GW Instek SPS-1230, SPS-1820, SPS-3610, SPS-2415, SPS-606 USER MANUAL

Multi-Range DC Power Supply

PSW Series

USER MANUAL

GW INSTEK PART NO. 82SW-80400M01

ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyright. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will company.

The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves the
rights to change specification, equipment, and maintenance
procedures at any time without notice.

Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan.

SAFETY INSTRUCTIONS

Table of Contents

SAFETY INSTRUCTIONS ................................................... 5

GETTING STARTED ........................................................... 9

PSW Series Overview ........................... 10

Appearance .......................................... 14

Theory of Operation ............................. 20

OPERATION .................................................................... 31

Set Up .................................................. 33

Basic Operation ................................... 43

Parallel / Series Operation ................... 54

Test Scripts .......................................... 66

CONFIGURATION ........................................................... 74

Configuration ....................................... 75

ANALOG CONTROL ........................................................ 88

Analog Remote Control Overview ......... 89

Remote Monitoring ............................ 104

COMMUNICATION INTERFACE ..................................... 107

Interface Configuration ...................... 108

MAINTENANCE ............................................................. 112

FAQ ............................................................................... 114

APPENDIX ..................................................................... 116

PSW Default Settings ......................... 116

Error Messages & Messages .............. 118

LCD Display Format ........................... 118

3

PSW Series User Manual

PSW Specifications ............................ 119

PSW Dimensions ............................... 128

Declaration of Conformity .................. 131

INDEX ............................................................................ 132 

4

SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS

This chapter contains important safety
instructions that you must follow during
operation and storage. Read the following before
any operation to insure your safety and to keep
the instrument in the best possible condition.

Safety Symbols

These safety symbols may appear in this manual or on the
instrument.

WARNING

CAUTION

Warning: Identifies conditions or practices that
could result in injury or loss of life.

Caution: Identifies conditions or practices that
could result in damage to the PSW or to other
properties.

DANGER High Voltage

Attention Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

5

PSW Series User Manual

Do not dispose electronic equipment as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased.

Safety Guidelines

General
Guideline

CAUTION

Power Supply

WARNING

 Do not place any heavy object on the PSW.
 Avoid severe impact or rough handling that

 Do not discharge static electricity to the PSW.
 Use only mating connectors, not bare wires, for

 Do not block the cooling fan opening.
 Do not disassemble the PSW unless you are

(Measurement categories) EN 61010-1:2001 specifies the
measurement categories and their requirements as follows. the
PSW falls under category II.

 Measurement category IV is for measurement performed at the

 Measurement category III is for measurement performed in the

 Measurement category II is for measurement performed on the

 Measurement category I is for measurements performed on

 AC Input voltage range: 85VAC~265VAC
 Frequency: 47Hz~63Hz
 To avoid electrical shock connect the protective

leads to damaging the PSW.

the terminals.

qualified.

source of low-voltage installation.

building installation.

circuits directly connected to the low voltage installation.

circuits not directly connected to Mains.

grounding conductor of the AC power cord to
an earth ground.

6

SAFETY INSTRUCTIONS

Cleaning the PSW

Operation
Environment

Storage
environment

 Disconnect the power cord before cleaning.
 Use a soft cloth dampened in a solution of mild

detergent and water. Do not spray any liquid.

 Do not use chemicals containing harsh material

such as benzene, toluene, xylene, and acetone.

 Location: Indoor, no direct sunlight, dust free,

almost non-conductive pollution (Note below)

 Relative Humidity: 20%~ 85%
 Altitude: < 2000m
 Temperature: 0°C to 50°C

(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. The PSW falls under degree 2.

Pollution refers to “addition of foreign matter, solid, liquid, or
gaseous (ionized gases), that may produce a reduction of dielectric
strength or surface resistivity”.

 Pollution degree 1: No pollution or only dry, non-conductive

pollution occurs. The pollution has no influence.

 Pollution degree 2: Normally only non-conductive pollution

occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.

 Pollution degree 3: Conductive pollution occurs, or dry, non-

conductive pollution occurs which becomes conductive due to
condensation which is expected. In such conditions, equipment
is normally protected against exposure to direct sunlight,
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.

 Location: Indoor
 Temperature: -25°C to 70°C
 Relative Humidity: <90%

Disposal

Do not dispose this instrument as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased. Please make sure
discarded electrical waste is properly recycled to
reduce environmental impact.

7

PSW Series User Manual

Power cord for the United Kingdom

When using the power supply in the United Kingdom, make sure
the power cord meets the following safety instructions.

NOTE: This lead/appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the
following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)

As the colours of the wires in main leads may not correspond with
the coloured marking identified in your plug/appliance, proceed
as follows:

The wire which is coloured Green & Yellow must be connected to
the Earth terminal marked with either the letter E, the earth symbol

or coloured Green/Green & Yellow.

The wire which is coloured Blue must be connected to the terminal
which is marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the
terminal marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment
or contact the supplier.

This cable/appliance should be protected by a suitably rated and
approved HBC mains fuse: refer to the rating information on the
equipment and/or user instructions for details. As a guide, a cable
of 0.75mm
conductors would normally require 13A types, depending on the
connection method used.

Any exposed wiring from a cable, plug or connection that is
engaged in a live socket is extremely hazardous. If a cable or plug is
deemed hazardous, turn off the mains power and remove the cable,
any fuses and fuse assemblies. All hazardous wiring must be
immediately destroyed and replaced in accordance to the above
standard.

2

should be protected by a 3A or 5A fuse. Larger

8

GETTING STARTED

A

GETTING STARTED

This chapter describes the power supply in a
nutshell, including its main features and front /
rear panel introduction. After going through the
overview, please read the theory of operation to
become familiar with the operating modes,
protection modes and other safety considerations.

PSW Series Overview ....................................................... 10

Series lineup .............................................................................................................. 10

Main Features ........................................................................................................... 11

ccessories ................................................................................................................ 11

Package Contents ..................................................................................................... 13

Appearance ..................................................................... 14

PSW Front Panel ..................................................................................................... 14

Rear Panel ................................................................................................................. 17

9

PSW Series User Manual

PSW Series Overview

Series lineup

The PSW series consists of 6 models, divided into 3 different model
types covering 3 power capacities: Type I (360 Watt), Type II (720
Watt) and Type III (1080 Watt).

Model name Type Voltage Rating Current Rating Power

PSW 30-36 Type I 0~30V 0~36A 360W

PSW 80-13.5 Type I 0~80V 0~13.5A 360W

PSW 30-72 Type II 0~30V 0~72A 720W

PSW 80-27 Type II 0~80V 0~27A 720W

PSW 30-108 Type III 0~30V 0~108A 1080W

PSW 80-40.5 Type III 0~80V 0~40.5A 1080W

Apart from the differences in output, each unit differs in size. The
720 and 1080 watt models are larger than the 360 watt models to
accommodate the increase in power.

360 Watt models

Type I

Voltage

Multi-Range DC Power Supply

360W

PSW 30-36

VSR

W

C V

V

RMT

%W10080604020

ALM

Current

DLY

W

C C

A

ISR

Function OVP/OCP S et

Output

PWR DSPLLock/LocalTest

720 Watt models

Type I I

Multi-Range DC Power Supply

PSW 30-72

VSR
C V

RMT
ALM
DLY

C C
ISR

Function OVP/OCP Set

PWR DSPLLock/LocalTest

1080 Watt models

Type III

Voltage

720W

W
V

%W10080604020

Current

W
A

Output

10

Main Features

GETTING STARTED

Performance

Features

Interface

 High performance/power
 Power efficient switching type power supply
 Low impact on load devices
 Fast transient recovery time of 1ms
 Fast output response time

 OVP, OCP and OTP protection
 Adjustable voltage and current slew rates
 User adjustable bleeder control to quickly

dissipate the power after shutdown to safe
levels.

 Extensive remote monitoring and control

options

 Support for serial and parallel connections
 Power on configuration settings.
 Supports test scripts
 Web server monitoring and control

 Ethernet port
 Analog connector for analog voltage and current

monitoring

 USB host and device port

Accessories

Standard
Accessories

Region dependant User manual

4323-30600101 Power cord (Type I/II)

Part number Description

11

PSW Series User Manual

4320-91001101 Power cord (Type III)

63SC-XF100201 Output terminal cover: top

63SC-XF100301 Output terminal cover:

bottom

GTL-123 Test leads: 1x red, 1x black

PSW-004 Basic Accessory Kit:

M4 terminal screws and
washers x2, M8 terminal
bolts, nuts and washers x2,
Air filter x1, Analog control
protection dummy x1,
Analog control lock level x1

Optional

Part number Description

Accessories

GET-001 Extended terminal

PSW-001 Accessory Kit:

Pin contact x10, Socket x1,
Protection cover x1

PSW-002 Simple IDC

Tool

PSW-003 Contact

Removal Tool

GRA-410-J Rack mount adapter (JIS)

GRA-410-E Rack mount adapter (EIA)

GUG-001 GPIB to USB adapter

GTL-246 USB Cable

57RG-30B00201 Large filter (Type II/III)

Download Name Description

psw_cdc.inf USB driver

12

GETTING STARTED

Package Contents

Check the contents before using the PSW.

