Electronic Load
PLZ-4WL Series

Full-Load Current of 100 A at 0.3 V!

High Speed-Large Current DC Electronic Load (50 A/μs)
Applications

While the PLZ-4WL series succeeds to the superior operability of ourconventional model of the PLZ-4W series, the PLZ-4WL series realizes
the high speed rise and fall time (slew rate of 50 A/μs.) in the rangeof low voltage with large current. The PLZ-4WL offers six operation
modes, and equips with various features such as sequence operation,
switching operation, soft-start function, and time and voltage measurement. The PLZ-4WL applies not only for the conventional load test of
the CPU power supply, but also it can be applied to even faster current
response test. In addition, the PLZ-4WL is a space-saving design(about 50 % less volume of the conventional model) that can save thefacility space of the testing site, and it can be applied for the single cell
testing of the large scale rechargeable battery.

■ Test for the Low Voltage Power Supply of the CPU■ Discharge test for the large current rechargeable battery■ IV characteristic test of the solar battery■ Impedance test for the various type of rechargeable 		batteries, power supplies■ Test for the relays, switches■ Absorbing the surge of brushless motor■ Test for the prearcing time-current characteristic

Electronic Load

PLZ-4WL series■ Lineup

Model

Operation voltage

PLZ164WL

Current

Power

50 A

165 W

100 A

330 W

0.3 V to 30 V

PLZ334WL■ Interface USB, GPIB, and RS232C are equipped as standard.

Feature/Function
Realizing the low voltage operation
Possible to operate as low as 50 mV by the input
voltage. Even below the input voltage of 0.3 V, thisproduct can be used by reducing the current.
▼Conceptual drawing of the operating range

1000.0■ Specification range

Conventional model（PLZ334W）

30V

PLZ334WL

10.0

Voltage
1.0
0.3V
50mV

0.1

0

20

40

60

80

100

Convenient feature for thedischarge testing
The Auto load-off timer and the cut-off features canbe applied to the discharge capacitance measurement of the rechargeable battery.
Sets the Auto load-off
timer (T cut off), thenit displays the voltage(V2) after the elapsed
setting time.

V2

Sets the UVP detectedvoltage (V1), then it displays the elapsed time
(Tcount) of reaching forthe setting voltage.

V1
T cut off

T count

Realize the slew rate of 50 A/μs at 2.3 V of the load
input terminal voltage.
100 A
40 A

5mA

M Range

0.5mA

L Range

0. 05mA▲Current rise time conversion:
Approx. 2 μs (PLZ334WL)

120

Current0

H Range

100A
0.01

Voltage

Each operation mode of the CC, CR, and CP has 3
ranges (H, M, L). The "L "range employs the scaleof 1/100 which covers the range from the small tothe large scale of the current.

Fast Slew rate

Current setting resolution of the PLZ334WL■ Operable range

100.0

Accurate low-rate discharge by the
Low-range (1/100)

Time

Operation mode
Applied to the 6 operating modes (Constant current,
Constant resistance, Constant voltage, Constant
power, Constant current + Constant voltage,
Constant resistance + Constant voltage)

Sequence function▲Current fall time conversion :Approx. 2 μs(PLZ334WL)

The sequence mode can be set in 2 operation
modes (Normal and fast mode). The fast modecan be set for the minimum step time of 25 μs, andit can be synchronized with the external device byusing the trigger input/output feature.

Other features

External analog control*Master-Slave parallel operation can not be configured on
this model.

Not only the external control for the CC, CR, CP,
and CV, but also it is capable to superimpose thecurrent by the external input current on the present
value of the CC setting. Moreover, it also can turnthe LOAD ON/OFF.

OptionFor the switching operation, set-up memories (100),
CC soft-start, slew rate setting (CC), response setting (2 levels for each CV and CR), Current monitor
output, remote sensing, and more.

■ Low inductance cable[TL01-PLZ(50cm)][TL02-PLZ(1m)][TL03-PLZ(2m)]Protection features
To ensure the safety, it equips the various protection features and activation of the alarm function.
The alarm function can be output to the externalsource as an alarm output. The fuse is used to
cut-off the output for the protection feature of thereverse connection.

■ Rack mount accessories[KRA150(millimeter size)][KRA3(inch size)]■ Analog remote control
connector kit[OP01-PLZ-4WL]■ Aplication Software[Wavy for PLZ-4W]▲TL03-PLZ

The current waveform canbe easily simulated by the
PC. The measuring featureenables data logging.

