Kikusui PBZ20-80 SR User manual

PART NO. Z1-005-860, IB026165
Jan. 2016
1.2 kW model
PBZ20-60 SR
PBZ40-30 SR
PBZ60-20.1 SR
PBZ80-15 SR
1.6 kW model
PBZ20-80 SR
PBZ40-40 SR
PBZ60-26.8 SR
PBZ80-20 SR
2 kW model
PBZ20-100 SR
PBZ40-50 SR
PBZ60-33.5 SR
PBZ80-25 SR
Setup Guide
Large-Capacity Bipolar Power Supply
Smart Rack System
PBZ-SR Series
Checking the Package Contents 3
Product Overview 3
Option 3
Part Names 5
Preparation 6
Connecting the Power Cable 6
Turning On 8
Turning Off 10
Connecting the Load 11
Connecting the Load Cable 11
Using Remote Sensing 15
Connecting External Devices 19
Connecting an External Controller 19
Connecting an Remote Controller 21
Connecting Devices to Synchronize 22
Connecting an External Signal Source 23
Using Current Monitor Output 23

KIKUSUI ELECTRONICS CORP.
1-1-3, Higashiyamata, Tsuzuki-ku,
Yokohama, 224-0023, Japan
TEL: [phone] Fax: [phone]
http://www.kikusui.co.jp/en
WEBSITE
The newest version of the PBZ-SR series manuals can be downloaded from
Download service of Kikusui website.
Thank you for purchasing the PBZ-SR Series Large-Capacity
Bipolar Power Supply.
There are PBZ-SR series Manuals listed as follows.
• Setup Guide (this manual)
This manual is intended for users who are using the PBZ-
SR Series for the first time. It includes covers topics related
to setting up the product such as installing the product,
wiring the power cables and load cables, and connecting
the connectors.
• Specifications
This document describes the specifications of the PBZ-SR
series.
• User's Manual of base model PBZ-SR series
This manual describes the base model PBZ-SR series. It
provides an overview of the base model and notes on
usage. It also gives various settings, operation procedures,
maintenance and so on.
Read first the setup guide to set up the PBZ-SR series, next
read the User's Manual to use the functions of the product
effectively.
• Quick Reference of base model PBZ-SR series
This manual explains Panel description and operation briefly.
• The communication interface manual
This manual contains details about remotely controlling the
tester using SCPI commands. The interface manual is
written for readers with sufficient basic knowledge of how to
control measuring instruments using a PC.
• Safety Information
This document contains general safety precautions for this
product. Keep them in mind and make sure to observe
them.
The PBZ-SR series Manuals are intended for users of the
product or persons teaching other users on how to operate the
product.
Explanations are given under the presumption that the reader
has knowledge about Power Supply.
PDF is provided on the included CD-ROM.
Adobe Reader 9.2 or later is required to view the PDF file.
If you find any incorrectly arranged or missing pages in the
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.
The PBZ-SR series Manuals has been prepared with the
utmost care; however, if you have any questions, or note any
errors or omissions, please contact Kikusui distributor/agent.
After reading, always keep the manual nearby so that you may
refer to it as needed.
Product firmware versions
This manual applies to products with firmware versions 2.2X.
When contacting us about the product, please provide us with:
The model (marked in the top section of the front panel)
The firmware version (see page 8)
The serial number (marked in the bottom section of the rear
panel)
About PBZ-SR Series Manuals
Paper
Paper
PDF
PDF
PDF
Pa
p
er
Pa
p
er
PDF
PDF
Pa
p
er
Pa
p
er
PDF