Opening the box

Contents
(single unit)

 Main unit
 Output terminal cover

(top x1, bottom x1)

 Test leads (red x1,

black x1)

 M4 terminal screws

and washers x2

 Air filter x1

 Power cord x1 (region

dependent)

 Analog control

protection dummy x1

 Analog control lock

lever x1

 M8 terminal bolts,

nuts and washers X2

13

PSW Series User Manual

Appearance

PSW Front Panel

PSW 80-27, PSW 30-72 (720W)

PSW 80-40.5, PSW 30-108 (1080W) PSW 80-13.5,

PSW 30-36 (360W)

Multi-Range DC Power Supply

PSW 30-36

VSR
C V

RMT
ALM
DLY

C C
ISR

Function OVP/OCP Set

14

360W

W
V

%W10080604020

W
A

PWR DSPLLock/LocalTest

Voltage

Current

Output

GETTING STARTED

t

Function Keys

The Function keys along with the Output key will
light up when a key is active.

The Function key is used to
configure the power supply.

Set the over current or over
voltage protection levels.

Sets the current and voltage limits.

Used to run customized scripts for
testing.

Lock/Local

Locks or unlocks the panel keys to
prevent accidentally changing
panel settings.

Toggles the display from viewing
V/AV/WA/W.

Display
Indicators

ALM

C C

Voltage Slew Rate
Constant Voltage Mode
Remote Control Mode
Alarm on
Delay Outpu
Constant Current Mode
Current Slew Rate

15

PSW Series User Manual

Voltage Knob

Current Knob

Output

USB

Power Switch

40

100

Current

Power bar
Indicates the current power output

as a percentage.

Sets the voltage.

Sets the current.

Press to turn on the output. The
Output key will light up when the
output is active.

USB A port for data transfer,
loading test scripts etc.

Used to turn the power on/off.

16

GETTING STARTED

Rear Panel

PSW 80-27, PSW 30-72 (720W)

PSW 80-40.5, PSW 30-108 (1080W) PSW 80-13.5,

PSW 30-36 (360W)

AC Input

SER.NO. LABEL

LAN

LN

100 240VAC

47 63Hz

1500VA MAX.

17

PSW Series User Manual

Analog Control
Connector

Output Terminals

USB B port

Standard 26 pin MIL connector
(OMRON XG4 IDC plug).

The analog control connector is
used to monitor current and voltage
output, machine status (OVP, OCP,
OTP etc.), and for analog control of
the current and voltage output.

Use an OMRON XG5 IDC socket as
the mating socket.

Positive (+) and negative (-) output
terminals.

Chassis ground

Sense (-) and Sense (+) terminals.

The USB B port is used for remote
control.

Fans

Ethernet Port

Temperature controlled fans

The ethernet port is used for remote
control and digital monitoring from
a PC.

Line Voltage
Input

(Type I/TypeII)

Type I: PSW 30-36/80-13.5
Type II: PSW 30-72/80-27

 Voltage Input: 100~240 VAC
 Line frequency: 50Hz/60 Hz

(Automatically switchable)

18

GETTING STARTED

Line Voltage
Input

(Type III)

LN

Type III: PSW 30-108/80-40.5

 Voltage Input: 100~240 VAC
 Line frequency: 50Hz/60 Hz

(Automatically switchable)

19

PSW Series User Manual

Theory of Operation

The theory of operation chapter describes the basic principles of
operation, protection modes and important considerations that
must be taken into account before use.

Operating Area Description

Description

The PSW power supplies are regulated DC
power supplies with a high voltage and current
output. These operate in CC or CV mode
within a wide operating range limited only by
the output power.

The operating area of each power supply is
determined by the rated output power as well
as the voltage and current rating. For example
the operating area and rated power output for
the PSW 30-36 is shown below.

When the power supply is configured so that
the total output (current x voltage output) is
less than the rated power output, the power
supply functions as a typical constant current,
constant voltage power supply.

20

If however, the power supply is configured
such that the total output (current x voltage
output) exceeds the rated power output, the

GETTING STARTED

effective output is actually limited to the power
limit of the unit. In this case the output current
and voltage then depend purely on the load
value.

Below is a comparison of the operating areas of
each power supply.

PSW 80V Series Operating Area

4.5 9.0 13.5

90
80

60

40

20

0

0

15

10

PSW 30V Series Operating Area

12 24 36

35

30

25

20

15

Voltage (V)

10

5

0

020

40

25

Current (A)

60

27 40.5

Type I
Type II
Type III

30

35

72 108

Type I
Type II
Type III

80

100

80

26.6

4540205

30

10

120

Current (A)

21

PSW Series User Manual

CC and CV Mode

CC and CV mode
Description

When the power supply is operating in
constant current mode (CC) a constant current
will be supplied to the load. When in constant
current mode the voltage output can vary,
whilst the current remains constant. When the
load resistance increases to the point where the
current limit (I

) can no longer be sustained

SET

the power supply switches to CV mode. The
point where the power supply switches modes
is the crossover point.

When the power supply is operating in CV
mode, a constant voltage will be supplied to
the load, whilst the current will vary as the
load varies. At the point that the load
resistance is too low to maintain a constant
voltage, the power supply will switch to CC
mode and maintain the set current limit.

The conditions that determine whether the
power supply operates in CC or CV mode
depends on the set current (I
(V

), the load resistance (RL) and the critical

SET

resistance (R
determined by V

). The critical resistance is

C

SET/ISET

. The power supply

), the set voltage

SET

will operate in CV mode when the load
resistance is greater than the critical resistance.
This means that the voltage output will be
equal to the V
less than I

voltage but the current will be

SET

. If the load resistance is reduced

SET

to the point that the current output reaches the
I

level, the power supply switches to CC

SET

mode.

22

GETTING STARTED

Conversely the power supply will operate in
CC mode when the load resistance is less than
the critical resistance. In CC mode the current
output is equal to I
less than V

SET

.

and the voltage output is

SET

23

Slew Rate

PSW Series User Manual

Theory

Bleeder Control

The PSW has selectable slew rates for CC and
CV mode. This gives the PSW power supply
the ability to limit the current/voltage draw of
the power supply. Slew rate settings are
divided into High Speed Priority and Slew
Rate Priority. High Speed Priority mode
disables slew rate settings for CC or CV mode.
Slew Rate Priority mode allows for user
adjustable slew rates for CC or CV mode. The
rising and falling slew rate can be set
independently.

Slew rate=

Disabled

Slew rate =

Enabled

Description

The PSW DC power supplies employ a bleed
resistor in parallel with the output terminals.

Bleed resistors are designed to dissipate the
power from the power supply filter capacitors
when power is turned off and the load is
disconnected. Without a bleed resistor, power

24

GETTING STARTED

may remain charged on the filter capacitors for
some time and be potentially hazardous.

In addition, bleed resistors also allow for
smoother voltage regulation of the power
supply as the bleed resistor acts as a minimum
voltage load.

The bleed resistance can be turned on or off
using the configuration settings.

Note

Internal Resistance

Description

Internal
Resistance Range

By default the bleed resistance is on. For battery
charging applications, be sure to turn the bleed
resistance off as the bleed resistor can discharge
the connected battery when the unit is off.

On the PSW, the internal resistance of the
power supply can be user-defined in software.
(Internal Resistance Setting, page 78). When the
internal resistance is set it can be seen as a
resistance in series with the positive output
terminal. This allows the power supply to
simulate power sources that have internal
resistances such as lead acid batteries.

Unit Model
PSW 30-36
PSW 30-72
PSW 30-108
PSW 80-13.5
PSW 80-27
PSW 80-40.5

Internal Resistance Range

0.000 ~ 0.833Ω

0.000 ~ 0.417Ω

0.000 ~ 0.278Ω

0.000 ~ 5.926Ω

0.000 ~ 2.963Ω

0.000 ~ 1.975Ω

25

PSW Series User Manual

Alarms

The PSW power supplies have a number of protection features.
When one of the protection alarms are set, the ALM icon on the
display will be lit. For details on how to set the protection modes,
please see page 43.

OVP

Overvoltage protection (OVP) prevents a high
voltage from damaging the load.

OCP

Overcurrent protection prevents high current
from damaging the load.

OTP

Over temperature protection protects the
instrument from overheating.

Power Switch Trip

When the Power Switch Trip configuration
setting is enabled, the power supply will
automatically shut down when a protection
setting has been tripped (OCP, OVP, OTP).

Alarm output

Alarms are output via the analog control
connector. The alarm output is an isolated
open-collector photo coupler output.

Considerations

The following situations should be taken into consideration when
using the power supply.

Inrush current

26

When the power supply switch is first turned
on, an inrush current is generated. Ensure there
is enough power available for the power
supply when first turned on, especially if a
number of units are turned on at the same
time.

GETTING STARTED

Pulsed or Peaked
loads

Reverse Current:
Regenerative load

When the load has current peaks or is pulsed, it
is possible for the maximum current to exceed
the mean current value. The PSW power
supply ammeter only indicates mean current
values, which means for pulsed current loads,
the actual current can exceed the indicated
value. For pulsed loads, the current limit must
be increased, or a power supply with a greater
capacity must be chosen. As shown below, a
pulsed load may exceed the current limit and
the indicated current on the power supply
ammeter.

When the power supply is connected to a
regenerative load such as a transformer or
inverter, reverse current will feed back to the
power supply. The PSW power supply cannot
absorb reverse current. For loads that create
reverse current, connect a resistor in parallel to
the power supply to bypass the reverse
current. This description only applies when the
bleed resistance is off.

27

PSW Series User Manual

Note

Reverse Current:
Accumulative
energy.

CAUTION

The current output will decrease by the amount of
current absorbed by the resistor.

