Kikusui PLZ150U Installation manual

Part No. Z1-002-982, IB00485B
Mar. 2018
OPERATION MANUAL
ELECTRONIC LOAD PLZ-U Series
PLZ 70UA
PLZ 150U
PLZ - 30F
PLZ - 50F

Use of Operation Manual
Please read through and understand this Operation Manual before operating the product. After reading,
always keep the manual nearby so that you may refer to it as needed. When moving the product to another
location, be sure to bring the manual as well.
If you find any incorrectly arranged or missing pages in this manual, they will be replaced. If the manual
gets lost or soiled, a new copy can be provided for a fee. In either case, please contact Kikusui distributor/
agent, and provide the “Kikusui Part No.” given on the cover.
This manual has been prepared with the utmost care; however, if you have any questions, or note any
errors or omissions, please contact Kikusui distributor/agent.
Reproduction and reprinting of this operation manual, whole or partially, without our permission is prohib-
ited.
Both unit specifications and manual contents are subject to change without notice.
Copyright© 2004 Kikusui Electronics Corporation

PLZ-U Safety Symbols I
Indicates an imminently hazardous situation which, if ignored,
will result in death or serious injury.
Indicates that a high voltage (over 1000 V) is used here. Touch-
ing the part causes a possibly fatal electric shock. If physical
contact is required by your work, start work only after you make
sure that no voltage is output here.
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 and other property.
Shows that the act indicated is prohibited.
Is placed before the sign “DANGER,” “WARNING,” or “CAU-
TION” to emphasize these. When this symbol is marked on the
product, see the relevant sections in this manual.
Indicates a protective conductor terminal.
Indicates a chassis (frame) terminal.
OR
WARNING
CAUTION
DANGER
Safety Symbols
For the safe use and safe maintenance of this product, the following
symbols are used throughout this manual and on the product. Under-
stand the meanings of the symbols and observe the instructions they
indicate (the choice of symbols used depends on the products).

II Safety Precautions PLZ-U
Safety Precautions
The following safety precautions must be observed to avoid
fire hazard, electrical shock, accidents, and other failures.
Keep them in mind and make sure that all of them are observed
properly.
Users
• This product must be used only by qualified personnel who understand the con-
tents of this operation manual.
• If it is handled by disqualified personnel, personal injury may result. Be sure to han-
dle it under supervision of qualified personnel (those who have electrical knowl-
edge.)
• This product is not designed or manufactured for general home or consumer use.
Purposes of use
• Do not use the product for purposes other than those described in the operation
manual.
Input power
• Use the product with the specified input power voltage.
• For applying power, use the power cord provided. Note that the provided power
cord is not use with some products that can switch among different input power
voltages or use 100 V and 200 V without switching between them. In such a case,
use an appropriate power cord.
Fuse
• With products with a fuse holder on the exterior surface, the fuse can be replaced
with a new one. When replacing a fuse, use the one which has appropriate shape,
ratings, and specifications.
Cover
• There are parts inside the product which may cause physical hazards. Do not
remove the external cover.
Operation
Manual
Line
Voltage

PLZ-U Safety Precautions III
Installation
• When installing products be sure to observe 2.2, “Precautions Concerning Instal-
lation Location” described in this manual.
• To avoid electrical shock, connect the protective ground terminal to electrical
ground (safety ground).
• When connecting the power cord to a switchboard, be sure work is performed by
a qualified and licensed electrician or is conducted under the direction of such a
person.
• When installing products with casters, be sure to lock the casters.
Relocation
• Turn off the power switch and then disconnect all cables when relocating the
product.
• Use two or more persons when relocating the product which weights more than
18 kg. The weight of the products can be found on the rear panel of the product
and/or in this operation manual.
• Use extra precautions such as using more people when relocating into or out of
present locations including inclines or steps. Also handle carefully when relocat-
ing tall products as they can fall over easily.
• Be sure the operation manual be included when the product is relocated.
Operation
• Check that the AC input voltage setting and the fuse rating are satisfied and that
there is no abnormality on the surface of the power cord. Be sure to unplug the
power cord or stop applying power before checking.
• If any abnormality or failure is detected in the products, stop using it immediately.
Unplug the power cord or disconnect the power cord from the switchboard. Be
careful not to allow the product to be used before it is completely repaired.
• For output wiring or load cables, use connection cables with larger current capac-
ity.
• Do not disassemble or modify the product. If it must be modified, contact Kikusui
distributor/agent.
Maintenance and checking
• To avoid electrical shock, be absolutely sure to unplug the power cord or stop
applying power before performing maintenance or checking.
• Do not remove the cover when performing maintenance or checking.
• To maintain performance and safe operation of the product, it is recommended
that periodic maintenance, checking, cleaning, and calibration be performed.
Service
• Internal service is to be done by Kikusui service engineers. If the product must be
adjusted or repaired, contact Kikusui distributor/agent.
Check?

