GW Instek PPX Series Owner's manual

Programmable High Precision DC
Power Supply
PPX Series
PROGRAMMING MANUAL
Rev. A
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.

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS .................................................. 4
GETTING STARTED.......................................................... 7
PPX Series Overview ..............................8
Appearance .......................................... 11
Theory of Operation ............................. 19
REMOTE CONTROL ....................................................... 29
Interface Configuration ........................ 31
Socket Server Examples ....................... 64
Command Syntax ................................. 68
Command List ..................................... 72
Status Register Overview ................... 130
Error List ........................................... 142
APPENDIX ....................................................................151
PPX Series Default Settings ............... 151
INDEX ..........................................................................154

PPX Series Programming Manual
4
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
Warning: Identifies conditions or practices that
could result in injury or loss of life.
CAUTION
Caution: Identifies conditions or practices that
could result in damage to the PPX or to other
properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal

SAFETY INSTRUCTIONS
5
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
Do not place any heavy object on the PPX.
Avoid severe impact or rough handling that
leads to damaging the PPX.
Do not discharge static electricity to the PPX.
Use only mating connectors, not bare wires, for
the terminals.
Do not disassemble the PPX unless you are
qualified.
Power Supply
CAUTION
WARNING
AC Input Voltage:
100Vac/120Vac/220Vac/240Vac, 50Hz/60Hz,
single phase
Frequency: 47Hz to 63Hz
Before connecting the power plug to an AC line
outlet, make sure the voltage selector switches
of the bottom panel in the correct position.
Disconnect power cord and test leads before
replacing fuse.
The fuse specification is as following:
To avoid electrical shock connect the protective
grounding conductor of the AC power cord to
an earth ground.

PPX Series Programming Manual
6
Cleaning the PPX
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.
Operation
Environment
Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
Relative Humidity: 20%~ 80% (no condensation)
Altitude: < 2000m
Temperature: 0°C to 40°C
(Pollution Degree) EN61010-1:2010 specifies the pollution degrees
and their requirements as follows. The PPX 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.
Storage
environment
Location: Indoor
Temperature: -20°C to 70°C
Relative Humidity: 20 to 85%(no condensation)
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.

GETTING STARTED
7
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.
PPX Series Overview ............................................... 8
Series lineup.................................................................................................8
Main Features..............................................................................................8
Accessories ..................................................................................................9
Appearance ............................................................. 11
Front Panel ..................................................................................................11
Display Area ................................................................................................15
Rear Panel ....................................................................................................17
Theory of Operation ................................................ 19
Operating Description...............................................................................19
CC and CV Mode.......................................................................................20
Slew Rate......................................................................................................21
Bleeder Control...........................................................................................22
Alarms ..........................................................................................................23
Considerations ............................................................................................24
Grounding ...................................................................................................27

PPX Series Programming Manual
8
PPX Series Overview
Series lineup
The PPX series consists of 6 models, covering a number of different
current, voltage and power capacities:
Model name
Operation Voltage
Operation Current
Rated Power
PPX-1005
0-10V
0-5A
50W
PPX-2002
0-20V
0-2A
40W
PPX-2005
0-20V
0-5A
100W
PPX-3601
0-36V
0-1A
36W
PPX-3603
0-36V
0-3A
108W
PPX-10H01
0-100V
0-1A
100W
Main Features
Features
2.4" TFT-LCD Panel.
Preset memory function.
Output ON/OFF delay function.
CV, CC priority start function. (prevents
overshoot with output ON)
Adjustable voltage and current slew rates.
Bleeder circuit ON/OFF setting. (to prevent
over-discharging of batteries)
OVP, OCP, AC Alarm and OTP protection.
Supports test sequence.
Web server monitoring and control. (The
function is activated when connecting to LAN
Interface)
Analog monitor output.

