Compact High Voltage DC Electronic LoadPLZ-5WH2 Series

Ideal for high-capacity power supply and rechargeable battery evaluation! Testing with hyper-realistic load simulation made possible!

The PLZ-5WH2 high power DC electronic load ser ies is where durable, reliable ingenuity meets multifunctional and high power design. Providing 5 variety of power range line-ups, from 1 kW bench top style model to high power model that can sink up to 20kW of power in a single unit. Possible to easily selects applicable power range depends on the load. Load simulation can be achieved faster than ever before thanks to the reliable, high speed design of the PLZ-5WH current control circuits. Accurate current measures can be made with extremely high setting resolution. A color LCD display allows for highly visible, user- friendly front panel operation. RS232C, USB, and LAN digital interfaces are included as standard for simple integration into any system.

Features

Arbitrary I-V Characteristics (ARB) Mode

In ARB mode, arbitrary I-V characteristics can be set by registering multiple I-V characteristic points (pairs of voltage and current values). Three up to 100 points can be registered, and the space between two points is linearly interpolated. The minimum voltage (0.00V) and current (0.00A) and the maximum voltage (1010.00V) are fixed.

Arbitrary I-V Characteristics (ARB) Mode

Operation Modes

The following five operation modes are available on the PLZ-5WH2. In addition, available to set in operation modes other than CV mode, the “UVPL*” setting keep the voltage less than UVP setting by controlling the current and the “UVPT” setting loads off by applying a current to reach the target setting voltage.*”UVPL” is the “+CV mode” in PLZ-5W series

Constant current
(CC) mode
When a current value is specified, the current is kept at that
value even when the voltage changes.
Constant resistance
(CR) mode
When a conductance value is specified, the product sinks current proportio-
nal to the voltage variation by using the value as a proportionality constant.
Constant voltage
(CV) mode
When a voltage value is specified, the product runs the current
so that the voltage is kept at that value.
Constant power
(CP) mode
When a power value is specified, the product runs the current
so that the power is kept at that value.
Arbitrary I-V characteristics (ARB) modeThe desired load characteristics can be set by specifying multiple
arbitrary voltage values and current values as I-V characteristics.
 

Maximum Slew Rate of 20A/μs

The PLZ-5WH2 series boasts a 20 μs rise time*, easily satisfying the critical needs of power supply evaluation tests demanding a fast transient response. *When using the PLZ20005WH2

Maximum Slew Rate of 20A/μs

Wide Ranging Operation Voltage up to 1000V

Operating voltage ranges from 10V to 1000V. Minimum operating voltage required to sink current is 1.5V.

Wide Ranging Operation Voltage up to 1000V

Parallel Operation

Up to 100kW with parallel operation (Max. 5 units)

Parallel operation (max. 5 units) is available on all models by simply connecting an optional parallel operation cable. This feature is available even among different models for a wide range of high power. (up to 100kW / 2000A)*A parallel cable needs to have each unit connection. 12kW and 20kW models are included in accessory. 1kW, 2kW and 4kW models are option.

Up to 100kW with parallel operation (Max. 5 units)

Parallel connection with PLZ-5WH series*

Must be PLZ-5WH as a Master and update the firmware to newest version. *When parallel operation between 5WH and 5WH2, only same capacity model is available.

ModelParallel operation numberMaximum currentMaximum power
PLZ20005WH22800A40kW
31200A60kW
41600A80kW
52000A100kW
 

Load On/Off

The following load on/off settings are available in addition to standard operations that can be carefully adjusted to fit the needs of any test environment.

  • Start with “load on” when power is turned on
  • Display elapsed “load on” time
  • Auto “load off” when time limit is reached
  • Control “load on/off” with external controls such as relays
  • “Load off” by specifying conditions (Cutoff function)

Cutoff Function

The cutoff function allows the user to enable load off once the elapsed time/voltage drop/integrated current/integrated power has been reached after load on. Multiple factors can be selected, with load off being implemented after the first requirement is met.

