Kikusui PMX32-3TR User manual

PMX32-3DU
PMX32-3TR
PMX32-2QU
User’s Manual
Multiple-output Regulated
DC Power Supply
PMX Series (Multiple-output)
Contents 5
Component Names 8
Installation 13
Basic Functions 26
External Control 60
Parallel Operation and Series
Operation 67
Maintenance 77
Specifications 85
Appendix 96
PART NO. IB032411
Jul. 2018

2User’s Manual PMX_MULTI
These manuals provide an overview of the product and
notes on usage. They also explain how to configure it,
operate it, perform maintenance on it, and so on. Read
these manuals thoroughly before use, and use the product
properly.
Intended readers
These manuals are intended for users of this product and
their instructors. The manuals assume that the reader has
knowledge about power supplies.
Manual construction
• User’s manual (this manual)
This document is intended for first-time users of this
product. It provides an overview of the product, notes on
usage, and specifications. It also explains how to con-
nect the product, configure the product, operate the
product, perform maintenance on the product, and so
on.
• Communication Interface Manual (partially in PDF)
This document contains details about remote control.
The interface manual is written for readers with sufficient
basic knowledge of how to control power supplies using
a PC.
• Packing list
The packing list shows the included accessories.
• 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.
Microsoft Internet Explorer or Google Chrome 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 firmware version, see
“Turning the POWER switch on” (p.21).
When contacting us about the product, please provide us
with:
The model (marked in the top section of the front panel)
Firmware version (p.21)
The serial number (marked on the rear panel)
Trademarks
Microsoft is a registered trademark or trademark of Micro-
soft Corporation in the United States and/or other coun-
tries.
Other company names and product names used in this
manual are generally trademarks or registered trademarks
of the respective companies.
Copyright
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.
© Copyright 2018 Kikusui Electronics Corporation
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PMX_MULTI User’s Manual 3
The PMX series (multiple-output) is a compact multiple-
output DC power supply whose outputs are isolated from
each other.
There are three models (types): two-output model (DU),
three-output model (TR), and four-output model (QU).
Because the PMX series comes standard with RS232C,
USB, and LAN (LXI compatible) communication functions,
it can easily be incorporated into a wide range of inspec-
tion systems.
It is best suitable for use in research and development and
production lines.
PMX series (multiple-output) model con-
figurations
Features
In addition to basic constant current and constant voltage,
the PMX series (multiple-output) offers a variety of other
functions.
Each output isolated
Each output is isolated and safe.
High-resolution display
Display is possible with a high resolution at 1 mV or
1 mA, regardless of the output rating.
Output on/off for each channel
The output of each channel can be turned on or off, not
just all channels at once.
Switch between series connection and parallel con-
nection with a single key
CH1 and CH2 can be connected in series or parallel.
Tracking control
The output of each channel can be simultaneously
changed to the same width or ratio (%).
On/off delay of each output
You can set the delay (DELAY TIME) from when the
OUTPUT ALL key is turned on or off to when the output
actually turns on or off. This is useful when you want to
turn the output on or off by setting a delay according to
the load characteristics.
Memory
You can save up to three sets of output settings (the
combination of the voltage, current, OVP, OCP, on-
delay, and off-delay). You can simply select a memory
entry that you want to use rather than specifying the out-
put value every time.
Simultaneous display of all channel statuses
In addition to voltage or current, output on/off and other
statuses are displayed for each channel.
Sensing function
Remote sensing stabilizes the output voltage across the
load by reducing the influence of voltage drops and
other effects caused by the load cable resistance.
Color liquid crystal display (LCD)
Allows easy-to-see display in color. The display shows
the voltage, current, operation, and status.
Standard RS232C, USB, and LAN (LXI compatible)
communication functions
Simultaneous remote control is possible through the
three available interfaces.
This makes it easy to incorporate the product into vari-
ous inspection systems.
Model Output
terminal
Rated
Output
Voltage
Rated
Output
Current
Rated
Output
Power
PMX32-3DU
(2CH)
CH1 32V 3A 192W
CH2 32 V 3 A
PMX32-3TR
(3CH)
CH1 32V 3A 222W
CH2 32 V 3 A
CH3 6 V 5 A
PMX32-2QU
(4CH)
CH1 32V 2A 218W
CH2 32 V 2 A
CH3 18 V 2.5 A
CH4 18 V 2.5 A
Accessories
or or
With screws (2 pcs.)
[M8-600-024]
[Q1-500-214]
Rating: 125 Vac/10 A
Plug: NEMA5-15
Length: approx. 2.5 m
[85-AA-0004]
Rating: 250 Vac/10 A
Plug: CEE7/7
Length: approx. 2.5 m
[85-10-1070]
Rating: 250 Vac/10 A
Plug: GB1002
Length: approx. 2.5 m
[85-10-0791]
Power cord (1 pc.)
CD-ROM (1 disc) Packing list (1 copy)
Output terminal cover set (1 set)
Safety Information (1 copy)
The attached power cord varies depending on the
shipment destination.
Product Overview