PBZ-SR 3
When you receive the product, check that all accessories 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 distributor.
We recommend that all packing materials be saved, in case
the product needs to be transported at a later date.
The PBZ-SR series is a large-capacity bipolar regulated DC
power supply. It is a large-current model consisting of PBZ
series bipolar power supplies that are mounted using
dedicated rack parts (smart rack).
• It supports four-quadrant output, which means that it can
source and sink both positive and negative voltages and
currents.
• The internal AC signal or an external signal can be superim-
posed on the DC output.
• You can use the sequence feature to generate test signals
for automotive and other electronic devices.
• Additionally, the PBZ-SR can be used with a variety of loads
to perform tests such as motor endurance tests, solenoid
operation tests, and capacitor ripple tests.
• You can control the PBZ-SR series externally using external
analog signals and control it remotely using RS232C, GPIB,
USB, and LAN communication features.
The PBZ-SR has the following options. For information about
options, contact your Kikusui agent or distributor.
• AC Input power cable (AC8-3P3M-M5C)
8sq Heavy PVC jacketed three-core cable 3 m
• Low Inductance Cable (TL02-PLZ, TL03-PLZ)
When you connect the cable to the output terminal block of
the PBZ-SR, be sure to provide grounding through the
terminal.
• Low Inductance Cable
(LIC40-2P1M-M6M6, LIC40-2P2M-M6M6)
When you connect the cable to the output terminal block of
the PBZ-SR, be sure to provide grounding through the
terminal.
When installing this product, be sure to observe the
precautions provided in “Precautions Concerning Installation
Location” in the Safety information manual. Items specific to
this product are given below.
• Avoid locations where the product is exposed to high tem-
perature or direct sunlight.
Do not install the product 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: -25
° C to +70 ° C (-13 ° F to +158 ° F)
• Avoid humid environments.
Do not install the product in high-humidity locations–near a
boiler, humidifier, or water supply.
Operating humidity range: 20 %rh to 85 %rh (no condensation)
Storage humidity range: 90 %rh or less (no condensation)
Condensation may occur even within the operating relative
humidity range. If this happens, do not use the product until
the condensation dries up completely.
• The PBZ-SR series does not allow individual PBZs to be
operated separately. Using them separately is outside the
scope of the warranty.
Checking the Package Contents
Setup guide
(This manual, 1 pc.)
CD-ROM (1 pc.)
Quick Reference
English:1 pc., Japanese:1 pc.
Pins (30 pcs.)
[84-49-0100]
Socket (1 pc.)
[84-49-0160]
Protection cover (2 sets)
[84-49-0161]
J1 connector kit (1 set)
Safety information (1 pc.)
If necessary, attach
to the product.
Heavy object warning
label (1 pc.)
[A8-900-158]
Product Overview
TL02-PLZ TL03-PLZ
Full length*1
*1. Between the insulation caps
1000 mm 2000 mm
Inductance value*2
*2. at 100 kHz
150 nH 200 nH
Maximum allowable
current 100 A
LIC40-2P1M-
M6M6
LIC40-2P2M-
M6M6
Full length*1
*1. Between the insulation caps
1000 mm 2000 mm
Inductance value*2
*2. at 100 kHz
150 nH 200 nH
Maximum allowable
current 50 A
Option
Precautions for Installation

4PBZ-SR
When fixing the power supply at the
installation location
This product has casters on its bottom side, so it is easy to
move the product. To ensure that the product is not moved
accidentally while it is being operated, use the stopper to fix
the product in place, and lock the casters.
When installing this product, be sure to observe the
precautions provided in “Precautions to Be Taken When
Moving the Product” in the Safety information manual. Items
specific to this product are given below.
• The rear, side and top panel may become hot during opera-
tion. If you touch it, you may burn yourself.
• If the power supply is fixed in place with the stopper, release
the stopper. Otherwise, it may cause injuries due to the
power supply falling over.
• When using a forklift to move the power supply, place the
fork underneath the power supply and confirm all safety
conditions before lifting. When lifting the power supply with
a crane using lifting bands, always apply the bands at the
equipment bottom and confirm all safety conditions before
lifting.
• Do not lift the power supply using the handles. The handles
are used to grab the power supply when moving power sup-
ply on the casters. The handles are not strong enough to
support the weight of the power supply.
• Do not lay the power supply with its side up or place the
power supply upside-down.
• The large-capacity bipolar power supplies smart rack sys-
tem PBZ20-60 SR, PBZ20-80 SR, PBZ20-100 SR, PBZ40-
30 SR, PBZ40-40 SR, PBZ40-50 SR, PBZ60-20.1 SR,
PBZ60-26.8 SR, PBZ60-33.5 SR, PBZ80-15 SR, PBZ80-20
SR, and PBZ80-25 SR are also referred to as the PBZ-SR
and PBZ-SR series respectively.
• The bipolar power supplies (the individual power supplies)
PBZ20-20, PBZ40-10, PBZ60-6.7 and PBZ80-5 are also
referred to as the PBZ series respectively.
• The following markings are used 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 reference to detailed information.
Insert the program CD-ROM in the drive. The menu program
window will appear momentarily. If the menu program window
does not appear, open the CD-ROM folder in Windows
Explorer, and then double-click index.htm to start the menu
program.
Accompanying CD-ROM contains following the items.
•IVI-COMDriver
• KI-VISA Driver
• PBZ-SR series Setup Guide (PDF)
• PBZ-SR series Specifications (PDF)
• PBZ series User’s Manual (PDF)
• PBZ series Quick Reference (PDF)
• PBZ series Communication interface manual (PDF))
• Safety Information (PDF)
Rock
Free
Caster lock
Stopper bolt's bottom nut (M12)
xTurn the nut clockwise to lower the stopper (lock).
xTurn the nut counterclockwise to raise the stopper (unlock)
.
Stopper bolt's top nut (M12)
xWhen the stopper bolt is locked, turn
the nut clockwise to fix the stopper
position in place.
Caster lock
Precautions for Moving
Notations Used in This Manual
WARNING
CAUTION
See
Contents of the Included CD-ROM

