https://global.kikusui.co.jp/

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Electronic Load

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Multifunctional Electronic Load

PLZ-4W Series

Four different power ratings - 165 W, 330 W, 660 W, and 1000 W - five models in total
Support of 0-V input (PLZ164WA and PLZ664WA)
High-speed response supporting a maximum slew rate of 16 A/μs (equivalent to 10 μs when converted to a rise time)
Support of constant current, constant resistance, constant voltage, constant power, constant current + constant voltage, andconstant resistance + constant voltage modes
Timer functions combined with time/voltage measurement functions enable battery discharge characteristic evaluations.
Booster units provide increased system capacity (PLZ1004W).
Features sequence and switching functions.
Provided with GPIB, RS232C, and USB 2.0 ports as standard.

Effective
measurement ofhighly efficientswitching power
supplies

CP pulse
discharge for
digital camera
batteries

Actualload sequences
for mobile
phone charging
circuits

Perfect for a wide rangeof testing applications

Evaluationof low-voltage,high-current
DC/DC converters
for servers
Evaluationof AC
adapters

2

P L Z -4W

SERIES

Evaluation offuel cells
and stacks
Performance
evaluation of DC/DC
converters
for PDAterminals

For testing switching power supplies, batteries, DC/DC converters, and fuel cells!
Multifunctional DC Electronic Load
PLZ-4W Series
Designed to satisfy demands
for lower-voltage, higher-speed, andlarger-capacity testing applications

Minimumsetting
resolution of
10 µA(for PLZ164/164WA L range)

High-speed
operation at
10 µs(when converted to riseand fall times)

Support of0-V input(PLZ164WA and PLZ664WA)

Support ofup to 9 kW/
1800 A(System configured with
PLZ1004W and PLZ2004WB)

GPIB,
RS232C, andUSB 2.0 ports
provided as
standard

The current trend in semiconductors is towards lower voltages and higher speeds. This trend places similar demands not only
on the components of semiconductor power units, such as switching power supplies, batteries, and DC/DC converters, but also
on the electronic loads used for testing. Research and development in the field of fuel cells, which are expected to become aneco-friendly source of energy, demands electronic loads that allow a current to flow even at 0 V, as well as load systems withexpandable capacity for testing stacks of cells. The PLZ-4W Series of electronic loads has been developed to satisfy all thesedemands.
The PLZ-4W Series offers high-performance DC electronic loads capable of operating in six modes: constant current, constantresistance, constant voltage, constant power, constant current + constant voltage, and constant resistance + constant voltage.
In addition to offering high-speed response at a maximum slew rate of 16 A/μs*1 and a minimum setting resolution of 10 μA*2,
the system features a variety of functions including soft start, variable slew rate, a switching function, an ABC preset memory
function, 100 setup memories, and a sequence function. What’s more, timer functions combined with time/voltage measurement
functions allow you to measure battery discharge characteristics.
Also provided is a master/slave parallel operation capability *3 that makes it possible to expand the current and power capacities
according to the output of the device under test. The PLZ1004W can handle up to 9 kW and 1800 A through the use of
dedicated booster units (PLZ2004WB).
For communication, the system is provided with GPIB, RS232C, and USB 2.0 interfaces as standard. Each of these interfaces
supports IEEE 488.2 as well as the Standard Commands for Programmable Instruments (SCPI), developed for testing andmeasuring instruments.
*1: PLZ1004W*2: For the PLZ164/164WA L range*3: Up to five units of the same model (one master + four slaves)

P L Z -4W

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3

Merit of Ease of Use
Front and Rear Panels
Operation setting keys

These keys are used to set the basic value(current, conductance, voltage, or power),
operation mode, range, slew rate,
protection function, etc.

Speed-sensitive rotary knob

This rotary knob is used to set various values. You can switch between thecoarse adjustment mode and fine adjustment mode by pressing the rotaryknob. In fine adjustment (FINE) mode, the value changes at one-tenth of
the rate applied in coarse adjustment mode. Rotating the rotary knob while
holding down the SHIFT key changes the contrast of the display.

LOCAL/LOCK key

This key is used to switch to the local operation modein which you can perform operations from the panelsof the system, when the system is in remote control.
Pressing this key while holding down the SHIFT key
places the system in a lock state.

Memory/sequence
operation keys
These keys are used toperform setup memory
and ABC preset memory
setting operations,sequence editing andexecution, etc.

POWER switch
DC INPUT (front-panelload input terminal)This terminal allows easy connection ofthis system with the device to be tested.
The rear panel also has a load input
terminal, which is connected to the oneon the front panel in parallel.

EXT CONT

These variable resistors are used to adjust thefull scale and offset values set for this system,in response to the values input from anexternal control source (voltage or resistance).

LOAD
key

I MON OUT terminal
This output terminal is used for
current monitoring. Connect a
voltmeter or oscilloscope to thisterminal to conduct current
monitoring.

J1/J2 connectors

Switching operation keys
These keys are used to set the switchingfrequency, duty factor, time, level, and othervalues related to the switching operation.

These connectors are used for the input and output of thesignals intended to exert external control over this systemusing an external voltage, resistance, relay contact, etc.
J1 is for external control, and J2 is for parallel operation.

TRIG OUT terminal

This terminal is used to output
pulse signals during thesequence or switching operation.

DC INPUT(rear-panel load input terminal)This terminal is used to connect this system with the device
to be tested. It is connected to the load input terminal on
the front panel in parallel.

Remote sensing
terminal
Cooling fan

The use of a heat-sensitive,
variable-speed fan and the
pursuit of a more efficientcooling structure haveresulted in high reliability
and low noise.

GPIB
connector

PLZ664WA/PLZ1004W

RS-232C
connector

PLZ2004WB

USB connector
4

P L Z -4W

SERIESAC INPUT connector

Support of 0-V Input and High-Speed Response
Basic Performance and Operations
Six operation modes

Support of 0-V input

The system can operate in six modes - constant current,
constant resistance, constant voltage, constant power,
constant current + constant voltage, and constant resistance+ constant voltage.