4User’s Manual PMX_MULTI
• In this manual, the PMX32-3DU, PMX32-3TR, and
PMX32-2QU multiple-output regulated DC power sup-
plies are referred to as the PMX series (multiple-output)
or the PMX.
• The term “PC” is used to refer generally to both personal
computers and workstations.
• The screen captures and illustrations used in this text
may differ from the actual items.
• The following markings are used in this manual.
Indicates an imminently hazardous situation which, if
ignored, will result in death or serious injury.
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 slight injury or damage to the
product or other property.
Indicates information that you should know.
Indicates a reference manual (CD-ROM) containing
detailed information.
>
Indicates the hierarchy of items you need to select. The
item to the left of this symbol indicates a higher level
item.
CFxx: x
“CF” indicates that this is a CONFIG parameter. The two
digits after CF indicate the CONFIG parameter number.
The value after the colon indicates the selected setting.
SHIFT+key name
Indicates an operation that requires you to press a key
while holding down SHIFT.
When installing this product, be sure to observe the pre-
cautions provided in the Safety information manual. Items
specific to this product are given below.
• 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 “Pre-
cautions When Choosing the Installation Location” in the
Safety information manual. Items specific to this product
are given below.
• When installing this product, be sure to observe the tem-
perature and humidity ranges indicated below.
Operating temperature range: 0 °C to 40 °C
Operating humidity range: 20 %rh to 85 %rh (no con-
densation)
• When storing this product, be sure to observe the tem-
perature and humidity ranges indicated below.
Storage temperature range: -25 °C to 70 °C
Storage humidity range: 90 %rh or less (no condensa-
tion)
• 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
DANGER
WARNING
CAUTION
Safety Precautions
Precautions Concerning Installation Location