PBZ-SR 5
Front panel (example of PBZ20-100 SR)
Rear panel (example of PBZ20-100 SR)
Part Names
POWER switch
Caster
Caster lock
Stopper bolt
Slave unit
Model name
Master unit
Display
Handle
* The PBZ-SR series does not have the
OUTPUT terminals that are available on
the front panel of individual PBZ power
supplies.
EXT SIG IN
terminal
I MON terminal
*TheoutputterminalblockonthePBZ60-XXSR
seriesandPBZ80-XXSRseriesisfixedwith
screws.
Rear Panel
Output
terminal cover
(Cover opened)
(Cover opened)
Sensing terminals
AC input terminal cover
AC input terminals
Output terminals
Serial number

6PBZ-SR
1Preparation
This chapter describes how to connect the power cable and how to turn the power on and off.
Connecting the Power Cable
This product is designed as an equipment of IEC Overvoltage Category II (energy-consuming
equipment supplied from the fixed installation)
.
p. 3 A power cable is not supplied with the PBZ-SR series. Use the optional AC input power cable
(AC8-3P3M-M5C).
If you will not use the optional power cable, prepare an appropriate power cable with a
nominal cross-sectional area of at least AWG8 (8 mm2).
1Turn the POWER switch off ( ).
2Check that the AC power line complies with the input rating of the
product.
The voltage that can be applied is any of the nominal power supply voltages in the
range of 200 Vac to 240 Vac. The frequency is 50 Hz or 60 Hz (frequency range of
47 Hz to 63 Hz).
WARNING
• Be sure to have a qualified engineer connect the power cable to the distribution
board.
• Install the AC power cord such that the distance between the power supply and the
switch on the switchboard is within 3 m. This procedure facilitates operation of the
switch on the switchboard in the event of emergency.
If the distance to the switch on the switchboard is to be 3 m or more, install the AC
power cord with a separate switch provided within 3 m from the power supply. For
such a switch, use one with two poles that can be disconnected simultaneously.
Possible electric shock.
• This product is an IEC Safety Class I equipment (equipment with a protective
conductor terminal). Be sure to ground the product to prevent electric shock.
• Connect the ground terminal to earth ground.
See

PBZ-SR 7
Connecting the Power Cable
3Connect the power cable to the AC input terminal
The size of the terminal block screws is M5. Attach appropriate crimping terminals to
the power cable.
4Attach crimping terminals to the switchboard end of the power cable.
Use crimping terminals that conform to the switchboard's terminal
screws.
5Turn off the switchboard’s breaker.
6Connect the N, L, and (GND) wires of the power cable to the matching
terminals on the switchboard.
Be sure to connect the GND terminal of the AC INPUT terminal block to the GND
terminal of the switchboard.
LN
(GND)
Screw (M5)
Screw (M3)
The POWER switch can be used to disconnect the product from the AC power line in an
emergency. Provide enough space around the POWER switch to ensure that it can be
turned off at any time.

