Scientific DCX 400W Series User manual

Programmable Switch Mode
Power Supplies
DCX 400W series
User Manual

Copyright © Scientific All rights reserved.
Disclaimer
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Information in this manual supercede all corresponding previous released
material.
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all of the specifications, procedures, equipment at any time without notice.
Scientific shall not be liable errors contained in this document or if for incidental
or consequential damages in connection with the furnishing, performance or
use of this material.
Rev 1.02/ 0222
Scientific Mes-Technik Pvt. Ltd.,
B-14 Industrial Estate, Pologround,
Indore- 452015,
India
Tel : [phone]/33
Fax : [phone],561641
Email : [e-mail]
Website: www.scientificindia.com
2 User Manual DCX Series 400 W

Programmable Switch Mode Power Supplies
DCX Series 400 W
Table of Contents
Introduction 6
Safety instructions 7
Safety symbols 9
Chapter 1 Technical specifications 10
1.1 Specifications 10
1.2 Power supply outline drawings - dimension 14
Chapter 2 Panel controls 17
2.1 Front panel controls 17
2.2 Rear panel controls 19
2.3 Sockets, connector description used on rear panel 21
2.4 Connection diagram for interface cables 23
Chapter 3 Installation 25
3.1 AC Input mains connections 25
3.2 Cooling 25
3.3 Use of instrument on table top 26
3.4 Use of instrument in 19” Rack mounting cabinet 26
3.5 High Voltage Protection 27
3.6 First time operation power ON 28
3.6.1 AC mains input 28
3.6.2 Connecting to AC mains 28
3.6.3 DC output check 29
3.6.4 DC constant current check 29
Chapter 4 Descriptions 31
4.1 Safety first - grounding 31
4.2 Input Voltage 31
4.3 Operating conditions 31
User Manual DCX Series 400 W 3

User Manual DCX Series 400 W4
4.3.1 Temperature & humidity 31
4.3.2 Storage 32
4.4 Thermal protection 32
4.5 Cooling 32
4.6 Output 32
4.7 Connecting the load 34
4.8 Local & remote Sensing 35
4.9 Constant voltage and constant current mode 36
4.10 Hold up time 36
4.11 Over voltage protection 36
4.12 Under voltage limit 37
4.13 Fold back protection 37
4.14 AC fail 37
4.15 Analog programming 38
4.16 Description of analog connector pins and application 38
4.17 Safe start - auto start mode 42
4.18 Last save memory 42
4.19 Front panel locking 42
4.20 Remote control RS232 , RS485 42
4.21 Connecting load 42
4.22 Connecting power supplies in series and parallel 44
4.23 Power supply as battery charger 44
Chapter 5 Menu controls 45
5.1 Power ON switching 45
5.2 Voltage & Current setting 46
5.3 Over Voltage setting 46
5.4 Under Voltage setting 47
5.5 Fold back protection 47
5.6 Output On / OFF 47
5.7 Communication set menu 48
5.8 Front panel lock 50
Chapter 6 Communication interface protocol 51
6.1 SCPI Commands 51
6.2 Additional Control Commands 54

User Manual DCX Series 400 W 5
Chapter 6 Maintenance 59
6.1 Troubleshooting 59
Chapter 7 Dispatch procedure for service & Warranty 62
7.1 Dispatch procedure for service 62
7.2 Warranty 62

User Manual DCX Series 400 W6
Programmable Switch Mode Power Supply
DCX Series 400 W
Compact 2 U - 19” rack size
1/6th
Multi range Output
Fast transient response
High slew Rate
Interface USB, RS232 , RS485 , LAN
Universal Mains
The DCX Series 400 W power supplies are designed for compact 85 mm
height (2U) - in 19” Rack size with user friendly operation and higher
1/6th
efficiency. This range offer multi ranging output characteristic, which delivers
multiple voltage and current combination in a single power supply.
Transient response better than 100 us, ensures that the output of the power
supply recovers much faster and remains constant and oscillation free for
dynamic loads.
Power supplies can be remotely controlled & programmed through any of
interface analog programming , USB, Rs232, RS485 or Ethernet (LAN). Power
supplies can be programmed from 0 to full scale voltage and current. SCPI
compatible commands offer flexibility in programming and system integration.
With various protection features, over voltage protection, short circuit
protection, protects expensive loads circuits in testing.
The power supply unit can work on universal mains input range for worldwide
operation. It can be operated from line voltage 90 V ~ 270 V , 47 Hz ~ 63 Hz.
Power factor correction also provides to ensure low harmonic content.