Ensure the resistor used can withstand the power
capacity of the power supply/load.

When the power supply is connected to a load
such as a battery, reverse current may flow
back to the power supply. To prevent damage
to the power supply, use a reverse-current­protection diode in series between the power
supply and load.

Ensure the reverse withstand voltage of the diode
is able to withstand 2 times the rated output
voltage of the power supply and the forward
current capacity can withstand 3 to 10 times the
rated output current of the power supply.

28

Ensure the diode is able to withstand the heat
generated in the following scenarios.

When the diode is used to limit reverse voltage,
remote sensing cannot be used.

GETTING STARTED

Grounding

The output terminals of the PSW power supplies are isolated with
respect to the protective grounding terminal. The insulation
capacity of the load, the load cables and other connected devices
must be taken into consideration when connected to the protective
ground or when floating.

Floating

WARNING

As the output terminals are floating, the load
and all load cables must have an insulation
capacity that is greater than the isolation
voltage of the power supply.

If the insulation capacity of the load and load
cables is not greater than the isolation voltage of
the power supply, electric shock may occur.

29

PSW Series User Manual

Grounded output
terminal

CAUTION

If the positive or negative terminal is connected
to the protective ground terminal, the
insulation capacity needed for the load and
load cables is greatly reduced. The insulation
capacity only needs to be greater than the
maximum output voltage of the power supply
with respect to ground.

If using external voltage control, do not ground
the external voltage terminal as this will create a
short circuit.

30

OPERATION

W

OPERATION

Set Up ............................................................................. 33

Line Voltage Connection – Type III Models ....................................................... 33

Filter Installation ...................................................................................................... 35

Power Up .................................................................................................................. 36

ire Gauge Considerations .................................................................................... 37

Output Terminals .................................................................................................... 38

Using the Output Terminal Cover ........................................................................ 40

Using the Rack Mount Kit...................................................................................... 41

How to Use the Instrument ................................................................................... 41

Basic Operation .............................................................. 43

Setting OVP/OCP Levels ...................................................................................... 43

Set to C.V. Mode ..................................................................................................... 45

Set to C.C. Mode ...................................................................................................... 47

Display Modes .......................................................................................................... 49

Panel Lock ................................................................................................................ 50

Remote Sense ........................................................................................................... 50

Parallel / Series Operation .............................................. 54

Master-Slave Parallel Overview .............................................................................. 55

Master-Slave Parallel Connection .......................................................................... 56

Master-Slave Parallel Operation ............................................................................. 59

Master-Slave Series Overview ................................................................................ 61

Master-Slave Series Connection ............................................................................. 62

Master-Slave Series Operation ............................................................................... 64

Test Scripts ..................................................................... 66

Test Script File Format ........................................................................................... 67

Test Script Settings .................................................................................................. 67

Setting the Test Function Settings ......................................................................... 68

Load Test Script from USB .................................................................................... 69

Run Test Script......................................................................................................... 70

Export Test Script to USB ..................................................................................... 71

31

PSW Series User Manual

T

Delete

est Script ....................................................................................................72

32

OPERATION

Set Up

Line Voltage Connection – Type III Models

Background

Warn ing

Removal

The Type III (PSW 30-108/PSW 80-40.5) models
use a universal power input that can be used
with 100 and 200 VAC systems. To connect or
replace the power cord (GW Instek part
number: 4320-91001101, use the procedure
below:

The following procedure should only be attempted
by competent persons.

Ensure the AC power cord is not connected to
power.

1. Turn off the power switch.

2. Unscrew the power cord
protective sheath.

3. Remove the 2 screws
holding the power cord
cover and remove.

33

PSW Series User Manual

Installation

4. Slide the cover off the AC
terminals.

5. Remove the AC power
cord wires.

1. Connect the AC power
cord wires to the AC input
terminals.

 White/Blue  Neutral

(N)

 Green/Green-

yellowGND (

 Black/Brown  Line

)

(L)

2. Set the cover back over the
AC terminals.

3. Re-install the power cord
cover.

4. Screw the power cord
sheath back onto the cover.

3

4

34

OPERATION

Filter Installation

Background

Steps

The PSW has a small filter (GW Instek part
number, 57RG-30B00101) that must first be
inserted under the control panel before
operation. The small filter must be inserted for
all model types (Type I/II/II).

1. Insert the small filter
in the open area
under the control
panel.

Type II shown as an
example

2. The unit is now ready to power up.

35

Power Up

PSW Series User Manual

Steps

CAUTION

1. Type I or II: Connect the
power cord to the rear
panel socket.

Type III: Connect the

Page 33

power cord to the
universal power input.

2. Press the POWER key. If used for the first time,
the default settings will appear on the display,
otherwise The PSW recovers the state right
before the power was last turned OFF.

For default configuration settings, see page 116.

The power supply takes around 8 seconds to fully
turn on and shutdown.

Do not turn the power on and off quickly. Please
wait for the display to fully turn off.

36

OPERATION

Wire Gauge Considerations

Background

Before connecting the output terminals to a
load, the wire gauge of the cables should be
considered.

It is essential that the current capacity of the
load cables is adequate. The rating of the cables
must equal or exceed the maximum current
rated output of the instrument.

Recommended
wire gauge

Wire Gauge Maximum Current

20 2.5A
18 4A
16 6A
14 10A
12 16A
10 21A
8 36A
6 61A
4 97A

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PSW Series User Manual

Output Terminals

Background

WARNING

Before connecting the output terminals to the
load, first consider whether voltage sense will
be used, the gauge of the cable wiring and the
withstand voltage of the cables and load.

The output terminals can be connected to load
cables using M4 sized screws or M8 sized bolts.

Dangerous voltages. Ensure that the power to the
instrument is disabled before handling the power
supply output terminals. Failing to do so may lead
to electric shock.

1. Turn the power switch off.

2. Remove the output terminal cover.

3. If necessary, screw the chassis

Page 40

Page 29

ground terminal to either the
positive or negative terminal. See
the grounding chapter for details.

4. Choose a suitable wire gauge for

Page 37

the load cables.

38

OPERATION

Connection
without sense
wiring

5. Choose a suitable crimp for the terminals.

6. If using voltage sense, remove the

Page 50

sense terminal joining plates and

connect sensing wires to the

load(s).

7. Connect the positive load cable to the positive
output terminal and the negative cable to the
negative output terminal.

8. Reattach the output terminal

Page 40

cover.

Using M4 screws

Using M8 bolts

Connection with
sense wiring

Using M4 screws

Sense +

Using M8 bolts

Sense -

39

PSW Series User Manual

Using the Output Terminal Cover

Background

1. Line-up the bottom cover with the notch in the
output terminals.

2. Place the top terminal cover over the bottom
cover.

3. Use your thumb to slide the terminal covers
shut, as shown in the diagram below.

4. The top and bottom cover should be flush, as
shown in the diagram.

40

OPERATION

Removal

Reverse the procedure to remove the terminal
covers.

Using the Rack Mount Kit

Background

Rack mount
diagram

The PSW series has an optional Rack Mount
Kit (GW Instek part number: [JIS] GRA-410-J,
[EIA] GRA-410-E[EIA]) that can be used to
hold 6x PSW Type I models, 3x Type II models,
2x Type III models or a combination of all
models (1x Type I, 1x Type II and 1x Type III).

Type I Type II Type III

How to Use the Instrument

Background

The PSW power supplies use a novel method
of configuring parameter values only using the
voltage or current knobs. The knobs are used to
quickly edit parameter values at 0.01, 0.1 or 1
unit steps at a time.

When the user manual says to set a value or
parameter, use the steps below.

Example

Use the voltage knob to set a voltage of 10.05
volts.

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PSW Series User Manual

→

1. Repeatedly press the voltage knob
until the last digit is highlighted.
This will allow the voltage to be
edited in 0.01 volt steps.

2. Turn the voltage knob till 0.05
volts is shown.

V

→

A

3. Repeatedly press the voltage knob until the
first digit is highlighted. This will allow the
voltage to be edited in 1 volt steps.

4. Turn the voltage knob until 10.05 is shown.

V

A

Notice the Set key becomes illuminated when

Note

setting the current or voltage.

If the voltage or current knobs are unresponsive,
press the Set key first.

42

OPERATION

Basic Operation

This section describes the basic operations required to operate the
power supply.

 Setting OVP/OCP → from page 43
 C.V. mode → from page 45
 C.C. mode → from page 47
 Display modes → page 49
 Panel lock → page 50
 Remote sensing → from page 50

Before operating the power supply, please see the Getting Started
chapter, page 9.

Setting OVP/OCP Levels

The OVP and OCP levels have a selectable
range of 10% to 110% of the rated output
voltage/current of the power supply. The OVP
and OCP level is set to 110% by default. When
one of the protection measures are on, ALM is
shown on the panel display.

By default, the power switch will turn off when
any of the protection levels are tripped.

Before setting the OVP or OCP level:

 Ensure the load is not connected.
 Ensure the output is set to off.

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PSW Series User Manual

1. Press the OVP/OCP key. The
OVP/OCP key lights up.

2. The OVP setting will be displayed on the top
and the OCP setting will be displayed on the
bottom.

OVP Level

3. Use the voltage knob to set the
OVP level.

Range

10%~110% of rated
output voltage.

OCP Level

4. Use the current knob to set the
OCP level.

Range

10%~110% of rated
output current.

Voltage

Current

5. Press OVP/OCP again to exit. The
OVP/OCP indicator will turn off.

Power switch trip

6. Set F-95 (Power switch trip) to 1 (to

Page 86

disable the power switch trip) or to
0 (to enable the power switch trip)
and save.

