Motech LPS 505N User manual

LPS 505N
Programmable DC
Power Supply
User’s Manual

Legal Notices
The information in this document is subject to change without notice.
MOTECH makes no warranty of any kind with regard to this manual, including, but
not limited to, the implied warranties of merchantability and fitness for a particular
purpose. MOTECH shall not be held liable for errors contained herein or direct,
indirect, special, incidental or consequential damages in connection with the
furnishing, performance, or use of this material.
MOTECH INDUSTRIES INC.
6F, No. 248, Sec. 3, Pei-Shen Road, Shen-Keng Hsiang, Taipei Hsien, 222, Taiwan
Copyright Notices. Copyright 2007 MOTECH, all rights reserved. Reproduction,
adaptation, or translation of this document without prior written permission is
prohibited, except as allowed under the copyright laws.

Warranty
All MOTECH instruments are warranted against defects in material and
workmanship for a period of one year after date of shipment. MOTECH agrees to
repair or replace any assembly or component found to be defective, under normal
use during this period. MOTECH's obligation under this warranty is limited solely to
repairing any such instrument, which in MOTECH's sole opinion proves to be
defective within the scope of the warranty when returned to the factory or to an
authorized service center. Transportation to the factory or service center is to be
prepaid by purchaser. Shipment should not be made without prior authorization by
MOTECH.
This warranty does not apply to any products repaired or altered by persons not
authorized by MOTECH, or not in accordance with instructions furnished by
MOTECH. If the instrument is defective as a result of misuse, improper repair, or
abnormal conditions or operations, repairs will be billed at cost.
MOTECH assumes no responsibility for its product being used in a hazardous or
dangerous manner either alone or in conjunction with other equipment. High
voltage used in some instruments may be dangerous if misused. Special
disclaimers apply to these instruments. MOTECH assumes no liability for
secondary charges or consequential damages and in any event, MOTECH's liability
for breach of warranty under any contract or otherwise, shall not exceed the
purchase price of the specific instrument shipped and against which a claim is
made.
Any recommendations made by MOTECH for use of its products are based upon
tests believed to be reliable, but MOTECH makes no warranty of the results to be
obtained. This warranty is in lieu of all other warranties, expressed or implied, and
no representative or person is authorized to represent or assume for MOTECH any
liability in connection with the sale of our products other than set forth herein.
MOTECH INDUSTRIES INC.
6F, No. 248, Sec. 3, Pei-Shen Road, Shen-Keng Hsiang, Taipei Hsien, 222, Taiwan
Telephone : [phone]
Facsimile : (886-2) 2662-5097
Email : [email protected]
URL : www.motech.com.tw

※※※ Storage. Freight. Maintenance. Disposal ※※※
Storage
When don’t use the device, please pack it properly and store under a good
environment.
(The packing is no needed when the device under appropriate environment.)
Freight
Please use the original packing material when move the device. If the packing
material is missing, please use the equivalent buffer material to pack and mark it
fragile and waterproof to avoid the device damage during movement. The
device is precision equipment, please use qualified transportation as possible.
And, please avoid heavy hitting to damage the device.
Maintenance
There is no maintenance operation for the general user (except for the note in the
manual). Please contact our company or agent when the device occurred the
user judgment abnormal. Don’t maintain by yourself to avoid occurred
unnecessary danger and serious damage to the device.
Disposal
When the device in badly condition and can’t be used or repaired, please discard
it according to your company disposal procedures or local legal procedures. Don’t
discard arbitrary to avoid polluting environment.

Table of Contents
1. Introduction.......................................................................................................1
1.1 An Overview of the Product...................................................................1
1.2 Features ................................................................................................1
2. Specification......................................................................................................4
3. Notices before Using........................................................................................6
3.1 Confirm Attachment before Using..........................................................6
3.2 The Description of Using .......................................................................6
3.3 Ambient Environment ............................................................................6
3.4 Storage..................................................................................................6
3.5 Power-Line Voltage................................................................................7
3.6 Fuse.......................................................................................................7
3.7 Warming Up...........................................................................................7
3.8 End Test.................................................................................................7
4. Panel Description..............................................................................................8
4.1 LPS 505N Panel Description.................................................................8
4.1.1 Front Panel Description.........................................................................8
4.1.2 Rear Panel Description........................................................................16
5. Operation Setting............................................................................................18
5.1 Voltage Setting ....................................................................................18
5.2 Current Setting ....................................................................................18
5.3 OVP.....................................................................................................18
5.4 OCP.....................................................................................................18
5.5 Rotary Controller (output on) ...............................................................19
6. Remote Interface Protocol and Package Mode ............................................20
6.1 Preface................................................................................................20
6.2 Definition of Parameters......................................................................20
6.3 Error/Event Queue...............................................................................21
6.4 Compatible MOTECH LPS and PPS Protocol.....................................22
6.5 SCPI Compatiable Information ............................................................26
6.5.1 SCPI Frequent Command ...................................................................26
6.5.2 SCPI Command for Subsystem...........................................................27
6.6 Rules of Status Definition.....................................................................37
7. Accessories.....................................................................................................40

