GW Instek PSU Series User manual

Programmable DC Power Supply
PSU Series
USER MANUAL
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 .................................................. 5
GETTING STARTED.......................................................... 9
PSU Series Overview ............................ 10
Appearance .......................................... 15
Theory of Operation ............................. 23
OPERATION .................................................................. 36
Set Up.................................................. 38
Basic Operation ................................... 54
Parallel / Series Operation ................... 72
Test Scripts .......................................... 91
CONFIGURATION.......................................................... 99
Configuration Overview ..................... 100
ANALOG CONTROL......................................................123
Analog Remote Control Overview....... 124
Remote Monitoring ............................ 144
Isolated Analog Control Option ......... 152
COMMUNICATION INTERFACE ....................................169
Interface Configuration ...................... 170
FAQ..............................................................................199
APPENDIX ....................................................................201
PSU Factory Default Settings ............. 201
Error Messages & Messages .............. 204
LED ASCII Table Character Set ........... 205
PSU Specifications............................. 206

PSU Series User Manual
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PSU Dimensions ................................ 213
Declaration of Conformity .................. 214
INDEX ..........................................................................215

SAFETY INSTRUCTIONS
5
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 PSU or to other
properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal

PSU Series User Manual
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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 PSU.
Avoid severe impact or rough handling that
leads to damaging the PSU.
Do not discharge static electricity to the PSU.
Use only mating connectors, not bare wires, for
the terminals.
Do not block the cooling fan opening.
Do not disassemble the PSU unless you are
qualified.
(Measurement categories) EN61010-1:2010 and EN61010-2-030
specifies the measurement categories and their requirements as
follows. The PSU falls under category II.
Measurement category IV is for measurement performed at the
source of low-voltage installation.
Measurement category III is for measurement performed in the
building installation.
Measurement category II is for measurement performed on the
circuits directly connected to the low voltage installation.
0 is for measurements performed on circuits not directly
connected to Mains.
Power Supply
WARNING
AC Input voltage range: 85Vac~265Vac
Frequency: 47Hz to 63Hz
To avoid electrical shock connect the protective
grounding conductor of the AC power cord to
an earth ground.

SAFETY INSTRUCTIONS
7
Cleaning the PSU
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%~ 85% (no condensation)
Altitude: < 2000m
Temperature: 0°C to 50°C
(Pollution Degree) EN61010-1:2010 and EN61010-2-030 specifies
the pollution degrees and their requirements as follows. The PSU
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: -25°C to 70°C
Relative Humidity: ≤90%(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.

PSU Series User Manual
8
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 0.75mm2should be protected by a 3A or 5A fuse. Larger
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.

GETTING STARTED
9
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.
PSU Series Overview................................................ 10
Series lineup ......................................................................................10
Main Features ...................................................................................11
Accessories........................................................................................12
Appearance.............................................................. 15
PSU Series Front Panel................................................................... 15
PSU Series Display and Operation Panel ....................................18
Rear Panel.......................................................................................... 20
Theory of Operation ................................................ 23
Operating Area Description...........................................................23
CC and CV Mode ............................................................................24
Slew Rate ...........................................................................................26
Bleeder Control ................................................................................26
Internal Resistance...........................................................................27
Alarms................................................................................................29
Considerations..................................................................................31
Grounding.........................................................................................34

PSU Series User Manual
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PSU Series Overview
Series lineup
The PSU series consists of 10 models, covering a number of
different current, voltage and power capacities:
Model name
Voltage Rating1
Current Rating2
Power
PSU 6-200
6V
200A
1200W
PSU 12.5-120
12.5V
120A
1500W
PSU 20-76
20V
76A
1520W
PSU 40-38
40V
38A
1520W
PSU 60-25
60V
25A
1500W
PSU 100-15
100V
15A
1500W
PSU 150-10
150V
10A
1500W
PSU 300-5
300V
5A
1500W
PSU 400-3.8
400V
3.8A
1520W
PSU 600-2.6
600V
2.6A
1560W
1Minimum voltage guaranteed to 0.2% of rating voltage.
2Minimum current guaranteed to 0.4% of rating current.