8PBZ-SR
Turning On
1Check that the power cable is correctly connected.
2Check that the POWER switches on the individual PBZ power supplies
are all turned on.
PBZ20-100 SR example
3Turn the POWER switch on.
The display shows the model and firmware version, and a self test starts.
When the self test finishes, if no errors
were detected, “PASS” is displayed. If an
error was detected, the error number is
displayed.
SELF TEST ...PASS (When the test passes)
SELF TEST ...E101 (When an error is detected)
(Display example)
• If you notice strange sounds, unusual odors, fire, or smoke around or from inside the PBZ-
SR, lower the POWER switch lever to turn the power off.
• When you turn the POWER switch on for the first time after purchase, the PBZ-SR starts
with its default values. For details on the default values, See "Initial Settings" on page 10 .
• If you want to turn on the POWER switch of the PBZ-SR first and then the POWER
switches of the individual PBZ power supplies, turn on the slave units first.
• The circuit breaker used in the POWER switch of the PBZ-SR is indicated below.
EW32AAG-2P032BX (72-08-2800) Rated current: 32 A
Rated current sensitivity: 30 mA
• If the display shows “ALARM,” an OVP (overvoltage protection), OCP (overcurrent
protection), or OHP (overheat protection) is activated. Remove the root cause of the alarm.
For details on the OVP, OCP and OHP, refer to the “Protection Features and Alarms” in
PBZ series User’s Manual.

PBZ-SR 9
Turning On
When the PBZ-SR Does Not Start Properly
If an error number is displayed after the self test
Follow the remedy that corresponds to the appropriate error number shown in the following
table. If following the remedy shown here does not solve the problem, contact your Kikusui
agent or distributor.
If “POWER OFF” is displayed
“POWER OFF” may be displayed on the screen while the PBZ-SR is running. If this occurs,
the input voltage is low, so the PBZ-SR can not function properly. Lower the POWER switch
lever to turn the power off, and then check the voltage of the input power supply.
Error
number
Message Cause and remedy
E101 CALIBRATION DATA An error was detected in the calibration values.
There is an error in the calibration values that are stored
in non-volatile memory. The PBZ-SR must be calibrated
properly. If this error number (E101) appears even after
you have calibrated the PBZ-SR, it may be
malfunctioning.
E102 EEPROM DATA An error was detected in the backup data.
There is an error in the backup data that is stored in
nonvolatile memory. You can clear this error by starting
the PBZ-SR with the factory default settings. For details,
see “List of Factory Default Settings” in PBZ series
User’s Manual.
E901 INTERNAL ERROR An error was detected in the internal system.
There is an execution error in the internal system.
Restart the PBZ-SR.
If you initialize the PBZ-SR to its factory default settings, you need to set the number of
parallel operation units and the remote sensing on/off setting again. See "Initial Settings" on
page 10, and set the number of parallel operation units installed in the PBZ-SR and the
remote sensing on/off setting.

10 PBZ-SR
Turning Off
Initial Settings
As shown in the following table, the initial settings of the PBZ-SR are different from the factory
default settings of individual PBZ power supplies. If you initialize the PBZ-SR to its factory
default settings, the factory default settings of individual PBZ power supplies will be applied,
so be sure to change the items in the following table.
For the factory default settings, see “List of Factory Default Settings” in the PBZ series User’s
Manual. For information on how to change the settings, see “Setting and Viewing Config
Settings” in the PBZ series User’s Manual.
Turning Off
Lower the POWER switch lever to turn the power off.
“POWER OFF” is shown on the display for a few seconds and disappears.
Model
Initial settings for the PBZ-SR series
The number of parallel operation units
(UNIT)
Remote sensing on/off
(SENSING)
PBZ 20-60 SR
PBZ 40-30 SR
PBZ 60-20.1 SR
PBZ 80-15 SR
3ON
PBZ20-80 SR
PBZ40-40 SR
PBZ60-26.8 SR
PBZ80-20 SR
4ON
PBZ20-100 SR
PBZ40-50 SR
PBZ60-33.5 SR
PBZ80-25 SR
5ON
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. Turning the PBZ-SR on too soon after you turn it off can
cause damage to the inrush current limiter circuit, as well as reduce the life of components
such as the POWER switch and the internal input fuses.
• The PBZ-SR series stores the panel settings (excluding output on/off condition)
immediately before the POWER switch is turned off. If you turn the power on, the PBZ-SR
starts in the same state as it was in the last time that it was turned off. If the POWER switch
is turned off immediately after changing the settings, the last settings may not be stored.
• If you want to turn off the POWER switches of the individual PBZ power supplies before the
POWER switch of the PBZ-SR, turn off the slave units first.

