KEISOKU GIKEN Co., Ltd.

High-end multifunctional electronic load

SeriesThe ultimate DC electronic load!
1kW

300W

DC high-speed electronic load
300W : ￥Please contact us
1kW : ￥Please contact us~10kW max.

“3-minute guide” for “Load Station Series”
Now available on Youtube. *only Japanese
https://www.keisoku.co.jp/pw/support/movie-info/

Series● Oscilloscope-like electronic load is truly a "UI revolution● Lineup of 4 models (120V / 500V each) in 300W and 1kW● Equipped with a variety of load and operating modes● Linear operation" with no concept of minimum operating voltage realizes"like electronic resistance″!

■ Lineup of 4 models in 300W and 1kW
The Load Station series offers two types (120V, 150V) of
300W/1kW with different rated voltages.
Select the 120V type for applications with relatively high current
and the 500V type for high voltage applications.
The booster function is provided as standard, so if the capacity of
one unit is not sufficient, up to 10 units (10 kW in the case of the
1 kW type) can be easily connected (same voltage model).
(for the same voltage model) can be easily expanded.
type name● Capable of ripple noise/high accuracy DC voltage measurement（※ 1）● Significant weight reduction（300W type: 6.5kg 1kW type: 13kg）● Independently configurable current rise/fall times from 1 μ s minimum（※ 2）● GP-IB and DIDO control available（※ 3）● Remote control via LAN is possible（※ 4）※ 1：Factory option※ 3：Option: LX-OP01※ 2：When CC in dynamic mode
※ 4：Option: LX-OP12● CE marking compliant（Main unit only, optional RC-02A is not included）

Front

Large rotary knob foreasy up/down of current

10-degree tilt on key topsfor improved operability

One-touch memory
function for recalling set
valuesConvenient front load
terminal

With safety terminal block
cover

Self-illuminated load
ON/OFF button

Oscilloscope-like reverse array keys can also
be used as a numeric keypad for numerical
input

Side
Rear
Ripple noise
measurement input(option: RC-02A)

Main power switch
Supports worldwide
power input for use
around the world2

Convenient rear load
terminals for rack
mounting (with safe
terminal block cover)

Front USB for connection to PC and immediate use

The handle is placedon the side of the main
unit for a cleaner top.

LN-300A

120V

Trigger output terminal
External control input(Ai)
Load remote sense input
Remote sense external/
internal toggle switch
Current monitor output/nonisolated (Ao)300W

LN-300C

500V

12A

300W

120V

180A

1kW

LN-1000C

500V

36A

1kW

Electronic load devices may experience current overshoot or
ringing depending on operating conditions; the Load Station
series eliminates such currents with its high-speed current
feedback control technology to achieve ideal current waveforms.
Commercial electronic load (example)

series

4μs/div

200μs/div

The Load Station series has 6 load modes (CC, CR, CV, CP, EXT,SHORT) and 6 operation modes (Normal, Dynamic, Sequence,
Sweep, MPPT (optional), Current Limit). Sequence operation canbe performed from a PC.
Sequence operation requires setting from a PC.
load mode
CC

CR

CV

CP

EXT

SHORT

Normal

○

○

○

○

○

○

Dynamic

○

○

○

○

―

―

Sequence

○

○

○

○

―

―

Sweep

○

○

―

○

―

―

MPPT

○

○

○

ー

ー

ー

Current Limit

○

○

○

○

○

○

■Linear operation "like electronic resistance”
The restriction of electronic load devices that "no current flows
below the minimum operating voltage" has become a common
sense of the past; the Load Station series has "electronic
resistance characteristics" in which the current changes linearly
from zero V, eliminating the need to worry about the minimum
operating voltage. In addition, since there is no need for soft-start
operation, as is generally the case with electronic load devices,
there is no current delay, resulting in an ideal start-up.

■ High-speed response Slew rate max.
30A/µsThe Load Station series offers a fast response time of up to 30 A/µs (LN-1000A) thanks to high-speed current control technology.
The minimum response time is 500ns for all models, realizing fast
start-up even when the set current value is small.
The settable response time varies depending on the range andother conditions.
*High-speed electronic loads are required for testing power
supplies supplied to high-speed devices!
type namec

Maximum slew rate

LN-300A

20 A/ μ s

LN-300C

1 A/ μ s

LN-1000A

30 A/ μ s

LN-1000C

3 A/ μ s

Rise 500 nsec

90%

10%

Commercial electronic load (example)

seriesMinimum Response Timeelectric current

electric current

Voltage

Voltage
Our load equipment

Conventional load device

Booster connector

60A

LN-1000A

Below minimum
operating voltage

GP-IB/DIDO and
LAN interface(Optional)

Rated power■ Combination of load and operating
modes Support for 26 modes of testing

Operation Mode

Easy-to-read 3.5-inch
large color LCD

Eight front points forpursuing ease of use

Rated voltage Rated current■ High-speed current control technology■ Fast response also in constant voltage■ Rising current over/Guaranteed undershootrange specifications
High-speed current control ensures that over/undershootagainst the set current is extremely small and smooth, andprotects the DUT from damage without stressing it.

