Isotech IPS 3303D User manual

Instruction Manual
IPS X303 Series
DC Power Supply
EN
FR

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS............................................................ 5
OVERVIEW ................................................................................ 9
Introduction.............................................................9
Series Lineup / Main Features................................ 11
Principle of Operation ............................................12
CV/CC Crossover Characteristics...........................14
FRONT AND REAR PANELS...................................................... 15
Front Panel Overview ............................................15
Rear Panel Overview .............................................19
SETUP .................................................................................... 20
Power Up ..............................................................20
Load Cable Connection..........................................21
Output On/Off........................................................22
Beep On/Off ..........................................................22
Switch between channels.......................................23
Front Panel Lock ...................................................23
OPERATION ............................................................................ 24
CH1/CH2 Independent Mode..................................24
CH3 Independent Mode .........................................26
CH4 Independent Mode .........................................28
CH1/CH2 Tracking Series Mode .............................29
CH1/CH2 Tracking Parallel Mode ...........................34
SAVE/RECALL SETUP .............................................................. 36
Save Setup ...........................................................36
Recall Setup..........................................................37
REMOTE CONTROL ................................................................. 38
Remote Control Setup............................................38
Remote Connection Step........................................39

IPS X303 Series Instruction Manual
4
Command Syntax...................................................40
Error Messages .....................................................41
Command List........................................................42
Command Details...................................................43
APPENDIX ............................................................................... 48
Fuse Replacement .................................................48
SPECIFICATIONS..................................................................... 49
FAQ......................................................................................... 52
INDEX ..................................................................................... 53

SAFETY INSTRUCTIONS
5
SAFETY INSTRUCTIONS
This chapter contains important safety instructions that you must follow
when operating the IPS X303 series and when keeping it in storage.
Read the following before any operation to insure your safety and to
keep the best condition for the IPS X303 series.
Safety Symbols
These safety symbols may appear in this manual or on the IPS X303 series.
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 IPS X303 series or to other properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal

IPS X303 Series Instruction Manual
6
Safety Guidelines
General
Guidelines
CAUTION
Do not place any heavy object on the IPS X303 series.
Avoid severe impacts or rough handling that leads to damaging the
IPS X303 series.
Do not discharge static electricity to the IPS X303 series.
Do not block or obstruct the cooling fan vent opening.
Do not perform measurement at circuits directly connected to Mains
(see note below).
Do not disassemble the IPS X303 series unless you are qualified as
service personnel.
(Measurement categories) EN 61010-1:2001 specifies the measurement
categories and their requirements as follows. The IPS X303 series falls
under category I.
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.
Measurement category I is for measurements performed on circuits
not directly connected to Mains.
Power Supply
WARNING
AC Input voltage: 100V/120V/220V/230V ±10%, 50/60Hz
Connect the protective grounding conductor of the AC power cord to
an earth ground, to avoid electrical shock.
Fuse
WARNING
Fuse type: 100V/120V: T6.3A/250V, 220V/230V: T3.15A/250V
Make sure the correct type of fuse is installed before power up.
To ensure fire protection, replace the fuse only with the specified type
and rating.
Disconnect the power cord before fuse replacement.
Make sure the cause of fuse blowout is fixed before fuse replacement.
Cleaning the IPS
X303 series
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 or cleaners containing harsh products such as
benzene, toluene, xylene, and acetone.

SAFETY INSTRUCTIONS
7
Operation
Environment
Location: Indoor, no direct sunlight, dust free, almost non-conductive
pollution (note below)
Relative Humidity: < 80%
Altitude: < 2,000m
Temperature: 0 to 40°C
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees and
their requirements as follows. The IPS X303 series 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
Relative Humidity: < 70%
Temperature: −10 to 70°C

IPS X303 Series Instruction Manual
8
Power cord for the United Kingdom
When using the IPS X303 series 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 colours 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 the letter E or by the earth symbol or coloured Green or 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, cable of 0.75mm2should be protected by a 3A or 5Afuse. Larger conductors would
normally require 13A types, depending on the connection method used.
Any moulded mains connector that requires removal /replacement must be destroyed by
removal of any fuse & fuse carrier and disposed of immediately, as a plug with bared wires is
hazardous if a engaged in live socket. Any re-wiring must be carried out in accordance with
the information detailed on this label.

