Kikusui PLZ-5W Series User manual

PLZ205W
PLZ405W
PLZ1205W
User’s Manual
PLZ-5W Series Electronic Load
Contents 5
Component Names 8
Installation and Preparation 12
Basic Functions 19
Advanced Functions 41
Sequence Function 55
External Control 69
Parallel Operation 80
System Settings 84
Maintenance 95
Specifications 98
Appendix 107
PART NO. IB027941
Mar. 2016

2PLZ-5W
This manual provides an overview of the product and notes on
usage. It also explains how to configure it, operate it, perform
maintenance on it, and so on. Read this manual thoroughly
before use, and use the product properly.
Intended readers
These manuals are intended for users of this product and their
instructors. The manual assumes that the reader has knowl-
edge about power supplies.
Manual construction
• User's manual (this manual)
This document is intended for first-time users of this prod-
uct. It provides an overview of the product, notes on usage,
and specifications. It also explains how to connect the prod-
uct, configure the product, operate the product, perform
maintenance on the product, and so on.
• Communication Interface Manual (partially in PDF)
This document describes remote control. The interface
manual is written for readers with sufficient basic knowledge
of how to control measuring instruments using a personal
computer.
• Quick Reference
This document briefly explains the control panel and the
basic operation of it.
• Setup Guide
This document is intended for first-time users of the product.
It gives an overview of the product, connecting procedures,
safety precautions, etc. Please read this manual before you
operate the product.
• Safety Information
This document contains general safety precautions. Keep
them in mind and make sure to observe them.
PDF and HTML files are included in the accompanying CD-
ROM. You can view the PDF files using Adobe Reader 10 or
later.
Microsoft Internet Explorer 11 or later is required to view the
HTML files.
Firmware versions that this manual covers
This manual applies to products with firmware versions 1.0X.
For information on how to check the current firmware version,
see “Displaying the Device Information” (p.94).
When contacting us about the product, please provide us with:
The model (marked in the top section of the front panel)
The firmware version (p.94)
The serial number (marked on the rear panel)
Trademarks
Microsoft and Windows are either registered trademarks or
trademarks of Microsoft Corporation in the United States and/
or other countries.
Other company names and product names used in this man-
ual are generally trademarks or registered trademarks of the
respective companies.
Copyrights
Reproduction and reprinting of this operation manual, whole or
partially, without our permission is prohibited.
Both unit specifications and manual contents are subject to
change without notice.
© 2016 Kikusui Electronics Corporation
About Operation Manual
PDFPDF
HTMLHTML
PaperPaper
PDFPDF
PaperPaper
PDFPDF
PaperPaper
PDFPDF