(CV) mode
In analog circuits, the constant voltage (CV) mode, which makesa particularly large difference, can also respond at high speed, as
well as in the constant current (CC) mode.
Response time *Response start
type name
Fast/Slow switchingtime*.
LN-300A

Fast

45 ms

2 ms

LN-300C

Fast

280 ms

7 ms

LN-1000A

Fast

550 μ s20 μ s

LN-1000C

Fast

110 ms

4 ms

Set current value

load current

No overshoot! High-end multifunction electronic load device

Load current waveforms ofLN-300A/300C
and LN-1000A/100C
Reference example of load current waveformin unstable control state
90% to 100% of set current value

Time (t)accuracy range
Set current value

Load current waveforms of LN-300A/300C
and LN-1000A/100C
Over/Undershoot accuracy range*typ. 値3

■ Ripple Noise/High Accuracy DC Voltage
Measurement
The Load Station series can be equipped with an optional ripple
noise measurement board (RC-02A), which is also capable ofhigh-precision DC voltage measurement. The RC-02A can alsomeasure high-precision DC voltage, making it ideal for measuring
various battery voltages.
Switchingpower supply

Ripple Noise Measurement
Load Station
seriesload current■ MPPT (Maximum Power Point Tracking)function(Option: LX-OP11)
MPPT function (mountain climbing method) required for testing
solar panels (PV), etc., is prepared as an option.
This is a control method that continuously adjusts the operating
voltage and current using CC, CR, or CV mode until maximum
power is obtained.
During operation, a real-time chart (graph) is displayed on the
LCD panel, allowing the user to monitor the operating statusduring operation.
Setting items

OP12), direct control with a PC is possible.

PLC

Trigger output(DO)

Sweep mode is a function that allows voltage and current
measurements to be made while the load current is finely
varied (swept) in three different load modes (CC, CR, andCP), and the results plotted on a color LCD for real-timegraphing. For example, the OCP (overcurrent protection
characteristic) of a switching power supply or the I-V
characteristic of a rechargeable battery can be performed
with a single electronic load, eliminating the need for a PC
or dedicated program.

switching regulator

Trigger output (DO)Current value external
control (AI) 0 to 10V

Overall scan execution interval

10s ～ 999h59m59s

Current monitor (AO) 0 to 5V

OCP test run example

battery■ Booster connection(Capacity up to 10 kW)

conditions can be stored/read out. For example, load values for

Real-time graphing during execution.
Real-time monitoring is possible via themain unit or a communication interface.

various conditions can be stored in addition to minimum/rated/maximum load conditions.

The Load Station series comes standard with a master/slave
booster function that can be used as needed. For example,
multiple electronic loads are normally used separately, andonly when there is insufficient capacity can they be used as

Example of MPTT CC mode execution■ Sequence mode with 1,024 memories

mode, 16-step dynamic operation is available. This enables

shown on the right. Also, by installing a LAN interface (LX-

200ms or 1000ms

Up to 8 different load modes, load set values, and otherIn addition to the general 2-step (HIGH/LOW, binary) dynamic

in addition to the GP-IB interface, which is widely used formeasuring instruments, it can also be connected to a PLC as

Step time interval for overall scan

■ 8 memory functions■ 16-step dynamic (switching) mode MAX
500kHzWhen the optional GP-IB/DIDO board (LX-OP01) is built in,

GP-IB/DIDO Option
Voltage range switching (DIO)
Load ON/OFF(DIO)
Protection and alarm (DIO)
Current range switching (DIO)
Current range switching (DIO) etc.

200ms or 1000ms

operation

Electronic load function + instrument function (optional conﬁguration)

as standard and can be connected from the front panel.

CC,CR,CV

Step time interval for MPPT

■ Sweep mode (built-in test function)

The Load Station series is equipped with a USB interface

Contents

MPPT operation mode

Ripple and noise measurements can be
Ripple and noise measurements canbe displayed at the same time.
No troublesome switching operation is required!

