KORAD KWR Series User manual

Programmable DC Power Supply
KWR Series User Manual

Table of Contents
Product Features.............................................................
Front Panel Description ...................................................
Rear Panel Description ................................................ ....
1
3
Operatinginstruction ................................................ ... 5
Characteristics of the Votage Output ............................... 9
The External Size of the Power Supply .............................. 8
Communications ...........................................................11
Specifications ………………………...………….………...................
10
2

Product Series
KWR102 0 30V 0 30A 300W
KWR103 0 60V 0 15A 300W
Product Features
0 30V/0 60V, 0 30A/0 15A, 300W wide range output
The voltage output slope can be set
Various control interfaces: LAN, USB, RS232 & USB
The OCP & OVP parameters can be set
Supporting the stand alone dynamic output mode
5 digit current and voltage display with high accuracy
Convenient fast recall
1
KWR Series Wide Range Programmable DC Power Supply
External trigger and external switch interface
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Front Panel Description
2
KWR Series Wide Range Programmable DC Power Supply
Power Output Indicator
Key Lock Indicator
OCP Indicator
OVP Indicator
C.V Indicator
C.C Indicator
OVP
OCP ON/ OFF
VSET
REMO TE C OMP
V/A
ISET
EXT TR G
DYNAMI C
LOCK
PRIORITY
485 ID
( )( ) ( BEEP )
( )
( )
( )
VSET
485 ID
( )
V/A
ISET
PRIORITY
( )
OVP function and External trigger function
OCP function and Remote compensation function
Key lock function and Buzzer setting function
ON/OFF output and Dynamic output function
Voltage and current priority function
RS485 ID setting function
Voltage Display
Current Display

M1-M5 quick recall / storage function
and Dynamic output function
Press: turn off the flashing while setting
Press and hold: set the slope and press again to
exit the setting. And the unit is V/100uS.
Front output terminal: the max output current of the
secondary terminal is 10A. And the output of the power
supply will be automatically cut off if the current
exceeds 10A.
USB RS232 LAN
Rear Panel Description
3
KWR Series Wide Range Programmable DC Power Supply

RS232
LAN
RS232 communication port
Ethernet communication port
USB
SENSE:Remote Monitoring Port
TRIG:trigger port
Output terminal, max output current 30A
USB communication port
AC input
AC input 115V/230V switch
4
KWR Series Wide Range Programmable DC Power Supply
SENSE TRIG
+
IN GND

1.1 M1-M5 quick recall function
Instruction: Short press M1 M5 keys to quickly recall the contents stored
in 1 5.
1.2 M1-M5 quick storage function
Instruction: Adjust the stored voltage and current value and long press
the M key to store the current value in the memory of the selected M key.
Instruction: Short press OVP to activate the OVP value setting function,
adjust the OVP value to be set through the knob and the VSET key, and
short press the OVP to save and exit.
Instruction: When the OVP is at the OFF state, short press the OVP key
and then short press the ON/OFF key to enable this function. When the
OVP is at the ON state, short press the OVP key and then short press the
ON/OFF key to disenable this function.
3.1Set the OCP value
Instruction: Short press the OCP to activate the OCP value setting function,
adjust the OCP value to be set through the knob and the ISET key, and short
press the OCP to save and exit.
Instruction: When the OCP is at the OFF state, short press the OCP key
and then short press the ON/OFF key to enable this function. When the
OCP is at the ON state, short press the OCP key and then short press the
ON/OFF key to disenable this function.
5
operatinginstruction
KWR Series Wide Range Programmable DC Power Supply