PLZ-5W 3
Check that all accessories are included and that the main unit
and accessories have not been damaged during transporta-
tion.
If any of the unit and accessories are damaged or missing,
contact your Kikusui agent or distributor.
We recommend that you keep all packing materials, in case
the product needs to be transported at a later date.
Accessories
The PLZ-5W Series Electronic Load is a multifunctional sys-
tem designed to offer the highest levels of reliability and
safety. The electronic load contains a stable and high-perfor-
mance current control circuit that enables high-speed load
simulations. Designed to allow high-precision current setting, it
provides outstanding resolution.
Because the electronic load comes standard with RS232C,
USB, and LAN communication functions, it can easily be
incorporated into a wide range of inspection systems.
PLZ-5W series lineup
Features
In addition to basic constant current, constant resistance, con-
stant voltage, and constant power modes, the PLZ-5W Series
offers a variety of other features. The PLZ-5W series also pro-
vides better performance than previous models.
High-speed response
The rise time has been improved from 10 µs to 5 µs.
Expanded voltage range
The minimum operating voltage has been improved from
1.5 V to 1.0 V, offering support of low voltage input.
Arbitrary I-V characteristics mode
Arbitrary I-V characteristics mode that allows current to be
set arbitrarily in relation to voltage input. This mode can be
used for simulation of LED loads and the like.
Color liquid crystal display (LCD)
Allows easy-to-see display in color. The voltage value, cur-
rent value, power value, current capacity value (Ah), and
power capacity value (Wh) at the load input terminal are
indicated on the display.
Increased power capacity and current capacity
Power capacity and current capacity 1.2 times those of pre-
vious models have been realized while keeping the size
unchanged.
Larger capacity achievable
Larger capacity can be achieved by connecting optional
boosters (PLZ2405WB) to the PLZ1205W. Up to four
booster units can be operated in parallel using a PLZ1205W
unit as the master unit (up to 10.8 kW, 2160 A).
Support of synchronized operation
On/off control and the execution of sequences can be syn-
chronized for multiple PLZ-5W units.
RS232C, USB, and LAN communication functions
provided as standard
These functions allow easy incorporation into various types
of inspection systems.
GPIB function available as option*
Using the optional GPIB converter (p.130), the GPIB func-
tion can be used via the RS232C or USB interface.
* Limitation apply to some of the functions.
Checking the Package Contents
Rear-panel load input
terminal cover ( 1 pc.)
Front-panel load input
terminal cover ( 1 pc.)
Front-panel load
input knob set (1 set)
Load input terminal
screw set (2 sets)
Power cord (1 pc. Cord length: Approx. 2.5 m)
[M1-100-119]
[M5-101-008]
[M4-100-008]
CD-ROM (1 disk)
Setup Guide (1 pc.)
Safety Information (1 pc.)
Quick Reference
(Japanese 1 sheet,
English 1 sheet)
Plug: NEMA5-15
Rating: 125 Vac/10 A
[85-AA-0004]
Plug: CEE7/7
Rating: 250 Vac/10 A
[85-AA-0005]
Plug: GB1002
Rating: 250 Vac/10 A
[85-10-0790]
or or
[M5-100-008]
Cover
[Q1-500-161]
Screw [M8-600-021]
Top [Q1-500-156]
Bottom [Q1-500-157]
External control
connector kit (1 set)
[83-20-0190]
+(red)
[N8-000-003]
í(black)
[N8-000-002]
The attached power cord varies depending on
the shipment destination.
Screws for the rear-panel
load input terminal cover
(2 pcs.) [M3-112-018]
Model Maximum oper-
ating current
Operating
voltage
Power
PLZ205W 40 A 1 V to 150 V 200 W
PLZ405W 80 A 1 V to 150 V 400 W
PLZ1205W 240 A 1 V to 150 V 1200 W
PLZ2405WB1
1 PLZ1205W dedicated booster
480 A 1 V to 150 V 2400 W
Product Overview

4PLZ-5W
• In this manual, electronic loads PLZ205W, PLZ405W, and
PLZ1205W are sometimes referred to as “PLZ-5W”.
• The term “PC” is used to refer generally to both personal
computers and workstations.
• The screen captures and illustrations used in this manual
may differ from the actual items.
• The following markings are used in the explanations in this
manual.
Indicates a potentially hazardous situation which, if
ignored, could result in death or serious injury.
Indicates a potentially hazardous situation which, if
ignored, may result in damage to the product or other
property.
Indicates information that you should know.
Indicates a reference manual (CD-ROM) containing
detailed information.
Indicates useful information.
When using this product, be sure to observe the “Safety Pre-
cautions” in the Safety information manual. The following pre-
cautions pertain only to this product.
Cover
• The rear panel may become hot during operation. If you
touch it, you may burn yourself.
When installing this product, be sure to observe the “Precau-
tions Concerning Installation Location” in the Safety informa-
tion manual. The following precautions pertain only to this
product.
• When installing this product, be sure to observe the tem-
perature and humidity ranges indicated below.
Operating temperature range: 0 °C to 40 °C
(32 °F to 104 °F)
Operating humidity range: 20%rh to 85%rh
(no condensation)
• When storing this product, be sure to observe the tempera-
ture and humidity ranges indicated below.
Storage temperature range: -20 °C to 70 °C
(-4 °F to 158 °F)
Storage humidity range: 90 %rh or less (no condensation)
• Do not install the product vertically.
It may cause injury to the operator or damage to the product
when it falls down.
Notations Used in This Manual
WARNING
CAUTION
Memo
Safety Precautions
Precautions Concerning
Installation Location