IV Contents PLZ-U
Contents
Safety Symbols ____________________________________________ I
Safety Precautions ________________________________________ II
Chapter 1 General Description 1-1
1.1 About This Manual - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
1.2 Product Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
1.3 Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-3
1.4 Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-5
Chapter 2 Installation and Preparation 2-1
2.1 Checking the Package Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2.1.1 Frame - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2.1.2 Load Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-3
2.2 Precautions Concerning Installation Location - - - - - - - - - - - - - - - - - - - - 2-4
2.3 Precautions When Moving the PLZ-U - - - - - - - - - - - - - - - - - - - - - - - - - 2-5
2.4 Installing Load Units - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6
2.5 Connecting the Power Cord - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-8
2.6 Power Up - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-9
2.7 Load Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-11
2.7.1 Precautions Concerning Wiring - - - - - - - - - - - - - - - - - - - - - - - 2-11
2.7.2 Connection to the Load Input Terminal on the Rear Panel - - - - - 2-15
2.7.3 Connection to the Load Input Terminal on the Front Panel - - - - 2-17
Chapter 3 Names and Functions of Parts 3-1
3.1 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3.1.1 Frame - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3.1.2 Load Unit (Channel) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-8
3.2 Rear Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-11
Chapter 4 Basic Operation 4-1
4.1 Panel Control Basics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2
4.2 Load On/Off - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-3
4.3 Basic Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6
4.4 Protection Functions and Alarms - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-9
4.4.1 Protection Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-9
4.4.2 Alarms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-10
4.4.3 Setting the Trip Points - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-12
Chapter 5 Application Operation 5-1
5.1 Soft Start - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
5.2 ABC Preset Memories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
5.3 Switching Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-5

PLZ-U Contents V
5.4 Setting the Slew Rate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-7
5.5 Elapsed Time Display and Auto Load Off Timer - - - - - - - - - - - - - - - - - 5-8
5.6 Sequence Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9
5.6.1 Editing the Sequence - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9
5.6.2 Executing the Sequence - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-11
5.6.3 Example Sequence - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-13
5.7 Remote Sensing Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-15
5.8 Key Lock Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-16
5.9 Configuration Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-17
5.10 External Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-21
5.10.1 FRAME CONT Connector - - - - - - - - - - - - - - - - - - - - - - - - - - 5-21
5.10.2 CH CONT Connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-25
5.11 Parallel Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-29
5.12 Setup Memories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-31
5.13 Factory Default Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-32
5.13.1 Factory Default Settings (General) - - - - - - - - - - - - - - - - - - - - - 5-33
5.13.2 Factory Default Settings of ABC Preset Memories - - - - - - - - - - 5-34
5.13.3 Factory Default Settings of Setup Memories - - - - - - - - - - - - - - 5-34
Chapter 6 Remote Control 6-1
6.1 Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6.2 Instrument Interface Standard - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6.3 Using SCPI Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-3
6.3.1 Hierarchy of SCPI Commands - - - - - - - - - - - - - - - - - - - - - - - - - 6-3
6.3.2 Parameter Format - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-6
6.4 Interface Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
6.4.1 GPIB Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
6.4.2 RS-232C Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-11
6.5 SCPI Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-13
6.5.1 IEEE 488.2 Common Commands - - - - - - - - - - - - - - - - - - - - - - 6-13
6.5.2 Channel Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-17
6.5.3 Measurement Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-18
6.5.4 Configuration and Operation Commands - - - - - - - - - - - - - - - - 6-19
6.5.5 Trigger Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-24
6.5.6 Switching Function Commands - - - - - - - - - - - - - - - - - - - - - - 6-26
6.5.7 Input State Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-27
6.6 Status Registers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-33
6.6.1 SCPI Registers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-33
6.6.2 IEEE488.2 Registers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-50
Chapter 7 Maintenance 7-1
7.1 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
7.1.1 Cleaning the Panels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
7.1.2 Cleaning the Dust Filter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
7.1.3 Inspecting the Power Cord - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-3