Specifications
Model

PLZ164WL

PLZ334WL

Model

PLZ164WL
Operation modes

0.3 V to 30 V
Operating voltage (DC)
Ratings

Current

50 A

100 A

Power

165 W

330 W

Minimum start voltage *1

50 mV (typ)H

0 A to 50 A

0 A to 100 AM

0 A to 5 A

0 A to 10 AL

0 A to 500 mA

0 A to 1 A

H

0 A to 52.5 A

0 A to 105 A

M

0 A to 5.25 A

0 A to 10.5 A

L

0 A to 525 mA

0 A to 1.05 A

H

2 mA

5 mA

M

0.2 mA

0.5 mA

L

0.02 mA

0.05 mA

Operating range

Setting range
Constant
current (CC)mode

Resolution

Setting range

Setting range
Resolution

Setting range

Resolution

Turn on the load with a high (or low) CMOS level signal

Load on status output

On when the load is on (open collector output from a photocoupler)

4 mA

8 mA

p-p *6

40 mA

80 mA

Trigger input

330 S to 6 mS
(3.03 mΩ to 166.7 Ω)

Clear the sequence operation pause with a high CMOS levelsignal whose duration is 10 μs or longer

H

165 S to 3 mS
(6.06 mΩ to 333 Ω)

Alarm input

Activate the alarm with a low CMOS level signal

M16.5 S to 300 μS(60.6 mΩ to 3.33 kΩ)

33.3 S to 600 μS(30.3 mΩ to 1.667 kΩ)

L

1.65 S to 30 μS(606 mΩ to 33.3 kΩ)

3.3 S to 60 μS(303 mΩ to 16.67 kΩ)

H

173.25 S to 0 S(5.77 mΩ to OPEN)

346.5 S to 0 S(2.886 mΩ to OPEN)

M

17.325 S to 0 S(57.7 mΩ to OPEN)

34.65 S to 0 S(28.86 mΩ to OPEN)

L

1.7325 S to 0 S(577 mΩ to OPEN)

3.465 S to 0 S(288.6 mΩ to OPEN)

H

3 mS

6 mS

M

300 μS

600 μS

30 μS

60 μS

±(0.5 % of set *8 + 0.5 % of f.s.*2) + Vin/150kΩ
H

0.3 V to 30 V

L

0.3 V to 4 V

H

0 V to 31.5 V

L

0 V to 4.2 V

H

2 mV

L

200 μV

Display

Short signal output

Relay contact output (30 Vdc/1 A)

External voltage control(CC, CR, and CP mode)

Voltages in the range of 0 V to 10 V correspond to 0 % to 100 % of the
rated current (CC mode) or rated power (CP mode). Voltages in the rangeof 0 V to 10 V correspond to the range of resistance values from the
maximum resistance value to the minimum resistance value (CR mode).

External voltage control(CV mode)

Voltages in the range of 0 V to 10 V correspond to the range of voltages
from 0 % of the rated voltage to 100 % of the rated voltage.

External voltage control(superimposing in CC
mode)

Superimpose the current on the CC mode panel/remote setting by applying
an external voltage of -10 V to 10 V (CC mode). 0 V corresponds to 0 % of
the current setting and 10 V corresponds to 100 % of the current setting.

Current monitor output

10 V for f.s (H or L range), 1 V for f.s (M range)

Front panel BNC connector
TRIG OUT

Trigger output: Approx. 4.5 V, pulse width: Approx. 2 μs, output
impedance: Approx. 500 Ω
Outputs a (low level) pulse during sequence operation andswitching operation.

IMON OUT

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

Input voltage range

100 Vac to 240 Vac (90 Vac to 250 Vac), single phase, continuous

33 W to 330 W

Input frequency range

47 Hz to 63 Hz

M

1.65 W to 16.5 W

3.3 W to 33 W

Power consumption

95 VA maxL

0.165 W to 1.65 W

0.33 W to 3.3 W

Inrush current *13

65 Amax

H

0 W to 173.25 W

0 W to 346.5 W

Operating temperature range

0 °C to 40 °C (32 °F to 104 °F)

M

0 W to 17.325 W

0 W to 34.65 W

Operating humidity range

20 %rh to 85%rh (no condensation)

L

0 W to 1.7325 W

0 W to 3.465 W

Storage temperature range-20 °C to 70 °C (-4 °F to 158 °F)