PMX_MULTI User’s Manual 5
Contents
About Manuals ...................................................2
Accessories ........................................................3
Product Overview ...............................................3
Notations Used in This Manual...........................4
Safety Precautions .............................................4
Precautions Concerning Installation Location ....4
Component Names ............................................8
Installation
Connecting the Power Cord .............................13
Load Considerations ........................................14
Selecting the Load Cables ...............................16
Output Terminal Insulation ...............................17
When the output terminal is not grounded (floating).
17
When the output terminal is grounded..................18
Connecting to the Output Terminals.................19
Checking Whether the Power Is On or Off .......21
Turning the POWER switch on.............................21
Turning off the POWER switch.............................22
Sensing Function..............................................23
Local sensing........................................................23
Remote sensing....................................................23
Basic Functions
Panel Display ...................................................26
Panel Operations..............................................28
Output Operation ..............................................29
Output on/ off setting at power-on ........................29
Output-on startup state parameter .......................29
output-on delay/ off delay .....................................30
CV Power Supply and CC Power Supply.........34
Using the PMX as a CV or CC Power Supply36
Protection Functions and Alarms......................37
Alarm occurrence and clearing alarms .................37
Setting and displaying the protection functions ....38
CONFIG Settings .............................................42
CONFIG parameter details...................................45
Memory Function..............................................52
Saving settings .....................................................52
Recalling settings .................................................53
Locking the Panel Controls (Key Lock) ............54
Tracking Function.............................................54
Remote Control ................................................59
External Control
CONTROL TERMINAL ....................................61
Connecting the CONTROL TERMINAL ............... 61
Pin arrangement of the CONTROL TERMINAL ... 62
Output On/Off Control ......................................63
Alarm Input .......................................................65
External monitoring of the operating status......66
Parallel Operation and
Series Operation
Overview of Parallel Operation ........................67
Parallel Operation Functions ................................ 67
Connections for parallel operation........................ 69
Configuration for parallel operation ...................... 70
Starting parallel operation .................................... 70
Overview of Series Operation ..........................72
Series Operation Functions.................................. 72
Connection for series operation ........................... 74
Configuration for series operation ........................ 75
Starting series operation ...................................... 75
Maintenance
Calibration Overview ............................................ 77
Connection ........................................................... 78
Calibration procedure ........................................... 79
Connection (series operation and parallel operation)
82
Calibration procedure (series operation and parallel
operation) ............................................................. 83

6User’s Manual PMX_MULTI
Specifications
AC input ................................................................85
Output ...................................................................86
Display function .....................................................88
Protection function ................................................89
Signal output .........................................................89
Control functions ...................................................90
Sensing .................................................................90
Parallel operation and series operation.................91
Other functions......................................................92
Interface ................................................................93
General specifications...........................................94
External dimensions ..............................................95
Appendix
Factory Default Settings .................................. 96
Options ............................................................ 97
Rack mounting options..........................................97
Troubleshooting............................................... 99
Index.............................................................. 103

PMX_MULTI User’s Manual 7
This page is intentionally blank.

8User’s Manual PMX_MULTI
Component Names
Front panel
PMX32-3TR
PMX32-3DU
9
8
7
4
3
2
Controls
2
Controls
CH1
Display
CH2
Display
CH1
Display
CH2
Display
CH3
Display
CH1
Output terminal area
CH2
Output terminal area
CH3
Output terminal area
CH1
Output terminal area
CH2
Output terminal area
5
1
1
6
9
8
7
4
3
5
6
POWER
FINE
FINE
TRACK DELAY
CBA ALM CLR DELAY SETTRACK SET PRLSER
OVP࣭ OCP SET LOCKCONFIG
SELECTOUTPUT SELECTOUTPUT SELECTOUTPUT CH3 SELECTOUTPUT CH4 OUTPUT
PMX32
-
3DU
0
-
32V 2A
CURRENT
VOLTAGE
LOCAL
SHIFT
MULTIPLE OUTPUT DC POWER SUPPLY
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
LOCK
REMOTE
LAN LAN
DEL AY
DEL AY SE T
SET OVP
࣭
OCP
PRESET AB C
ALARM
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PAR ASERI
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PAR ASERI
TRACK ING 12
%%%%
%%%%
AWG 20
-
28
STRIP
-
GAUGE
8mm
DC
OUTPUT
SER
PRL 0
-
32V 0
-
6A
0
-
64V 0
-
3A
0
-
32V 0
-
3A 0
-
32V 0
-
3A
SENSE 2
SENSE 1
OFF
ON
OFF
ON
-
S
+
S
-
S
+
S
SER
0
6
4
V
0
3A
POWER
FINE
FINE
TRACK DELAY
CBA ALM CLR DELAY SETTRACK SET PRLSER
OVP࣭ OCP SET LOCKCONFIG
SELECTOUTPUT CH1 SELECTOUTPUT CH2 SELECTOUTPUT CH3 SELECTOUTPUT CH4 OUTPUT
ALL
PMX32
-
3TR
0
-
32V 2A
CURRENT
VOLTAGE
LOCAL
SHIFT
MULTIPLE OUTPUT DC POWER SUPPLY
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
LOCK
REMOTE
LAN LAN
DEL AY
DEL AY SE T
SET OVP
࣭
OCP
PRESET AB C
ALARM
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PAR ASERI
TRACK ING 12
%%%%
%%%%
AWG 20
-
28
STRIP
-
GAUGE
8mm
DC
OUTPUT
SER
PRL 0
-
32V 0
-
6A
0
-
64V 0
-
3A
0
-
32V 0
-
3A
CH1
0
-
32V 0
-
3A
CH2 CH 3
0
-
6V 0
-
5A
SENSE 3
-
S
SENSE 2
SENSE 1
OFF
ON
OFF
ON
OFF
ON
+
S
-
S
+
S
-
S
+
S
SER
0
6
4
V
0
3A
CH1 CH2
ALL
CH1 CH 2