■ Interface/External Control

The Load Station series has 1,024 words of built-in memory
for sequence operation, enabling reproduction of various
current waveforms by transferring data created by a PC tothe built-in memory.
The increment time for each step is common and can be
programmed in the range from a minimum of 1 ms to a
maximum of 1 min.

one large capacity load by connecting a booster and setting
one as the master and the others as slaves.

■ Multi-channel synchronous operation
It can be used to synchronously change the load current inswitching power supplies with multi-channel outputs, etc.
Load ON/OFF and step execution in dynamic mode can besynchronized with the master machine.
Pulse width can be set from the order of μs.
The pulse width can be set from the order of µs.

high capacity*Sample software for sequence settings can be downloaded fromour web site.
https://www.keisoku.co.jp/pw/support/download-doc/●

Up to 10 units
Expandable

waveform can be set graphically on the color LCD. Operation can●be set in either time or period (frequency display).

Synchronous
operation
for up to 10hⒷ●

parallel connection

testing with more detailed current waveforms. The currentⒶ

load current

switching regulator

Load Sta�onseriesⒸ
Master-slave
cable※●Synchronized Load ON (output) is possible

Time

Rack mounting is
also possible!

Dyanmic mode setting waveform

Synchronized start of eachdifferent dynamic mode

■ Software E-Load Player (free of charge)
E-Load Player is a software package containing 6 functions such as various settings and I-V characteristic tests for the Load Station
series, which can be downloaded free of charge from our website.

Sequence Sample Software Setup Screen■ Equipped with load mode automatic switching function

basic setting

The automatic load mode switching function is a function that monitors the output voltage of a battery and switches the load mode when it
reaches a set voltage (e.g., CC+CV) or turns the load off (e.g., CC+OFF) when conducting discharge tests on rechargeable batteries or other devices.

Dynamic setting (1)As shown in the table on the right, it is possible to switch from any mode except EXT (external control) and SHORT to other modes.
* Switching to CC mode is not possible.

start load modechangeover mode4

Measured value expansion

CC

CR

CV

CP

EXT

SHORT

OFF

○

○

○

○

×

×

CC

―

×

×

×

×

×

CR

○

―

○

○

×

×

CV

○

○

―

○

×

×

CP

○

○

○

―

×

×

Dynamic settings (2)measurement log
I-V Characteristics

Download Site https://www.keisoku.co.jp/pw/support/download-doc/
5Application Examples(technical) specification

Automatic inspection of switching power supplies
The PTSmini automatic
testing software (soldseparately) automatesvarious characteristic testsof switching power
supplies and provides a
good/fail judgment.

For I-V characteristics of various batteries,
OCP testing of switching power supplies, etc.

OCP test run example

Using the newly developed sweep mode (PC-less test function), I-V
alone, and OCP characteristics of switching power supplies can be acquired.
battery

standard feature.

EV, HEV, and PHV charger and DC/DC converter evaluation testing■ Discharge Evaluation of Bidirectional Inverters
LN-1000C

booster cable

Bidirectional
inverter■ High-speed constant-current power supply
Multi-CH
16 steps
synchronization
Dynamic operation
Electronic loadfunction allows
device 1synchronized
operation without
the need for a PC.
source→Commercial DC
power supply

U.U.T.

electric current

Source side (electronic load 1)

sink→

The standard booster
function allows foreasy expansion up to
10 kW (10 units).

Synchronous Cable

Electronic load
device 2

EV / HEV / PHV■ High-precision emulation of current waveforms
By connecting a function
generator to the external
control input (EXT. CONT.) of theelectronic load, testing withvarious current waveforms ispossible.

■ Battery Discharge Testing
Function
Generator

EXT. CONT.
In-vehicle
power supply

6

Current range: M

Current range: H
Current range: M

Constant voltage (CV) mode
Voltage setting
Voltage range: H
range
Voltage range: L
Resolution
Constant voltage (CP) mode
Current range: H
Power setting
range
Current range: H
DC voltage measurement
Voltage
Current range: H
measurement
range
Current range: M
Resolution
DC current measurement
Current
Current range: H
measurement
Current range: M
range
Current range: L
Resolution
Power measurement
measurement method

Time

Sink side (electronic load 2)

Current range: H

Voltage range
Resistance setting
range
Resolution

switching regulator

The acquired data can also be transferred to a PC via USB, which is a

60A
120V

12A
500V

180A
120V

36A
500V

100m Ω or less

6m Ω or less

300W

Free Software
Battery discharge curves
can be easily obtained withthe "E-Load Player.