GETTING STARTED
9
Remote sensing to compensate for voltage drop
in load leads.
Support K type thermocouple temperature
measurement.
With 4 measuring currents and Manual / Auto
shift function.
Interface
Built-in USB, RS-232/485 and LAN interface.
External analog control function.
Optional GPIB interface.
Accessories
Before using the PPX power supply unit, check the package
contents to make sure all the standard accessories are included.
Standard
Accessories
Part number
Description
Qty.
CD-ROM
User manual, Programming manual
1
Power Cord
1
GTL-104A
Test leads for PPX-1005/PPX-
2005/PPX-3603 (Binding Posts
Terminal), 1m, 10A
1
GTL-105A
Test leads for PPX-2002/PPX-3601,
1m, 3A
1
Short Bar (Binding Posts Terminal)
1
GTL-204A
Test leads for PPX-1005/PPX-
2005/PPX-3603 (European Type Jack
Terminal), 1m, 10A
1
GTL-203A
Test leads for PPX-2002/PPX-
3601/PPX-10H01 (European Type Jack
Terminal), 1m, 3A
1
GTL-201A
Ground lead for European Type Jack
Terminal
1

PPX Series Programming Manual
10
Optional
Accessories
Part number
Description
GRA-441-J
Rack for PPX (JIS)
GRA-441-E
Rack for PPX (EIA)
GTL-205A
Temperature probe adaptor with
thermocouple K type
GTL-246
USB Cable (USB 2.0 Type A- Type B Cable,
4P)
GTL-258
GPIB Cable, 2000mm
GTL-259
RS232 cable with DB9 connector to RJ45
GTL-260
RS485 cable with DB9 connector to RJ45
GTL-262
RS485 slave cable
Factory Installed
Options
Part number
Description
Option 1
GPIB interface

GETTING STARTED
11
Appearance
Front Panel
12
3
4
5
67
8
9
10
11
12
14
15
13
16
1.
Display
Button
Used to switch among 4 different
display modes.
2.
Knob Key
Used to navigate menu, and to
configure or confirm
voltage/current/time values, among
others. Also, the indicator on the
upper-right corner shows current state
and power mode.

PPX Series Programming Manual
12
3.
Left/Right
Arrow Keys
Used to select a parameter number in
the Function settings. Also the left
arrow key can be used as backspace.
4.
Menu Button
Used to enter the Menu page.
M1 Button
(+Shift) Used to recall the M1 setup.
5.
Test Button
Used to run customized test sequence.
M2 Button
(+Shift) Used to recall the M2 setup.
6.
D-Log Button
Used to run data log function.
M3 Button
(+Shift) Used to recall the M3 setup.
7.
PROT Button
Used to set OVP, OCP and UVL
protecting functions.
ALM_CLR
Button
+
(+Shift) Used to release protection
functions that have been activated.
The tripped protection alarms include
the following: OVP Alarm, OCP
Alarm, OTP Alarm, AC Alarm, Sense
Alarm, WDOG Alarm, Ah CAP
Alarm, Wh CAP Alarm, TEMP Short
Alarm, TEMP Monitor Alarm.
8.
Shift Button
Used to enable the functions that are
written in blue characters above
certain buttons.
9.
Lock Button
Used to lock all front panel buttons
other than the Output Button.
Unlock/Local
Button
(+Shift) Used to unlock the front panel
buttons or it switches to local mode.

GETTING STARTED
13
10.
Output
Button
Used to turn the output on or off.
11.
USB A Port
USB A port for data transfer, loading
test scripts and firmware update.
12.
TC Input
Terminal to connect the K type
thermocouple cable for temperature
measurement.
13.
Sensing
Terminal
Terminal to connect the sensing
cables, which compensate voltage
drop occurred in load leads.
14.
Power Switch
Used to turn the power on/off.
15.
Output
terminal
DC output terminal for
PPX is European Type
Jack Terminal.
PPX-10H01 the max.
output is 100V/1A/100W
DC output terminal for
PPX is Binding Posts
Terminal or European
Type Jack Terminal.
PPX-1005 the max. output
is 10V/5A/50W

PPX Series Programming Manual
14
DC output terminal for
PPX is Binding Posts
Terminal or European
Type Jack Terminal.
PPX-2002 the max. output
is 20V/2A/40W
DC output terminal for
PPX is Binding Posts
Terminal or European
Type Jack Terminal.
PPX-2005 the max. output
is 20V/5A/100W
DC output terminal for
PPX is Binding Posts
Terminal or European
Type Jack Terminal.
PPX-3601 the max. output
is 36V/1A/36W
DC output terminal for
PPX is Binding Posts
Terminal or European
Type Jack Terminal.
PPX-3603 the max. output
is 36V/3A/108W
16
Display Area
The display area shows set values, output values
and parameter settings.