PLZ164WA and PLZ664WA are 0-V input operating voltage
models. This feature is indispensable for testing single-cell
fuel cells. The c ontinuing trend toward lower power
consumption and semiconductor process miniaturization isdriving semiconductor devices to operate on increasingly
lower voltages. These models are suitable for evaluatingsuch power supplies.

Equivalent circuit and operation in each mode

●Constant current mode(CC)
Voltage［V］

I
V1Constant Voltage
power supplyV
PLZ-4W Series
Electronic Load

Current is constanteven when the voltagechanges0

Current I* This product detects a ‘no-input’ state when the input voltage is below about 0.3 V
and when the input current is below about 1% of the range rating. Therefore, if the
input voltage is raised gradually from 0 V, no current flows until the input voltage
exceeds 0.3 V. If a current exceeding 1% of the range rating flows, it is possible tohave a current flow at less than 0.3 V.
* PLZ164WA and PLZ664WA have bias supplies inside their chassis. In the case of
a power supply in which a diode is arranged in the direction from the minus output
to the plus output, such as a switching power supply, if the output of the power
supply of the device under test is turned off with this system’s load on, the current
flows from the bias supply to the diode, generating a reverse connection alarm.

CC setting value●Constant resistance mode(CR)Resistance (V/I) is constanteven when the voltage andcurrent vary

V1
Constant voltage
power supply

Voltage［V］

I

V
PLZ-4W Series
Electronic Load

V2

R=

V1

0

I1

Current I

V1= VI22
I1

I2

Variable slew rate
The slew rate determines the slope of change in the current
when the set current needs to change sharply as in atransient response test. This system lets you set the current
change rate per unit time as appropriate for the selectedcurrent range.

●Constant voltage mode(CV)Voltage is constant evenwhen the current varies

I

V1
Constant voltage
power supply

Voltage［V］

R1

V

PLZ-4W Series
Electronic Load0

• Shift in the current
waveform with thechange in the slew
rate

Current I●Constant power mode(CP)V1Constant voltage
power supply

Voltage［V］

I

V

PLZ-4W Series
Electronic Load

Power (current×voltage) is constanteven when the current and voltage vary

P = V 1 I1 = V 2

V1

I2High precision and high resolution

V2

0

I1

I2

Current I

Rated maximum
current value

R1

Voltage［V］●Constant current+constant voltage mode(CC+CV)
I

VM
Battery

CC operation
Current is constanteven when thevoltage varies

CV
Settingvalue

VPLZ-4W Series
Electronic Load0

CV operation
Voltage is constant evenwhen the current varies

Current I

Voltage［V］

I

VM
Battery

CR operation
Resistance (V/I) is constanteven when the voltage andcurrent varyCV operation
Voltage is constant evenwhen the current varies

CV
Settingvalue

VPLZ-4W Series
Electronic Load0

Current I

The built-in three-range configuration provides both wide
dynamic range and high precision. The voltmeter, ammeter
and wattmeter functions that display values using up to five
digits each and a minimum setting resolution of 10 μA (forthe PLZ164W/164WA L range) are implemented.
●PLZ164W operating range and setting resolution
Operating range

Setting resolution

Constant
current mode

H range
M range
L range

0 A to 33 A
0 A to 3.3 A
0 A to 330 mA

1 mA
0.1 mA
0.01 mA

Constant
resistancemode*

H range
M range
L range

22 S to 400 μS
2.2 S to 40 μS
0.22 S to 4 μS

400 μS
40 μS
4 μS

Constant
voltage mode

H range
L range

1.5 V to 150 V
1.5 V to 15 V

10 mV
1 mV

Constant
power mode

H range
M range
L range

16.5 W to 165 W
1.65 W to 16.5 W
0.165 W to 1.65 W

10 mW
1 mW
0.1 mW

CC setting value●Constant resistance+constant voltage mode(CR+CV)
R1* Adequate slew rate performance is guaranteed as long as the change in thecurrent remains within the 2 %-to-100 % range of the rating. The maximum risetime is limited to 10 μs. If the change in the current is small, the slew rate value
may not be stored for the reason stated above.

*Conductance [S] = Input current [A]/Input voltage [V] = 1/Resistance [Ω]P L Z -4W

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5

Support for Advanced Tests

Control Functions and Operation Support Functions
Load on/off operations

Remote sensing function

In addition to the regular operations, the following types ofload on/off operations are available. You can choose any ofthese operations as suitable for your operating environment.

The remote sensing function compensates for voltage drops
in load lines. It is used to set resistance and voltage values
correctly and to make accurate voltage and power measurements. Particularly, the function improves the transitional
characteristics in constant voltage, constant power andconstant resistance modes, leading to stable operation.
(The maximum voltage that can be compensated for is 2 V
for one way.)• Start in the load on state• Display of the elapsed load on time
• Auto load off after the elapse of the set time
• Load on/off control using relay and other external signals

Switching function

Sequence function
Any sequence patterns can be stored in the built-in memory.
The memory can hold up to 10 normal sequence programs
plus one fast sequence program. Each normal sequence
program can contain a maximum of 256 steps, with the fast
sequence program consisting of up to 1024 steps. You can
edit these programs on the large liquid crystal display (LCD)
monitor. * Use the sequence creation software tool Wavy (see page XX).

In constant current and constant resistance modes, switching operations can be performed at up to 20 kHz.
The switching setting parameters such as the switchinglevel, switching frequency, and duty factor can be changed
even while the load is on.
FREQTh

A pulse is output
from the TRIG OUT
terminal at this edge.