44

F-95

1 (Disable) or 0 (Enable)

OPERATION

Set to C.V. Mode

When setting the power supply to constant voltage mode, a current
limit must also be set to determine the crossover point. When the
current exceeds the crossover point, the mode switches to C.C.
mode. For details about C.V. operation, see page 20. C.C. and C.V.
mode have two selectable slew rates: High Speed Priority and Slew
Rate Priority. High Speed Priority will use the fastest slew rate for
the instrument while Slew Rate Priority will use a user-configured
slew rate.

Background

Before setting the power supply to C.V. mode,
ensure:

 The output is off.
 The load is connected.

Steps

1. Press the Function key. The
Function key will light up.

2. Set F-03 (V-I Mode Slew Rate
Select) to 0 (CV High Speed
Priority) or 2 (CV Slew Rate
Priority) and save.

F-03

0 = CV High Speed Priority
2 = CV Slew Rate Priority

3. If CV slew rate priority was chosen
as the operating mode, set F-04
(Rising Voltage Slew Rate) and the
F-05 (Falling Voltage Slew Rate)
and save.

F-04
F-05

0.1V/s~60V/s (PSW 30-XX)

0.1V/s~160V/s (PSW 80-XX)

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Page 84

45

PSW Series User Manual

4. Use the Current knob to set the
current limit (crossover point).

5. Use the Voltage knob to set the

Voltage

voltage.

Notice the Set key becomes illuminated when

Note

setting the current or voltage. If the voltage or
current knobs are unresponsive, press the Set key
first.

6. Press the Output key. The Output
key becomes illuminated.

Note

output is on. The current level can only be changed
by pressing the Set key.

46

Only the voltage level can be altered when the

OPERATION

Set to C.C. Mode

When setting the power supply to constant current mode, a voltage
limit must also be set to determine the crossover point. When the
voltage exceeds the crossover point, the mode switches to C.V.
mode. For details about C.C. operation, see page 20. C.C. and C.V.
mode have two selectable slew rates: High Speed Priority and Slew
Rate Priority. High Speed Priority will use the fastest slew rate for
the instrument while Slew Rate Priority will use a user-configured
slew rate.

Background

Before setting the power supply to
C.C. mode, ensure:

 The output is off.
 The load is connected.

Steps

1. Press the Function key. The
Function key will light up.

2. Set F-03 (V-I Mode Slew Rate
Select) to 1 (CC High Speed
Priority) or 3 (CC Slew Rate
Priority) and save.

F-03

1 = CC High Speed Priority
3 = CC Slew Rate Priority

3. If CC Slew Rate Priority was
chosen as the operating mode, set
F-06 (Rising Current Slew Rate)
and F-07 (Falling Current Slew
Rate) and save.

Page 84

Page 84

47

PSW Series User Manual

F-06
F-07

0.01A/s~72.00A/s (PSW 30-36)

0.01A/s~144.0A/s (PSW 30-72)

0.01A/s~216.0A/s (PSW 30-108)

0.01A/s~27.00A/s (PSW 80-13.5)

0.01A/s~54.00A/s (PSW 80-27)

0.01A/s~81.00A/s (PSW 80-40.5)

4. Use the Voltage knob to set the
voltage limit (crossover point).

5. Use the Current knob to set the
current.

Notice the Set key becomes illuminated when

Note

setting the current or voltage. If the voltage or
current knobs are unresponsive, press the Set key
first.

6. Press the Output key. The Output
key becomes illuminated.

Voltage

Current

Only the current level can be altered when the

Note

output is on. The voltage level can only be changed
by pressing the Set key.

48

OPERATION

Display Modes

The PSW power supplies allow you to view the output in three
different modes: voltage and current, voltage and power or current
and power.

1. Press the PWR/DSPL key. The
PWR DSPL key lights up.

2. The display changes to voltage and power
(V/W).

3. To switch between displaying A/W and V/W,
simply press the corresponding voltage or
current knob.

For example: when in A/W mode, press the
voltage knob to display V/W. Conversely
when in V/W mode, press the current knob to
display A/W.

W

A

 When V/W is displayed, the voltage knob

can still be used to change the voltage level.

 When A/W is displayed, the current knob

can still be used to change the current level.

Exit

Press the PWR/DSPL key again to
return to normal display mode.
The PWR DSPL light will turn off.

49

PSW Series User Manual

Panel Lock

The panel lock feature prevents settings from being changed
accidentally. When activated, the Lock/Local key will become
illuminated and all keys and knobs except the Lock/Local key and
Output key (if active) will be disabled.

If the instrument is remotely controlled via the USB/LAN interface,
the panel lock is automatically enabled.

Activate the panel
lock

Press the Lock/Local key to active
the panel lock. The key will
become illuminated.

Disable the panel
lock

Hold the Lock/Local key for ~3
seconds to disable the panel lock.
The Lock/Local light turns off.

Remote Sense

Remote sense is used to compensate for the voltage drop seen
across load cables due to the resistance inherent in the load cables.
The remote sense terminals are connected to the load terminals to
determine the voltage drop across the load cables.

Remote sense can compensate up to 0.6 volts (compensation
voltage). Load cables should be chosen with a voltage drop less
than the compensation voltage.

50

OPERATION

WARNING

Note

Single Load

Ensure the output is off before connecting any
sense cables.

Use sense cables with a voltage rating exceeding
the isolation voltage of the power supply.

Never connect sensing cables when the output is
on. Electric shock or damage to the power supply
could result.

Be sure to remove the Sense joining plates so the
units are not using local sensing.

1. Connect the Sense+ terminal to the positive
potential of the load. Connect the Sense­terminal to the negative potential of the load.

Page 38

2. Operate the instrument as normal.

Page 43

See the Basic Operation chapter for
details.

51

PSW Series User Manual

Parallel PSW
Units

1. Connect the Sense+ terminals to the positive
potential of the load. Connect the Sense­terminals to the negative potential of the load.

Page 38

2. Operate the instrument as normal.

Page 55

See the Parallel Operation chapter
for details.

Serial PSW Units

1. a. Connect the 1st Sense+ terminal to the
positive potential of the load.

b. Connect the 1

st

Sense- terminal to the
positive output terminal of the second PSW
unit.

c. Connect the 2

nd

Sense+ terminal to the

positive terminal of the second PSW unit.

d. Connect the 2

nd

Sense- terminal to negative

terminal of the load.

52

OPERATION

Wire Shielding
and Load line
impedance

Page 38

2. Operate the instrument as normal.

Page 61

See the Serial Operation chapter
for details.

To help to minimize the oscillation due to the
inductance and capacitance of the load cables,
use an electrolytic capacitor in parallel with the
load terminals.

To minimize the effect of load line impedance
use twisted wire pairing.

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PSW Series User Manual

Parallel / Series Operation

This section describes the basic operations required to operate the
power supply in series or parallel. Operating the PSW series in
parallel increases the total power output of the power supply units.
When used in series, the total output voltage of the power supplies
can be increased.

The number of the power supplies that can be connected in series
or parallel depends on the model and the mode:

 Series Mode: 2 units maximum
 Parallel Mode: 3 units maximum

To use the power supplies in series or parallel, units must be used
in a Master-Slave configuration. In the master-slave configuration a
“master” power supply controls any other connected “slave”
power supplies.

 Master-Slave Parallel overview → from page 55
 Parallel connection → from page 56
 Parallel operation → from page 59
 Master-Slave Series overview → page 61
 Series connection → page 62
 Series operation → from page 64

Before operating the power supply, please see the Getting Started
chapter, page 9.

54

OPERATION

Master-Slave Parallel Overview

Description

Limitations

When connecting the PSW power supplies in
parallel, up to 3 units can be used in parallel
and all units must be of the same model.

When the units are used in parallel, a number
of precautions and limitations apply. Please
read this overview before operating the power
supplies in parallel.

Display

 Only the master unit will display the voltage

and current.

OVP/ OCP

 The master unit can shut down slave units

when OVP/OCP is tripped on the master
unit (if the slave connector is wired for shut
down on alarm).

 OVP/OCP can be independently tripped on

each slave unit, however the shutdown of
the power or output of the unit is disabled.
Only the alarm will be enabled.

Remote monitoring

 Voltage monitoring (VMON) and current

monitoring (IMON) are only supported on
the master unit.

Remote Sense

 Please see the remote sense chapter for

details, page 50.

Voltage controlled remote control

 Voltage controlled remote control can only

be used with the master unit.

55

PSW Series User Manual

Model Single unit 2 units 3 units
Output Voltage/
Output Current

PSW 30-36 30V 30V 30V

36A 72A 108A

PSW 80-13.5 80V 80V 80V

13.5A 27A 40.5A

PSW 30-72 30V 30V 30V

72A 144A 216A
PSW 80-27 80V 80V 80V
27A 54A 81A
PSW 30-108 30V 30V 30V
108A 216A 324A
PSW 80-40.5 80V 80V 80V

40.5A 81A 121.5A

Master-Slave Parallel Connection

Master-Slave
Connector

Analog Connector
Connection

The Analog Control Connector is used for both
serial and parallel connections. The way the
connector is configured determines the
behavior of the master and slave units. For the
complete connector pin assignment, see page

89.

To operate the power supplies in parallel,
connect the analog connectors on the master
and slave units as shown in the diagrams
below.