OVERVIEW
9
OVERVIEW
This chapter describes the IPS X303 series in a nutshell, including its
main features and front / rear panel introduction. After going through the
overview, follow the Setup chapter (page 20) to properly power up and
set operation environment.
Introduction
Overview
The IPS X303 regulated DC power supply series, are light weight,
adjustable, multifunctional work stations. The IPS 2303S has two
adjustable voltage outputs. The IPS 3303S has three independent
outputs: two with adjustable voltage level and one with fixed level
selectable from 2.5V, 3.3V and 5V. The IPS 4303S has four independent
voltage outputs that are all fully adjustable. The IPS X303 series can be
used for logic circuits where various output voltage or current are
needed, and for tracking mode definition systems where plus and minus
voltages with insignificant error are required.
Independent /
Tracking Series /
Tracking Parallel
The three output modes of IPS X303 series, independent, tracking
series, and tracking parallel, can be selected through pressing the
TRACKING key on the front panel. In the independent mode, the output
voltage and current of each channel are controlled separately. The
isolation degree, from output terminal to chassis or from output terminal
to output terminal, is 300V. In the tracking modes, both the CH1 and CH2
outputs are automatically connected in series or parallel; no need to
connect output leads. In the series mode, the output voltage is doubled;
in the parallel mode, the output current is doubled.

IPS X303 Series Instruction Manual
10
Constant Voltage/
Constant Current
Each output channel is completely transistorized and well-regulated, and
works in constant voltage (CV) or constant current (CC) mode. Even at
the maximum output current, a fully rated, continuously adjustable output
voltage is provided. For a big load, the power supply can be used as a
CV source; while for a small load, a CC source. When in the CV mode
(independent or tracking mode), output current (overload or short circuit)
can be controlled via the front panel. When in the CC mode (independent
mode only), the maximum (ceiling) output voltage can be controlled via
the front panel. The power supply will automatically cross over from CV
to CC operation when the output current reaches the target value. The
power supply will automatically cross over from CC to CV when the
output voltage reaches the target value. For more details about CV/CC
mode operation, see page 14.
Automatic tracking
mode
The front panel display (CH1, CH2) shows the output voltage or current.
When operating in the tracking mode, the power supply will automatically
connect to the auto- tracking mode.
Dynamic load
When used in audio production lines, the power supply will provide a
continuous or dynamic load using a jumper connector (JP101/JP401)..
When the connectors are connected to the position “ON”, a stable DC
current power will be provided for audio power amplifiers.

OVERVIEW
11
Series Lineup / Main Features
Series Lineup
Model
V Meter
A Meter
USB
Tracking Error
IPS 3303D
3 digit
3 digit
Yes
≤0.5% + 50mV of Master
IPS 2303S
5 digit
4 digit
Yes
≤0.5% + 10mV of Master
IPS 3303S
5 digit
4 digit
Yes
≤0.5% + 10mV of Master
IPS 4303S
5 digit
4 digit
Yes
≤0.5% + 10mV of Master
Main Features
Performance
Low noise: Cooling fan controlled by Heat sink temperature
Compact size, light weight
Operation
Constant Voltage / Constant Current operation
Tracking Series / Tracking parallel operation
Output On/Off control
Multi-output:
IPS 2303S: 30V/3A x2;
IPS 3303S: 30V/3A x2, 2.5V/3.3V/5V/3A x 1
IPS 4303S: 30V/3A x2, 5V/1Ax1, 5V/3A (10V/1A) x1
Digital panel control
4 sets of panel setup save/recall
Coarse and fine Voltage/Current control
Software calibration
Buzzer output
Key lock function
Protection
Overload protection
Reverse polarity protection
Interface
USB for remote control

IPS X303 Series Instruction Manual
12
Principle of Operation
Overview
The power supply consists of the following.
AC input circuit
Transformer
Bias power supply including rectifier, filter, pre-regulator and
reference voltage source
Main regulator circuit including the main rectifier and filter, series
regulator, current comparator, voltage comparator, reference voltage
amplifier, remote device and relay control circuit
The block diagram below shows the circuit arrangement. The single
phase input power is connected to the transformer through the input
circuit. Details of each part are described in the next page.
Block diagram
Voltage
Amplifier Voltage Comparator Series Regulator
Instant Over
Load
Protection
Current
Comparator
Reference
Voltage
Source
Auxiliary
Rectifier &
Filter
“OR” Gate Amplifier
Relay
Control
Main
Rectifier &
Filter
AC Input
Transformer
O/P
Rectifier
The auxiliary rectifiers D1011 to D1014 provide bias voltage filtered by
the capacitors C102 and C103, for the pre-regulators U101 and U102.
They provide a regulated voltage for other modules.
Main Rectifier
The main rectifier is a full wave bridge rectifier. It provides the power
after the rectifier is filtered by the capacitor C101, and then regulated via
a series-wound regulator, which is finally delivered to the output terminal.