PBZ-SR 11
2Connecting the Load
This chapter describes how to connect a load to the PBZ-SR.
Connecting the Load Cable
Selecting the Load Cable
The load cables that you use must have a current capacity that allows the PBZ-SR’s rated
output current to flow. If you use load cables whose capacity meets or exceeds the rated
output current, even if the load is shorted, the cables will not be damaged. Use wires that
have diameters that correspond to the output current to connect to the load.
p. 3 You can also use the optional low inductance cable (TL02-PLZ, TL03-PLZ, LIC40-2P1M-
M6M6 or LIC40-2P2M-M6M6).
WARNING
To prevent the possibility of fire.
• Use a load cable with sufficient current capacity with respect to the rated output
current of the PBZ-SR series.
Possible electric shock.
• Use load cables whose rated voltage meets or exceeds the PBZ-SR’s isolation
voltage (500 Vdc).
Nominal cross-
sections area
(mm2)
AWG (reference
cross-section area;
mm2)
Allowable current*1
(A; Ta = 30 °C)
*1. Excerpt from Japanese laws related to electrical equipment.
Kikusui-recommended
current (A)
3.5 12 (3.31) 37 -
5.5 10 (5.26) 49 20
8 8 (8.37) 61 30
14 6 (13.3) 88 50
22 4 (21.15) 115 80
30 2 (33.62) 139 -
38 1 (42.41) 162 100
See
A cable’s temperature is determined by the resistive loss based on the current, the ambient
temperature, and the cable’s external thermal resistance. The above table shows the current
capacity of heat-resistant vinyl cables that have a maximum allowable temperature of 60 °C
when one of the cables is separated and stretched out horizontally in air in an ambient
temperature of 30 °C. The current capacity must be reduced under certain conditions, such
as when vinyl cables that have a low heat resistance are used, when the ambient
temperature is 30 °C or greater, or when cables are bundled together and little heat is
radiated.

12 PBZ-SR
Connecting the Load Cable
Connecting the Load Cable
Using load cables, connect the load to the PBZ-SR through the output terminals on the rear
panel.
1Lower the POWER switch lever of the PBZ-SR to turn the power off.
2On the rear panel, loosen the screws holding the output terminal cover
in place, and remove the cover.
PBZ20-100 SR example
3Connect the load cables to the OUTPUT terminals.
The size of the bolts used in the output terminal block is M8. Attach appropriate
crimping terminals to the load cable.
p. 3 If want to use the optional low inductance cable (TL02-PLZ, TL03-PLZ, LIC40-2P1M-
M6M6 or LIC40-2P2M-M6M6), be sure to connect the cable to ground using the short
bar, as shown in the figure above.
p. 15 To connect sensing cables, see “Using Remote Sensing.”
WARNING
Possible electric shock.
• Turn the POWER switch off before you touch the OUTPUT terminals.
• Be sure to attach the OUTPUT terminal cover after you connect the load cables to
the OUTPUT terminals.
Risk of burns.
• The rear panel may become hot. Before you touch the rear panel, turn the POWER
switch off, and allow a sufficient amount of time for the rear panel to become cool.
CAUTION
Risk of overheating.
• Attach crimping terminal to the wire and use the set of screws that came with the package
for connection.
Screw (M4)
Output terminal cover
Bolt (M8)
OUT
When using bolts
(PBZ20-100 SR example)
When using screws
(PBZ80-25 SR example)
Output
terminals
Crimping
terminals
Short bar
COM
Load Cable
Screw (M6)
See
See