PLZ-5W series 5
Contents
About Operation Manual .......................................2
Checking the Package Contents ...........................3
Product Overview ..................................................3
Notations Used in This Manual .............................4
Safety Precautions ................................................4
Precautions Concerning
Installation Location ..............................................4
Component Names ................................................8
1.Installation and
Preparation
Rack Mounting the PLZ-5W Series.................. 12
Removing the handle and the rubber feet ........... 12
Attaching the rack adapter or bracket.................. 12
Connecting the Power Cord............................. 13
Checking Whether the Power Is On or Off .............. 14
Turning the power on........................................... 14
Turning the power off........................................... 14
Connecting to the Load Input Terminals .......... 15
Connecting to the load input terminals on the rear
panel ................................................................... 15
Connecting to the load input terminals on the front
panel ................................................................... 17
Notes regarding load input terminals ................... 18
2.Basic Functions
Panel Operations ............................................. 19
Using the function keys........................................ 19
Inputting numbers/characters .............................. 20
Load On/Load Off ............................................ 20
Setting the Operation Mode ............................. 21
Setting constant current (CC) mode .................... 21
Setting constant resistance (CR) mode ............... 21
Setting constant voltage (CV) mode .................... 22
Setting constant power (CP) mode...................... 22
Adding CV mode to CC mode (CC+CV).............. 23
Adding CV mode to CR mode (CR+CV).............. 24
Setting arbitrary I-V characteristics (ARB) mode. 25
Setting the Current Range / Voltage Range ............ 27
Setting the Slew Rate ...................................... 27
Setting the Short Function ............................... 28
Switching Function........................................... 29
Setting the switching level ................................... 29
Setting the switching interval ............................... 29
Turning the switching function on/off ................... 31
Timing of trigger signal output.............................. 31
Alarm Function ................................................ 32
Alarm types and operation ................................... 32
Setting overcurrent protection (OCP)................... 33
Setting overpower protection (OPP) .................... 33
Setting undervoltage protection (UVP) ................ 34
Setting watchdog protection (WDP)..................... 35
When an alarm occurs......................................... 35
Clearing an alarm................................................. 35
Measurement Function ................................... 36
Overview of the measurement function ............... 36
Starting/stopping measurement........................... 36
Obtaining the measurement data......................... 36
Setting triggers..................................................... 37
Recording Integrated Data .............................. 39
Recording current capacity/power capacity/elapsed
time...................................................................... 39
Displaying the integrated data ............................. 40
3.Advanced Functions
Changing the Response Speed ...................... 41
Soft Start ......................................................... 42
Remote Sensing.............................................. 43
Connecting the sensing cables............................ 43
Enabling remote sensing ..................................... 44
Trigger Function .............................................. 45
Auto Load Off Timer........................................ 45
Types of Memory ............................................ 46
ABC Preset Memories..................................... 47
Saving to ABC preset memories.......................... 47
Recalling ABC preset memory entries ................. 48
Setup Memory................................................. 48
Saving to the setup memory ................................ 48
Recalling the setup memory ................................ 49
Checking the setup memory details..................... 49
Synchronized Operation.................................. 50
Connection for synchronized operation ............... 50
Synchronizing the load on/off operation............... 51
Synchronizing measurements.............................. 52
Synchronizing the start of sequences.................. 52
Synchronizing the resuming of sequences .......... 53
Remote Control ............................................... 54
Releasing remote control..................................... 54
4.Sequence Function
Overview of the Sequence Function ............... 55