Elapsed timeThe load turns off when the elapsed time value reaches the
specified value.
Voltage drop*The load turns off when the voltmeter value reaches the
specified value.
Integrated currentThe load turns off when the ampere-hour meter value reaches
the specified value.
Integrated powerThe load turns off when the watt-hour meter value reaches the
specified value.

*Voltage drop cutoff operates in the same manner as UVPT of the UVP function.
UVP turns the load off based on the protection function, but the cutoff function
turns the load off when the specified conditions are met. As such, there is no need
to clear alarms, which is required when a UVPT is activated.

Changing the Response Speed

Set the response speed for CV, CR, or ARB mode according to the DUT’s conditions and application.

ItemDescription
ResponseVoltageSet the response speed for CV mode. Normal, Fast
ConductanceSet the response speed for CR mode. Normal, Fast
ARBSet the response speed for ARB mode. The value is the
filter response time. Select OFF for no filter.
OFF, 500 μs, 1 ms, 2 ms, 5 ms, 10 ms, 20 ms, 50 ms,
100 ms
 

Soft Start

Soft start is a function that controls the rise time of the load current. Soft start functions only when all the following conditions are met.

  • The rise time of the soft start has been set.
  • Load on state in constant current (CC) mode.
  • There is an input that is equal to or exceeds the minimum operating condition, from the state where there is no input to the load input terminals.

If the load current rises sharply, the DUT output may become unstable or the DUT’s overcurrent protection circuit may be activated. In such situations, it is possible to make the load current to rise slowly only when the product is started.

Soft Start

Operation modeCC
Time setting range500 μs, 1 ms, 2 ms, 5 ms, 10 ms, 20 ms, 50 ms,
100 ms, or off
 

Data Logging Function

Data Logging Function

The data logging function allows the user to log measurement values (current, voltage, power) in the internal memory, and display logged data on an LCD screen (Table) as a chart (Chart). By setting measurement recording conditions, you can control the timing that measurements are recorded

ConditionValueDescription
TriggerSet the measurement recording timing and the
number of times to record measurements.
SourceEvent (trigger source) that defines the measurement
recording condition. Recording starts after the
Initiate key is pressed and a trigger is received.
ImmediatePressing Initiate applies a trigger immediately.
BUSApplies a trigger when a *TRG command is
received from a PC or when the *TRG key on the
front panel is pressed.
DIGITAL2*Applies a trigger when a signal is received at pin
13 of the EXT CONT connector.
MSyncThe trigger application timing is synced between
PLZ-5WH2 that are synchronized
TALinkApplies a trigger when a step is executed if
Generate is set to TALink in the sequence step
settings
Load OffApplies a trigger when the load is turned off.
 Count1 to 65536The number of times to recorded measurements.
Delay0 μs to 100s
(resolution: 10μs)
The delay time from trigger application until
measurement recording.
IntervalDisable / EnableSets whether to insert an interval between
recordings when Count is 2 or higher.
Interval Time10μs to 3600s
(resolution: 10μs)
Recording interval time when Interval is set to
Enable.
Sense Aperture10μs to 1s
(resolution: 10μs)
Time period of each recording. The average over
the time period is recorded.

*Only when Direction of Digital 2 is set to Input

Integrated Data Function

Time elapsed, integrated current and integrated power can be logged. Logging (integration) can be coordinated to start/finish when the load turns on/off or during the start or end of a sequence. Logging can also be controlled arbitrarily.

Integrated Data Function

itemValueDescription
Integral Gate-Set the integrated data recording period.
NoneIntegrated data recording is started/stopped manually.
Load OnRecording is started/stopped automatically in synchronization
with load on/load off. Or, recording is started or stopped
manually.
Program RunRecording is started/stopped automatically in synchronization
with sequence execution start/stop.
Or, recording is started or stopped manually.
Reset-Selects the integrated data reset method. If the product is
restarted, inte-grated data is reset.
ManualIntegrated data is reset when the Reset key is pressed.
AutoIntegrated data is automatically reset before the start of
recordings. Or, integrated data is reset when the Reset key is
pressed.
 