H

10 mW

20 mW

Storage humidity range

90 %rh or less (no condensation)

M

1 mW

2 mW

Isolation voltage±500 VL

0.1 mW

0.2 mW

H

0.000 V to 30.000 V

Primary - input terminal 500 Vdc, 30 MΩ or more (ambient humidity of 70 %rh or less)Insulation
Primary - chassis
500 Vdc, 30 MΩ or more (ambient humidity of 70 %rh or less)resistance
Input terminal- chassis 500 Vdc, 30 MΩ or more (ambient humidity of 70 %rh or less)L

0.0000 V to 4.0000 V

12 mV±(2.5 % of f.s.*2)

GeneralPrimary - input terminal No abnormalities at 1500 Vac for 1 minuteSpecifications WithstandvoltagePrimary - chassis
No abnormalities at 1500 Vac for 1 minute±(0.1 % of reading + 0.1 % of f.s)H

0.000 A to 50.000 A

0.00 A to 100.00 A

M

0.000 A to 5.000 A

0.000 A to 10.000 A

0.00 mA to 500.00 mA

0.0000 A to 1.0000 A

L

Accessories

Power cord(1 pc.(with plug, length: 2.4 m)), Load input terminal
cover(1 pc.), Set of screws for the load input terminal cover(2sets), Set of screws for the load input terminal(2 sets), Chassis
connection wire(1 pc.), CD-R(1 pc.), Setup Guide(1 pc.(Japanese,
English), Quick Reference(English:1pc., Japanese:1pc.)

Safety *14

Complies with the requirementsof the following standard.
IEC 61010-1:2001(Class I, Pollution degree 2)

Complies with the requirementsof the following directive
and standards. Low Voltage
Directive 2014/35/EU,
EN 61010-1 (Class I, Pollution
degree 2)

WeightApprox. 6.5 kg (14.3 lb.)

Approx. 8 kg (17.6 lb.)

Dimensions (Max.)214.5(8.45")W×124(155)(4.88")H×400(455)(15.75")Dmm±(0.2 % of reading + 0.3 % of f.s)
H,M

0.00 W to 165.00 W

0.00 W to 330.00 W

L *15

0.000 W to 15.000 W

0.000 W to 30.000 W

L *16

0.0000 W to 1.6500 W

Operation mode

CC/CR mode

Selectable frequency range

1 Hz to 50 kHz

Duty cycle setting

5 % to 95 % in 1 % steps *10

Accuracy of frequency setting±(0.5 % of set)

Selectable range(CC)

On when OVP, OCP, OPP, OHP, UVP, or REV is activated or when an
external alarm input is applied (open collector output from a photocoupler)

16.5 W to 165 W

Accuracy
Display

Release the alarm with a low CMOS level signal

Alarm status output

H

Accuracy
Display

Input /Output
signalAlarm release input

Communication
GPIB, RS232C, and USB interfaces are equipped as standard.
function±(0.1 % of set + 0.1 % of f.s.)Accuracy of setting

Response

Load on/off control input

Outputs range L, M, or H using a 2-bit signal (open collector
output from a photocoupler)

Operating range

Soft start

Automatically turns off the load after a specified time elapses.
an be set to off or a time within the range of 1 s to 999 h 59 min 59 s
26-pin MIL connector

rms *5

Input current variation *9

Slew rate

Auto load-off timer
J1 connector

Switch ranges L, M, and H using a 2-bit signal

Accuracy of setting

Switchingmode

0.0000 W to 3.3000 W

H

2.5 mA/μs to 25 A/μs

5 mA/μs to 50 A/μs

M

250 μA/μs to 2.5 A/μs

500 μA/μs to 5 A/μs

L

25 μA/μs to 250 mA/μs

50 μA/μs to 500 mA/μs

Accuracy of setting *11±(10 % of set + 0.8 μs)

Operation mode

CC modeSelectable times *12

OFF, 100 μs, 200 μs, 500 μs, 1 ms, 2 ms, 5 ms, 10 ms, or 20 ms

Time accuracy±(30 % of set +10 μs)

Response speed

NORMAL, FAST

Remote sensing Voltage that can be compensated 3 V for a single line

Protection
function

Measures the time from load on to load off. Can be turned on andoff. Measures from 1 s up to 999 h 59 min 59 s.