6PLZ-5W series
Programs and steps ............................................. 55
Main features........................................................ 55
Program Settings ............................................. 56
How to view the program editing screen .............. 56
Creating a program .............................................. 56
Setting the number of loops of a program ............ 57
Setting the voltage of CV mode addition (+CV).... 57
Setting protection functions .................................. 58
Changing a program name................................... 58
Deleting a program............................................... 59
Setting Steps.................................................... 60
Creating steps ...................................................... 60
Deleting a step ..................................................... 62
Sequence creation tutorial ............................... 62
Newly creating program1 ..................................... 63
Registering steps to program1 ............................. 63
Executing, Pausing, and Stopping Sequences ........ 66
Executing a sequence .......................................... 66
Pauses the sequence........................................... 66
Stopping a sequence............................................ 67
Setting triggers ..................................................... 67
5.External Control
Preparation for External Control ...................... 69
Precautions for high-speed load simulations........ 69
Connecting the EXT CONT connector ................. 70
EXT CONT connector pin arrangement ............... 71
Load Setting Control ........................................ 72
Constant current (CC), constant resistance (CR), and
constant power (CP) control ................................ 72
Constant voltage (CV) control .............................. 73
Controlling the current to be superimposed on the
constant current (CC) ........................................... 74
Control of Load On/Load Off .................................... 75
Load on/off control input....................................... 75
Load-on status signal output ................................ 76
Control of the Current Range ........................... 76
Range control input .............................................. 76
Range status output ............................................. 76
Control of the Alarm Signal .............................. 77
Alarm input ........................................................... 77
Alarm clearing input.............................................. 77
Alarm status output .............................................. 77
Trigger Input/Output......................................... 78
Trigger input ......................................................... 78
Trigger output ....................................................... 78
Digital I/O ......................................................... 78
Using the Current Monitor Signal..................... 79
Current monitor output ......................................... 79
6.Parallel Operation
Overview of Parallel Operation ....................... 80
Parallel operation using the same model ................ 81
Performing connections for parallel operation ..... 81
Performing parallel operation .............................. 83
Slew rate and response speed settings during
parallel operation ................................................ 83
Protection function during parallel operation
(parallel operation anomaly detection)................ 83
Canceling parallel operation ................................ 83
7.System Settings
Displaying/Changing the Basic Settings ......... 84
Panel settings at startup ...................................... 85
Screen saver ....................................................... 85
Key lock ............................................................... 86
Setting the beep sound........................................ 87
Setting the DIGITAL2 signal input/output ............ 87
Displaying/Changing the Interface Settings............. 88
Resetting the interface settings ........................... 89
Returning the interface settings to the factory default
settings................................................................ 89
Displaying SCPI Errors ................................... 90
Setting the Date/Time ..................................... 90
Factory Default Settings and Reset Settings........... 91
Restoring the factory default settings .................. 91
Restoring the reset settings................................. 91
Main settings at factory default and at reset........ 92
Updating.......................................................... 94
Displaying the Device Information................... 94
8.Maintenance
Inspection ........................................................ 95
Cleaning the panels............................................. 95
Overhaul .............................................................. 95
Backup battery replacement................................ 95
Calibration ........................................................... 95
Malfunctions and Causes ................................ 96
9.Specifications
Ratings ................................................................ 98
Constant current (CC) mode ............................... 98
Constant resistance (CR) mode .......................... 99
Constant voltage (CV) mode ............................... 99
Constant power (CP) mode ............................... 100

PLZ-5W series 7
Arbitrary I-V characteristics (ARB) mode........... 100
Measurement function ....................................... 100
Switching function.............................................. 101
Slew rate............................................................ 101
Soft start ............................................................ 101
Alarm Feature .................................................... 102
Sequence function ............................................. 102
Other functions .................................................. 103
Common specifications...................................... 103
General specifications ....................................... 105
External dimensions .......................................... 106
10.Appendix
Selecting the Load Cables ............................. 107
Methods to Stabilize Operation...................... 108
Reducing the load cable inductance.................. 108
Optimizing the response speed ......................... 109
Using remote sensing ........................................ 109
Slew Rate for Small Currents......................... 110
Operating Area............................................... 111
Basic operation modes ....................................... 111
Operation of the constant current (CC) mode.... 112
Operation in constant resistance (CR) mode..... 113
Constant power (CP) mode operation ............... 115
Constant voltage (CV) mode operation ............. 116
Operation when CV Mode is Added to CC Mode ......
118
Operation when CV Mode is Added to CR Mode ......
119
Operating Area of Each Model .......................... 121
Response Time and Waveform When an OPP Is Acti-
vated ......................................................................... 124
Response time................................................... 124
waveform ........................................................... 124
Main Specifications for Parallel Operation............. 126
Parallel operation using the same type of electronic
loads.................................................................. 126
Parallel operation using boosters ...................... 128
Options........................................................... 129
Rack adapters, brackets .................................... 129
GPIB converter (PIA5100) ................................. 130
Parallel operation signal cable kit (PC01-PLZ-5W) ...
130
Low inductance cable ........................................ 130
Large current load cable .................................... 130
INDEX ................................................................131

8PLZ-5W
Component Names
Front panel
No. Name Function See
1 Protection plate This plate protects the load input terminal on the front panel. The DUT and the
PLZ-5W can be connected by removing the protection plate and attaching the
front panel load input terminal cover. When not using the load input terminal on
the front panel, be sure to attach the protection plate.
p.17
2 Handle Handle for carrying the PLZ-5WL. p.12
3 Air inlet Inlet holes for cooling. –
4 USB port (host) This connector is used to connect an external keyboard and to perform updates. p.20
p.94
5 I MON OUT connector Current monitor output terminal. p.79
6 TRIG OUT terminal Trigger signal output terminal. p.78
7 POWER switch Press the ( ) side to switch the power on, and the ( ) side to switch the power off. p.14
8 Feet PLZ205W/PLZ405W: 4 locations on bottom panel.
PLZ1205W: 4 locations on bottom panel, 4 locations on side panel.
p.12
9 DC INPUT terminal
(Load input terminal on the
front panel)
Used for simple connection with the DUT. The specifications are for the load input
terminal on the rear panel and the load input terminal on the front panel may not
meet the specifications.
p.17
PLZ205W
PLZ405W
(PLZ205W example)
PLZ1205W
12
2
345 6
8
7
34568
1
7
8
9