VI Contents PLZ-U
7.1.4 Internal Inspection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-3
7.2 Confirming status of the fuse - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-4
7.3 Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-4
7.4 Malfunctions and Causes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-5
Chapter 8 Specifications 8-1
8.1 Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2
8.2 Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-8
Appendix A-1
A.1 Operating Area of the PLZ-U - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-1
A.2 Basic Operation Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-2
A.2.1 Operation of the CC Mode - - - - - - - - - - - - - - - - - - - - - - - - - - A-2
A.2.2 Operation of the CR Mode - - - - - - - - - - - - - - - - - - - - - - - - - - -A-4
A.2.3 Operation of the CV Mode - - - - - - - - - - - - - - - - - - - - - - - - - - A-6
A.2.4 Operation of the CC+CV Mode - - - - - - - - - - - - - - - - - - - - - - - A-8
A.2.5 Operation of the CR+CV Mode - - - - - - - - - - - - - - - - - - - - - - -A-10
A.3 Operating Area of Each Model - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-13
A.3.1 Operating Area of the PLZ150U - - - - - - - - - - - - - - - - - - - - - - A-13
A.3.2 Operating Area of the PLZ70UA - - - - - - - - - - - - - - - - - - - - - -A-14
A.4 Sequence Program Creation Table ---------------------- A-15
A.5 SCPI Command Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-16
A.6 Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A-23
A.6.1 Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-23
A.6.2 A List of Errors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-23
Index I- 1

PLZ-U General Description 1-1
Chapter 1 General Description
This chapter gives an overview and describes the features of the PLZ-U.
1
1

1-2 General Description PLZ-U
1.1 About This Manual
This operation manual covers the following PLZ-U Series Electronic Load Units.
Product version covered
This operation manual covers products with frame ROM version 1.0X and load unit
ROM version 2.0X.
When contacting us about the product, please provide us the following information.
Model
ROM version
Manufacturing number (indicated at the lower section on the rear panel on the
frame and on the top panel on the load unit)
For the procedure of confirming the ROM version, see section 2.6, “Power Up.”
1.2 Product Overview
The PLZ-U Series Electronic Load Unit is a compact, high-performance, multi-
channel electronic load unit that has three operation modes: constant current, con-
stant resistance, and constant voltage.
The PLZ-U consists of a frame and load units. Load units are inserted into the frame
(control section) for operation. The PLZ-30F and PLZ-50F Frames can accommo-
date up to 3 channels and 5 channels of load units, respectively.
The current capacity or power capacity can be increased through a parallel opera-
tion of load units. The load units can be combined to produce a power capacity from
75 W to 750 W (when five PLZ150Us are installed into the PLZ-50F).
In addition to high-speed response and highly precise preset resolution, various
functions are provided including the soft start function, variable slew rates, switch-
ing function, ABC preset memories, four setup memories, and sequence function.
Because the PLZ-U comes standard with GPIB and RS-232C communication func-
tions, it can easily be incorporated into various test and inspection systems. The
communication functions are useful for testing batteries, DC/DC converters,
switching power supplies, and multi-output power supplies.
Frame
• PLZ-50F
• PLZ-30F
Load unit
• PLZ150U
• PLZ70UA