Saving Measurement Data

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

Pulse Function

Pulse function refers to the operation of executing two settings repetitively. It is suitable for transient response characteristics testing of large capacity power supplies and batteries. When the pulse operation is in progress, a trigger signal is output from the TRIG OUT connector on the front panel. You can set this regardless of whether the load is on or off. This function operates in CC and CR modes. The pulse amplitude is set with a value or a percentage of the load value.

Pulse Function

When the pulse operation is in progress, a trigger signal is output for 10μs from the TRIG OUT connector on the front panel when the current amplitude changes from low (Depth) to high (Set) level.

a trigger signal

Operation modeCC and CR
Frequency setting range1.0Hz to 10.0kHz
Frequency setting resolution*1Hz to 10Hz0.1Hz
11Hz to 100Hz1Hz
110Hz to 1000Hz10Hz
1.1kHz to 10.0kHz0.1kHz

* (Reference) The resolution actually set in the device is period resolution △T = 1μs,
as shown in the equation below. For example, if you specify 9300Hz, the period set in
the device will be n × △T = 108 × 1μs = 108μs (where n is a number set in the device).
Converted to frequency, this becomes 1/108μs = 9259Hz.

Sine Function

The sine function varies the current sinusoidally. It is suitable for super- posed ripple testing of large capacity power supplies and batteries. When a sine operation is in progress, a trigger signal is output from the TRIG OUT connector on the front panel. You can set this regardless of whether the load is on or off. This function operates in CC mode. You cannot set the slew rate. Set the sine amplitude with a value.

the load

When a sine operation is in progress, a trigger signal is output for 10μs from the TRIG OUT connector on the front panel when the current passes through the Set value on the rising edge (sine wave phase at 0 degrees).

Sine Function

Operation modeCC
Frequency setting range1Hz to 1kHz, 2kHz, 5kHz, 10kHz
Frequency
setting
resolution*
1Hz to 10 Hz1Hz
20Hz to 100Hz10Hz
200Hz to 1000Hz100Hz
1000Hz to2kHz, 5kHz, 10kHz

* (Reference) The resolution actually set in the device is period resolution △T= 20μs,
as shown in the equation below. For example, if you specify 900Hz, the period set in the
device will be n × △T = 56 × 20μs = 1120μs (where n is a number set in the device).
Converted to frequency, this becomes 1/1120μs ≈ 893Hz.

Sequence Function

A sequence consists of programs and steps. A program is a collection of steps. Steps are executed in order one at a time, star ting from step 1. The completion of the last step signifies that the program has been executed once. When the specified number of program loops is completed, the sequence ends. You can set the load state (load on or off, load value, slew rate) at the end of the sequence of a program.

Setting rangeSettingDescription
By stepLoad valueCurrent, conductance, voltage, power. The values that
can be set depend on the current operation mode.
Slew rateSets the speed of change when the current is changed.
Step execution
time
0.000050 s to 3600000 s (50μs to 1000h),
resolution: 1μs
Load on/off controlTo turn the load on, set the load setting transition
method to step or ramp.
OtherTrigger signal setting, trigger signal output
For each programNumber of loops
of program
1 to 100000 repetitions, or infinite repetitions.
Protection functionSpecifies the value at which a protection function
(OCP, OPP, UVP) is activated.
 
TALink

The TALink (Transient Acquire Link) trigger makes it possible to log data in PLZ-5WH2 in synchronization with the sequence steps. Logged data can then be accessed through ommunication with the PLZ-5WH2 and saved to a USB as a CSV file./p>

TALink

Alarm Function

This function detects anomalies and protects the DUT. There are two types of alarm based on urgency level: alarm 1 (high urgency) and alarm 2 (low urgency).