PLZ-5W 9
Controls
No. Name Function See
1 Display Displays the settings, measured values, and other information. p.10
2 Function keys Each function key executes the item that is displayed above that key (function area). p.19
3 Sub-function keys Each sub-function key executes the item that is displayed to the left of that key
(sub-function area).
p.19
4 Numeric keypad Enters values. p.20
5 CLEAR key Deletes numbers/characters. p.20
6←/ →keys Move the cursor left and right. Select the left or right item. p.20
7 ENTER key
KEY LOCK key
Confirms the input value when performing numeric keypad input. Confirmation after
selection of setting item. Hold down to lock the keys.
p.20
8 ESCAPE key
LOCAL key
Cancels numeric/character input. Closes the window.
Returns remote control to panel operation.
p.20
p.54
9 Rotary knob Item selection. Inputs numbers/characters. p.20
10 LOAD key Used to turn load on and off. p.20
11 Menu key Used to switch the item that is shown on the display. p.19
SOURCE key Basic functions including operation modes, current/resistance/power/voltage/slew rate
value setting, voltage range, current range, short function, switching function, alarm func-
tion, sequence start trigger function, response speed, soft start, external control, auto
load off timer, ABC preset memories and load on/off synchronization.
–
MEASURE key Function related to measurement, measurement trigger function, measurement functions
such as integrated data recording/display.
p.36
p.39
SEQUENCE key Functions related to sequence. p.55
SYSTEM key Remote sensing, system settings, interface settings, setup memory, display of SCPI
errors, date setting, restore factory default setting, update, display of device information.
p.84
123
4
5
6
10 11
9
8
7

10 PLZ-5W
Display
No. Name Function See
1 Setting of operation mode Displays the currently selected operation mode. p.21
2 Current range Displays the current range. p.27
3 Voltage range Displays the voltage range. p.27
4 Remote control mode Indicates that the product is being controlled remotely. p.54
5 Operation mode Displays the currently running operation mode. —
6 LAN connection status Displays the status of the LAN connection.
Green: Communication enabled. Orange: Preparing for communication.
Red: Not connected.
—
7 Icon display —
Indicates that the switching function is currently being used. p.31
Indicates that measured values are being recorded. p.36
Indicates that remote sensing is in progress. p.43
// Indicates that key lock is on. The key lock level is displayed numerically. p.86
Sequence in progress. p.66
Displayed when SCPI error occurs. The number of error incidents (up to 16) is dis-
played numerically.
p.90
8 Sub-function area Indicates that execution is possible with the keys (sub-function keys) in the right
side of the display.
p.19
9 Function area Indicates that execution is possible with the keys (function keys) at the bottom of the
display.
p.19
10 Message area Displays alarm messages. p.32
11 Measured value display Displays the current, voltage, and power values.
The load input ratio for each rating is displayed in bar graph form under the current
value and voltage value.
—
12 Integrated data display When integrated data display is enabled, displays the integrated data. p.40
13 Value Displays load settings (current, conductance, voltage, power) and other settings
such as slew rate and alarm operating conditions.
—
1
10
11
12
13
234675
8
9

PLZ-5W 11
Rear panel
No. Name Function See
1 EXT CONT connector External control connector. A cover for the pins is provided. p.69
2 SENSING connector Remote sensing connector. p.43
3 DC OUT connector Used during GPIB converter (option) use. p.130
4 DC INPUT terminal
(load input terminal on
the rear panel)
Used to connect the DUT and the PLZ-5W. p.15
5 PARALLEL connector Connector for parallel operation. p.81
6 EXT SYNC connector Connector for synchronized operation. p.50
7 USB port (device) USB port for remote control.
Interface
Manual
8 LAN port LAN port for remote control.
9 RS232C port RS232C port for remote control.
10 AC INPUT connector Power inlet. p.13
11 Serial number PLZ-5W manufacturing number. —
12 Air outlet Air outlet for cooling. —
PLZ205W
PLZ405W
(PLZ205W example)
123
123
5
4
8 9 10 11 12
12
89 10 11
6
7
6
7
5
4
PLZ1205W