OVERVIEW
13
Current Limiter
U104 acts as a current limiter. When the current is over predetermined
rating, U104 is activated and decreases the current. U208 provides a
reference voltage. U206 is the inverter amplifier. U103 is a comparator
amplifier which compares reference voltage and feedback voltage, and
then delivers to Q102, which then calibrates the output voltage.
Overload
When the unit is overloaded, Q107 activates to control the current
magnitude of Q102, to limit the output current. The relay control circuit
controls the power dissipation in the series-wound regulated circuit.

IPS X303 Series Instruction Manual
14
CV/CC Crossover Characteristics
Background
The IPS X303 series automatically switches between constant voltage
mode (CV) and constant current mode (CC), according to load condition.
CV mode
When the current level is smaller than the output setting, the IPS X303
series operates in Constant Voltage mode. The indicator on the front
panel turns green (C.V.) The Voltage level is kept at the setting and the
Current level fluctuates according to the load condition until it reaches
the output current setting.
CC mode
When the current level reaches the output setting, the IPS X303 series
starts operating in Constant Current mode. The indicator on the front
panel turns red (C.C.) The Current level is kept at the setting but the
Voltage level becomes lower than the setting, in order to suppress the
output power level from overload. When the current level becomes lower
than the setting, the IPS X303 series goes back to the Constant Voltage
mode.
Diagram
Vmax
Imax
Constant
Voltage
Constant
Current
Vout
Iout

FRONT AND REAR PANELS
15
FRONT AND REAR PANELS
Front Panel Overview
COARSE/ FINE
FINE
COARSE/ FINE
FINE
BEEP
UNLOCK
: Long Push
RECALL /
MEMORY
SAVE
VOLTAGE
Push
Push
CURRENT
1
2
3
4
LOCK
CH1/3
CH2/4
OUTPUT
/ INDEP
PARA
/ INDEP
SER
DC Power Supply
V
A
V
A
CH4 CH1CH2 CH3
C.V. C.C . PAR. C.V. C.C.
POWER
CH3
0 30V , 3A 0 30V , 3A
CH2 GND CH 1
SLAVE MASTER
SERIES OUTPUT COM
OUTPUTPARA
CH4
C.C.C.V.C.C.C.V.
0 5V , 1A 0 5V , 3A
5 10V , 1A
+
+
VoltMeter Ammeter Memory Keys
Voltage
Knobs
Current
Knobs
Parallel
Keys
CH1/CH3, CH2/
CH4(Beep) Keys
Output Key
Lock Key
CH3 CV/CC
Indicator
CH3 Output
CH1 CV/CC
Indicator
CH1 OutputCH2 Output
CH2 CV/CC/PAR
Indicator
CH4 Output
CH4 CV/CC
Indicator
GND Terminal
Series Keys
Power
Switch
Channel
Indicator
Display
Volt Meter
Displays output current of each channel.
IPS 4303S: CH1/CH3 and CH2/CH4
IPS 2303S/3303S: CH1 and CH2
IPS X303S (5 digits)
IPS 3303D (3 digits)

IPS X303 Series Instruction Manual
16
Amp Meter
Displays output current of each channel.
IPS 4303S: CH1/CH3 and CH2/CH4
IPS 2303S/3303S: CH1 and CH2
IPS X303S (4 digits)
IPS 3303D (3 digits)
Control Panel
Memory Keys
RECALL /
MEMORY
SAVE
1
2
3
4
Saves or recalls panel settings. Four settings, 1 to
4, are available. For save/recall details, see page
36.
CH1/CH2
CH1
CH2
BEEP
IPS 2303S/3303S: Selects the output channel
(CH1/CH2) for level adjustment. For level setting
details, see 22.
CH1/3 and
CH2/4
BEEP
CH1/3
CH2/4
IPS 4303S: Selects the output channel (CH1/3
and CH2/4) for level adjustment.
Beep Keys
BEEP
CH2/4
CH2
BEEP
Pressing and holding the CH2 (IPS 2303S/3303S)
or the CH2/4 key (IPS 4303S) enables the beeper
sound. For details, see page 22.
Parallel/Series
Keys
/INDEP
PARA
/INDEP
SER
Activates Tracking Parallel operation or Tracking
Series operation, For details, see page 28.
Lock Key
UNLOCK
LOCK
Locks or unlocks the front panel keys (excluding
the OUTPUT key). Pressing the LOCK key will
also exit remote mode if the machine is in remote
mode. For details, see page 23.