Alarm 1 (high urgency)
NameActivation
Overvoltage detection (OVP)Load off
Reverse-connection detection (Reverse)
Overheat detection, overcurrent detection of the front-panel
DC INPUT terminals (OTP/Front)
Alarm input detection (External)
Parallel operation anomaly detection
 
Alarm 2 (low urgency)
NameModeActivation
Overcurrent protection (OCP)CR, CV, CPLoad off or limit
Overpower protection (OPP)CC, CR, CV, ARB
Undervoltage protection (UVP)CC, CR, CP, ARBLoad off, limit, or activation off
Watchdog protection (WDP)AllLoad off
 

This function limits the current (UVPL) or turns off the load (UVPT) when the voltage applied to the product becomes equal to or less than the UVP setting. You can set this regardless of whether the load is on or off.

TripTurns the load off. The setting display changes to UVPT.
LimitLimits the voltage so as not to become equal to or less than the set value.

The setting display changes to UVPL.
 

ABC Preset Memories

Three setting values can be stored in preset memory slots A, B, and C. All saved settings can be accessed at the press of a button, which is perfect for when you want to quickly switch between three sets of values.

Setup Memory

The setup memory can store up to 20 sets (0 to 19) of the current conditions of the items listed below. The current conditions can also be saved in a USB memory device.

  • Operation mode
  • Load values (current, voltage, conductance, power)
  • Slew rate
  • Pulse amplitude (current/conductance or percentage)
  • Pulse interval (frequency/time of one cycle and duty cycle/operating time on the high side)
  • Sine amplitude (current)
  • Sine frequency
  • Alarm operating conditions
  • Content of ABC preset memories

A file saved on the PLZ-5WH2 can be transferred to the PLZ-5W via a USB memory device. If the UVP is set to “limit” on the PLZ-5WH2, this will be changed to +CV mode on the PLZ-5W (PLZ205W, PLZ405W, PLZ1205W).

External Control

The PLZ-5WH2 can be controlled and monitored from an external device. The external control terminals are isolated from the load input terminal.

External Control

Current and Voltage Monitor

In addition to the conventional current monitor output, voltage monitor output (0 V to 10 V/Output of 1/100 of measured voltage) has been added to the front BNC connector.

USB Keyboard

USB Keyboard

You can enter numbers/characters if you connect a keyboard to the USB port on the front panel. The types of keyboards that you can use are 101-key and 104-key keyboards.

Remote Sensing

With remote sensing, the voltage measurement point can be changed from the load input terminal to the DUT sensing point. By connecting the sensing leads to the DUT, the effects of voltage drops caused by resistance in the load cables can be reduced and the operation in CR / CV / CP / ARB mode stabilized. ● Remote sensing input rated voltage: 1000 V

Communication Interface

LAN, USB and RS232C standard digital interface. *GPIB Option

Communication Interface

Synchronized Operation

The following synchronization features are available when simply connecting the PLZ-5WH2 with other equipment using a communication cable. Any of the models in the PLZ-5WH2 series can be connected together. Synchronized operation is possible even during parallel operation.

  • Synchronizing load on/off among multiple pieces of equipment
  • Synchronizing measurements.
  • ynchronizing the start time and resume time for sequences across multiple units.

Synchronized Operation

Applications

Battery Discharge Testing

Battery Discharge Testing

Battery discharge test can be conducted and results saved without a PC. The acquired data can be saved in CSV format on USB memory.

EV Charger Aging Tests

EV Charger Aging Tests

7 LV124 Standard L-02 Life test – high-temperature endurance test (Durability – Heat)
[Life test]

DC-DC Converter Evaluation

DC-DC Converter Evaluation

DC-DC converter performance tests vital for automotive electric components can easily be carried out by controlling the converter input (DC power supply) and output (DC electronic load). The DC power supply and electronic load can be started up simultaneously for variation tests and efficiency tests.

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