TL

SET [A] (100 %)LEVEL [A] (%)■ Normal sequence

0 [A] (0 %)Input current

A different execution time
can be assigned to eachstep individually. You canstop the execution of thesequence temporarily
using PAUSE and remove
the pause using an
external trigger signal.

7A

Step 1

Step 2

Step 3100-s ramp 150-s step 80-s ramp
(RAMP ON) (RAMP OFF) (RAMP ON)
7A
7A
0.5A

Time

■ Fast sequence
Execution (RUN)

TIME BASE(Execution interval)

Trigger output
Input current

Each step is executed athigh speed. The high time
resolution enables
high-speed simulations.
The fast sequence
program can contain up to1024 steps, which are
executed at even intervals.

10A

2 3 4 5 6 7 8 9 10

●Sequence setting parameters
Normal sequence
CC, CR, CV, CP

Operation mode
Maximum number
256
of steps
Step execution
1 ms to 999 h 59 mintime
1 ms (1 ms to 1 min)
100 ms (1 min to 1 h)
1 s (1 h to 10 h)Time resolution
10 s (10 h to 100h)
1 min (100 h to 999 h 59 min)Soft start function
The soft start function allows the rise time of the current tobe changed in constant current or constant resistance mode
after the output voltage of the device being tested has risen.
Since the rise time for the system can be changed according
to the output-voltage rise time for the device being tested,
you can conduct tests under highly realistic load conditions.
(The soft start time can be selected from the following options - 1, 2, 5, 10, 20, 50,
100, and 200 ms.)

5A

STEP 1[Setting parameters] ■Operation mode: CC and CR ■Duty factor: 5 % to 95 %, insteps of 0.1 % ■Frequency setting range: 1 Hz to 20 kHz ■Frequency setting
resolution: 0.1 Hz for 1 Hz to 10 Hz; 1 Hz for 10 Hz to 100 Hz; 10 Hz for 100 Hz to 1
kHz; 100 Hz for 1 kHz to 20 kHz ■Frequency setting accuracy: ±(0.5% of set)
* The minimum time interval for setting the duty factor is 10 μs.

Rise time for the direct
current power supply

Rise time for the electronic loadTime

Fast sequence
CC, CR1024
25 μs to 100 ms

25 μs (25 μs to 100 μs)
100 μs (100 μs to 100 ms)

When the soft start function is not used

Time
When the soft start function is used

Short-circuit function
When the system is operating in constant current or constantresistance mode, this function allows you to instantaneously
switch to the maximum current value (in constant currentmode) or to the minimum resistance value (in constant resistance mode) of the range. Also, since a contact signal is
output to the J1 connector, you can short-circuit the output ofthe device underJ1 connector++
on the rear
test by driving theDevicePLZ-4W
panel
under
Series––external relay or
testother element.
Large-current relay

Driving
circuit6

P L Z -4W

SERIESElapsed time display and auto load off timer

ABC preset memories

Combining four functions - elapsedt i m e d i s p l a y, u n d e r v o l t a g e
protection (UVP), load off voltage
display, and auto load off timer makes it possible to perform two■Example of the load off voltage display
types of measurements that are
useful in battery discharge tests - measurement of the time
elapsed from the start of discharge until the final voltage is
detected and measurement of the closed circuit voltage
after the specified time elapses from the start of discharge.

Three memories A, B, and C are provided for each range ineach mode, and the set values can be saved. The stored
set values can be called freely even while the load is on andsaved again.
In constant current + constant voltage and constantresistance + constant voltage modes, the constant current
and constant voltage memories and the constant resistanceand constant voltage memories can be called and saved,
respectively.

Set the auto load off timer(Tcutoff), and the voltage(V2) measured after the
specified time elapses will
be displayed.

Voltage

Useful forbattery
evaluations!!
V2

Setup memories
Set the voltage (V1) for
UVP detection, and thetime (Tcount) that elapses
until the voltage reaches
the set value will be
displayed.

V10

Tcutoff

TcountTime

Configuration settingThis function configures the settings related to the system
operation, communication environment, etc. These settings
are stored in the system memory, and called when the
power is turned on.
• Number of parallel operated load units and master/slave
settings• Load on/off operation at power-up• Key lock on/off operation at power-up• GPIB, RS232C, and USB selection• GPIB address• RS232C communication speed• Operation mode in which the external reference voltage
input is used
• Polarity of load on external control (low/high)Response speed settingThis system operates by monitoring the input current andvoltage values and exerting negative feedback control overthose values. You can set the response speed of thisnegative feedback control as shown below. This function isavailable in constant current mode (constant current +constant voltage mode) and constant resistance mode(constant resistance + constant voltage mode). If thesystem operation is unstable or problematic in some otherway because of the length of the load line or the size of theloop, you can stabilize the operation by setting the response
speed to a lower value.
1/1 : Normal response speed
1/2 : Twice slower than the normal speed
1/5 : Five times slower than the normal speed
1/10 : 10 times slower than the normal speed

Up to 100 of the set values listed below can be saved in the
setup memories.
• Operation mode (CC, CR, CV, and CP/+CV)• Current, resistance, voltage, and power values
recorded when saved• Range setting• Slew rate
• Switching frequency, duty factor, level, and time
• protection settings• ABC preset memory data

Diverse protection functions
The system features the following protection functions - overcurrent protection (OCP), over power protection (OPP), overvoltage protection (OVP), under voltage protection (UVP),
over heat protection (OHP), and reverse connection
detection (REV). Also available is the alarm input detection
function, which turns off the load in response to the input of
the external TTL signal.

Sample program
Free sample programs for the PLZ-4W Series are available
from our web site (www.kikusui.co.jp). These downloadable
sample programs include the utility software (MEMcopy)that lets you read and save setup memory data in a floppy
disk or other type of medium, sequence editing software(StepEdit), and VisualBasic applications for measurement
data collection and GUI remote control and their sourcecode (VB samples). Install these software programs andthe USB driver to a Windows-running personal computerequipped with a USB port (the system is compatible with
W i n d o w s 98 a n dlater). Then,c onnect the PC to
the PLZ-4W Series
electronic loadsystem using a USB
cable, and you canreadily get star ted
with measurements.