interface
PC Interface
Other
Protection, alarm function
overcurrent protection
overpower protection
Overheat Protection
Overvoltage alarm（※ 4）Reverse connection alarm（※ 4）Power input
Supply voltage/frequency range
Power consumption
Dimensions, weight and load terminal shape
front
Load terminal
shape
rear
Dimensions (W x H x D) / Weight

1kW
I

I
12A

300W

180A

120V

V

300W

3V

36A

Ω

60A

33.3m Ω or less
I

500V

V

33
.3m
Ω

18m Ω or less1V

variable load
sweep
sequence
MPPT (Option: LX-OP11)
Constant current (CC) mode
Current range: H
Current setting
range
Current range: M
Resolution
Current range: L
Constant resistance (CR) mode
Voltage range
Resistance setting
range
Resolution

characteristics of various batteries can be graphed with electronic loads

LN-1000C

100

Load range（※ 2, 3）

steady-state load

Automatic evaluation
software TP(sold separately) can
automatically measurevarious characteristics ofswitching power supplies
and output them as
evaluation reports.

LN-1000AI

Operation Mode

■ Automatic evaluation of switching power supplies

LN-300C

18

Switchingpower supply

Sweep mode enablesgraphing and good/failjudgment of OCP(overcurrent protection)
tests with a stand-alone
electronic load (without
PC).

LN-300A

1000W

6m■ Switching power supply protection function test

The ripple noise
measurement function(factory option: RC-02A),
which can incorporate anelectronic load, makes it
possible to complete output
testing of switching power
supplies with only anelectronic load.

type nameLoad section rating
electric current
Voltageelectric power（※ 1）Internal Minimum Resistance（※ 2）mΩ■ Output characteristic test of s
witching power suppliesmΩ

Various characteristic tests of switching power supplies

1V

120V

V

1000w

3V

500W

V

Constant current (CC), constant resistance (CR), constant voltage (CV), constant power (CP), external
control (EXT), short circuit (SHORT)
Switching operation (up to 16 steps), CC/CR/CV/CP modes supported, single/repeat operation
Sweep R (CR mode), Sweep C (CC mode), Sweep P (CP mode)
CC/CR/CV/CP modes supported, up to 1,024 steps
MPPT CC、MPPT CR、MPPT CV
0A ～ 60A / 5mA
0A ～ 6A / 0.5mA
0A ～ 0.6A / 0.1mA

0A ～ 12A / 1mA
0A ～ 1.2A / 0.1mA
0A ～ 0.12A / 0.02mA

20V
40.000 S ～ 0.005 S（0.025 Ω～ 200 Ω）/4mS
4.0000 S ～ 0.0005 S（0.25 Ω～ 2 k Ω）
/400 μ S
120V
13.333 S ～ 0.0016S（0.075 Ω～ 600 Ω）/1.33mS
1.3333 S ～ 0.00016S（0.75 Ω～ 6 k Ω）
/133 μ S

85V
3.3333 S ～ 0.0004 S（0.3 Ω～ 2.5 k Ω）
/333 μ S
0.33333 S ～ 0.00004S（3 Ω～ 25 k Ω）
/33 μ S
500V
1.1111 S ～ 0.0001 S（0.9 Ω～ 7 k Ω）
/111 μ S
0.11111 S ～ 0.00001S（9 Ω～ 70 k Ω）
/11 μ S

0 V ～ 120V / 10mV

0 V ～ 500V / 50mV

0 V ～ 120V / 10mV

0 V ～ 500V / 50mV

0 V ～ 20V / 2mV

0 V ～ 85V / 10mV

0 V ～ 20V / 2mV

0 V ～ 85V / 10mV

0 W ～ 300W / 50mW
0 W ～ 40W / 5mW

0A ～ 180A / 15mA
0A ～ 18A / 1.5mA
0A ～ 1.8A / 0.3mA

0A ～ 36A / 3mA
0A ～ 3.6A / 0.3mA
0A ～ 0.36A / 0.06mA

20V
85V
120.00 S ～ 0.01 S
10.000 S ～ 0.001 S（0.0083 Ω～ 66.667 Ω） （0.1 Ω～ 833.33 Ω）
/12mS
/1mS
12.000 S ～ 0.001 S
1.0000 S ～ 0.0001S（0.0833 Ω～ 666.67 Ω） （1 Ω～ 8333.3 Ω）/1.2mS/0.1mS
120V
500V
40.000 S ～ 0.005S
3.3333 S ～ 0.0004 S（0.025 Ω～ 200 Ω）（0.3 Ω～ 2.3333 k Ω）
/3.99mS/333 μ S
4.0000 S ～ 0.0005 S
0.33330 S ～ 0.00004S（0.25 Ω～ 2 k Ω）
（3 Ω～ 23.333 k Ω）
/399 μ S/33 μ S