GETTING STARTED
15
Display Area
1
2
3
4
5 6
7
8
9
10
17
16 15
14 12
13
11
1
2
3
4
5 6
7
10
17
16 15
14 12
13
11
1.
2Wire/4Wire
2-wire or 4-wire indicator.
2.
Voltage Meter
Displays the voltage.
3.
Current Meter
Displays the current.
4.
V/A Set
Guidance
The scrolling symbol indicates to select
between V and A set via scrolling knob key.
External CC &
CV Control
When the external CC or CV control is
activated, the indicator(s) will be shown.
5.
V Set
Manually sets voltage.
6.
I(A) Set
Manually sets current.
7.
Dlog Icon
When Data Logger is enabled, the icon will be
shown accordingly. Note that when SEQ
appears, the icon will be faded out.
SEQ
When Sequence function is turned On, the icon
will be shown accordingly.

PPX Series Programming Manual
16
8.
DLY Icon
When Output On/Off Dly is enabled, the icon
will be shown accordingly. Note that when
SEQ appears, the icon will be faded out.
9.
VSR/ISR
Icon
When CV/CC Slew Rate Priority (CVLS/CCLS)
is activated, the icon will be shown. Note that
when SEQ appears, the icon will be faded out.
10.
CC/CV/UR
indicator
It shows when constant voltage or constant
current mode is ongoing. However, when output
is unregulated, which means neither in CV mode
nor CC mode, it shows UR instead. If it is not
under power output, it simply shows Off.
11.
LAN Indicator
When PPX series connects to LAN network, the
icon will be shown.
12.
Remote Control
Indicator
When remote control (USB/LAN/GPIB,
UART) is underway, the icon will be shown.
13.
USB Indicator
When USB disk is inserted into the front panel
of PPX series, the icon will be shown.
14.
External Output
Indicator
When external output enable is turned On, the
icon will be shown.
15.
Lock Indicator
When the lock mode is activated, the icon will
be shown.
16.
Communication
Monitor
Indicator
When communication monitor is enabled, the
icon will be shown.
17.
Error Indicator
When error occurs from command of remote
control, the icon will be shown.

GETTING STARTED
17
Rear Panel
5
2
1
3
4
6
7
8
1.
Remote-OUT
RJ-45 connector that is used to daisy chain power
supplies with the Remote-IN port to form a
communication bus.
2.
Remote-IN
Two different types of cables can be used for
RS232 or RS485-based remote control.
PSU-232: RS232 cable with DB9 connector kit.
PSU-485: RS485 cable with DB9 connector kit.
3.
LAN
Ethernet port for controlling the PPX remotely
4.
USB
USB port for controlling the PPX remotely.

PPX Series Programming Manual
18
5.
GPIB
GPIB connector for units equipped with IEEE
programming option. (Factory Installed Options)
6.
EXT I/O
External analog remote control connector.
7.
Line Voltage
Input
AC inlet.
8.
AC Select
Switch
The AC selector is located at the
bottom side of the unit.
Switch Voltage to 100V, 120V,
220V or 240V.

GETTING STARTED
19
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 Description
Background
The PPX power supplies are regulated DC
power supplies with a stable voltage and
current output. These operate within a switch
automatically between constant voltage and
constant current according to changes in the
load.
Suitable supply cord set for use with the equipment:
Mains plug: shall be national approval
Mains connector: C13 type
Cable:
1. Length of power supply cord: less
than 3m
2. Cross-section of conductors: at least
0.75mm2
3. Cord type: shall meet the
requirements of IEC 60227 or IEC
60245 (e.g.: H05VV-F, H05RN-F)
Caution
If the equipment is used in a manner not specified
by the manufacturer, the protection provided by
the equipment may be impaired.

PPX Series Programming Manual
20
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
set current limit (ISET) can no longer be
sustained 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 (VSET), the
load resistance (RL) and the critical resistance
(RC). The critical resistance is determined by
VSET/ISET. The power supply 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 VSET voltage
but the current will be less than ISET. If the load
resistance is reduced to the point that the
current output reaches the ISET level, the power
supply switches to CC mode.