56

OPERATION

Master with 2 slave units:

Master with 1 slave unit:

23

1315172021

11 1

12

Master unit

11 1I MON CURRENT SHARE

OUTPUT ON STATUS21

ALM STATUS20

17

STATUS COM

15

FEEDBACK

13

CURRENT_SUM_1

12

SHUTDOWN

2D COM

DETECT OUT26

23 DETECT IN

2

23

24 20 12

26

Slave Unit 1

24

12 SHUTDOWN

17 STATUS COM

15 FEEDBACK

3 CURRENT SUM OUT

20 ALM STATUS

23 DETECT IN

26 DETECT OUT

17 15 326

OUT ON/OFF CONT

57

Parallel Output
Connection

PSW Series User Manual

Steps

Note

1. Ensure the power is off on all power supplies.

2. Choose a master and a slave unit(s).

3. Connect the analog connectors for the master
and slave unit as shown above.

4. Remove the Output Terminal

Page 40

covers and the protection dummy
plug from the analog control
connector.

5. Connect the master and slave unit in parallel as
shown above.

6. Reattach the terminal covers.

Ensure the load cables have sufficient

Page 40

Page 37

current capacity.

Re-attach the Protection dummy plug when not in
use.

58

OPERATION

Master-Slave Parallel Operation

Master-Slave
Configuration

Before using the power supplies in parallel, the
master and slave units need to be configured.

1. Configure the OVP and OCP
settings for the master unit.

2. For each unit, hold the Function
key while turning the power on to
enter the power on configuration
settings.

3. Configure F-93 (Master/Slave)
setting for each master/slave unit.

Unit

Master (with 1 slave in parallel)

Master (with 2 slaves in parallel)

Slave unit (parallel slave)

4. Cycle the power on the units (reset the power).

Page 43

Page 86

F-93
1
2
3

Note

Configuration settings can be checked for both the
master and slave units by pressing the Function
key and checking F-93.

Only the Master OVP and OCP level is used for
over voltage and current protection. Slave OVP and
OCP level is disregarded.

OTP works independently for each unit.

59

PSW Series User Manual

Master-Slave
Operation

Only operate the power supplies in parallel if
the units are configured correctly.

1. Turn on the master and slave units. The slave
unit(s) will show a blank display.

Master unit Slave units

2. Operation of all units is controlled
via the master unit. Operation of
the master unit is the same as for a
single unit. See the Basic Operation
chapter.

3. Press the Output key to begin.

Only operate the power supplies in parallel if using

Caution

units of the same model number.

Page 43.

Output

Only a maximum of 3 units can be used in parallel.

The panel controls are disabled on slave units,

Note

including the output key. On slave units only the
Function key can be used to view the current
settings.

60

OPERATION

Master-Slave Series Overview

Background

Limitations

When connecting PSW power supplies in
series, up to 2 units can be used in series and all
units must be of the same model.

When the units are used in series, a number of
precautions and limitations apply. Please read
this overview before operating the power
supplies in series.

Display

 Only the master unit will display the

current.

 Master and slave units display the voltage.

The total voltage is the sum of the units.

OVP/OCP

 The master unit can shut down the slave

unit when OVP/OCP is tripped on the
master unit (if the slave connector is wired
for shut down on alarm).

 OVP and OCP level is determined by the

master OVP and OCP level. The OVP and
OCP level on the slave unit is ignored.

Remote monitoring

 Voltage monitoring (VMON) and current

monitoring (IMON) are only supported on
the master unit.

Remote Sense

 Please see the remote sense chapter for

details, page 50.

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PSW Series User Manual

Voltage controlled remote control

 Voltage controlled remote control can only

be used with the master unit.

Model Single unit 2 units
Output Voltage/
Output Current

PSW 30-36 30V 60V

36A 36A

PSW 80-13.5 80V 160V

13.5 13.5A

PSW 30-72 30V 60V

72A 72A
PSW 80-27 80V 160V
27A 27A
PSW 30-108 30V 60V
108A 108A
PSW 80-40.5 80V 160V

40.5A 40.5A

Master-Slave Series Connection

Master-Slave
Connector

The Analog Control Connector is used for both
serial and parallel connections. The way the
connector is configured determines the
behavior of the master and slave units. For the
connector pin assignment, see page 89.

Analog Connector
Connection

62

To operate the power supplies in series, connect
the analog connectors on the master and slave
unit as shown in the diagram below.

Series Output
Connection

OPERATION

Steps

Load

+

Slave unit

-

Master unit

1. Ensure the power is off on both power supplies.

2. Choose a master and slave unit.

3. Connect the analog connectors for the master
and slave unit as shown above.

4. Remove the output terminal cover

Page 40

and the protection dummy plug
from the analog control connector.

5. Connect the master and slave unit in series as
shown above.

6. Reattach the terminal cover.

Page 40

63

PSW Series User Manual

Note

current capacity.

Re-attach the protection dummy plug when not in
use.

Master-Slave Series Operation

Ensure load cables have sufficient

Master-Slave
Configuration

Before using the power supplies in series, the
master and slave units need to be configured.

1. Configure the OVP and OCP
settings for the master unit.

2. For each unit, hold the Function
key while turning the power on to
enter the power on configuration
settings.

3. Configure F-93 (Master/Slave)
setting for each master/slave unit.

Page 37

Page 43

Multi-Range DC Power Supply

PSW 30-36

VSR
C V

RMT
ALM
DLY

C C
ISR

Function OVP/OCP Set

Page 86

Voltage

360W

W
V

%W10080604020

Current

W
A

Output

PWR DSPLLock/LocalTest

Unit

Master (local or series operation)

Slave unit (series)

F-93
0
4

4. Cycle the power on the units (reset the power).

Configuration settings can be checked for both the

Note

master and slave units by pressing the Function
key.

Master-Slave
Operation

64

Only operate the power supplies in series if the
units are configured correctly.

OPERATION

1. Turn on the master and slave unit. The slave
unit will only show the voltage.

Master unit Slave units

2. Operation of all units is controlled
via the master unit. Operation of
the master unit is the same as for a
single unit. Please see the basic
operation chapter for details.

3. Press the Output key to begin.

Only operate the power supplies in series if using

CAUTION

units of the same model number.

Only a maximum of 2 units can be used in series.

Page 43

Output

Note

including the output key.

65

The panel controls are disabled on slave units,

PSW Series User Manual

Test Scripts

This section describes how to use the Test function to run, load and
save test scripts for automated testing. The Test function is useful if
you want to perform a number of tests automatically. The PSW test
function can store ten test scripts in memory.

Each test script is programmed in a scripting language. For more
information on how to create Test Scripts, please see the
programming manual.

 Test script file structure → from page 67
 Load Test Script → from page 69
 Run Test Script → from page 70
 Export Test Script → from page 71
 Remove Test Script → from page 72

66

OPERATION

Test Script File Format

Description

The test files are saved in *.tst file format.

Each file is saved as tXXX.tst, where XXX is the
save file number 001~010.

Test Script Settings

Test R u n

T-01 1~10

Test L o ad

T-02 1~10 (USBPSW)

Runs the chosen test script from the internal
memory. A script must first be loaded into the
internal memory before it can be run. See the
test function Test Save, below.

The script will run as soon as the test function is
started.

Loads a test script from the USB drive to the
designated save slot in memory. A script must
first be loaded into internal memory before it
can be run.

Test E x po rt

Exports a script from the designated memory
save slot to the USB drive.

T-03 1~10 (PSWUSB)

Test Remove

Deletes the chosen test file from the PSW
internal memory.

T-04 1~10

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PSW Series User Manual

Setting the Test Function Settings

Steps

The test script settings (T-01~T-04) are set with
the Test key.

1. Press the Test key. The Test key
will light up.

2. The display will show T-01 on the top and the
memory no. for T-01 on the bottom.

3. Rotate the voltage knob to change
the T setting (Test setting).

Test R u n

Test L o ad

Test E x po rt

Test Remove

Test Setting

Memory

number

Voltage

T-01
T-02
T-03
T-04

4. Rotate the current knob to choose a

Current

memory number.

Range

1~10

5. Press the Voltage knob to complete
the setting.

68

OPERATION

Exit

Press the Test key again to exit the
Test settings. The Test key light
will turn off.

Load Test Script from USB

Overview

Before a test script can be run, it must first be
loaded into a one of the 10 memory save slots.
Before loading a test script into memory:

 Ensure the script file is placed in the root

directory.

 Ensure the file name number corresponds to

the memory number that you wish to save
to.

For example: A test file named t001.tst can
only be saved to memory number 01, t002.tst
can only be saved to memory number 02,
and so on.

Steps

1. Insert a USB flash drive into the
front panel USB-A slot. Ensure the
flash drive contains a test script in
the root directory.

2. Turn on the power. MS (Mass Storage) will be
displayed on the screen after a few seconds if
the USB drive is recognized.

69

PSW Series User Manual

Note

that the function settings for F-20 = 1 (page 80). If
not, reinsert the USB flash drive.

If the USB drive is not recognized, check to see

3. Configure T-02 (Test Load) to 1~10
(save memory slot)

T-02 range

4. The script will now be available in the memory
slot the script was saved to.

1~10 (t001 ~t010)

Error messages: If you load a file that is not

Note

present on the USB drive “Err 002” will be
displayed on the display.

Run Test Script

Page 68

Overview

70

A test script can be run from one of ten memory
slots.