User Manual DCX Series 400 W 7
Safety instructions
The general safety instructions and symbols must be observed during all
phases of operation of this instrument. Failure to comply with these
precautions or with specific warnings or instructions givens in this manual
violates safety standards of design, manufacture, and intended use of the
instrument. Scientific assumes no liability for the customer's failure to comply
with these requirements.
- Before applying power, verify all the safety precautions are taken, make all
the connections firm.
- Make sure the protective ground of the unit is connected with system
ground.
- Always operate the instrument only in prescribed operating conditions.
- Do not modify the instrument. This instrument is designed to meet all the
safety and operating conditions. Any modification done may not be
complying to the safety requirement and instrument may be damaged,
causing hazardous conditions.
Environmental conditions
Please do not operate the instrument in the place that vibrates, dusty, under
direct sunlight or where there is corrosive air. The Scientific Power supplies are
designed for safety, applies to following conditions.
- Indoor use.
- Ambient temperature 0 ~ 50°C non condensing 75% RH , 0~40°C non
condensing 95% RH
- Altitude up to 3000 meters
- Pollution degree 2
Installation category
These instruments are designed for installation category II, Over voltage
category II.
Grounding
The instrument ground must be well connected to instrument chassis of AC
power mains input supply. The instrument must be connected through
three conductor power cable, with the ground wire firmly connected to the
electrical safety ground of power outlet. Any interruption in protective
ground conductor , or disconnection will cause potential hazard that might
cause personal injury.

User Manual DCX Series 400 W8
Mains Input rating
This power supply unit is designed for specific mains input connections, as
specified in the Technical specifications. Do not use AC supply exceeding
the limits. For safety reasons the mains AC may should not fluctuate more
than 10 % of nominal voltage.+
Fuse
Fuses must be changed by authorized Scientific service personal only for
continued protection against risk and safety.
Live circuits
There are no serviceable part or alignment required by Operating
personnel. Operator must not remove the instrument cover. No internal
adjustment or component replacement is allowed by non-Scientific
authorised qualified personnel. Never replace components with power
cable connected. To avoid injuries, always disconnect power, discharge
circuits and remove external voltage source before touching components.

User Manual DCX Series 400 W 9
Safety symbols
Caution !
Caution ! : Denotes a hazard. Failure to follow instructions could result in minor
personal injury and/or property damage. Follow the instructions for proper
procedures.
Warning !
Warning ! : Denotes a hazard. Failure to follow instructions could result in
SEVERE personal injury and/or property damage. Follow the instructions for
proper procedures.
Symbols marked on instruments
Attention refer to the manual. Hazardous voltage exists,
Caution ! Electric shock.
Indicates Protective Ground Indicates Ground Terminal
Terminal
Off ( Supply ) On ( Supply )
Information on electrical and electronic equipment recycling
Our Equipment contain high quality components and material and are
designated to facilitate recycling. After appropriate use of this equipment ,
when this is to be discarded , the equipment must not be treated as municipal
waste. This must be disposed of separately via the appropriate return and
collection system available. By following these instructions, you ensure that
the product is treated correctly and help to reduce potential impacts on the
environment and human health, which otherwise result from inappropriate
handling. Recycling helps to conserve natural resources and protect
environment.
For more information on collection and return, please contact dealer / from
where you have purchased / to us giving full details.

User Manual DCX Series 400 W10
Chapter 1 Technical specifications
Unless otherwise stated these specifications are defined over the temperature
range of 0 to 40° C .
1.1 Specifications
DCX20M40 DCX60M14 DCX160M5 DCX300M2.6
DC Outputs Voltage 20 V 60 V 160 V 300 V
Multi Ranging (Parabolic)*
DC Output Current 40 A 14 A 5 A 2.67 A
Power 400 W 432 W 400 W 400W
Efficiency at 230V full load 82 % 85 % 86 % 87 %
Constant Voltage Mode
Load regulation 0 ~ 100% 3mV 5mV 10 mV 15mV
Line Regulation 2 mV 3 mV 5 mV 8 mV
Ripple 5mV 5mV 20mV 30mV
5Hz~1MHz
rms rms rms rms
Ripple 20 MHz 40mV 50mV 80mV 130mV
rms rms rms rms
Constant Current Mode
Load regulation 0 ~ 100 % 10 mA 7 mA 5 mA 5 mA
Line Regulation 8 mA 5 mA 3 mA 3 mA
Ripple BW= 5 Hz ~1MHz 50mA 20mA 10mA 8mA
rms rms rms rms
Remote sense drop typically 1 V 2 V 2 V 2 V
Programming Speed
Rise time ( 10% to 90% ) into resistive load
Time 100% load 10V:6.5ms 30V:20ms 80V:50ms 150V:100ms
20V:15ms 60V:55ms 300V:240ms
160V:170ms
Fall time ( 90% to 10% ) into resistive load
Time 100% load 10V:6.5ms 30V:6ms 80V:30ms 150V:60ms
20V:25ms 60V:70ms 300V:300ms
160V:200ms
Time No load 10V:150ms 30V:400s 80V:1.2s 150V:3s
20V:250ms 60V:700ms 160V:2.5s 300V:5ms