12 PLZ-5W
1Installation and Preparation
Rack Mounting the PLZ-5W Series
The PLZ-5W can be rack mounted using the optional rack adapter or the optional bracket
(p.129). To rack mount the PLZ-5W, remove the handle of the PLZ-5W and the rubber feet.
Removing the handle and the rubber feet
1Remove the two handle covers.
2Unfasten the two M4 flat head screws, and remove the entire handle.
3While pulling down the rubber feet (four locations), loosen their screw
pin with a screwdriver and remove the feet.
Attaching the rack adapter or bracket
• When attaching the rack adapter, refer to the KRA3 or KRA150 manual provided on the
accompanying CD-ROM.
• When attaching the bracket, refer to the KRB3-TOS or KRB150-TOS manual provided on
the accompanying CD-ROM.
• We recommend that you keep all the pieces that you remove from the PLZ-5W. You will
need these pieces if you remove the PLZ-5W from the rack. Particularly when reattaching
the rubber legs, please use the rivets and screw pins that were removed.
• To reinstall the handle that has been removed, use screw locking agent (e.g., 1401B by
ThreeBond International, Inc.) to prevent screws from loosening.
Cover
Bracket
Handle Flat head screw
(M4x0.7x8)
Foot
Screw pin
Rivet
When mounting the PLZ-5W on a rack, be sure to use support angles (auxiliary brackets) to
safely support the product.

PLZ-5W 13
Connecting the Power Cord
The PLZ-5W conforms to IEC Overvoltage Category II (energy-consuming equipment that is
supplied from a fixed installation).
1Turn the POWER switch off ( ).
2
Check that the AC power line meets the nominal input rating of the PLZ-5W.
The PLZ-5W can receive a nominal line voltage in the range of 100 Vac to 240 Vac at
50 Hz or 60 Hz. (Frequency range: 47 Hz to 63 Hz)
3Connect the power cord to the AC INPUT inlet on the rear panel.
4Connect the power cord plug to a properly grounded outlet.
WARNING
Risk of electric shock.
• The PLZ-5W conforms to IEC Safety Class I (equipment that has a protective con-
ductor terminal). Be sure to earth ground the product to prevent electric shock.
• The PLZ-5W is grounded through the power cord ground wire. Connect the protec-
tive conductor terminal to earth ground.
• Use the supplied power cord to connect to the AC line.
If the supplied power cord cannot be used because the rated voltage or the plug shape is
incompatible, have a qualified engineer replace it with an appropriate power cord that is
3 m or less in length. If obtaining a power cord is difficult, contact your Kikusui agent or dis-
tributor.
• The power cord with a plug can be used to disconnect the PLZ-5W from the AC power line
in an emergency. Connect the plug to an easily accessible power outlet so that the plug can
be removed from the outlet at any time.
• Secure adequate space around the power cord plug. Do not insert the power cord plug into
an outlet that is difficult to access or place objects around the power cord plug that will
make plugging and unplugging difficult.
• Do not use the supplied power cord with other instruments.
Connect to a properly
grounded outlet.

14 PLZ-5W
Checking Whether the Power Is On or Off
Turning the power on
1Check that the power cord is connected correctly.
2Check that nothing is connected to the DC INPUT (load input) terminals
on the front and rear panels.
3Turn the POWER switch on ( ).
The display lights.
If you notice strange sounds, unusual odors, fire, or smoke around or from inside the PLZ-
5W, flip the POWER switch off, or remove the power cord plug from the outlet.
By factory default, the panel settings immediately before the POWER switch is turned off are
saved. If you turn the power on, the PLZ-5W starts in the same state as it was in the last time
that it was turned off. (However, the load setting is always Load Off.)
The panel setting state at startup can be changed (p.85).
If the PLZ-5W does not start normally
If the following remedy does not solve the problem, contact your Kikusui agent or distributor.
Turning the power off
Press the ( ) side of the POWER switch to turn the power off.
POWER switch
Status Remedy See
Nothing is shown on the display. Check the power cord connection, and turn the
POWER switch off and then back on.
p.13
Odd current or power value is displayed. Turn off the POWER switch and then turn it back on. –
A protection function has been activated. Remove the cause of the protection function activa-
tion.
p.32
CAUTION
After you turn the POWER switch off, wait at least 5 seconds after the fan stops before you
turn the POWER switch back on. Repeatedly turning the POWER switch on and off at short
intervals will shorten the service life of the POWER switch and the internal input fuse.