FRONT AND REAR PANELS
17
Output Key
OUTPUT
Turns the output on or off.
Voltage Knobs
COARSE/FINE
FINE
VOLTAGE
Push
Adjusts the output voltage level for the selected
channel. Pressing the knob switches coarse and
fine level setting.
Current Knobs
COARSE/FINE
FINE
Push
CURRENT
Adjusts the output current level for the selected
channel. Pressing the knob switches coarse and
fine level setting.
Power Switch
POWER
Turns On or Off the main power. For power up
sequence, see page 20.
Terminals
Default Terminals
European Terminals
GND Terminal
GND
Accepts a grounding wire.
CH1 Output
CH1 CV/CC
Indicator
C.V. C.C.
0 30V , 3A
CH1
MASTER
COM +
+
Indicates CH1 Constant Voltage or Constant
Current state.
CH1 Output
Outputs CH1 voltage and current.

IPS X303 Series Instruction Manual
18
CH2
CV/CC/PAR
Indicator
C.V. C.C. PAR.
0 30V , 3A
CH2
SLAVE
SERIES
Indicates CH2 Constant Voltage, Constant
Current, or Tracking Parallel operation mode.
CH2 Output
Outputs CH2 voltage and current.
CH3 Overload
Indicator
CH3
C.C.C.V.
0 5V , 3A
5 10V , 1A
Indicates CH3 Constant Voltage or Constant
Current state for the IPS 4303S.
CH3 Output
Outputs CH3 voltage and current.
CH3 Overload
Indicator
LOAD
OVER
Indicates when CH3 (IPS 3303S) output current is
overloaded.
CH3 Voltage
Selector
, 3A
3.3V2.5V 5V
Selects CH3 output voltage for the IPS 3303S:
2.5V, 3.3V, or 5V.
CH4 CV/CC
Indicator
CH4
C.C.C.V.
0 5V , 1A
Indicates CH4 constant voltage or constant
current for the IPS-4303S.
CH4 Output
Outputs CH4 voltage and current.
Channel
Indicator
COARSE/FINE
FINE
COARSE/FINE
FINE
BEEP
UNLOCK
: Long Push
RECALL /
MEMORY
SAVE
VOLTAGE
Push
Push
CURRENT
1
2
3
4
LOCK
CH1/3
CH2/4
OUTPUT
/INDEP
PARA
/INDEP
SER
DC Power Supply
V
A
V
A
CH4 CH1CH2 CH3
C.V. C.C. PAR. C.V. C.C.
POWER
CH3
0 30V , 3A 0 30V , 3A
CH2 GND CH1
SLAVE MASTER
SERIES OUTPUT COM
OUTPUT
PARA
CH4
C.C.C.V.C.C.C.V.
0 5V , 1A 0 5V , 3A
5 10V , 1A
+
+
Indicates which channel the 2 LED
voltmeters/ammeters represent.

FRONT AND REAR PANELS
19
Rear Panel Overview
SER. NO. LB
AC SELECTOR
230V220V100V
DISCONNECT POWER CORD
120V
WARNING
CONDUCTOR MUST BE CONNECTED TO GROUND.
FOR CONTINUED FIRE PROTECTION. REPLACE FUSE ONLY WITH 250V FUSE
NO OPERATOR SERVICEABLE COMPONENTS INSIDE. DO NOT REMOVE
COVERS. REFER SERVICING TO QUALIFIED PERSONNEL.
TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE GROUNDING
OF THE SPECIFIED TYPE AND RATING.
AC
T 6.3A
T 3.15A
250V
50/60 Hz
490 VA MAX
380 WATTS
250V120V
220V
230V
100V
FUSE RATING
REPLACE FUSE
AS SPECIFIED
BEFORE REPLACING FUSE
USBConnector ACSelectorCoolingFan PowerCord/
FuseSocket
USB Connector
Accepts a USB slave connector for command-based
remote control (page 38).
Power Cord / Fuse
Socket
The power cord socket accepts the AC mains:
115V/230V, 50/60Hz. For power up details, see page
20.
The fuse holder contains the AC main fuse. For fuse
replacement details, see page 48.
AC Selector
Selects AC voltage: 100V/ 120V/ 220V/ 230V.

IPS X303 Series Instruction Manual
20
SETUP
This chapter describes how to properly power up and configure the IPS
X303 series before operation.
Power Up
Select AC voltage
Before powering up the power supply, select the AC
input voltage from the rear panel.
Connect AC power
cord
Connect the AC power cord to the rear panel socket.
Power On
Press the Power switch to turn on the power. The
display shows the initialization screen with the
model name (IPS 3303S shown), followed by the
last recalled settings.
POWER
Power Off
Press the Power switch again to turn off the power.
POWER