User Manual DCX Series 400 W 11
DCX20M40 DCX60M14 DCX160M5 DCX300M2.6
Recovery Time
Recovery within 50 mV 75 mV 200 mV 350mV
time @ 50 step 100 % load 100 us 100 us 100 us 100 us
Temperature Coefficients CV : 50 ppm/°C CC : 100 ppm after warm
up of 30 min and during 8 hrs
Output Stability CV : 100 ppm/°C CC : 300 ppm after warm
up of 30 min and during 8 hrs
Analog Programming (Rear panel 15 pin D connector (Female))
Programming Voltage : 0 ~ 5 V, Accuracy : 1 % of Vout+
rated, Input impedance : 1 M
Current : 0 ~ 5 V, Accuracy : 1 % of Iout
+
rated, Input impedance : 1 M Ω
Monitoring Voltage : 0~5V, Accuracy : 1% of Vout rated
+
Output impedance : < 2 / 0.4 mA maxΩ
Current : 0~5V, Accuracy : 1 % of Iout rated+
Output impedance : 2 / 0.4 mA maxΩ
V reference 5.1 V 10 mV+
Resistor Programming Voltage : 0~100%, 0~5 kOhm full scale ,
Accuracy and linearity: ±1 % of Vout rated
Current : 0~100%, 0~5 kOhm full scale ,
Accuracy and linearity: ± 1.5 % of Iout rated
Status Input / outputs Power Supply : OK = Logic 1 (High),
Remote Shut Down with +5V or relay contacts
Remote Programming
RS232 / USB / RS485/ LAN ADC : 16 Bits, DAC : 16 Bits
Voltage Programing Resolution : Better than 15 bit
Accuracy : 0.05% Vout + 0.05% Vrated
Current Programing Resolution : Better than 15 bit
Accuracy : 0.1% Iout + 0.1% Irated
Monitor Voltage Resolution : Better than 15 bit
Accuracy : 0.1% Vout + 0.1% Vrated
Monitor Current Resolution : Better than 15 bit
Accuracy : 0.25% Iout + 0.2% Irated
OVL & UVL Programing Resolution : Better than 15 bit
Accuracy : 0.05% Vout + 0.05% Vrated

User Manual DCX Series 400 W12
DCX20M40 DCX60M14 DCX160M5 DCX300M2.6
Front Panel controls Mains ON/ OFF, Voltage and Current
setting with Encoders,Switch Settings: Set,
Over Voltage, Under Voltage, Foldback,
Remote & Output
Indicators (LED) CV, CC, Over Voltage, Under Voltage,
Foldback, Remote & Output ON
Display 4 digit, voltage and current separately
Accuracy : ± (0.5 % + 2 d)
Display scale Voltage 0~20.00V 0~60.00V 0~160.0V 0~300.0V
Current 0~40.00A 0~14.00A 0~5.00A 0~2.67A
Protections Over voltage: Adjustable from 0.5 V ~ 105 %
of Vmax, Output shut-down, reset by Output
switch
Over current: Max current limited by CC
setting,/ Output Disable via Foldback
Over temperature: Output gets OFF, after
preset internal safe temperature
Foldback Protection: Selectable from CV to
CC mode or CC to CV mode transition with
Programmable Delay for output switched OFF
Output Terminals Bus bar and 2 wire connections for remote
sense / Optional Front Terminals
Parallel operation upto 6 untis in Master/Slave Mode
Serial operation 2 Units in series of same models, max 600V
to chassis
Mains Input Universal AC input, Single phase,
90 ~ 270V, 50 / 60 Hz ( 47 ~ 63Hz) ,
Input connector : IEC320/C14 ,
EN 60320/14, Standby Power : 13 Watts
@ 230V (Vout max, No load) Internal
Fuse L : 6 A, 5 x 20 mm ceramic fuse.
Power Factor 0.97 @ full load / 0.98 @ 50% load
Turn On delay 600 ms after mains switched ON
Inrush current <15A
Hold up Time 20 ms
Environment Conditions
Operating Temperature 0 ~ +50°C; with 100% load; derated to
75% at 60°C