PLZ-U General Description 1-3
1.3 Features
In addition to the advanced constant current, constant resistance, and constant volt-
age functions, the PLZ-U Series Electronic Load Unit offers wide variety of other
features.
■Compact and light
Compact and light weighing only approximately 11 kg and 17 kg for 3 channels and
5 channels, respectively.
■High-speed response
In constant current mode, a current rise and fall slew rate of 2.4 A/μs (PLZ150U) is
possible (converts to a rise and fall time of 10 μs). Simulations that closely resemble
a real load are possible by using the PLZ-U as a load for DC power transient
response tests and as a dummy load
■High precision and high resolution
Three ranges are built into the PLZ-U achieving both wide dynamic range and high
resolution. The PLZ-U provides displays with up to 5 digits for voltage, current, and
power measurement functions as well as minimum preset resolutions of 10 μA
(PLZ70UA) and 20 μA (PLZ150U).
■Variable slew rate
The current slew rate can be varied continuously in constant current mode and con-
stant resistance mode. This feature allows the suppression of transient voltage drops
due to the wiring inductance that occurs when a load is switched and transient volt-
ages of constant voltage power supplies, etc.
■Multi channels
Up to five and three channels can be installed into the PLZ-50F and PLZ-30F, respec-
tively. Each channel is isolated and can be used independently or linked with each
other. Different units (PLZ150Us and PLZ70UAs) can be installed in the frame.
■Low noise
High reliability and low noise have been achieved by the adoption of a heat sensing
variable speed fan and the enhanced cooling structure.
■Large capacity
Parallel operation is possible on up to five adjacent load units of the same type.
Five PLZ70UAs installed in PLZ-50F operating in parallel produce 375 W.
Five PLZ150Us installed in PLZ-50F operating in parallel produce 750 W.
■0 V type
The PLZ70UA is a 0 V input operating voltage unit. This feature is a must for single
cell tests of fuel cells. Moreover, the operating voltage of semiconductor devices is
decreasing more and more due to the reduction of the power consumption and min-
iaturization of the semiconductor process. The PLZ70UA can be used to evaluate
the power supplies for these types of applications.

1-4 General Description PLZ-U
■ABC preset memories
Three presets that are most frequently used can be stored for each operation mode
and range. This allows quick switching of settings even when the load is turned on.
■Load simulations
In constant current and constant resistance modes, a sequence program can be cre-
ated with up to 255 steps at a minimum interval of 1 ms. Independent settings can
be entered on each channel simultaneously.
■Outstanding operability
Setup operations have been consolidated on the frame panel. Each channel can be
configured with one hand while viewing the measured voltage and current. Rotary
knobs with an analog feel and simple interface make the operation of the PLZ-U
easy even for first-time users.
■Load input terminal
The load input terminal is provided on both the front panel and rear panel making
the load unit suitable for embedded applications.
■Remote sensing terminal
Remote sensing terminals are provided on both the front panel and rear panel allow-
ing more accurate characteristics tests.
■Extensive protection functions
Equipped with overcurrent protection (OCP), overpower protection (OPP), over-
voltage protection (OVP), undervoltage protection (UVP), overheat protection
(OHP), and reverse connection protection (RVP) functions. Since OCP, OPP, and
UVP can be varied for each channel, protection can be optimized for each equip-
ment under test.
■External control
External voltage reference can be applied and the load can be turned on/off on each
channel. You can recall channel-linked ABC preset memories, recall setup memo-
ries, and turn on/off the load from the frame control connector.
■Inter-frame control
By connecting the frame control signal, multiple frames can be controlled from a
single frame. You can collectively turn on/off the load and recall reset values.
■Setup memories
Four sets of panel settings can be stored. You can easily recall settings according to
the application and perform tests.
■Standard GPIB, and RS-232C communication functions
GPIB and RS-232C come standard. Since panel settings, input voltage, current, and
power can be read through the interface, the PLZ-U can be embedded easily into
various test systems.