Instruction: Long press the OVP key until there is a decimal point shown
in the right corner of the last digital code of the voltage display digital
tube, meaning that the external trigger function is activated. At this time,
the power output can be turned on by shorting two rear interfaces of
TRIG.
Instruction: Long press the OCP key until there is a decimal point shown
in the right corner of the last digital code of the current display digital
tube, meaning that the remote compensation function is activated. At this
time, the rear SENSE terminal can be used as the voltage compensation
terminal.
Instruction: Long press the LOCK key that can be locked when the LOCK
lamp is lit, and repeat this action to unlock the key.
Instruction: Short press the LOCK key to turn on or off the buzzer.
Instruction: Long press the VSET to activate the RS485 ID setting function,
turn the knob until the required ID occurs, and long press the VSET to save
and exit.
Instruction: Long press the knob to activate the voltage and current slope
setting function, turn the knob to increase or decrease the value, select
the voltage and current slope through VSET and ISET, and long press the
knob to exit the setting function, with unit / 100us.
Instruction: Step 1: Long press the ON/OFF to activate the dynamic setting
6
KWR Series Wide Range Programmable DC Power Supply

Step 2: When M1 M5 indicators are all off, Step 0 starts. At this time,
the voltage is displayed as a dynamic cycle number and the current is
displayed a dynamic step. Change the value through the knob, and switch
to the different item through VSET and ISET.
Step 3: Press M1. At this time, Step 1 starts when M1 indicator is lit. Set
the value of the first step. Change the voltage / current value through knob
and switch to the different item through VSET and ISET, press the knob to
switch to the required voltage slope and time. Change the value through
the knob, and switch to the different item through VSET and ISET.
Instruction: Short press M5 and turn the knob to increase, so that the
dynamic function can be recalled. Turn on ON/OFF for output.
Instruction: Long press ISET to activate the voltage and current priority
setting function. Turn the knob to set 0 as voltage priority and set 1 as
current priority, and long press ISET to save and exit.
7
function. At this time, M1 M5 key indicators are all off and M1 M5 show
digits 1 5. Set the dynamic steps with M1 M5 digit combination.
KWR Series Wide Range Programmable DC Power Supply

The External Size of the Power Supply
305 mm
175 mm
8
KWR Series Wide Range Programmable DC Power Supply

Characteristics of the Voltage Output
Voltage
Current
30A
30V
10V
10A
300W rated power
Voltage
60V
20V
5A
Current
15A
300W rated power
KWR102 KWR103
9
KWR Series Wide Range Programmable DC Power Supply
The KWR power supplies are regulated DCpower 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.
Below is a comparison of the operating areas of each power supply.
When the power supply is configured so that the total output (current
voltage output) is less than the rated power output, the power supply
functions as a typical constant current, constant voltage power supply.
If however, the power supply is configured such that the total output
(current voltage output) exceeds the rated power output, the 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.
*
*

10
 
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KWR Series Wide Range Programmable DC Power Supply
0-30A 0-15A
0-30V 0-60V
≤0.01%+3mv
≤0.01% + 3mv
≤0.5% +3mV
≤3mArms ≤3mArms
≤150ppm
1mV 1mV
≤150ppm ≤150ppm
≤0.01%+2mv
≤0.01%+3mv
≤0.5%+5mV
≤150ppm
≤0.1%+5mA
≤0.1%+ 3mA
≤0.5% +5mA
≤150ppm
1mA 1mA
≤150ppm ≤150ppm
≤0.1%+5mA
≤0.1%+3mA
≤0.5%+3mA
≤150ppm
1mV 1mV
1mA 1mA
Current
Voltage
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Accessories
User manual *1, Power cord*1, USB*1
Weight and Dimension
Load Regulation
KWR102
POWER
Models
300W 300W
KWR103
Line Regulation
Setup Resolution
Read Back Resolution
Setup Accuracy(25℃+-5℃)
Ripple(20-20M)
Temp. Coefficient
Read Back Temp. Coefficient
KWR102, KWR103: 91.5mm(W)*175mm(H)*305(D)
KWR102x3.9Kg, KWR103x3.9Kg
Voltage Rise Time
≤65ms
≤50ms
≤50ms
≤50ms
Fall time
Rise Time
Note: Specifications are subject to change without notice.
Note: the specifications below are tested under the conditions of
temperature 25℃ ±5℃ and the warm up for 5 minutes.
Specifications
≤1mVrms+0.03%of current output ≤1mVrms+0.03%of current output