User Manual DCX Series 400 W 13
Notes:
1. Sensing at the rear panel of the
power supply unit at sense
terminals.
2. Unit warm up time is 30 min.
3. Minimum output voltage
guaranteed to maximum of 0.2%
rated.
4. Minimum output current guaranteed
to maximum of 0.4% rated.
Current
V rated
I rated
V rated
I rated
2
2
DCX20M40 DCX60M14 DCX160M5 DCX300M2.6
Storage -40 ~ + 85°C
Humidity max. 95% non condensing at 40°C,
max. 75% non condensing at 50°C
Safety Insulation : Input to Output : 1500 Vdc for
1 min ; Input to case : 1500 Vdc , Insulation
resistance : 100 M at 25°C, 70% RH, 500 Vdc
Dimension W x D x H : 70 x 421 x 85 mm ( 2U, 1/6 19”
Rack size)
W x D x H : 70 x 421 x 125 mm ( For front
output option) excluding connectors,
terminals, switches, front and back panel
controls, handles etc.
Weight 3.2 kg
Cooling Forced , temperature controlled variable speed
Accessories Supplied Mains Cable, PC Interface Cable, Manual
(Subject to change without notice.)

User Manual DCX Series 400 W14
Note : Height excluding instrument feet
Note : When the power supply unit is mounted in 19” rack cabinet, instrument feet are removed and
maximum 6 units can be assembled in 19” rack mount kit.
Front panel when unit is used on table top :
Front panel when unit is mounted in 19” rack cabinet :
1.2 Power supply outline drawings - dimension
70.0 1 mm+
482.5 1 mm+

User Manual DCX Series 400 W 15
Rear panel when unit is used on table top :
Side view when unit is used on table top :
421.0 1 mm+
12.0 mm 25.0 mm
70.0 1 mm+

User Manual DCX Series 400 W16
Output bus dimension :
Top view :
70.0 1 mm+
M3
M5
M5
M3

User Manual DCX Series 400 W 17
1 Display Voltage : 4 digit display for setting and measured of output
voltage.
2 Display Current : 4 digit display for setting and measured of output
current.
Chapter 2 Panel controls
2.1 Front panel controls
The front panel controls are arranged erogonimically to ease in operation with
indicators. Before using the power supply unit, please read the following
explanation to each control, terminals and IO connectors.
1
2
3
7
8
9
12
11
14
4
5
6
13
10

User Manual DCX Series 400 W18
3 Set : Push button control for selecting setting for voltage or current.
When pressed in combination with “RM” button, “Comm” mode
selected. Comm mode used for communication parameters.
Associated LED above the button, lights when voltage and current
settings selected.
4 OV : Push button control for selecting setting for over voltage.
Associated LED above the button, lights when over voltage setting is
selected. When used with RM button, it is used for Master/Slave
settings.
5 UV : Push button control for selecting setting for under voltage.
Associated LED above the button, lights when under voltage setting is
selected. When used with RM button, it is used for System settings.
6 Fold : Push button control for enabling / disabling Fold mode.
Associated LED above the button, lights when fold back protection
enabled. It works with Fn button.
7 Instrument Feet : Used when the power supply unit is used on table top.
These are removed when used in 19” rack mount kit.
8 AC Power Switch : Mains AC power ON/Off control, when switched to
ON, supplies main AC power to unit.
9 RM : Push button control for releasing instrument from Remote
control. Associated LED above lights when instrument is in remote
control mode. When pressed in local mode it acts as a function button
for setting configuration.
10 Output : Push button to control DC output ON / Off. Associated LED
above lights when the output is ON.
11 Current : Current control encoder for setting the current. When
pressed, it gives fine adjustment control. When used with Menu, it is
used for setting the parameters in Menu selection.
12 CC LED indicator : LED indicator for CC , lights when power supply is in
constant current mode.
13 Voltage : Voltage control encoder for setting the voltage. When
pressed, it gives fine adjustment control. It is also used for setting the
over voltage, under voltage level settings. When used with Menu, it is
used for setting the parameters in Menu selection.
14 CV LED indicator : LED indicator for CV, lights when power supply is in
constant voltage mode.

User Manual DCX Series 400 W 19
1 USB : USB “B” connector, to connect the power supply to computer for
remote control operations.
2 J1 : RJ45 connector , gives connections for RS232, Rs485.
2.2 Rear panel controls
The rear panel is arranged with mains inlet connector, output terminals and
analog programming ports etc. .
1
3
5
9
7
6
2
8
4

User Manual DCX Series 400 W
3 J2 : Slave (RJ45) Reserved for future use.
4 LAN : LAN ( RJ45) connector for connecting PC for remote operations.
5 Ground : 4 mm banana screw terminal for grounding the chassis.
6 AC Input : AC mains inlet socket to power the instrument.
7 Analog Programming: 15 pin (F) D type connector for remote analog
programming. Refer 4.15 page 38 for details.
8 – DC Output + : DC Output Bus bars, to connect the load.
9 Sense Terminals : Remote sense terminals.
20