PMX_MULTI User’s Manual 9
No. Name Function See
1 Status display area ALARM: Appears in red when a protection function is activated.
SET: Appears when setting or viewing the output voltage or output current.
OVP•OCP: Appears when the overvoltage protection (OVP) or overcurrent pro-
tection (OCP) trip point is being set.
DELAY: Appears when output-on delay/ off delay is in progress. Blinks when
delay is in progress.
DELAY SET: Appears when output-on delay/ off delay is being set.
PRESET A/ B/ C: Appears when memory A, B, or C is being recalled or saved.
LOCK: Appears when the key lock is enabled.
REMOTE: Appears when the product is being controlled remotely.
LAN (green): Appears in the no fault state. Blinks in the identify state.
LAN (red): Appears in the fault state. Blinks in the standby state.
—
2 OUTPUT ALL key Turns the output on or off on all channels simultaneously. Starts the output-on
delay/ off delay.
p.29
3 Short bar Connects the output terminal to the chassis terminal. —
4 Air inlet Inlet holes for cooling. —
5 VOLTAGE knob Used to set the voltage value or change the value of a CONFIG parameter. p.28
FINE Used to make fine voltage value adjustments. p.28
6 CURRENT knob Used to set the current value or change the value of a CONFIG parameter. p.28
FINE Used to make fine current value adjustments. p.28
7 POWER switch Press the ( ) side to switch the power on, and the ( ) side to switch the power off. p.21
8 Feet Four casters attached to the bottom of the product. p.98
9 Handle Handle for carrying the product. p.98
PMX32-2QU 9
8
7
4
3
5
1
6
CH1
Display
CH2
Display
CH3
Display
CH4
Display
CH1
Output terminal
area
CH2
Output terminal
area
CH3
Output terminal
area
CH4
Output terminal
area
2
Controls
POWER
TRACK DELAY
CBA ALM CLR DELAY SETTRACK SET PRLSER
OVP࣭ OCP SET LOCKCONFIG
SELECTOUTPUT CH1 SELECTOUTPUT CH2 SELECTOUTPUT CH3 SELECTOUTPUT CH4 OUTPUT
ALL
PMX32
-
2QU
0
-
32V 2A
MULTIPLE OUTPUT DC POWER SUPPLY
CURRENT
FINE
FINE
VOLTAGE
LOCAL
SHIFT
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
LOCK
REMOTE
LAN LAN
DEL AY
DEL AY SE T
SET OVP
࣭
OCP
PRESET AB C
ALARM
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
CV
V
s
OFF
CC
A
s
ON
PRLSER
TRACK ING 12
%%%%
%%%%
0
-
32V 0
-
2A
CH1
0
-
32V 0
-
2A
CH2 CH 3
0
-
18V 0
-
2.5A
CH4
0
-
18V 0
-
2.5A
SENSE 3
-
S
AWG 20
-
28
STRIP
-
GAUGE
8mm
SER
PRL
DC
OUTPUT
0
-
32V 0
-
4A
0
-
64V 0
-
2A
SENSE 2
SENSE 1 SENSE 4
OFF
ON
OFF
ON
OFF
ON
OFF
ON
+
S
-
S
+
S
-
S
+
S
-
S
+
S
F
F
F
E
F
SER
0
6
4
V
0
2A

