Electronic Load
P L Z - 4 W S E R I E S
Multifunctional Electronic Load
PLZ-4W Series
Four different power ratings - 165 W, 330 W, 660 W, and 1000 W - ve models in total
Support of 0-V input (PLZ164WA and PLZ664WA)
High-speed response supporting a maximum slew rate of 16 A/µs (equivalent to 10 µs when converted to a rise time)
Support of constant current, constant resistance, constant voltage, constant power, constant current + constant voltage, and
constant resistance + constant voltage modes
Timer functions combined with time/voltage measurement functions enable battery discharge characteristic evaluations.
Booster units provide increased system capacity (PLZ1004W).
Features sequence and switching functions.
Provided with GPIB, RS-232C, and USB 2.0 ports as standard.
Effective
measurement of
highly efcient
switching power
CP pulse
discharge for
digital camera
batteries
Actual
load sequences
supplies
Evaluation
of low-voltage,
for mobile
phone charging
circuits
Perfect for a wide range
of testing applications
high-current
DC/DC converters
for servers
P L Z - 4 W S E R I E S
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Evaluation
of AC
adapters
Evaluation of
fuel cells
and stacks
Performance
evaluation of DC/DC
converters
for PDA
terminals
For testing switching power supplies, batteries, DC/DC converters, and fuel cells!
Multifunctional DC Electronic Load
PLZ-4W Series
Designed to satisfy demands
for lower-voltage, higher-speed, and
larger-capacity testing applications
Support of
Minimum
setting
resolution of
10 µA
(for PLZ164/164WA L range)
0-V input
(PLZ164WA and PLZ664WA)
Support of
up to 9 kW/
1800 A
(System congured with
PLZ1004W and PLZ2004WB)
High-speed
operation at
10 µs
(when converted to rise
and fall times)
The current trend in semiconductors is towards lower voltages and higher speeds. This trend places similar
demands not only on the components of semiconductor power units, such as switching power supplies, batteries,
and DC/DC converters, but also on the electronic loads used for testing. Research and development in the eld of
fuel cells, which are expected to become an eco-friendly source of energy, demands electronic loads that allow a
current to ow even at 0 V, as well as load systems with expandable capacity for testing stacks of cells. The
PLZ-4W Series of electronic loads has been developed to satisfy all these demands.
The PLZ-4W Series offers high-performance DC electronic loads capable of operating in six modes: constant
current, constant resistance, constant voltage, constant power, constant current + constant voltage, and constant
resistance + constant voltage.
In addition to offering high-speed response at a maximum slew rate of 16 A/µs*1 and a minimum setting resolution
of 10 µA*2, the system features a variety of functions including soft start, variable slew rate, a switching function,
an ABC preset memory function, 100 setup memories, and a sequence function. What’s more, timer functions
combined with time/voltage measurement functions allow you to measure battery discharge characteristics.
Also provided is a master/slave parallel operation capability*3 that makes it possible to expand the current and
power capacities according to the output of the device under test. The PLZ1004W can handle up to 9 kW and
1800 A through the use of dedicated booster units (PLZ2004WB).
For communication, the system is provided with GPIB, RS-232C, and USB 2.0 interfaces as standard. Each of
these interfaces supports IEEE 488.2 as well as the Standard Commands for Programmable Instruments (SCPI),
developed for testing and measuring instruments.
GPIB,
RS-232C, and
USB 2.0 ports
provided as
standard
*1: PLZ1004W *2: For the PLZ164/164WA L range *3: Up to ve units of the same model (one master + four slaves)
P L Z - 4 W S E R I E S
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Merit of Ease of Use
Front and Rear Panels
Operation setting keys
These keys are us ed to se t the
basic value (current, conductance,
vo l ta g e, or p owe r ), op era t ion
mode, range, slew rate, protection
function, etc.
Speed-sensitive rotary knob
This rotar y knob is used to set various values. You can switch
between the coarse adjustment mode and ne adjustment mode
by pressing the rotary knob. In ne adjustment (FINE) mode,
the value changes at one-tenth of the rate applied in coarse
adjustment mode. Rotating the rotar y knob while holding down
the SHIFT key changes the contrast of the display.
LOCAL/LOCK key
his key is used to switch to the local operation mode
in which you can perform operations from the panels
of the system, when the system is in remote control.
Pressing this key while holding down the SHIFT key
places the system in a lock state.
Memory/
sequence
operation keys
These keys are used to
perform setup memory
and ABC preset memory
s e t ti ng o p er at io ns ,
se qu en ce editi ng and
execution, etc.
POWER switch
DC INPUT (front-panel
load input terminal)
This terminal allows easy connection of
th i s sy st e m wit h the dev ic e t o be
tested. The rear panel also has a load
input terminal, which is connected to
the one on the front panel in parallel.
EXT CONT
These variable resistors are used to
adjust the full scale and offset values
set for this system, in response to the
values input from an external control
source (voltage or resistance).
GPIB
connector
LOAD
key
I MON OUT terminal
This output ter minal is use d
f o r c ur r en t m o ni to r in g .
C o n ne ct a vo lt me t e r o r
oscilloscope to this terminal to
conduct current monitoring.
J1/J2 connectors
The se co nnect ors are used for th e input and
output of the signals intended to exert exter nal
control over this system using an external voltage,
resistance, relay contact, etc. J1 is for external
control, and J2 is for parallel operation.
Switching operation keys
The se key s ar e us e d t o se t th e
switching frequency, duty factor, time,
level, and other values related to the
switching operation.
DC INPUT
(rear-panel load input terminal)
This terminal is used to connect this system with
the device to be tested. It is connected to the load
input terminal on the front panel in parallel.
PLZ664WA/PLZ1004W
TRIG OUT terminal
Thi s t e r m i nal i s us e d t o
output pulse signals dur ing
the se quence or switc hing
operation.
Remote sensing
terminal
Cooling fan
The use of a heat-sensitive,
variable-speed fan and the
pursuit of a more efcient
co olin g st ruct u r e h ave
resulted in high reliability
and low noise.
RS-232C
connector
USB connector
P L Z - 4 W S E R I E S
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PLZ2004WB
AC INPUT connector
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