P L Z -4W

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7

Meeting Your System Upgrade Needs
Capacity Expansion Functions and External Control Functions* Large-capacity systems of 9 kW or more, rack-mounted systems, and other types of systems are supported.
For more information, please contact our sales representatives.

Booster (PLZ2004WB)

Parallel operation

To of fer a large c apacit y at low c ost, PL Z2004W B isavailable as a booster unit for the PLZ1004W system. Up tofour booster units canMaster (PLZ1004W)
be connected inparallel with one
Parallel cable
PC02-PLZ-4W
P L Z10 0 4W u n i t
Booster (PLZ2004WB)(for connecting the master
unit to the booster unit)
serving as the master
unit (max. 9 kW, 1800
A). To connect these
Parallel cable
Booster (PLZ2004WB)
PC01-PLZ-4W
units requires the useof o pt i o n a l c a b l e s o n e P C02- P L Z - 4W
Parallel cable
Booster (PLZ2004WB)
PC01-PLZ-4W
parallel cable and as
many P C01- PL Z-4W
parallel cables as the
Parallel cable
PC01-PLZ-4W
Booster (PLZ2004WB)
number of booster
units to be connected.

Without using boosters, you can connect up to five units ofthe same model in parallel, including the master unit (max. 5
k W , 10 0 0 A ) . I n t h e
Master (PLZ1004W)
parallel connection
configuration, one control
Parallel cablemaster operates with one
PC01-PLZ-4W
Slave (PLZ1004W)
or more slave units,
enabling you to control
Parallel cablet h e e n t i r e sy s t e m a n d
PC01-PLZ-4W
Slave (PLZ1004W)
view its data on themaster unit’s panel. To
connect the units requires
Parallel cable
PC01-PLZ-4W
Slave (PLZ1004W)
the use of as many
optional parallel cables(P C01- PL Z-4W ) as t he
Parallel cable
PC01-PLZ-4W
Slave (PLZ1004W)
number of units to beconnected.

●Booster PLZ2004WB■ Operating voltage: 1.5 to 150 V ■ Current: 400 A ■ Power: 2000 W■ Input power supply voltage range: 100 to 240 VAC (90 to 250 VAC),
single-phase connection ■ Power consumption: Max. 200 VA■ Dimensions: 429.5 (455) mm W × 128 (150) mm H × 550 (600) mm D
■ Weight: Approx. 23 kg* PLZ2004WB is a dedicated booster for PLZ1004W.
It cannot be used with any other model.

●Number of parallel connected units and capacities(maximum currents and maximum voltages)
Slave unit

1 unit2 units

3 units

4 units

PLZ164W/
PLZ164WA

66 A
330 W

99 A
495 W

132 A
660 W

165 A
825 W

PLZ334W

132 A
660 W

198 A
990 W

264 A
1320 W

330 A
1650 W

PLZ664WA

264 A
1320 W

396 A
1980 W

528 A
2640 W

660 A
3300 W

PLZ1004W

400 A
2000 W

600 A
3000 W

800 A
4000 W

1000 A
5000 W

External controls
External controls are provided by means of the inputs fromthe GPIB, RS232C, USB, and analog interfaces.
The GPIB, RS232C, and USB interfaces comply with thestandards listed below. Using the external analog inputs,
you can perform such operations as external voltage - orresistance-based control, load on/off, current range switching and input current monitor output.
External
analogGPIB

RS232CUSB

8

P L Z -4W

SERIES●Supported interface standards• IEEE Std 488.2-1992• IEEE Std 488.1-1987• TIA/EIA-232F• SCPI 1999.0• USB 2.0 (Full Speed)• USBTMC 1.0●Measuring instrument driver
You can download themeasuring instrument
driver (freeware) fromour Web site. Please
visit the site and makefull use of it.
(https://global.kikusui.co.jp/)● Voltage- or resistance-based external analog controls
Control method
Voltage

Operation mode
CC, CP, CV
CR

Resistance(proportional)

CC, CP, CV
CR

Resistance(inversely
proportional)

CC, CP, CV
CR

Explanation
A change of 0 to 10 V causes achange of 0% to 100% of the rated
range value.
A change of 0 to 10 V causes achange ranging from the maximum tominimum values of the range.
A change of 0 Ω to 10 kΩ causes achange of 0% to 100% of the rated
range value.
A change of 0 Ω to 10 kΩ causes achange ranging from the maximum tominimum values of the range.
A change of 10 kΩ to 0 Ω causes achange of 0% to 100% of the rated
range value.
A change of 10 kΩ to 0 Ω causes achange ranging from the maximum tominimum values of the range● Other external analog controls■Load on/off control and monitoring ■Range control and monitoring in eachcurrent range switching mode ■Pause clear during trigger input sequences■Forcible alarm generation upon alarm input ■Input current monitoring by
the current monitor ■Short signal output from the relay contact* To connect to the external analog input interface, use a commercially available MIL-standard 20-pin connector or the accessory kit (OP01-PLZ-4W).

Specifications

Unless specified otherwise, the specifications are for the following settings and conditions.
• The warm-up time is 30 minutes (with current flowing).
• After warm-up is complete, the PLZ-4W must be calibrated correctly according to the procedures given in the operation manual
in a 23 °C±5 °C environment.
• ** % of set denotes ** % of the input voltage, input current, or input power setting.
• ** % of f.s denotes ** % of the rated input voltage, rated input current, or rated input power.
• **% of rdg represents denotes ** % of the input voltage, input current, or input power reading.