PLZ-5W 15
Connecting to the Load Input Terminals
The PLZ-5W has load input terminals on both its front and rear panels. The specifications of
the PLZ-5W are for the load input terminals on the rear panel.
For information on selecting load cables, refer to “Appendix” (p.107) in the “Selecting the
Load Cables”.
Connecting to the load input terminals on the rear panel
Connect the DUT to the load input terminals on the rear panel.
Attaching the load cables
1Turn the POWER switch off ( ).
2Make sure that the output of the DUT is off.
3Attach crimping terminals to the load cables.
The load input terminals on the rear panel have bolt (M10) holes for connecting the
load cables. Attach the appropriate crimping terminals to the cables.
4Connect the load cables to the load input terminals on the rear panel
using the included load input terminal screw set.
To prevent interference with the load input terminal cover, basically connect the crimp-
ing terminals in orientation (1) in the figure. If the crimping terminals are small and
cannot be connected in orientation (1), connect them in orientation (2).
WARNING
Risk of electric shock.
• Do not touch load input terminals when the output is turned on.
• The load input terminals on the front panel are connected internally to the load input
terminals on the rear panel. The voltage applied to the terminal on one side is trans-
mitted directly to the terminal on the other side.
CAUTION
To avoid damaging the product, observe the following precautions.
• Do not connect the DUT to the load input terminals while the PLZ-5W’s load is turned on.
• Do not connect electronic loads to the load input terminals on the front panel and those on
the rear panel at the same time.
• Do not invert the polarity when connecting. An overcurrent might flow when the load is
turned on.
To avoid overheating, observe the following precaution.
• Attach crimping terminals to the cables, and use the supplied screws to connect the cables.
WARNING
Risk of electric shock. Be sure to use the load input terminal cover.
Orientation of crimping terminals
(1) Basic orientation
(2) If crimping terminal is small
Bolt (M10)

16 PLZ-5W
Connecting to the Load Input Terminals 1.Installation and Preparation
Attaching the load input terminal cover
You can adjust the diameter of the holes that the load cables pass through by changing the
positions in which the top and bottom load input terminal covers are put together. There are
two available positions. Use the appropriate position for the load cables that you are using.
•For cables up to ø10 mm: Put the top and bottom load input terminal covers together so
that the hole diameter is small.
•For cables that are between ø10 and 20 mm: Put the top and bottom load input terminal
covers together so that the hole diameter is large.
1Place the bottom half of the load input terminal cover underneath the
cables connected to the load input terminals.
2Align the tabs of the top load input terminal cover with those of the bot-
tom cover.
Align the tabs of the load input terminal cover according to the load cable diameter.
3Push the load input terminal cover against the panel, and fasten it with
the included rear-panel load input terminal cover screws.
Make sure that the screws are securely fastened.
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PLZ-5W 17
1.Installation and Preparation Connecting to the Load Input Terminals
4Connect the load cables to the output terminals of the DUT.
Connect the positive (+) polarity of the load input terminal on the rear panel to the pos-
itive (+) polarity of the DUT, and the negative (−) polarity of the load input terminal on
the rear panel to the negative (−) polarity of the DUT.
Connecting to the load input terminals on the front panel
The load input terminals on the front panel enable you to easily connect the DUT to the PLZ-
5W.
The specifications of the PLZ-5W are for the load input terminals on the rear panel and the
load input terminals on the front panel may not meet the specifications.
1Turn the POWER switch off.
2Make sure that the output of the DUT is off.
3Remove the protection plate of the load input terminals on the front
panel.
Keep the removed protection plate and screws in a safe place. By attaching the pro-
tection plate when not using the load input terminals on the front panel, the PLZ-5W
can be used in a safe and compact manner.
4Attach the cover for the load input terminals on the front panel.
WARNING
• Risk of electric shock. Attach insulation caps to the crimping terminals.
• The rated current value of the load input terminals on the front panel of the
PLZ1205W is 80 A. When a current of 80 A or more flows to the load input terminals
on the front panel, an alarm occurs and load off.