ISET05:10.5
Set the current to 10.5A
ISET05?
Query the current setting value of the current
VSET05:12.5
Set the voltage to 12.5V
VSET05?
Query the current setting value of the voltage
IOUT05?
Query the current output value of the current
VOUT05?
Query the current output value of the voltage
BEEP05:
BEEP:1 turn on the buzzer,BEEP:0 turn off the buzzer
OUT05:
OUT:1 turn on the output,OUT:0 turn off the output
OUT05?
Returning the output status of the machine, 0 is output OFF while 1 is
output ON.
Communications
11
Baud rate: 9600/19200/38400/57600/115200 (the
factory baud rate of the power supply: 115200)
Parity bit: None
Data bit: 8
Stop bit: 1
Data flow control: None
RS485 communication commands add the address after
the command letters. Taking ID equalling 5 for example:
COM setting Set up the COM port inside the PC according to the
following list.
KWR Series Wide Range Programmable DC Power Supply

12
STATUS05?
Query the device status BIT0:CC/CV, BIT1:output, BIT2:V/C priority,
BIT4:the buzzer, BIT5:LOCK, BIT6:OVP status, BIT7:OCP status.
*IDN05?
Query the serial No. of the device
RCL05:5
Recall M5 as the current value (the value is 1 5)
RCL05:6
Recall LIST dynamic value
SAV05:5
The current value is stored in M5 (the value is 1 5)
OCP05:12.5
Set the OCP current value to be 12.5A
OCP05: ON/OFF
open/close OCP
OCP05?
Query the OCP current value
OVP05:15.5
Set the OVP voltage value to be 12.5A
OVP05: ON/OFF
open/close OVP
OVP05?
Query the OVP voltage value
VSLOPE05:31.5
Set the output voltage slope to be 31.5V/100uS
VSLOPE05?
Query the output voltage slope
ISLOPE05:1.5
Set the slope of the output current to be 1.5A/100uS
ISLOPE05?
Query the set output current slope
LIST0500:25, 6
Set the times of repetitions of LIST to be 25 and LIST sets 6
dynamic values
KWR Series Wide Range Programmable DC Power Supply

VASTOP05
Voltage stops automatically
VSTEP05:1
Set the step voltage 1V
VUP05
The step voltage set by the voltage increase
VDOWN05
The step voltage set by the voltage decrease
IASTEP05:1, 3, 0.1, 1
Staring current 1A, ending current 3A, each step 0.1A and interval 1s
LIST0500?
Query the times of repetitions of LIST and the number of
dynamic values
LIST0502:25.6, 2.5, 6.5, 5.8
Set the second dynamic value of LIST: voltage to be 25.6V,
current 2.5A, slope 6.5V/100uS and time 5.8sQuery the voltage,
current, slope and time of the second dynamic value of LIST
LIST0502?
Query the voltage, current, slope and time of the second
dynamic value of LIST
EXIT05:
EXIT1：0 turn off the external trigger, EXIT1:1 turn on the
external trigger
EXIT05?
Query the status of the external trigger
COMP05:
COMP1:0 turn off the external compensation, COMP1:1 turn on
the external compensation
COMP05?
Query the status of the external compensation
LOCK05:
LOCK:0 unlock the buttons, LOCK:1 lock the buttons
VASTEP05:1, 30, 0.1, 1
Starting voltage 1V, ending voltage 30V, each step 0.1V and the interval 1s
KWR Series Wide Range Programmable DC Power Supply

IASTOP05
Current stops automatically
ISTEP05:1
Set the step current 1A
IUP05
The step current set by the current increase
IDOWN05
The step current set by the current decrease
PRIORITY05:1
Set the priority of voltage and current, 0 is voltage priority while 1 is
current priority.
KWR Series Wide Range Programmable DC Power Supply
14

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SHENZHEN KORAD TECHNOLOGY CO., LTD.
Address:F3, Building A4, District B, Songbai Industrial Park,
Guangming New District, Shenzhen, 518106, P.R.China.
Tel: [phone] Fax: [phone]
E mail: [e-mail]
www.koradtechnology.com
www.korad.com.cn