PBZ-SR 13
Connecting the Load Cable
4Attach the output terminal cover.
PBZ20-100 SR example
5Adjust the output terminal cover to the appropriate position, and tighten
the screws.
Adjust the position so that the space between the cover and cables is small.
Influence of Cables
When you use the PBZ-SR, you must wire the load and configure the response setting
correctly and reduce the inductance. If these conditions are not met, the PBZ-SR may
oscillate or become unstable.
Load cables and inductance
Load cables have inductance L. If current I changes quickly, a large voltage is induced on
both ends of the cable. This voltage is applied to both the PBZ-SR and the load. The load
cable’s inductance L and voltage E that is induced according to the changes in current I
(hereafter referred to as the induced voltage) are expressed as follows:
Load
OUTPUT
Chassis
terminal
OUT
COM
PBZ-SR
LI'I/'T
E = L × ('I/'T)
E: The induced voltage
E
L: The wiring inductance
'I: The change in current
'T: The duration of time over
which the current changes
Generally, a cable’s inductance is 1 μH per meter of cable. If 2 meters of cable are used to
wire the load (the total length of the cables that are connected to the OUT terminal and the
COM terminal) and the current change is 10 A/μs, the induced voltage is 20 V.

14 PBZ-SR
Connecting the Load Cable
How to reduce the effect of wiring
p. 3 •You can reduce the inductance of load cables by using the optional low inductance
cables (TL02-PLZ, TL03-PLZ, LIC40-2P1M-M6M6 or LIC40-2P2M-M6M6).
•If fast transient response is not required, increase the response setting.
The value of I/T is reduced, so even if you can’t reduce the load cable’s inductance,
you can reduce the induced voltage. For details on the response setting, see “Response
Setting” in PBZ series User’s Manual.
•Use the shortest cables possible to wire the load, and twist them.
When Connecting Capacitive or Inductive Loads
Oscillation may occur when the PBZ-SR is connected to a capacitive load in CV mode or
when the PBZ-SR is connected to an inductive load in CC mode. To remedy this problem,
increase the response setting or use the soft start and soft stop features.
For details on each feature, see the following sections in the PBZ series User’s Manual.
• For CV mode and CC mode, see “CV/CC Mode.”
• For response settings, see “Response Setting.”
• For soft start and soft stop, see “The Output Soft Start and Soft Stop Features.”
When Connecting Battery Loads
If you connect a device to the OUTPUT terminals that can supply power, like a battery, the
PBZ-SR is a load to the device. In this situation, there is a limit to the amount of power that
the PBZ-SR can consume. When the PBZ-SR’s sink power becomes too large, it limits its
output current (the sink current to the PBZ-SR) so that the sink power reduces to a constant
value.
See
Model name Sink power*1
*1. The sink power values are typical values at an ambient temperature of 23 °C.
Bipolar mode Unipolar mode
PBZ20-60 300 W 1200 W
PBZ20-80 400 W 1 600 W
PBZ20-100 500 W 2000 W
PBZ40-30 540 W 1200 W
PBZ40-40 720 W 1600 W
PBZ40-50 900 W 2000 W
PBZ60-20.1 600 W 1206 W
PBZ60-26.8 800 W 1608 W
PBZ60-33.5 1000 W 2010 W
PBZ80-15 600 W 1200 W
PBZ80-20 800 W 1600 W
PBZ80-25 1000 W 2000 W

PBZ-SR 15
Using Remote Sensing
Remote sensing is a feature that is used to switch the voltage measurement point of CV/CC
mode and the voltage feedback point of CV mode.
When remote sensing is enabled, the voltage measurement point of CV/CC mode and the
voltage feedback point of CV mode are switched from the rear panel OUTPUT terminals to
the contact points of the sensing terminals. Connecting the sensing terminals to the load (1)
reduces the influence of the voltage drop caused by the resistive component of the load wires
and by the load current and (2) allows measurement and compensation of the output voltage
across the load. The compensation of the output voltage is effective to the voltage drop that is
1.8 V or less for a single line.
Remote sensing of CV mode has a protection feature. Even if the remote sensing wires are
connected in reverse, shorted, or disconnected, the output voltage in CV mode is limited
within the specified voltage ± approximately 3.6 V. When the connection is fixed, the
protection feature automatically recovers.
Connecting the Sensing Cables
To use remote sensing, connect sensing cables to the sensing terminals of the PBZ-SR.
WARNING
To avoid electric shock and damage to the PBZ-SR’s internal circuits, observe the
following precautions.
• Never wire the sensing terminals while the POWER switch is turned on.
• For sensing cables, use cables whose rated voltage is higher than the PBZ-SR’s
isolation voltage (500 Vdc).
WARNING
Risk of burns.
• The rear panel may become hot during operation. Before you touch the rear panel,
turn the POWER switch off, and allow a sufficient amount of time for the rear panel
to become cool.
CAUTION
• If the remote sensing cables come loose while remote sensing is in use, the PBZ-SR and
load may break. Be sure to connect the cables securely.
• If you are not using remote sensing, be sure to attach the two short bars to the sensing
terminals.