PLZ-U General Description 1-5
1.4 Options
Rack mounting option
The following rack mounting options are available.
For details, contact your Kikusui agent or distributor.
Table 1-1 Rack mounting options
Fig.1-1 Rack mount bracket (PLZ-50F)
Name Model Applicable Model Note
Rack mount bracket
(Fig. 1-1)
KRB3-PLZ-50F PLZ-50F Inch rack EIA standard
KRB150-PLZ-50F Milli rack JIS standard
Rack mount bracket
(Fig. 1-2)
KRB3-PLZ-30F PLZ-30F Inch rack EIA standard
KRB150-PLZ-30F Milli rack JIS standard
149
10024.5
484.4
465
KRB150-PLZ-50F
132 (5.20)
465 (18.31)
484.4 (19.07)
37.5 (1.48) 57 (2.24)
KRB3-PLZ-50F
Unit: mm (inch)
Unit: mm

1-6 General Description PLZ-U
Fig. 1-2 Rack mount bracket (PLZ-30F)
Control flat cables
Control cables that connect frames for inter-frame control. The following two types
of cables are available.
Model Cord Length Application
PC01-PLZ-4W 84540 300 mm Connection between frames
PC02-PLZ-4W 84550 550 mm
149
24.5 100
460
480
KRB150-PLZ-30F
132 (5.20)
37.5 (4.48) 57 (2.24)
482 (18.98)
465 (18.31)
KRB3-PLZ-30F
Unit: mm (inch)
Unit: mm

PLZ-U Installation and Preparation 2-1
Chapter 2 Installation and
Preparation
This chapter describes the procedures of unpacking and preparation before using
the PLZ-U.
2
2

2-2 Installation and Preparation PLZ-U
2.1 Checking the Package Contents
When you receive the product, check that all accessories indicated below are
included and that the accessories have not been damaged during transportation.
If any of the accessories are damaged or missing, contact your Kikusui agent or dis-
tributor.
• It is recommended that all packing materials be saved, in case the product needs
to be transported at a later date.
2.1.1 Frame
Fig.2-1 Accessories (frame)
NOTE
Power cord (1 pc.)
Blank panel (rear) Blank panel (front)
Operation manual (this manual, 1 pc.)
[P1-000-406] [P1-000-405]
FRAME CONT protection dummy plug (2 pcs.)
[Attached to the product.]
[Attached to the product.]* [Attached to the product.]*
[84-49-0071]
PLZ-30F (2 pcs. maximum)
PLZ-50F (4 pcs. maximum) PLZ-30F (2 pcs. maximum)
PLZ-50F (4 pcs. maximum)
* In products that have load units installed, blank panels are installed in the empty slots.
In products that contain the frame alone, the maximum number of blank panels are installed.
The power cord that is provided varies depending on the
destination for the product at the factory-shipment.
[85-AA-0003] [85-AA-0005]
Rating: 125 Vac/10 A
Plug: NEMA5-15
Rating: 250 Vac/10 A
Plug: CEE7/7
[85-10-0790]
Rateing: 250 Vac/10 A
Plug: GB1002
or or

PLZ-U Installation and Preparation 2-3
2.1.2 Load Unit
The following accessories are included with each load unit.
Fig. 2-2 Accessories (load unit)
Rear load input terminal cover Set of screws for the load input terminal
(2 pcs. each)
Rear sensing terminal screws (M3-6: 2 pcs.)
[M1-100-006]
[M5-101-006]
[M4-100-006]
[Q1-500-077]
[M3-112-012]
Load unit attachment screws (M3-10, 2 pcs.)
[Attached to the load unit.]
[M3-112-014]
[M3-112-026]
[Attached to the load unit.]

