination with other measurement devices. Digital I/O is standard for both NPN and PNP-type PLCs. Analog I/O is isolated from output terminals as standard, allowing safe analog control from PLC.

External Control Function
MethodFunction
Analog inputVoltage and current value settings
Analog outputMonitoring of voltage and current values
General-purpose isolated digital input
(Ch.1 to ch.5)
*Photocoupler isolated input
(Supports both current sink and source)
• Load on/off
• LOW alarm on/off
• Start/stop integration measurement
• Reset integrated value
• Input the measurement trigger
• Recall settings from preset memory
Digital input (Ch.6)Generating HIGH alarm (fixed)
General-purpose isolated digital output
(Ch.1 to ch.6)
*Semiconductor relay output
• Monitor the load on/off status
• Monitor the power on
• Monitor the alarm
• Monitor the operation mode
• Monitor the preset memory
Terminal No.MethodI/ONameDescription
1DigitalOOUT Ch.1General-purpose output terminal
2DigitalOOUT Ch.2General-purpose output terminal
3DigitalOOUT Ch.3General-purpose output terminal
4--DO COMDigital output common
5--DI COMDigital input common
6DigitalIIN Ch.1General-purpose input terminal
7DigitalIIN Ch.2General-purpose input terminal
8DigitalIIN Ch.3General-purpose input terminal
9-O+12V OUT12 V reference voltage available for digital input
10---Not used
11--A COMAnalog signal common
12AnalogOVMONVoltage monitor
13AnalogOIMONCurrent monitor
14DigitalOOUT Ch.4General-purpose output terminal
15DigitalOOUT Ch.5General-purpose output terminal
16DigitalOOUT Ch.6General-purpose output terminal
17--DO COMDigital output common
18--DI COMDigital input common
19DigitalIIN Ch.4General-purpose input terminal
20DigitalIIN Ch.5General-purpose input terminal
21DigitalIH ALARM INHIGH alarm EXT HIGH occurrence
22--12V COM12 V reference voltage common
23--A COMAnalog signal common
24AnalogIEXT CVVoltage control in the constant voltage mode
25AnalogIEXT CC/CPCurrent control in the constant current / power modes

General-purpose isolated digital input terminals are available for Ch.1 to Ch.5. Any setting value from the items listed on the right can be selected.

General-purpose isolated digital input terminals

General-purpose isolated digital output terminals are available for Ch.1 to Ch.6. Any setting value from the items listed on the right can be selected.

General-purpose isolated digital output terminals

Sequence function

Preset operations can be run continuously. A total of 30 programs and up to 10,000 steps can be created for all programs. Programs stored in the unit’s memory, and data can be exported to a USB memory stick from the front panel.

Sequence function

Pre-charge Function *

The pre-charge function allows 5% of the rated current to flow in CC mode until the set CV voltage is reached. This function can be used to charge DC link capacitors during inverter evaluation in OBC development or charge the DC link capacitor for DC/DC converter evaluation to a desired voltage before starting discharge tests. This suppresses inrush current and prevents battery and DUT device deterioration. In addition, when conducting system verification with the PXZ as a battery simulator, the pre-charge function can be used to raise the voltage to a set level in advance, avoiding a situation where the test cannot be started due to false system diagnostics (wire breakage, battery failure, etc.).

* The interlock must be released and precharge enabled.

Pre-charge Function *

I-V characteristic function

By registering multiple arbitrary points on the I-V characteristics, arbitrary I-V characteristics can be set for each CC and CV operation mode. Arbitrary points can be registered from 3 to 100, making it possible to simulate the I-V characteristics of rechargeable batteries and other devices.

I-V Characteristic Function
  • Regenerative DC Electronic Load
  • PXZ SERIES
  • Regenerative DC Electronic Load
  • PXZ SERIES

Equipped with Standard LAN Interface and VMCB Function

The PXZ series is equipped with LAN, USB, and RS232C interfaces as standard features. By using the feature of virtual multi-channel bus (VMCB), it allows you to control remotely and monitoring for 1-to-N as well as N-to-M for large-scale networks. This feature can also be used to save communication ports or to synchronize the control timing of multiple PXZ series units (up to 8 units). The PXB series manufactured by our company can also be mixed and matched for multi-channel connection.

When connecting the VMCB master unit via LAN

When connecting the VMCB master unit via LAN

Communication monitoring function

This function monitors the communication status. For example, the alarm will be activated and the output will be turned off when the LAN cable is disconnected and the communication is not being confirmed within the specified time of setting. This function protects the operation from the uncontrolled condition, and it improves the system reliability.

Security for LAN connections

Security for LAN connections

Access to the built-in web server can be restricted with a password. Also, when using VXI-11, HiSLIP, and SCPI-RAW for control, host restrictions can be set with the IP address. It is possible to prevent access from any terminal other than the ones registered as a host (up to 4 hosts can be registered).

Up to 10 Units can be Operated in Parallel, Achieving 200 kW *

Including master machine, up to 10 units (200 kW) can be operated in parallel. Connection is with one-control parallel operation, and the panel of the master machine can control and display the entire system. With the automatic recognition function, the need for complicated settings is eliminated, allowing the construction of high-capacity systems.

* Parallel operation is possible between models with different input rated voltages.
★ Please contact us if you wish to operate more than 10 units in parallel.

Up to 10 Units can be Operated in Parallel, Achieving 200 kW

Data logging function:

The data logging function allows the user to log measurement values (voltage, current, power, elapsed time, integrated current, and integrated power) in the internal memory, and display logged data on a list and graph forms. By setting measurement recording conditions, you can control the timing that measurements are recorded.

Synchronized Operation

Synchronized Operation

When the PXZ series units are connected to each other with a synchronous operation signal cable, load on/off measurement and sequence synchronous operation can be performed from any of the PXZ series devices. Any of the PXZ series models can be connected to each other. Synchronized operation is possible even when devices are operating in parallel.

  • Synchronizing load on/off of multiple devices.
  • Synchronizing measurements.
  • Synchronizing the start time and resume time for sequences across multiple units.
Data logging function:

Connect the OUT connector and IN connector of the EXT SYNC with a synchronized operation signal cables.

Saving Measurement Data

Measurement data can be stored in CSV format to a USB memory device.

Selectable power input

Three-phase 3-wire 200 V or Three-phase 3-wire 400 V models are available. Devices can be adapted to the international power supply requirements.

Reliable and solid performance even under high temperatures

Solid performance under operating temperatures of 0°C to 50°C (32 °F to 122 °F). Full performance even in harsh ambient temperature environments, such as when installed in equipment.

Reliable and solid performance even under high temperatures

Safety Protection Function

  • OVP (Over Voltage Protection)
  • UVP (Under Voltage Protection)
  • WDOG (Communication error protection)
  • OPP (Over Power Protection)
  • OCP (Over Current Protection)
  • EXT LOW (External input alarm detection)

Rear Panel

Rear Panel

Specifications

ZOOM
ImageModelDC Input rating powerDC Input operating voltageDC Input rating currentInput current
AC (200 V 3-phase) / (400 V 3-phase) A
Weight
PXZPXZ20K-50020kW10V~500V120A80/40AApprox. 38kg
PXZPXZ20K-150030V~1500V30A80/40AApprox. 37kg

Line-up

Options

For detailed optional products, please check the individual product page.

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