0 W ～ 1000W / 167mW
0 W ～ 120W / 16.7mW

0 ～ 120.00V / 10mV

0 ～ 500.00V / 10mV

0 ～ 120.00V / 10mV

0 ～ 500.00V / 10mV

0 ～ 20.000V / 1mV

0 ～ 85.000V / 1mV

0 ～ 20.000V / 1mV

0 ～ 85.000V / 1mV

0 ～ 60A / 0.5mA

0 ～ 12A / 0.5mA

0 ～ 180A / 1.5mA

0 ～ 36A / 1.5mA

0 ～ 6A / 0.1mA

0 ～ 1.2A / 0.1mA

0 ～ 18A / 0.3mA

0 ～ 3.6A / 0.3mA

0 ～ 0.6A / 0.1mA

0 ～ 0.12A / 0.1mA

0 ～ 1.8A / 0.3mA

0 ～ 0.36A / 0.3mA

Calculation method [voltage measured value x
current measured value].

Calculation method [voltage measured value x
current measured value].

Standard equipment: USB Option: GP-IB/DIDO: LX-OP01, LAN: LX-OP12
Trigger output, current monitor output (non-isolated)
Load-off or current limit function (selectable)
Load-off or power limit function (selectable)
Load-off upon detection of temperature rise in equipment
Load off, alarm occurs
Alarm occurs when reverse connection is detected
AC85V to 264V / 50 Hz ± 2 Hz or 60 Hz ± 2 Hz overvoltage category II
60VA or less
65VA or lessbinding post
M6 terminal
215 x 128.6 x 420 mm / approx. 6.5 kg

M8 terminal
M8 terminal
430 x 128.6 x 450 mm / approx. 13 kg※ 1：It varies depending on the temperature at which this product is used (temperature inside the enclosure) and the operating time.
※ 2：At rear panel load terminals; not the CR mode setting value.
※ 3：The minimum operating voltage varies depending on the current value.
※ 4：The overvoltage and reverse connection alarm function will turn off the load, but the voltage that caused the problem will remain applied. Remove the cause of
the problem as soon as possible.

7Order Information
type nameContents

LN-300A

Price

120V, 60A, 300W, 20A/ μ s

LN-300C

500V, 12A, 300W, 1A/ μ s

LN-1000A

120V, 180A, 1kW, 30A/ μ s

LN-1000C

500V, 36A, 1kW, 3A/ μ s
inspection reportElectronic Load Body Inspection Report(XXX is the model name)
RC-02A Inspection Report
Traceability by Product(Inspection report (Japanese version only) must be ordered)(Two copies are required for those with RC-02A)
Standard Instrument Test Report(Test report (Japanese version only) must be ordered)(Two copies are required for those with RC-02A)
Shipping Options
Ripple Noise Measurement Module
MPPT mode addedInterface Accessories
GP-IB/DIDO Option
LAN interface option
Cable Accessories
Master/slave connection cable

LN-XXX/REC
RC-02A/REC
TCP

SCI

RC-02A
LX-OP11
LX-OP01*2
LX-OP12*2
LX-OP03*1

Rack Mount Accessories
Rack Mount Kit JIS TypeRackmount Kit EIA TypeRack Mount Kit Blank Panel

LX-RK-JIS
LX-RK-EIA
LX-BP

Please contact us

Please contact us

Please contact us

Please contact us

Please contact us

Please contact us*1 The master/slave connection cable option is required for the number of units to be connected. *2 The optional interfaces (LX-OP01 and LX-OP12) cannot be installed at the same time, so you must select one of them.

Dimensions

LN-300A / LN-300C
Front

LN-1000A / LN-1000C
Front

Rear

Rear

Side

Side

●The information in this catalog is current as of June 2023. ●For purchase, please confirm the latest specifications, price and delivery date. ●Allcompany and product names mentioned herein are trademarks or registered trademarks of their respective companies. ●Specifications and shapes
are subject to change without notice. ●While every effort has been made to ensure that the information provided is accurate, please contact us if you
notice any errors.

KEISOKU GIKEN Co., Ltd.

AgentsPowerElectronics Sales Dept.

Hiyoshi Operation

4-11-1 Minamikase, Saiwai-ku, Kawasaki-shi,
Kanagawa, Japan
TEL +81-44-223-7950 FAX +81-44-223-7960

E-mail : PWsales@hq.keisoku.co.jp / https://www.keisoku.co.jp
Issued June 2023 ● CP-0108-2306