RatingModel
Operating voltage (DC) *1
Current
Power

PLZ164W
33 A
165 W

PLZ334W
1.5 V to 150 V *2
66 A
330 W

PLZ1004W

PLZ164WA
PLZ664WA
0 V to 150 V *3
33 A
132 A
165 W
660 W

200 A
1000 WCC modeOperatingrange
Settingrange
Resolution

Accuracy ofsetting
Input voltage
variation *4
Ripple

Model
H
M
L
Range
H
M
L
Range
H
M
L
Range
H, M
L
Parallel operation
Range
H
M
L
rms *5Range

p-p *6

PLZ164W
0 A to 33 A
0 A to 3.3 A
0 A to 330 mA
0 A to 34.65 A
0 A to 3.465 A
0 A to 346.5 mA
1 mA
0.1 mA
0.01 mA

2 mA
2 mA
0.1 mA

PLZ334W
PLZ1004W
PLZ164WA
0 A to 66 A
0 A to 200 A
0 A to 33 A
0 A to 6.6 A
0 A to 20 A
0 A to 3.3 A
0 A to 660 mA
0 A to 2 A
0 A to 330 mA
0 A to 69.3 A
0 A to 210 A
0 A to 34.65 A
0 A to 6.93 A
0 A to 21 A
0 A to 3.465 A
0 A to 693 mA
0 A to 2.1 A
0 A to 346.5 mA
2 mA
10 mA
1 mA
0.2 mA1 mA
0.1 mA
0.02 mA
0.1 mA
0.01 mA±(0.2 % of set + 0.1 % of f.s *1) + Vin *2/ 500 kΩ
±(0.2 % of set + 0.1 % of f.s)±(1.2 % of set + 1.1 % of f.s *3)
4 mA
10 mA
2 mA
4 mA
10 mA
2 mA
0.2 mA
0.6 mA
0.1 mA

PLZ664WA
0 A to 132 A
0 A to 13.2 A
0 A to 1.32 A
0 A to 138.6 A
0 A to 13.86 A
0 A to 1.386 A
10 mA
1 mA
0.1 mA

8 mA
8 mA
0.4 mA

3 mA

5 mA

20 mA *7

7.5 mA

30 mA *7

30 mA

50 mA

100 mA *7

50 mA

200 mA *7

CR modeOperatingrange*1

Range

Model
H
M
L

Setting
range

Range

H
M
L

Resolution

Range

Accuracy ofsetting *2

Range

H
M
L
H, M
L

PLZ164W
PLZ334W
PLZ1004W
PLZ164WA
PLZ664WA
22 S to 400 μS
44 S to 800 μS
133.332 S to 2.4 mS
22 S to 400 μS
88 S to 1.6 mS(45.455 mΩ to 2.5 kΩ) (22.727 mΩ to 1.25 kΩ) (7.5 mΩ to 416.666 Ω) (45.455 mΩ to 2.5 kΩ) (11.363 mΩ to 625 Ω)
2.2 S to 40 μS
4.4 S to 80 μS
13.3332 S to 2420 μS
2.2 S to 40 μS
8.8 S to 160 μS(454.55 mΩ to 25 kΩ) (227.27 mΩ to 12.5 kΩ) (75 mΩ to 4.1666 kΩ) (454.55 mΩ to 25 kΩ) (113.63 mΩ to 6.25 kΩ)
0.22 S to 4 μS
0.44 S to 8 μS
1.33332 S to 24 μS
0.22 S to 4 μS
0.88 S to 16 μS(4.545 5 Ω to 250 kΩ) (2.272 7 Ω to 125 kΩ) (750 mΩ to 41.666 kΩ) (4.545 5 Ω to 250 kΩ) (1.136 3 mΩ to 62.5 kΩ)
23.1 S to 0 S
46.1 S to 0 S
139.9968 S to 0 S
23.1 S to 0 S
92.4 S to 0 S(43.290 mΩ to OPEN) (21.692 mΩ to OPEN) (7.1430 mΩ to OPEN) (43.290 mΩ to OPEN) (10.822 mΩ to OPEN)
2.31 S to 0 S
4.61 S to 0 S
13.99968 S to 0 S
2.31 S to 0 S
9.24 S to 0 S(432.9 mΩ to OPEN) (216.92 mΩ to OPEN) (71.430 mΩ to OPEN) (432.9 mΩ to OPEN) (108.22 mΩ to OPEN)
0.231 S to 0 S
0.461 S to 0 S
1.399968 S to 0 S
0.231 S to 0 S
0.924 S to 0 S(4.329 Ω to OPEN) (2.1692 Ω to OPEN) (714.30 mΩ to OPEN) (4.329 Ω to OPEN) (1.0822 Ω to OPEN)
400 μS
800 μS
2.424 mS
400 μS
1.6 mS
40 μS
80 μS
242.4 μS
40 μS
160 μS
4 μS
8 μS
24.24 μS
4 μS
16 μS±(0.5 % of set *3 + 0.5 % of f.s *4) + Vin *5/ 500 kΩ
±(0.5 % of set *3 + 0.5 % of f.s)

CV modeOperating
range

Range

Setting
range

Range

Resolution

Range

Accuracy ofRange
setting *1
Input current variation *2

Model
H
L
H
L
H
L

PLZ164W

H,L

PLZ334W
1.5 V to 150 V
1.5 V to 15 V

PLZ1004W

PLZ164WA
PLZ664WA
0 V to 150 V
0 V to 15 V

0 V to 157.5 V
0 V to 15.75 V
10 mV
1 mV
±(0.1 % of set + 0.1 % of f.s)

Range

Setting
range

Range

Resolution

Range

Accuracy ofsetting *1

Range[CC mode]*1 Full scale of H range*2 Vin: Input terminal voltage ofElectronic Load
*3 M range applies to the full scale of H
range.
*4 When the input voltage is varied from
1.5 V to 150 V at a current of rated
power/150 V.
*5 Measurement frequency bandwidth:
10 Hz to 1 MHz*6 Measurement frequency bandwidth:
10 Hz to 20 MHz*7 At measurement current of 100 A[CR mode]*1 Conductance [S] = Input current [A]/input voltage [V] = 1/resistance [Ω]*2 Converted value at the input current.
At the sensing point.
*3 set = Vin/Rset*4 Full scale of H range*5 Vin: Input terminal voltage ofElectronic Load

[CV mode]*1 At the sensing point during remotesensing under the operating range ofthe input voltage. It is also applied forthecondition of the parrallel
operation.
*2 With respect to a change in thecurrent of 10 % to 100 % of the rating
at an input voltage of 1.5 V (during
remotesensing).