10 User’s Manual PMX_MULTI
CH1/CH2/CH3/CH4 display area
No. Name Function See
1 Voltmeter Displays the voltage, CONFIG parameter number, alarm, output-on delay time, or
the amount of voltage change of tracking function 2.
p.26
2 Ammeter Displays the current, CONFIG parameter value, cause of alarms, output-off delay
time, or the amount of current change of tracking function 2.
p.26
3 Output display OFF: appears when output is off, ON: appears when output is on (green) p.29
4 OUTPUT key Turns on or off the output of each channel. p.29
5 CV Appears in constant voltage mode. p.36
6 CC Appears in constant current mode. p.36
7 Status indicators SER: Appears during series operation.
PRL: Appears during parallel operation.
—
TRACKING12: Appears when tracking function 1 or tracking function 2 is in use. p.54
8 SELECT key Selects the channel. —
9 Selection display Appears when selected with the SELECT key. —
SELECTOUTPUT CHX SELECTOUTPUT CHX
CV
V
s
OFF
CC
A
s
ON PRLSER
TRACKING 12
%
%
CV
V
s
OFF
CC
A
s
ON PRLSER
TRACKING 12
%
%
1
2
3
4
5
6
7
8
9

PMX_MULTI User’s Manual 11
Control area and output terminal area
No. Name Function See
1 SER key Turns on or off parallel operation. p.75
2 PRL key Turns on or off series operation. p.70
3 TRACK key Turns on or off the tracking function. p.54
TRACK SET key Switches between tracking function 1 and tracking function 2. p.54
4 DELAY key Turns on or off the delay function. p.33
DELAY SET key Used to set or display the output-on delay/ off delay time. p.32
5 SET key Used to set or display the output voltage or output current. p.26
ALARM CLR key Releases the activated state (alarm) of protection functions. p.37
6 OVP•OCP key Used to set or display the overvoltage protection (OVP) or overcurrent protection
(OCP) trip point.
p.38
A Recalls or saves memory A values. p.52
7 CONFIG key Used to configure various operating conditions (CONFIG). p.42
B Recalls or saves memory B values. p.52
8 LOCK key Turns on or off the key lock. p.54
C Recalls or saves memory C values. p.52
9 LOCAL key Switches between local mode and remote mode. p.59
SHIFT key Used to enable the functions that are written in blue characters below the key. —
10 SENSE switch Used to turn remote sensing on and off. p.23
11 Sensing terminal Terminals to connect the sensing cables to. p.24
12 DC OUTPUT− Negative output terminal p.19
13 Chassis terminal A connector for grounding the output. —
14 DC OUTPUT+ Positive output terminal p.19
TRACK DELAY
CBA ALM CLR DELAY SETTRACK SET PRLSER
OVP࣭ OCP SET LOCKCONFIG LOCAL
SHIFT
0
-
32V 0
-
2A
CH1
0
-
32V 0
-
2A
CH2 CH3
0
-
18V 0
-
2.5A
CH4
0
-
18V 0
-
2.5A
SENSE 3
-
S
A
S
SER
PRL O
0
-
32V 0
-
4A
0
-
64V 0
-
2A
SENSE 2
SENSE 1 SENSE 4
OFF
ON
OFF
ON
OFF
ON
OFF
ON
+
S
-
S
+
S
-
S
+
S
-
S
+
S
F
F
F
E
F
SER
0
6
4
V
0
2A
1234 5 678 9
10 11 12 1413
11 10 1012 1413 1112 141310 11 12 1413