18 PLZ-5W
Connecting to the Load Input Terminals 1.Installation and Preparation
5Insert the load cables from the bottom and tighten the accessory knobs
to fix the cables in place.
6Connect the load cables to the output terminals of the DUT.
Connect the positive (+) polarity of the load input terminal on the front panel to the
positive (+) polarity of the DUT, and the negative (−) polarity of the load input terminal
on the front panel to the negative (−) polarity of the DUT.
Notes regarding load input terminals
Do not apply overvoltage to the load input terminals
When an overvoltage of 165 V is applied when the voltage
range is 150 V, or when an overvoltage of 16.5 V is applied
when the voltage range is 15 V, a beeping sound is emitted
and an alarm screen appears. In that case, immediately
lower the voltage of the DUT.
Match the wiring polarity with that of the DUT
Be careful to match the polarities of the load input terminals with those of the DUT during con-
nection.
If a reverse voltage of 0.6 V or higher is applied, or a
reverse current (approximately -1% of the range rating)
flows, a beeping sound is emitted and an alarm screen
appears. In that case, immediately turn off the POWER
switch of the DUT.
knobknob
Black (í)Red (+)
CAUTION
To avoid damaging the product, observe the following precautions. Do not apply a voltage
that exceeds 150 Vdc to the load input terminals.
CAUTION
Inverting the polarity during connection will cause overcurrent to flow, which may damage
the DUT and the PLZ-5W.
DUT PLZ-5W
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PLZ-5W 19
2Basic Functions
Panel Operations
The PLZ-5W is controlled from the operation panel on the front panel.
Using the function keys
Switching the display
The following two display methods are available.
Pressing Menu while the main display is displayed switches the display to the function dis-
play. Pressing Menu again switches the display to the menu display.
Function keys and sub-function keys
During function display, the functions that are currently
available are displayed above the function keys and to
the left of the sub-function keys. You can execute the
displayed functions by pressing the corresponding
function key or sub-function key.
Operation example (Selection of constant resistance mode)
1Press SOURCE, Mode, and then CR.
In the case of the above procedure, press the buttons in the following order.
Display method Description
Main display Displays the measurement values and settings in a large size.
Function display Zooms out of the display of measurement values and settings, and displays a
menu allowing execution with function keys/sub-function keys.
Main display Function display
Menu key
Function keys
Sub-function
O
A
D
L
O
A
D
SOURCESOURCE11
ModeMode
22
CRCR
33

20 PLZ-5W
Load On/Load Off 2.Basic Functions
Inputting numbers/characters
Front panel
If a cursor appears on the display, you can enter numbers.
Depending on the input location, the input of alphabetic charac-
ters and symbols may be possible.
External keyboard
If you connect a keyboard to the USB port to the front panel, you can enter numbers/charac-
ters with keys and apply them with the Enter key and move between input parameters with
the Tab key.
Load On/Load Off
“Load on” refers to a condition in which a current is running through the PLZ-5W. “Turning the
load on” refers to the operation of running a current through the PLZ-5W. Conversely, “load
off” refers to a condition in which a current is not running through the PLZ-5W. “Turning the
load off” refers to the operation of stopping a current from running through the PLZ-5W. Turn-
ing the PLZ-5W’s load on and off is done with the LOAD key.
1Press LOAD.
The value switches between load on and load off each time you press the key.
In the load on state, the load on LED lights.
In the load off state, the load on LED turns off.
Controlling load on/load off externally
Load on/load off can be controlled using an external signal (p.75).
Gradually increasing the input current of the PLZ-5W
In constant current (CC) mode, you can set to slowly increase the input current.
(Soft start) (p.42).
Turning off the load after a specified time elapses
When performing battery or capacitor discharge tests, it is convenient to use the function
to automatically turn off the load after a specified time elapses (auto load off timer) (p.45).
Purpose Operation Description
Numeric/charac-
ter input
Numeric keypad Following input, press ENTER to confirm the input.
Rotary knob Turn clockwise to increase the value. Turn counterclockwise to
decrease the value. Depending on the input location, the input of
alphabetic characters/symbols may be possible by continuing to
turn the rotary knob. ENTER need not be pressed following input.
Cursor movement ←/ →keys Change in number of digits or input position.
Delete CLEAR key Clears the input characters.
Cancel ESCAPE key Cancels numeric/character input.
Cursor
LOAD keyLoad-on LED