12 mV

CP modeOperatingrange[Rating]*1 Minimum voltage at which the current
starts flowing to the PLZ-4W isapproximately 0.3 V. For descriptionof theminimum voltage, see “3.3Operating area of the PLZ-4W”.
*2 The minimum operating voltage(including the voltage drop due to thewire inductance component) inswitchingmode increases by 0.15 V
per 1 A/μs at slew rate settings
greater than 5 A/μs.
*3 The minimum operating voltage(including the voltage drop due to thewire inductance component) inswitchingmode increases by 0.3 V
per 1 A/μs at slew rate settings
greater than 5 A/μs.

Model
PLZ164W
H
16.5 W to 165 W
M
1.65 W to 16.5 W
L
0.165 W to 1.65 W
H
0 W to 173.25 W
M
0 W to 17.325 W
L
0 W to 1.7325 W
H
10 mW
M
1 mW
L
0.1 mW

PLZ334W
33 W to 330 W
3.3 W to 33 W
0.33 W to 3.3 W
0 W to 346.5 W
0 W to 34.65 W
0 W to 3.465 W
10 mW
1 mW
0.1 mW

PLZ1004W
100 W to 1000 W
10 W to 100 W
1 W to 10 W
0 W to 1050 W
0 W to 105 W
0 W to 10.5 W
100 mW
10 mW
1 mW

PLZ164WA
16.5 W to 165 W
1.65 W to 16.5 W
0.165 W to 1.65 W
0 W to 173.25 W
0 W to 17.325 W
0 W to 1.732 5 W
10 mW
1 mW
0.1 mW

PLZ664WA
66 W to 660 W
6.6 W to 66 W
0.66 W to 6.6 W
0 W to 693 W
0 W to 69.3 W
0 W to 6.93 W
20 mW
2 mW
0.2 mW[CP mode]*1 It is not applied for the condition of
the parrallel operation.
*2 M range applies to the full scale of H
range.

±(0.6 % of set + 1.4 % of f.s *2)

P L Z -4W

SERIES

9

[Meters]*1 Displays the product of the voltmeterreading and ammeter reading.
*2 In a mode other the CP mode
*3 In CP mode

Meters0.00 W to165.00 W
0.000 W to49.500 W
0.0000 W to
1.6500 W

PLZ1004W
PLZ164WA
0.00 V to 150.00 V
0.000 V to 15.000 V±(0.1 % of rdg + 0.1 % of f.s)
0.000 A to
0.00 A to
0.000 A to
66.000 A
200.00 A
33.000 A
0.00 A to
0.0000 A to
0.00 A to
660.00 mA
2.0000 A
330.00 mA±(0.2 % of rdg + 0.3 % of f.s)
0.00 W to
0.0 W to0.00 W to
330.00 W
1000.0 W
165.00 W
0.000 W to
0.00 W to
0.000 W to
99.000 W
300.00 W
49.500 W
0.0000 W to
0.000 W to
0.0000 W to
3.3000 W
10.000 W
1.6500 W

0.00 W to660.00 W
0.000 W to
198.00 W
0.0000 W to
6.6000 W

PLZ164W

PLZ334W

PLZ664WA

PLZ164W
2.5 mA/μs
to 2.5 A/μs
250 μA/μs
to 250 mA/μs
25 μA/μs
to 25 mA/μs

PLZ334W
5 mA/μs
to 5 A/μs
500 μA/μs
to 500 mA/μs
50 μA/μs
to 50 mA/μs

PLZ1004W
16 mA/μs
to 16 A/μs
1.6 mA/μs
to 1.6 A/μs
160 μA/μs
to 160 mA/μs
See below.
±(10 % of set + 5 μs)

PLZ164WA
2.5 mA/μs
to 2.5 A/μs
250 μA/μs
to 250 mA/μs
25 μA/μs
to 25 mA/μs

PLZ664WA
10 mA/μs
to 10 A/μs
1 mA/μs
to 1 A/μs
100 μA/μs
to 100 mA/μs

25 μA/μs
to 250 μA/μs
100 nA
50 μA/μs
to 500 μA/μs
200 nA
100 μA/μs
to 1 mA/μs
400 nA
160 μA/μs
to 1.6 mA/μs
600 nA

250 μA/μs
to 2.5 mA/μs
1 μA
500 μA/μs
to 5 mA/μs
2 μA
1 mA/μs
to 10 mA/μs
4 μA
1.6 mA/μs
to 16 mA/μs
6 μA

2.5 mA/μs
to 25 mA/μs
10 μA
5 mA/μs
to 50 mA/μs
20 μA
10 mA/μs
to 100 mA/μs
40 μA
16 mA/μs
to 160 mA/μs
60 μA

25 mA/μs
to 250 mA/μs
100 μA
50 mA/μs
to 500 mA/μs
200 μA
100 mA/μs
to 1 A/μs
400 μA
160 mA/μs
to 1.6 A/μs
600 μA

250 mA/μs
to 2.5 A/μs
1 mA
500 mA/μs
to 5 A/μs
2 mA
1 A/μsto 10 A/μs
4 mA
1.6 A/μs
to 16 A/μs
6 mA

Model

PLZ164W

PLZ334W

PLZ1004W
PLZ164WA
CC and CR
1, 2, 5, 10, 20, 50, 100, or 200 ms±(30 % of set +100 μs)

PLZ664WA

Model
Voltage that can be compensated

PLZ164W

PLZ334W

Voltmeter

Range

Ammeter

Accuracy
Range

Model
H
L

PLZ164W

H, M

0.000 A to
33.000 A
0.00 A to
330.00 mA

L

Wattmeter *1

Accuracy
Range

H, M
L *2
L *3

[Switching mode]*1 The minimum time width is 10 μs.
Between 5 kHz and 20 kHz, themaximum duty cycle is limited by themini-mum time width.