16 PBZ-SR
Using Remote Sensing
1Lower the POWER switch lever of the PBZ-SR to turn the power off.
2On the rear panel, loosen the screws holding the output terminal cover
in place, and remove the cover.
3Connect the sensing cables to the sensing terminals.
Remove the two short bars from the sensing terminals before connecting the cables.
short bars must be connected to the sensing terminals when remote sensing is not in
use. Store the short bars in a safe place.
Screw (M4)
Output terminal cover
Sensing cables
Connect the sensing cables.
Screw (M4)
Use AWG24 to AWG16 (0.2 mm2to 1.25 mm2) cables.
To avoid noise induction, use a two-wire shielded cable to connect the sensing
terminals. Connect the shield to the OUTPUT COM terminal. If you cannot use a
shielded cable, twist the sensing cables from the OUT terminal and the COM
terminal together.
Short bars
Remove the short bars that are
attached to the sensing terminals.

PBZ-SR 17
Using Remote Sensing
4Attach the OUTPUT terminal cover.
5Adjust the output terminal cover to the appropriate position, and tighten
the screws.
Adjust the position so that the space between the cover and cables is small.
6Connect the sensing cables to the load.
Connect by referring to the following information.
When remote sensing is enabled, if the sensing terminals are shorted, opened, or are
wired in reverse, the sensing protection is activated, and the output voltage in CV
mode is limited within the specified voltage ± approximately 3.6 V. When the
connection is fixed, the protection feature automatically recovers. Do not leave the
PBZ-SR while the sensing protection is activated.
Two-wire shielded cable
Load
OUTPUT
Chassis
tarminal
SENSING
OUT
COM
OUT
COM
Shield

18 PBZ-SR
Using Remote Sensing
If You Are Inserting a Mechanical Switch between the
OUTPUT Terminals and the Load
If you want to insert a mechanical switch between the OUTPUT terminals and the load, be
sure to include the sensing cables in the switch as shown in the figure below and turn on and
off the load and sensing cables simultaneously. Before you turn the mechanical switch on or
off, be sure to turn the output or the POWER switch off.
Load
OUTPUT
Chassis
terminal
SENSING
OUT
COM
OUT
COM
Switch

PBZ-SR 19
3Connecting External Devices
This chapter describes how to connect an external controller when you want to control the
PBZ-SR externally or remotely.
Connecting an External Controller
By applying control signals to the rear panel J1 connector, you can control the following
aspects of the PBZ-SR. The J1 connector also generates status signals that indicate the
PBZ-SR’s operating state.
• Controlling DC signals (the DC settings)
• Turning the OUTPUT terminal’s output on and off
• Shutting down the PBZ-SR
For details on external control and how to perform it, see “External Control” in the PBZ series
User’s Manual.
.
1Lower the POWER switch lever of the PBZ-SR to turn the power off.
2Remove the topmost rear panel.
You can now see the master unit rear panel.
3Remove the dummy plug that is attached to the J1 connector of the
master unit.
WARNING
Possible electric shock.
• Before removing the rear panel or connecting to the J1 connector, be sure to lower
the POWER switch lever of the PBZ-SR to turn the power off.
Risk of burns.
• The rear panel may become hot during operation. Before you touch the rear panel,
turn the POWER switch off, and allow a sufficient amount of time for the rear panel
to become cool.
Screw (M4)
J1 connector

20 PBZ-SR
Connecting an External Controller
4Connect a cable to the J1 connector of the master unit.
5Attach the rear panel that you removed in step 2 .
When you attach the rear panel, pass the cables that you wired to the J1 connector
through the open space on the left edge of the panel.
Wiring opening
(the opening on
the left edge of
the rear panel)