Range status output

Operating range

Wattmeter

Otherfunctions

25 μs for 25 μs to 100 μs, 100 μs for 100 μs to 100 ms±(0.1 % of set + 0.02 % of f.s.*2)

LAmmeter

Time resolution
Elapsed time display

Input voltage variation *4

Accuracy of setting *7

Voltmeter

CC and CR

Range switch input

Resolution

Constant
power (CP)mode

Operation modes

Maximum number of steps 1024
Fast
sequence Step execution time
25 μs to 100 ms±(0.2 % of set + 0.1 % of f.s.*2) + Vin/150 kΩ *3

Operating range

Constant
voltage (CV)mode

Sequencefunction

Maximum number of steps 256
Normal1 ms to 999 h 59 min
sequence Step execution time
1 ms for 1 ms to 1 min, 100 ms for 1 min to 1 h, 1 s for 1 h to 10 hTime resolution
10 s for 10 h to 100 h, 1 min for 100 h to 999 h 59 min

Accuracy of setting

RippleConstant
resistance(CR) mode

Minimum operating voltage for the switching mode (includes the valueof voltage drop generated by the inductance component of wirings)
increases approximately 40 mV per 1 A/μs of the slew rate setting.

PLZ334WL

CC, CR, CV, and CP

Overvoltage protection (OVP)

Turns off the load at 115 % of the rated voltage

Overcurrent protection (OCP)

Setting range 10 % to 110 % of the rated current. Load off or limit selectable.

Overpower protection (OPP)

Setting range 10 % to 110 % of the rated power. Load off or limit selectable.

Overheat protection (OHP)

Turns off the load when the heat sink temperature reaches 90 °C

Undervoltage protection (UVP) Turns off the load when detected. Can be set in the range of 0.3 V to 30 V.

Southwood
Chigasaki-chuo,Tsuzuki-ku,Yokohama,224-0032,Japan
Reverse4F,6-1
connection
protection (REV) By diode and fuse. Turns off the load when an alarm occurs.
Phone: (+81)45-482-6353,Facsimile: (+81)45-482-6261,www.kikusui.co.jp

1-310-214-0000 www.kikusuiamerica.com
3625 Del Amo Blvd, Suite 160, Torrance, CA 90503
Phone : 310-214-0000 Facsimile : 310-214-0014▲ Rear panel(Not available for the load input terminal on the rear panel)*1 Minimum voltage at which the current starts flowing to the electronic load.
At the load input terminal.
*2 In the M range, it applies for the full scale of the H range*3 Vin : Input terminal voltage or the sensing voltage of the electronic load.
*4 When the input voltage is varied from 0.3 V to 30 V at a current of the rated power/30 V*5 Measurement frequency bandwidth : 10 Hz to 1 MHz*6 Measurement frequency bandwidth : 10 Hz to 20 MHz*7 Conversion rate of the input current. At the sensing terminal.
*8 set=Vin/Rset*9 With respect to a change in the current of 10 % to 100 % of the rating at an input
voltage of 0.3 V(during remote sensing)*10 The minimum time width is 2 μs. Between 5 kHz to 50 kHz, the maximum duty cycle
is limited by the minimum time width.
*11 Time to reach from 10 % to 90 % when the current is varied from 2 % to 100 %(20 % to 100 % in M range)*12 Time to reach from 10 % to 90 % of the input current*13 Approximately 35 A for the input voltage of AC100 V*14 This product is categorized in the "Class I". The protective conductor terminal ofthis product must be connected to the ground. The safety can not be guaranteed
when it is not connected to the ground properly.
*15 In a mode other than CP mode
*16 In CP mode

■ All products contained in this catalogue are equipment and devices that are premised on use under the supervision of qualifi ed personnel, and are not designed or produced for homeuse or use by general consumers. ■ Specifi cations, 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 brand names contained in this catalogue represent the respective registered trade name ortrade mark. ■ Colors, textures and so forth of photographs shown in this catalogue may differ from actual products due to a limited fi delity in printing. ■ Although every effort has been madeto provide the information as accurate as possible for this catalogue, certain details have unavoidably been omitted due to limitations in space. ■ If you fi nd any misprints or errors in thiscatalogue, it would be appreciated if you would inform us. ■ Please contact our distributors to confi rm specifi cations, price, accessories or anything that may be unclear when placing anorder or concluding a purchasing agreement.

www.kikusui.cn
Room 305,Shenggao Building , No.137,Xianxia Road, Shanghai City, China
Phone : 021-5887-9067 Facsimile : 021-5887-9069
Printed in Japan

Issue: Oct.2019 201910PDFEC51a