[Slew rate]*1 In CC mode. The maximum slew rateof each range is 1/10th the value in
CR mode.
*2 Time to reach from 10 % to 90 %when the current is varied from 2 %to 100 % of the rated current.

PLZ334W

PLZ664WA

0.00 A to
132.00 A
0.000 A to
1.3200 A

Switching mode
Model
Operation mode
Duty cycle setting
Selectable frequency range
Frequency
1 Hz to 10 Hz
resolution
10 Hz to 100 Hz
100 Hz to 1 kHz
1 kHz to 20 kHz
Frequency accuracy of setting

PLZ1004W
PLZ164WA
CC and CR
5 % to 95 % *1, 0.1 % step
1 Hz to 20 kHz
0.1 Hz
1 Hz
10 Hz
100 Hz±(0.5 % of set)Slew rate
Setting range *1

Range

Model
H
M
L

Resolution
Accuracy of setting *2

Slew rate resolution
PLZ164W
PLZ164WA

Setting

PLZ334W

Resolution
Setting

PLZ664WA

Resolution
Setting

PLZ1004W

Resolution
Setting
Resolution

Soft start
Operation mode
Selectable time range
Time accuracy

Remote sensing
PLZ1004W
2 V for a single line

PLZ164WA

PLZ664WA

Protection function
Model

PLZ334W
PLZ1004W
PLZ164WA
PLZ664WA
Turns off the load at 110 % of the rated voltage
0.03 A to 36.3 A 0.06 A to 72.6 A
0.2 A to 220 A
0.03 A to 36.3 A 0.13 A to 145.2 A
Or 110 % of the maximum current of each range
Overpower protection (OPP)
0.1 W to 181.5 W 0.3 W to 363 W
1 W to 1 100 W 0.1 W to 181.5 W 0.6 W to 726 W
Or 110 % of the maximum power of each range
Load off or limit selectable
Overheat protection (OHP)
Turns off the load when the heat sink temperature reaches 95 °C
Undervoltage protection (UVP)
Turns off the load when detected.
Can be set in the range of 0 V to 150 V or Off.
Reverse connection protection (REV)
By diode and fuse. Turns off the load when an alarm occurs.
Overvoltage protection (OVP)
Overcurrent protection (OCP)

10 P L Z -4W

SERIES

PLZ164W

Sequence function
Normalsequence

Fast
sequence

Model
Operation mode
Maximum number of steps
Step execution time
Time resolution

PLZ164W

Operation mode
Maximum number of steps
Step execution time
Time resolution

PLZ334W

PLZ1004W
PLZ164WA
CC, CR, CV, or CP
256
1 ms – 999 h 59 min
1 ms (1 ms – 1 min)/100 ms (1 min – 1 h)/1 s (1 h – 10 h)/
10 s (10 h – 100 h)/1 min (100 h – 999 h 59 min)CC or CR1024
25 μs – 100 ms
25 μs (25 μs – 100 μs)/100 μs (100 μs – 100 ms)

PLZ664WA

Others, Common specifications
Model
Elapsed time display

PLZ164W

PLZ334W

PLZ1004W

PLZ164WA

PLZ664WA

Measures the time from load on to load off. On/Off selectable.
Measures from 1 s up to 999 h 59 min 59 s

Auto load off timer

Automatically turns off the load after a specified time elapses.
Can be set in the range of 1 s to 999 h 59 min 59 s or off

Front panel BNC TRIG OUT
connector

Communication
function

Trigger output: Approx. 4.5 V, pulse width: Approx. 2 μs, output impedance: Approx. 500 Ω
Outputs a pulse during sequence operation and switching operation.

I MON OUT

Current monitor output
1 V f.s (H or L range) and 0.1 V f.s (M range)

GPIBIEEE std. 488.1-1978
SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, C0, E1
Supports the SCPI and IEEE std. 488.2-1992 command set
Sets panel functions except the power switch and reads measured values

RS232CD-SUB 9-pin connector (conforms to EIA-232-D)
Sets panel functions except the power switch and reads measured values
Supports the SCPI and IEEE std. 488.2-1992 command set
Baud rate: 2400, 4800, 9600, 19200 bps
Data length: 8-bit, Stop bit: 1, 2-bit, Parity bit: None, Flow control: Xon/XoffUSB

Conforms to USB 2.0 Specifications and USBTMC-USB488 Device Class Specifications
Sets panel functions except the power switch and reads measured values
Communication speed 12 Mbps (Full speed)