12 User’s Manual PMX_MULTI
Rear Panel
No. Name Function See
1 AC INPUT AC inlet p.13
2S1 switch*1
*1. Kikusui service engineers use this switch only during maintenance and servicing. Normally, the switch is on the
side of ●.
Maintenance switch. —
3 USB port USB port for remote control.
Interface
manual
4 RS232C port RS232C port for remote control.
5 LAN port LAN port for remote control.
6 CONTROL TERMINAL External control terminal block. p.61
50
-
60Hz
AC INPUT
KIKUSUI ELECTRONICS CORP. MADE IN CHINA
LINE
VOLTAGE
100V
117V
200V
217V
234V
SETTING
SUPPLY
RS232C USBLAN
S1
17813
CONTROL TERMINAL
1. CH1 OUT ON STATUS 2. CH2 OUT ON STATUS 3. CH3 OUT ON STATUS (TR QU)
4. CH4 OUT ON STATUS (QU)
8. CH1 OUT ON
/
OFF CONTROL
9. CH2 OUT ON
/
OFF CONTROL
10. CH3 OUT ON
/
OFF CONTROL (TR QU)
11. CH4 OUT ON
/
OFF CONTROL (QU)
AWG 20
-
28
STRIP GAUGE
8mm
15
6
4
2
3

PMX_MULTI User’s Manual 13
Installation
Connecting the Power Cord
This product is designed as an equipment of IEC Overvoltage Category II (energy-consuming equipment
supplied from a fixed installation).
Protective conductor current (at 257.4 Vac, 60 Hz) : Approx. 1 mA.
1Check that the AC power line meets the nominal input rating of the product.
The product can receive a nominal power supply voltage of 100 Vac, 117 Vac, 200 Vac, 217 Vac,
or 234 Vac at a frequency of 50 Hz or 60 Hz.
The supply voltage is set before factory shipment by a Kikusui ser-
vice engineer. A mark is indicated to the left of the appropriate volt-
age.
Be sure to check the nominal input rating before connecting the
power cord.
Example of 217 Vac supply voltage
2Turn the POWER switch off ( ).
3Connect the power cord to the AC INPUT inlet on the rear panel.
4Connect the power cord plug to an outlet with a ground terminal.
This completes the connections.
WARNING Risk of electric shock.
• This product is IEC Safety Class I equipment (equipment with a protective conduc-
tor terminal). To prevent electric shock, be sure to connect the protective conductor
terminal of the product to electrical ground (safety ground).
• The product isp 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 product from the AC power line
in an emergency.
• Secure adequate space around the power plug. Do not insert the power plug to an outlet
where accessibility to the plug is poor. And, do not place objects near the outlet that would
result in poor accessibility to the plug.
• Do not use the supplied power cord with other instruments.
50
-
60Hz
LINE
VOLTAGE
100V
117V
200V
217V
234V
SETTING
SUPPLY

14 User’s Manual PMX_MULTI
Installation
Load Considerations
Note that the output will become unstable if the following types of loads are connected.
Loads with peak current or pulse-shaped current
The product only indicates mean values. Even when the indicated value is less than or equal to the set
constant current, the peak values may exceed the set constant current. If this happens, the product is
instantaneously put into constant-current mode, and the output voltage drops.
For these types of loads, you must increase the set constant current or increase the current capacity.
Loads that generate reverse current to the power supply
The product cannot absorb reverse current from the load. Therefore, if a regenerative load (such as an
inverter, converter, or transformer) is connected, the output voltage increases and becomes unstable. This
can cause a malfunction.
For these types of loads, connect a resistor (RD) as shown in the following figure to bypass the reverse
current. However, the amount of current to the load decreases by Irp.
Load current with peaks Pulse-shaped load current
Constant current setting
Ammeter reading (mean value)
Constant current setting
Ammeter reading (mean value)
I
O
RD
EO
Equivalent circuit of the product Regenerative load
Load

+
0
Reverse current
Output current
waveform
-IO
+IO
Irp
RD>ȍ@  EO>9@
I
rp[A]
RD: Reverse current bypass dummy load
EO: Output voltage
Irp: Maximum reverse current
CAUTION
Use a resistor with sufficient rated power for RD. If a resistor with insufficient rated power for
the circuit is used, resistor RD will burn out.