1. Before a test script can be run, it
must first be loaded into one of the
10 memory save slots.

2. Configure T-01 (Run Test) to 1~10
(save memory slot)

T-01 range

3. The test script will automatically start to run.

1~10

Page 69

Page 68

OPERATION

Note

an empty memory location “Err 003” will be
displayed on the display.

When a script starts to run, there is no way to abort

Error messages: If you try to run a test script from

Note

the script. Pressing the Output key has no effect. If
you wish to stop a test early, turn the power off.

Export Test Script to USB

Overview

The Export Test function saves a test file to the
root directory of a USB flash drive.

 Files will be saved as tXXX.tst where XXX is

the memory number 001~010 from which
the test script was exported from.

 Files of the same name on the USB flash

drive will be written over.

Steps

1. Insert a USB flash drive into the
front panel USB-A slot.

2. Turn on the power. MS (Mass Storage) will be
displayed on the screen after a few seconds if
the USB drive is recognized.

71

PSW Series User Manual

Note

that the function settings for F-20 = 1 (page 80). If
not, reinsert the USB flash drive.

3. Configure T-03 (Test Export) to
0~10 (save memory slot)

If the USB drive is not recognized, check to see

T-03 range

1~10

4. The script will now be copied to the USB flash
drive.

Error messages: If you try to export a test script

Note

from an empty memory location “Err 003” will be
displayed on the display.

Delete Test Script

Page 68

Overview

The Remove Test function will delete a test
script from the internal memory.

1. Select T-04 (Test Remove) and

Page 68

choose which test script to remove
from the internal memory.

T-04 range

1~10

2. The test script will be removed from the
internal memory.

72

OPERATION

Note

Error messages: If you try to remove a test script
from an empty memory location “Err 003” will be
displayed on the display.

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PSW Series User Manual

CONFIGURATION

Configuration .................................................................. 75

Configuration Table ................................................................................................ 75

Normal Function Settings ...................................................................................... 78

USB/GPIB Settings ................................................................................................ 80

LAN Settings ............................................................................................................ 81

Power On Configuration Settings ......................................................................... 83

Calibration ................................................................................................................ 84

74

CONFIGURATION

Configuration

Configuration of the PSW power supplies is divided into five
different configuration settings: Normal Function, USB/GPIB, LAN,
Power ON Configuration and Calibration Settings. Power ON
Configuration differs from the other settings in that the settings
used with Power ON Configuration settings can only be set during
power up. The other configuration settings can be changed when
the unit is already on. This prevents some important configuration
parameters from being changed inadvertently. Power On
Configuration settings are numbered F-90 to F-95 and the other
configuration settings are numbers F-00 to F-61.

Configuration Table

Please use the configuration settings listed below when applying
the configuration settings.

Normal Function
Settings Setting Setting Range

Output ON delay time F-01 0.00s~99.99s
Output OFF delay time F-02 0.00s~99.99s

0 = CV high speed priority

V-I mode slew rate select F-03

Rising voltage slew rate F-04

Falling voltage slew rate F-05

Rising current slew rate F-06

1 = CC high speed priority
2 = CV slew rate priority
3 = CC slew rate priority

0.01V/s~60.00V/s (PSW 30-XX)

0.1V/s~160.0V/s (PSW 80-XX)

0.01V/s~60.00V/s (PSW 30-XX)

0.1V/s~160.0V/s (PSW 80-XX)

0.01A/s~72.00A/s (PSW 30-36)

0.1A/s~144.0A/s (PSW 30-72)

0.1A/s~216.0A/s (PSW 30-108)

0.01A/s~27.00A/s (PSW 80-13.5)

0.01A/s~54.00A/s (PSW 80-27)

0.01A/s~81.00A/s (PSW 80-40.5)

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PSW Series User Manual

0.01A/s~72.00A/s (PSW 30-36)

0.1A/s~144.0A/s (PSW 30-72)

Falling current slew rate F-07

0.1A/s~216.0A/s (PSW 30-108)

0.01A/s~27.00A/s (PSW 80-13.5)

0.01A/s~54.00A/s (PSW 80-27)

0.01A/s~81.00A/s (PSW 80-40.5)

0.000

Ω~0.833Ω (PSW 30-36)
Ω~0.417Ω (PSW 30-72)

0.000
Internal resistance
setting

F-08

0.000

Ω~0.278Ω (PSW 30-108)
Ω~5.926Ω (PSW 80-13.5)

0.000

0.000

Ω~2.963Ω (PSW 80-27)
Ω~1.975Ω (PSW 80-40.5)

0.000
Bleeder circuit control F-09 0 = OFF, 1 = ON
Buzzer ON/OFF control F-10 0 = ON, 1 = OFF
USB/GPIB settings
Front panel USB State F-20 0 = Absent, 1 = Mass Storage

Rear panel USB State F-21

Rear panel USB mode F-22

0 = Absent, 2 = USB-CDC, 3 = GPIB­USB adapter
0 = Disable, 1 = GPIB-USB adapter,

2 = USB CDC
GPIB address F-23 0~30
LAN settings
MAC Address-1 F-30 0x00~0xFF
MAC Address-2 F-31 0x00~0xFF
MAC Address-3 F-32 0x00~0xFF
MAC Address-4 F-33 0x00~0xFF
MAC Address-5 F-34 0x00~0xFF
MAC Address-6 F-35 0x00~0xFF
LAN F-36 0 = Disable, 1 = Enable
DHCP F-37 0 = Disable, 1 = Enable
IP Address-1 F-39 0~255
IP Address-2 F-40 0~255
IP Address-3 F-41 0~255
IP Address-4 F-42 0~255
Subnet Mask-1 F-43 0~255
Subnet Mask-2 F-44 0~255
Subnet Mask-3 F-45 0~255
Subnet Mask-4 F-46 0~255
Gateway-1 F-47 0~255
Gateway-2 F-48 0~255

76

CONFIGURATION

Gateway-3 F-49 0~255
Gateway-4 F-50 0~255
DNS address -1 F-51 0~255
DNS address -2 F-52 0~255
DNS address-3 F-53 0~255
DNS address-4 F-54 0~255
Sockets active F-57 0 = Disable, 1 = Enable
Web Server active F-59 0 = Disable, 1 = Enable
Web password active F-60 0 = Disable, 1 = Enable
Web setting password F-61 0000~9999
Power On Configuration Settings*

0 = Panel control (local)
1 = External voltage control

CV Control

F-90

2 = External resistance control

(Ext-R

10kΩ = Vo, max)

3 = External resistance control

(Ext-R

10kΩ = 0)
0 = Panel control (local)
1 = External voltage control

CC Control F-91

2 = External resistance control

(Ext-R

10kΩ = Io,max)
3 = External resistance control

(Ext-R

10kΩ = 0)

Power-ON Output F-92 0 = OFF at startup, 1 = On at startup

0 = Master/Local
1 = Master/Parallel1

Master/Slave F-93

2 = Master/Parallel2
3 = Slave/Parallel
4 = Slave/Series

External Out Logic F-94 0 = High ON, 1 = Low ON
Power Switch trip F-95 0 = Enable , 1 = Disable
Calibration Settings*
Calibration F-00 0000 ~ 9999

*Note

Power On and Calibration settings can only be set
during power up.

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PSW Series User Manual

Normal Function Settings

Output ON Delay
Time

Delays turning the output on for a designated
amount of time. The Delay indicator will light
when the Delay time is not 0.

F-01 0.00s~99.99s

Output OFF
Delay Time

F-02 0.00s~99.99s

V-I Mode

Delays turning the output off for a designated
amount of time. The Delay indicator will light
when the Delay time is not 0.

Selects High Speed Priority, or Slew Rate
Priority CV or CC mode. The voltage or current
slew rate can only be edited if CC/CV Slew
Rate Priority is selected. The ISR indicator will
be lit for CC Slew Rate Priority and the VSR
indicator will be lit for CV Slew Rate Priority.

78

CONFIGURATION

F-03 0 = CV high speed priority

1 = CC high speed priority
2 = CV slew rate priority
3 = CC slew rate priority

Rising Voltage
Slew Rate

Falling Voltage
Slew Rate

Rising Current
Slew Rate

Falling Current
Slew Rate

Sets the rising voltage slew rate. Only
applicable if V-I Mode is set to CV Slew Rate
Priority.

F-04 0.01V/s~60V/s (PSW 30-XX)

0.1V/s~160V/s (PSW 80-XX)

Sets the falling voltage slew rate. Only
applicable if V-I Mode is set to CV Slew Rate
Priority.

F-05 0.01V/s~60V/s (PSW 30-XX)

0.1V/s~160V/s (PSW 80-XX)

Sets the rising current slew rate. Only
applicable if V-I Mode is set to CC Slew Rate
Priority.

F-06 0.01A/s~72.00A/s (PSW 30-36)

0.1A/s~144.0A/s (PSW 30-72)

0.1A/s~216.0A/s (PSW 30-108)

0.01A/s~27.00A/s (PSW 80-13.5)

0.01A/s~54.00A/s (PSW 80-27)

0.01A/s~81.00A/s (PSW 80-40.5)

Sets the falling current slew rate. Only
applicable if V-I Mode is set to CC Slew Rate
Priority.

F-07 0.01A/s~72.00A/s (PSW 30-36)

0.1A/s~144.0A/s (PSW 30-72)

0.1A/s~216.0A/s (PSW 30-108)

0.01A/s~27.00A/s (PSW 80-13.5)

0.01A/s~54.00A/s (PSW 80-27)

0.01A/s~81.00A/s (PSW 80-40.5)

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PSW Series User Manual

Internal
Resistance
Settings

Bleeder Control

Sets the internal resistance of the power supply.