General Specifications
Model

PLZ334W
PLZ1004W
PLZ164WA
PLZ664WA
100 VAC – 240 VAC
100 VAC – 120 VAC/200 VAC – 240 VAC(90 VAC – 250 VAC)
(90 VAC – 132 VAC/180 VAC – 250 VAC)
Single phase
Single phase, continuous
Input frequency range
47 Hz – 63 Hz
Power consumption
80 VAmax
90 VAmax
160 VAmax
300 VAmax
1500 VAmax *1
Inrush current
45 A
80 A
Operating temperature range
0°C to 40°C (32°F to 104°F)
Operating humidity range
20 % - 85 % RH (without condensation)
Storage temperature range-25°C to 70°C (-13 °F to 158 °F)
Storage humidity range
90 % RH or less (without condensation)
Isolation voltage±500 V
Insulation
Primary - input terminal
500 VDC, 30 MΩ or more (ambient humidity of 70 % RH or less)resistancePrimary - chassis
500 VDC, 30 MΩ or more (ambient humidity of 70 % RH or less)WithstandPrimary - input terminal
No abnormalities at 1500 VAC for 1 minute.
voltagePrimary - chassis
No abnormalities at 1500 VAC for 1 minute.
Dimensions (mm)See outline drawing
WeightApprox. 7 kg
Approx. 8 kg
Approx. 15 kg
Approx. 7.5 kg
Approx. 16 kg(15.43 lb)(17.64 lb)(33.07 lb)(16.53 lb)(35.27 lb)
Battery backup
Backs up setup information
Accessories
Power cord × 1 pc. (with plug, Length: approx. 2.4 m),
Load input terminal cover × 1 piece (2 lock plates provided),Set of screws for the load input terminal × 2 sets (bolts, nuts, and spring washers),
Setup guide × 1 piece(Japanese, English),
Quick Reference(Japanese:1 piece, Englis:1 piece), CD-ROM × 1 piece *2
Safety *3Complies with the requirements of the following directive and standard.
Low Voltage Directive 2014/35/EU *4
EN 61010-1 (Class I *5, Pollution degree 2 *6)
Electromagnetic compatibility
Complies with the requirements of the following directive and standards.
(EMC) *3, *4
EMC Directive 2014/30/EU
EN 61326-1 (Class A *7)
EN 55011 (Class A *7, Group 1 *8)
EN 61000-3-2 *9
EN 61000-3-3 *9

Input voltage range

PLZ164W[General Specifications]*1. 900 VA when input voltage is 100
VAC.
*2. Contains Application & Samples,
User’s manual, the Communication
Interface Manual and KI-VISA.
*3. Does not apply to specially orderedor modified PLZ-4Ws.
*4. Limited to products that have the CE
mark on their panels.
Not be in compliance with EMC limits
unless the ferritecore is attached on
the cable for connection of J1
connector.
*5. This is a Class I equipment. Be sureto ground this product’s protective
conductor terminal. The safety of thisproductis only guaranteed when the
product is properly grounded.
*6. Pollution is addition of foreign matter(solid, liquid or gaseous) that may
produce a reduction of dielectricstrength orsurface resistivity.
Pollution Degree 2 assumes that only
non-conductive pollution will occur
except for an occasionaltemporaryconductivity caused bycondensation.
*7. This is a Class A equipment. This
product is intended for use in anindustrial environment. This productmay causeinterference if used inresidential areas. Such use must be
avoided unless the user takes special
measures to reduceelectromagnetic
emissions to prevent interference tothe reception of radio and television
broadcasts.
*8. This is a Group 1 equipment.
This product does not generate and/or use intentionally radio-frequency
energy, in theform of electromagnetic
radiation, inductive and/or capacitive
coupling, for the treatment of material
or inspection/analysis purpose.
*9. Excluding the PLZ664WA.

P L Z -4W

S E R I E S 11

External Dimensions and Rack Mounting
Unit: mm (inch)■ Type I (PLZ164W/PLZ164WA/PLZ334W)

MAX470(185.04)
400(157.48)

MAX
30(11.81)

KRA3

465
(18.3
1)
482
(18.9
8)

260

4)

(10.2

149 (5.87)
24.5 (0.96) 100 (3.94)

for JIS-compliant rack

KRA3

MAX
20
(7.87) 124(48.82)
MAX155(61.02)

214.5(84.45)

132.5 (5.22)
37.75 (1.49) 57 (2.24)

for EIA-compliant rack

KRA150

KRA150

460
(18.1
1)
480
(18.9
0)

260

4)

(10.2

DC input termials : M6 (front), M8 (rear)
Power input: AC inlet■ Type II (PLZ664WA/PLZ1004W/PLZ2004WB)

MAX470(185.04)
400(157.48)

KRB150-TOS

KRB150-TOS

460
(18.1
1)
479
(18.8
6)

100
(3.94)
149 (5.87)

57(2.24)132 (5.20)

MAX
30(11.81)

465
(18.3
1)
479
(18.8
6)

37.5 (1.48)

MAX455(179.13)
429.5(169.09)

for JIS-compliant rack

KRB3-TOS

128(50.39)
MAX150(59.06)

MAX
10(3.94)

KRB3-TOS

24.5 (0.96)

for EIA-compliant rack
* The depth of PLZ2004WB is
550 mm (Max. 600).
Operating area, display area
and input termials etc. are notprovided in front panel.

DC input termials : M6 (front), M8 (rear)
Power input: AC inlet* DC input termials of PLZ2004WB is M12 (rear) only■Distributor:

1-1-3, Higashiyamata, Tsuzuki-ku, Yokohama, Kanagawa, 224-0023, Japan
Phone:(+81)45-593-0200, Facsimile:(+81)45-593-7591, https://global.kikusui.co.jp/■ All products contained in this catalogue are equipment and devices that are premised on use under the supervisionof qualified personnel, and are not designed or produced for home-use or use by general consumers. ■ Specifications,design and so forth are subject to change without prior notice to improve the quality. ■ Product names and prices are
subject to change and production may be discontinued when necessary. ■ Product names, company names and brandnames contained in this catalogue represent the respective registered trade name or trade mark. ■ Colors, texturesand so forth of photographs shown in this catalogue may differ from actual products due to a limited fidelity in printing.
■ Although every effort has been made to provide the information as accurate as possible for this catalogue, certain
details have unavoidably been omitted due to limitations in space. ■ If you find any misprints or errors in this catalogue,
it would be appreciated if you would inform us. ■ Please contact our distributors to confirm specifications, price,accessories or anything that may be unclear when placing an order or concluding a purchasing agreement.

Printed in Japan

Issue:Nov.2022 202211PDFEC81