PMX_MULTI User’s Manual 15
Installation | Load Considerations
Loads with accumulated energy
Connecting a load with accumulated energy, such as a battery, to the product may cause current to flow
from the load to the internal circuit of the product. This current may damage the product or reduce the life
of the load.
For this type of load, connect a reverse-current-prevention diode (DRP) between the product and the load
in series as shown in the following figure.
This cannot be used in conjunction with remote sensing.
Sink current from an external voltage source
The current varies depending on the voltage of the external voltage source.
The sink current is reduced at a low output terminal voltage. Hardly any sink current flows near 0 V.
The sink current indicated here is the value obtained when an external voltage with the same value as the
rated voltage is connected.
Sink current (TYP)
PMX
Load with accumulated energy
DRP: Reverse-current-protection diode
D
RP
CAUTION
• To protect the load and the product, use a DRP that conforms to the following specifica-
tions.
Reverse voltage withstand capacity: At least twice the rated output voltage of the
product.
Forward current capacity: 3 to 10 times the rated output current of the product.
A diode with small loss.
• Be sure to take into account the heat generated by DRP. DRP will burn out with inadequate
heat dissipation.
Model CH1 CH2 CH3 CH4
PMX32-3DU 43 mA 43 mA − −
PMX32-3TR 43mA 43mA 27mA −
PMX32-2QU 43mA 43mA 36mA 36mA

16 User’s Manual PMX_MULTI
Installation
Selecting the Load Cables
Current capacity of load cables
A wire’s temperature is determined by the resistive loss based on the current, the ambient temperature,
and the wire’s external thermal resistance. The following table shows the current capacity of heat-resistant
vinyl wires that have a maximum allowable temperature of 60 °C when one of the wires is separated and
stretched out horizontally in air in an ambient temperature of 30 °C. The current must be reduced under
certain conditions, such as when vinyl wires that have a low heat resistance are used, when the ambient
temperature is 30 °C or greater, or when wires are bundled together and little heat is radiated.
Taking measures against noise
When connecting wires that have the same heat resistance, separating the wires as much as possible to
increase heat radiation enables a greater amount of current to flow. However, wiring the + (positive) and -
(negative) output wires of the load cable side by side or bundling them together is more effective against
unwanted noise. The Kikusui-recommended currents shown in the above table are allowable currents that
have been reduced in consideration of the potential bundling of load cables. Use these values as a guide-
line when connecting load cables.
Limitations of the remote sensing function
All wires have resistance. As the wire becomes longer or the current becomes larger, the voltage drop in
the wire becomes greater. This results in a smaller voltage being applied at the load end. This product has
a sensing function that compensates for this voltage drop up to approximately 0.6 V for a single line (p.23).
If the voltage drop exceeds this level, use wires that have a greater cross-sectional area.
WARNING
Risk of fire.
• Use load cables whose capacity is adequate for the product’s rated output current.
• The output connector and its surrounding area become hot. Use cables whose cov-
ers have heat resistance at 85 °C and higher.
Risk of electric shock.
• Use load cables with a voltage rating that meets or exceeds the product’s isolation
voltage. For details on the product’s isolation voltage, see 「Specifications」 (p.85).
CAUTION
• Use load cables with a core diameter that is appropriate for the amount of current being
used and with sturdy, flame-resistant insulation.
Nominal cross-sec-
tional area (mm2)
AWG (reference cross-sec-
tional area; mm2)
Allowable current*1 (A)
(Ta = 30°C)
*1. * Excerpt from Japanese laws related to electrical equipment.
Kikusui-recom-
mended current (A)
0.9 18 (0.82) 17 4
1.25 16 (1.31) 19 6
2 14 (2.08) 27 10
3.5 12 (3.31) 37 -
5.5 10 (5.26) 49 20