F-08

Bleeder control turns ON/OFF the bleeder
resistor. Bleeder resistors discharge the filter
capacitors after power is turned off as a safety
measure.

Ω~0.833Ω (PSW 30-36)

0.000

0.000

Ω ~0.417Ω (PSW 30-72)
Ω ~0.278Ω (PSW 30-108)

0.000

0.000

Ω ~5.926Ω (PSW 80-13.5)
Ω ~2.963Ω (PSW 80-27)

0.000

0.000

Ω ~1.975Ω (PSW 80-40.5)

F-09 0 = OFF, 1 = ON

Buzzer ON/OFF

Turns the buzzer sound on or off. The buzzer is
associated with alarm sounds and keypad entry
sounds.

F-10 0 = ON, 1 = OFF

USB/GPIB Settings

Front Panel USB
State

Displays the front panel USB-A port state. This
setting is not configurable.

F-20 0 = Absent, 1 = Mass Storage

Rear Panel USB
State

Rear Panel USB
Mode

Displays the rear panel USB-B port state. This
setting is not configurable.

F-21

Sets the rear panel USB mode.

0 = Absent, 2 = USB-CDC,
3 = GPIB-USB adapter

0 = Disable, 1 = GPIB-USB

F-22

adapter (for GUG-001),
2 = USB CDC

GPIB Address

Sets the GPIB address.

F-23 0~30

80

LAN Settings

CONFIGURATION

MAC Address­1~6

Displays the MAC address 1~6. This setting is
not configurable.

F-30~F-35 0x00~0xFF

LAN

Turns Ethernet on or off.

F-36 0 = Disable, 1 = Enable

DHCP

Turns DHCP on or off.

F-37 0 = Disable, 1 = Enable

IP Address-1~4

Sets the default IP address. IP address 1~4
splits the IP address into four sections.

(F-39 : F-40 : F-41 : F-42)

(0~255 : 0~255 : 0~255 : 0~255)

Subnet Mask 1~4

Sets the subnet mask. The subnet mask is split
into four parts.

(F-43 : F-44 : F-45: F-46)

(0~255 : 0~255 : 0~255 : 0~255)

Gateway 1~4

Sets the gateway address. The gateway address
is split into 4 parts.

(F-47 : F-48 : F-49 : F-50)

(0~255 : 0~255 : 0~255 : 0~255)

DNS Address 1~4

Sockets active

Sets the DNS address. The DNS address is split
into 4 parts.

(F-51 : F-52 : F-53 : F-54)
(0~255 : 0~255 : 0~255 : 0~255)

Enables WebSocket connections.

F-57 0 = Disable, 1 = Enable

Web server active

Turns Web server control on/off.

F-59 0 = Disable, 1 = Enable

81

PSW Series User Manual

Web Password

Turns a web password on/off.

active
F-60 0 = Disable, 1 = Enable

Web Password

Sets the Web password.

F-61 0000 ~ 9999

82

CONFIGURATION

Power On Configuration Settings

CV Control

CC Control

Sets the constant voltage (CV) control mode
between local and external voltage/resistance
control. For external voltage control, see page
91 (External Voltage Control of Voltage Output)
and page 95 (External Resistance Control of
Voltage Output).

F-90 0= Panel control (local)

1 = External voltage control
2 = External resistance control
(Ext-R

10kΩ = Vo,max)

3 = External resistance control
(Ext-R

Sets the constant current (CC) control mode
between local and external voltage/resistance
control. For details on external voltage control,
see page 93 (External Voltage Control of
Current Output) and 97 (External Resistance
Control of Current Output).

10kΩ = 0)

F-91 0= Panel control (local)

1 = External voltage control
2 = External resistance control
(Ext-R

10kΩ = Io,max)

3 = External resistance control
(Ext-R

10kΩ = 0)

Power-ON
Output

Master/Slave

Sets the power supply to turn the output on or
off at power up.

F-92 0 = OFF at startup, 1 = On at

start up

Sets the power supply as master or slave. See
the parallel/series operation for details, page

54.

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PSW Series User Manual

F-93 0 = Master/Local

1 = Master/Parallel1
2 = Master/Parallel2
3 = Slave/Parallel
4 = Slave/Series

External Out
Logic

Power Switch Trip

Sets the external logic as active high or low.

F-94 0= High ON, 1 = Low ON

Turns the power off if enabled when the
protection settings are tripped.

F-95 1 = Disable, 0 = Enable

Calibration

Programmable
Calibration

The calibration password is used to access the
local mode calibration or other special
functions. The password used determines
which function is accessed. Please see your
distributor for details.

F-00 0000 ~ 9999

Setting Normal Function Settings

The normal configuration settings (F-01~F-61)
can be easily changed with the Function key.

 Ensure the load is not connected.
 Ensure the output is off.

Configuration settings F-90~F-95 cannot be edited

Note

in the Normal Function Settings. Use the Power
On Configuration Settings. See page 86 for details.

1. Press the Function key. The
function key will light up.

84

CONFIGURATION

2. The display will show F-01
on the top and the
configuration setting for
F-01 on the bottom.

3. Rotate the voltage knob to change
the F setting.

Range

4. Use the current knob to set the

F-00~ F-95

parameter for the chosen F setting.

5. Press the Voltage knob to save the
configuration setting. Save will be
displayed when successful.

Exit

Press the Function key again to exit
the configuration settings. The
function key light will turn off.

Voltage

Current

85

PSW Series User Manual

Setting Power On Configuration Settings

The Power On configuration settings can only
be changed during power up to prevent the
configuration settings being inadvertently
changed.

 Ensure the load is not connected.
 Ensure the power supply is off.

1. Hold the Function key whilst
turning the power on.

2. The display will show F-90 on the
top and the configuration setting
for F-90 on the bottom.

3. Rotate the voltage knob to change
the F setting.

Range

F-90~ F-95

Multi-Range DC Power Supply

PSW 30-36 360W

VSR
C V

RMT
ALM
DLY

C C
ISR

Function OVP/OCP Set

PWR DSPLLock/LocalTest

Voltage

W

V

%W10080604020

Current

W

A

Output

4. Use the current knob to set the
parameter for the chosen F setting.

86

CONFIGURATION

Exit

5. Press the Voltage knob to save the
configuration setting. ConF will be
displayed when successful.

Cycle the power to save and exit the
configuration settings.

Voltage

87

PSW Series User Manual

A

ANALOG CONTROL

The Analog Control chapter describes how to
control the voltage or current output using an
external voltage or resistance, monitor the
voltage or current output as well as remotely
turning off the output or shutting down the
power supply.

Analog Remote Control Overview .................................... 89

nalog Control Connector Overview ................................................................... 89

External Voltage Control of Voltage Output ...................................................... 91

External Voltage Control of Current Output ...................................................... 93

External Resistance Control of Voltage Output ................................................. 95

External Resistance Control of Current Output ................................................. 97

External Control of Output ................................................................................... 99

External control of Shutdown ............................................................................. 102

Remote Monitoring ........................................................ 104

External Voltage and Current Monitoring ......................................................... 104

External Operation and Status Monitoring ........................................................ 106

88

ANALOG CONTROL

Analog Remote Control Overview

The PSW power supply series have a number of analog control
options. The Analog Control connectors are used to control output
voltage and current using external voltage or resistance. The power
supply output and power switch can also be controlled using
external switches.

 Analog Control connector overview → from page 89
 External voltage control of voltage output → from page 91
 External voltage control of current output → from page 93
 External resistance control of voltage output → from page 95
 External resistance control of current output → from page 97
 External control of output → from page 99
 External control of the power switch → from page 102

Analog Control Connector Overview

Overview

The Analog Control Connector is a standard
Mil 26 pin connector (OMRON XG4 IDC plug).
The connector is used for all analog remote
control. The pins used determine what remote
control mode is used.

To prevent electric shock, ensure that the cover for

WARNING

the Analog Control Connector is used when the
connector is not in use.

Pin Assignment

Pin name Pin number Description
Current Share 1 Used when operating 2 or more units in parallel.

89

PSW Series User Manual

D COM 2 Connected to the (–S) sense- terminal when

remote sense is used. Connected to the negative

output terminal when remote sense is not used.
CURRENT SUM
OUT

3 Current sum output signal when used in parallel

mode.
EXT-V CV CONT 4 External voltage control of the voltage output. A

voltage of 0~10V is used to control the full scale

voltage output (0%~100%) of the instrument.
EXT-V CC CONT 5 External voltage control of the current output. A

voltage of 0~10V is used to control the full scale

current output (0%~100%)of the instrument
EXT-R CV CONT
PIN1

6 External resistance control of the voltage output. A

resistance of 0k

Ω ~ 10kΩ is used to control the full

scale voltage output (0%~100%) of the instrument.
EXT-R CV CONT
PIN2

7 External resistance control of the voltage output. A

resistance of 0k

Ω ~ 10kΩ is used to control the full

scale voltage output (0%~100%) of the instrument.
EXT-R CC CONT
PIN1

8 External resistance control of the current output. A

resistance of 0k

Ω ~ 10kΩ is used to control the full

scale current output (0%~100%) of the instrument.
EXT-R CC CONT
PIN2

9 External resistance control of the current output. A

resistance of 0k

Ω ~ 10kΩ is used to control the full

scale current output (0%~100%) of the instrument.
V MON 10 Voltage Monitor Output. Outputs the full scale

voltage (0~100%) as a voltage (0V~10V).
I MON 11 Current Monitor Output. Outputs the full scale

current (0~100%) as a voltage (0V~10V).
SHUTDOWN 12 The shut down signal will turn off the output or

power when a low TTL signal is applied. The

shutdown signal is pulled up to 5V with a 10k

Ω

pull-up resistor.
CURRENT_SUM_1 13 Master unit current sum input signal from first

slave CURRENT SUM OUTPUT. Used in parallel

mode only.
CURRENT_SUM_2 14 Master unit current sum input signal from second

slave CURRENT SUM OUTPUT. Used in parallel

mode only.
FEEDBACK 15 Parallel control signal during master-slave parallel

operation.