2-4 Installation and Preparation PLZ-U
2.2 Precautions Concerning Installation
Location
This section describes the precautions to be taken when installing the product. Make
sure to observe them.
■Do not use the PLZ-U in a flammable atmosphere.
To prevent the possibility of explosion or fire, do not use the PLZ-U near alcohol,
thinner or other combustible materials, or in an atmosphere containing such vapors.
■Avoid locations where the PLZ-U is exposed to high tempera-
ture or direct sunlight.
Do not place the PLZ-U near a heater or in areas subject to drastic temperature
changes.
Operating temperature range: 0 °C to +40 °C (32 °F to 104 °F)
Storage temperature range: –20 °C to +70 °C (-4 °F to 158 °F)
■Avoid humid environments.
Do not place the PLZ-U in high-humidity locations--near a boiler, humidifier, or
water supply.
Condensation may occur even within the operating humidity range. In such cases,
do not use the PLZ-U until the condensation dries up completely.
Operating humidity range: 20 % to 85 % RH (no condensation)
Storage humidity range: 0 to 90 % RH (no condensation)
■Do not place the PLZ-U in a corrosive atmosphere.
Do not install the PLZ-U in a corrosive atmosphere or in environments containing
sulfuric acid mist, etc. This may cause corrosion of various conductors and bad con-
tacts of connectors inside the PLZ-U leading to malfunction and failure, or in the
worst case, a fire.
■Do not place the PLZ-U in a dusty location.
Accumulation of dust can lead to electric shock or fire.
■Do not use the PLZ-U where ventilation is poor.
The PLZ-U employs a forced air cooling system. Air is taken in from air inlets
located on panels other than the rear panel and exhausted from the air outlet on the
rear panel. Secure adequate space around the PLZ-U to prevent the possibility of
fire caused by accumulation of heat. Allow at least 20 cm of space between the air
inlet/outlet and the wall (or obstacles).
Hot air (approximately 20 °C higher than the ambient temperature) is exhausted
from the air outlet. Do not place objects that are affected by heat near the air outlet.

PLZ-U Installation and Preparation 2-5
■Secure adequate space around the power switch.
Do not place the PLZ-U in a location that would result in poor accessibility to the
switch. And, do not place objects near the switch that would result in poor accessi-
bility.
■Do not place objects on the PLZ-U.
Placing objects on top of the PLZ-U can cause failures (especially heavy objects).
■Do not place the PLZ-U on an inclined surface or location sub-
ject to vibrations.
The PLZ-U may fall or tip over causing damages and injuries.
■Do not use the PLZ-U in a location where strong magnetic or
electric fields are nearby or a location where large amount of
distortion and noise is present on the input power supply
waveform.
The PLZ-U may malfunction.
■Do not use the PLZ-U near highly sensitive measuring instru-
ments or transceivers.
The noise generated by the PLZ-U may affect them
■Use the PLZ-U in an industrial environment.
The PLZ-U may cause interference if used in residential areas. Such use must be
avoided unless the user takes special measures to reduce electromagnetic emissions
to prevent interference to the reception of radio and television broadcasts.
2.3 Precautions When Moving the PLZ-U
When moving or transporting the PLZ-U to the installation site, observe the follow-
ing precautions.
■Turn off the POWER switch.
Moving the PLZ-U while the power is turned on can cause electric shock or damage
to it.
■Remove all wiring.
Moving the PLZ-U with the cables connected can cause wires to break or injuries
due to the PLZ-U falling over.

2-6 Installation and Preparation PLZ-U
2.4 Installing Load Units
Install the load units into the empty slots of the frame. Channel numbers are auto-
matically assigned to the load units. The left most load units is CH1.
• Turn off the POWER switch. Installing a load unit while the power is turned
on can cause electric shock or damage to the PLZ-U.
■Installation procedure
1. Remove the blank panels (front and rear panels) from the slot where
the load unit is to be installed.
Fig. 2-3 Removing the blank panels
WARNING
B
l
ank
p
ane
l
(rear
p
ane
l
)
Pinch the center section of the b
l
ank
p
ane
l.
Pu
ll
it off towards
y
ou
.
1
2
1
2
I
nsert a f
l
at-b
l
ade screwdriver or somethin
g
simi
l
ar into
the rectan
g
u
l
ar ho
l
e on the to
p
of the cover
.
B
l
ank
p
ane
l
(front
p
ane
l)
1
2
Pu
ll
the b
l
ank
p
ane
l
off towards
y
ou
.
1
2