PMX_MULTI User’s Manual 17
Installation
Output Terminal Insulation
The cable and load that are connected to the output terminal (including the sensing terminal) must have an
insulation capacity that is greater than or equal to the isolation voltage of the PMX seres (multiple-output)
with respect to the chassis. Isolation voltage indicates the maximum allowed voltage that appears across
the output terminal of the power supply unit and the protective conductor terminal (chassis terminal).
When the output terminal is not grounded (floating)
The output terminal of the PMX seres (multiple-output) is isolated from the protective conductor terminal. If
you connect the GND wire of the power cord to the ground terminal of the switchboard, the chassis of the
product is set to ground potential.
Pins 1 to 7 of the CONTROL TERMINAL on the rear panel are isolated from the chassis terminal and out-
put terminal of this product. Cables and devices that are connected to these pins must have an insulation
capacity greater than or equal to the isolation voltage of the PMX seres (multiple-output).
WARNING Risk of electric shock. For safety reasons, even if the output terminal is grounded,
make sure that the insulation capacity of the output terminal (including the sensing
terminal) is greater than or equal to the isolation voltage of this product.
For details on the isolation voltage of each model, see 「Specifications」 (p.85).
If you cannot obtain a cable with sufficient rated voltage, secure adequate withstand
voltage by passing the cable through an insulation tube with a withstand voltage
greater than the isolation voltage of the PMX seres (multiple-output).
+
–
+
+S
–S
–
+
–
10
11
12
13
6
7
5
4
3
2
1
8
9
AC
INPUT
DC
OUTPUT
J1
SENS
L
N
Isolated from the chassis
terminal and output
terminal
Chassis electric potential
Load
PMX
Vext

18 User’s Manual PMX_MULTI
Installation | Output Terminal Insulation
When the output terminal is grounded
If the positive output terminal is connected to the chassis terminal, the positive output terminal is at ground
potential. The cable and load that are connected to the output terminal (including the sensing terminal) will
only require an insulation capacity that is greater than or equal to the maximum output voltage of the PMX
seres (multiple-output) with respect to the chassis.
The same holds true when the negative terminal is connected to the chassis terminal. The cable and load
require an insulation capacity that is greater than or equal to the maximum output voltage of the PMX
seres (multiple-output).
For safety reasons, connect one of the output terminals to the chassis terminal unless your application
requires the output terminals to be floating.
+
–
+
+S
–S
–
+
–
10
11
12
13
6
7
5
4
3
2
1
8
9
AC
INPUT
DC
OUTPUT
J1
SENS
L
N
Isolated from the chassis
terminal and output
terminal
Chassis electric potential
Load
PMX
Vext
Short bar

PMX_MULTI User’s Manual 19
Installation
Connecting to the Output Terminals
When using the sensing function, connect the sensing cables before connecting the load cables to the out-
put terminals.
1Turn the POWER switch off.
2Attach crimping terminals to the load cables.
3Remove the knobs once, and attach the load cables to the output terminals.
Connect the short bar to the negative or positive output terminal.
If you are not grounding the output terminal (leaving it floating), follow the instructions in see “When
the output terminal is not grounded (floating)” on page 17 before use.
To reduce the influence of noise on the output, keep the cables as short as possible. If possible,
twist the positive and negative load cables.
4To attach the output terminal cover, remove the chassis terminal screws on the out-
sides.
WARNING Risk of electric shock.
• Turn the POWER switch off before you touch the output terminals.
• Regardless of whether load cables are connected to the output terminals, be sure to
attach the output terminal cover before turning the POWER switch on.
M6
Crimping terminal
Output terminal knob
Example of PMX32-2QU
To attach the output terminal cover,
remove these screws.
Example of PMX32-2QU

20 User’s Manual PMX_MULTI
Installation | Connecting to the Output Terminals
5Attach the output terminal cover.
Attach the output terminal cover using the screws included with the output terminal cover.
This completes the connections.
Output terminal cover
Output terminal cover screw
Example of PMX32-2QU