90

ANALOG CONTROL

A COM 16 Analog signal common. Connected to the sense-

terminal when remote sense is used. Connected to
the negative output terminal when remote sense is

not used.
STATUS COM 17 Common for status signals 18, 19, 20, 21 and 22.
CV STATUS 18 Turns on when CV mode is active. (photo coupled

open collector output)
CC STATUS 19 Turns on when CC mode is active. (photo coupled

open collector output)
ALM STATUS 20 Turns on when any of the protection modes are

tripped (OVP, OCP) or if a shutdown signal is

input. (photo coupled open collector output)
OUTPUT ON
STATUS
POWER OFF

21 Turns on when the output has been turned on.

(photo coupled open collector output)

22 Turns on when the power switch is turned off.
STATUS
DETECT IN 23 Input to detect for series/parallel mode

connection.
OUT ON/OFF
CONT

24 Turns the output on/off when (default setting) a

low TTL signal is applied. Internally, the circuit is

pulled up to +5V with 10k

Ω resistance.

SER SLV IN 25 Series slave input during master-slave series

operation.
DETECT OUT 26 Input to detect for series/parallel connection.

External Voltage Control of Voltage Output

Description

External voltage control of the voltage output is

accomplished using the MIL-26 connector on

the rear panel. A voltage of 0~10V is used to

control the full scale voltage of the instrument,

where:

Output voltage = full scale voltage × (external

voltage/10)

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PSW Series User Manual

Connection

Connection- alt.
shielding

When connecting the external voltage source to
the MIL connectors, use shielded or twisted
paired wiring.

 Pin16 → EXT-V (-)
 Pin4 → EXT-V (+)
 Wire shield → negative (-) output terminal

If the wire shield needs to be grounded at the
voltage source (EXT-V), then the shield cannot
also be grounded at the negative (-) terminal
output of the PSW power supply. This would
short the output.

Panel operation

92

 Pin16 → EXT-V(-)
 Pin4 → EXT-V(+)
 Wire shield → EXT-V ground (GND)

1. Connect the external voltage according to the
connection diagrams above.

ANALOG CONTROL

Note

CAUTION

2. Set the F-90 power on

Page 86
configuration setting to 1 (CV
control – Ext voltage).

 Be sure to cycle the power after the power

on configuration has been set.

3. Press the Function key and confirm
the new configuration settings (F­90=1).

4. Press the Output key. The voltage
can now be controlled with the
External voltage.

The input impedance for external voltage control is
10k

Ω.

Use a stable voltage supply for the external voltage
control.

Ensure no more than 10.5 volts are input into the
external voltage input.

Ensure the voltage polarity is correct when
connecting the external voltage.

External Voltage Control of Current Output

Description

External voltage control of the current output is
accomplished using the MIL-26 connector on
the rear panel. A voltage of 0~10V is used to
control the full scale current of the instrument,
where:

Output current = full scale current × (external
voltage/10)

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PSW Series User Manual

Connection

Connection- alt.
shielding

When connecting the external voltage source to
the MIL connectors, use shielded or twisted
paired wiring.

 Pin16 → EXT-V (-)
 Pin5 → EXT-V (+)
 Wire shield → negative (-) output terminal

If the wire shield needs to be grounded at the
voltage source (EXT-V), then the shield cannot
also be grounded at the negative (-) terminal
output of the PSW power supply. This would
short the output.

Panel operation

94

 Pin16 → EXT-V (-)
 Pin5 → EXT-V (+)
 Wire shield → EXT-V ground (GND)

1. Connect the external voltage according to the
connection diagrams above.

ANALOG CONTROL

Note

CAUTION

2. Set the F-91 power on

Page 86
configuration setting to 1 (CC
control – Ext voltage).

 Be sure to cycle the power after the power

on configuration has been set.

3. Press the Function key and confirm
the new configuration settings (F­91=1).

4. Press the Output key. The current
can now be controlled with the
External voltage.

The input impedance for external voltage control is
10k

Ω.

Use a stable voltage supply for the external voltage
control.

Ensure the voltage polarity is correct when
connecting the external voltage.

Ensure no more than 10.5 volts are input into the
external voltage input.

External Resistance Control of Voltage Output

Description

External resistance control of the voltage output
is accomplished using the MIL-26 connector on
the rear panel. A resistance of 0kΩ~10kΩ is
used to control the full scale voltage of the
instrument.

The output voltage (0 to full scale) can be
controlled with the external resistance going up
(Ext-R

) 0kΩ~10kΩ(10kΩ = Vo,max) or down

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PSW Series User Manual

Note

Connection

(Ext-R

) 10kΩ~0kΩ(10kΩ = 0).

For 0kΩ~10kΩ: Output voltage = full scale
voltage × (external resistance/10)

For 10kΩ~0kΩ: Output voltage = full scale
voltage × ([10-external resistance]/10)

The Ext-R

configuration is recommended for
safety reasons. In the event that the cables become
accidentaly disconnected, the voltage output will
drop to zero. Under similar circumstances using
Ext-R

, an unexpected high voltage would be

output.

If swtiches are used to switch between fixed
resistances, use switches that avoid creating open
circuits. Use short-circuit or continous resistance

pair

PSWEXT-R

6

Analog

connector

7

Output

Terminal

switches.

2 core shielded

wire or twisted

 Pin6 → EXT-R
 Pin7 → EXT-R
 Wire shield → negative (-) output terminal

Panel operation

1. Connect the external resistance according to the
connection diagrams above.

2. Set the F-90 (CV Control)

Page 86
configuration settings to 2 for Ext­R

or 3 for Ext-R .

 Be sure to cycle the power after the power

96

on configuration has been set.

ANALOG CONTROL

3. Press the Function key and confirm
the new configuration settings (F­90=2 or 3).

4. Press the Output key. The voltage
can now be controlled with the
External resistance.

Ensure the resistor(s) and cables used exceed the

Note

isolation voltage of the power supply. For example:
insulation tubes with a withstand voltage higher
than the power supply can be used.

When choosing an external resistor ensure the
resistor can withstand a high degree of heat.

External Resistance Control of Current Output

Description

External resistance control of the current output is
accomplished using the MIL-26 connector on the
rear panel. A resistance of 0k

Ω~10kΩ is used to

control the full scale current of the instrument.

The output current (0 to full scale) can be
controlled with the external resistance going up
(Ext-R
(Ext-R

For 0k

) 0kΩ~10kΩ(10kΩ = Vo,max) or down

) 10kΩ~0kΩ(10kΩ = 0).

Ω~10kΩ: Output current = full scale current

× (external resistance/10)

For 10k

Ω~0kΩ: Output current = full scale current

× ([10-external resistance]/10)

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PSW Series User Manual

Note

Connection

The Ext-R

configuration is recommended for
safety reasons. In the event that the cables become
accidentaly disconnected, the current output will
drop to zero. Under similar circumstances using
Ext-R

, an unexpected high current would be

output.

If swtiches are used to switch between fixed
resistances, use switches that avoid creating open
circuits. Use short-circuit or continous resistance

pair

PSWEXT-R

9

Analog

connector

8

Output

Terminal

switches.

2 core shielded

wire or twisted

 Pin9 → EXT-R
 Pin8 → EXT-R
 Wire shield → negative (-) output terminal

Panel operation

1. Connect the external resistance according to the
connection diagrams above.

1. Set the F-91 (CC Control)

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configuration settings to 2 for Ext­R

or 3 for Ext-R .

 Be sure to cycle the power after the power

on configuration has been set.

2. Press the Function key and confirm
the new configuration settings (F­91=2 or 3).

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ANALOG CONTROL

3. Press the Output key. The current
can now be controlled with the
External resistance.

Ensure the resistor(s) and cables used exceed the

Note

isolation voltage of the power supply. For example:
insulation tubes with a withstand voltage higher
than the power supply can be used.

When choosing an external resistor ensure the
resistor can withstand a high degree of heat.

External Control of Output

Description

The output can be turned on or off externally
using a switch. The analog control connector
can be set to turn the output on from a high or
low signal. The voltage across pins 2 and 24 are
internally pulled to +5V ±5% @ 500uA with
10kΩ pull-up resistor. A short (closed switch)
produces a low signal.

When set to High = On, the output is turned on
when the pins 2-24 are open.

When Low = On, the output is turned on when
pins 2-24 are shorted.

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Connection

PSW Series User Manual

Panel operation

 Pin2 → Switch
 Pin24 → Switch
 Wire shield → negative (-) output terminal

1. Connect the external switch according to the
connection diagrams above.

Set F-94 (External output logic) in

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the power on configuration
settings to 0 (High = On) or 1
(Low = On).

 Be sure to cycle the power after

setting the power on
configuration settings.

2. Press the Function key and confirm
the new configuration settings.

3. The switch is now ready to set the output on or
off.

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