1
1. Introduction
1.1 An Overview of the Product
Motech LPS 505N is a programmable DC power supply with three (3) outputs that
channel 1 and channel 2 are linear power supply and channel 3 is a switching
mode power supply. LPS 505N comes with 12 bits resolution. The maximum total
output power is 222 watts with both channel 1 and channel 2 providing 96 watts
each (0 ~ 32V/3A) and channel 3 providing 30 watts (0 ~ 15V/5A). For the channel
3, the maximum output power is 30 watts. When the output voltage is set to 6 volts
or less, the output current can be up to 5A. If the output voltage is set above 6 volts
then the maximum output current depends on the output voltage setting and the
maximum output power of 30 watts. This is a unique feature and it differs from other
traditional power supplies. For the channel 1 and channel 2, they can be put in
parallel mode if the output current is required to drive more than 3A. Also, they can
be put in serial mode if the output voltage is required to provide more than 32V.
Tracking function is a convenient feature that is also provided to meet general
applications. The LPS 505N has a rotary and numeric keypads for user to
manipulate this electronic instrument easily. The LPS 505N provides a memory
space enough to store 100 configurations that can be recalled later after saving.
This feature offers an easy way to restore the application setting. There is a build-in
timer (1 sec~100 hrs) that can be used to control when to switch off the output
power. This feature provides an extra safety for burning room and electroplating
applications. The LPS 505N also provides over voltage protection (OVP) and over
current protection (OCP) features used to keep the output voltage and current
within the safety level preventing the target from the damage caused by the over
current. The key lock feature is added to avoid accidentally wrong setting to the
LPS 505N. When the input power and the load change, the LPS 505N provides a
stable output with the load and line regulation within 0.01% and the transient time
less than 50 us. When in remote mode, the LPS 505N may output a new setting in
50 ms after receive a command. This quick response time may increase the
throughput on the mass production lines.
1.2 Features
1. Triple output:
Voltage Ranges : 0 ~ 32V (CH1&CH2) / 0 ~ 15V (CH3)
Current Ranges : 0 ~ 3A (CH1&CH2) / 0 ~ 5A (CH3)

2
Power Ranges : 0 ~ 96W (CH1&CH2) / 0 ~ 30W (CH3)
The maximum output current of channel 3 basically depends on the output
voltage setting and the maximum output power of 30 watts. However, it is limited
to 5A maximum. For example, if the output voltage of the channel 3 is set to 15V,
then the maximum output current is 2A. If the output voltage is set to 6V, then
the output current could be up to 5A. However, if the output voltage is set to 3V,
the output current will still keep within 5A because of the maximum output
current limit.
2. Digital rotary, number key, function key setting:
The rotary can be used to change the output voltage rapidly. Simulate the surge
of the voltage output. It provides the solution for the trigger circuit testing. User
can set up output voltage by numeric keypads too. It differs from original VR
adjusting. Function keys provide users operation more friendly and easily.
3. Precious measurement on voltage & current:
In addition to the precise outputs, LPS 505N provides voltage and current
measurements (read back). Users can reduce the measurement equipment
budget and space.
4. Memory and timer function:
LPS 505N provides a memory space to store 100 settings that can be easily
recalled. This feature makes the restoration of the previous settings quickly and
friendly. The LPS 505N has two (2) timers with resolution of 1 second and 1
millisecond respectively. The timers are used to time the outputs. When the
timer counts down to zero the LPS 505N will automatically turn the output off.
This feature is useful when the LPS 505N is providing the power to the targets
in the burning room. Also it can be used to precisely control the output current
down to millisecond duties for electroplate applications.
5. OVP, OCP & lock protection function:
The over voltage protection (OVP) and over current protection (OCP) features
limit the maximum output current and voltage to avoid damages to the target
when doing experimentations in a laboratory. The key lock feature disables all
keys except the CLR key. It prevents the LPS 505N from the accidentally wrong
setting and then avoids the damages to the target.
6. Series, parallel mode:
In serial mode, CH1/CH2 can output maximum 64V with positive/negative
output. It can be used for OP circuit design. In parallel mode, CH1/CH2 can
output 6A maximum.
7. Dual tracking:

3
Users only needs to setup CH1 output voltage and current, LPS 505N will
output the same voltage/current at CH2. This is convenient to test two samples
at the same time.

4
2. Specification
Model
LPS 505N
Channel NO.
CH1 & CH2
CH3
Output Voltage
0~32V
0~15V
Output Current
0~3A
0~5A
Output Power
(CH3 Auto Ranging)
96W
30W
Line Regulation ±(% of output + offset)
Voltage
0.01% + 2mV
Current
0.01% + 300uA
Load Regulation ±(% of output + offset)
Voltage
≤3mV
≤5mV
Current
0.01% + 300uA
Ripple and Noise (20Hz ~ 20MHz)
Normal Mode Voltage
700uVrms / 7mVpp
1mVrms / 20mVpp
Normal Mode Current
<1mA
<5mA
Resolution
Programming
10mV / 1mA
10mV / 2mA
Readback
10mV / 1mA
3mV / 2mA
Programming Accuracy ±(% of output + offset)
Voltage
0.05% + 20mV
0.05% + 6mV
Current
0.05% + 3mA
0.05% + 4mA
Readback Accuracy ±(% of output + offset)
Voltage
0.05% + 20mV
0.05% + 6mV
Current
0.05% + 3mA
0.05% + 4mA
Temperature Coefficient per °C ±(% of output + offset)
Voltage
<0.1% + 3mV
Current
<0.2% + 2mA
Tracking Accuracy ±(% of output + offset)
Voltage
0.1% + 40mV
Transient Response Time
<50uS
Stability, constant output & temperature ±(% of output + offset) , 8hrs
Voltage
<0.2% + 2mV
Current
<0.1% + 1mA

5
Voltage Programming Speed
Rising Time at Full Load
3mSec
Rising Time at No Load
3mSec
Falling Time at Full Load
8mSec
Falling Time at No Load
250mSec
General
AC Line Input Voltage
Ranges
115/220 VAC ± 10% (50/60Hz)
Temperature Ratings
Operating( 0°C~40°C)，Storage (-10°C~70°C)
Common-Mode Voltage
±240Vdc
Dimensions ( W×H×D )mm
(216 × 135 × 432)
Weight
6.5 kg
LPS 505N Features：
LCD display, triple independent output and display on LCD
CH3 auto-ranging output
Low Ripple, Low Noise
Number and function key
Store and recall settings (100)
Timer (1 sec ~ 100 hours)
Precise voltage and current measurement
OVP, OCP and key lock
Serial and parallel mode
Dual Tracking Mode
Average measurement time 50m sec
Standard RS232, USB interface
Optional Interface: GPIB, LAN, and I/O Port

6
3. Notices before Using
3.1 Confirm Attachment before Using
Please follows the below items to protect your rights as you receive this instrument.
1. If there is ruin or scratch bad condition on product overlook.
2. The standard attachment as table 7-1, please confirm if there is any missing.
※If above conditions, please inform us for prompt service.
3.2 The Description of Using
The tester is an accurate instrument. Please read through this manual to prevent
improper operation and arbitrary using from causing this instrument damaged.
Please calibrate once a year for keeping accuracy.
3.3 Ambient Environment
1. Do not use this instrument in an environment with dusts, vibrating, and corrosive
gas and do not explore this machine directly to the sunlight. Please use this
instrument in an environment that the ambient temperature is in 0~40°C and the
relative humidity is in 20%~80%. If the temperature is over 40°C, please don’t
use temporary until the temperature is back to normal to avoid the unit damaged
caused by the over temperature.
2. The tester is equipped with a cooling fan on the rear panel to keep the internal
temperature down, so adequate ventilation should be ensured. The tester
should be located at least 10cm from any object or wall behind it. Do not block
the ventilation holes to keep the tester in good precision.
3. The tester has been carefully designed to prevent the noise from the AC power
source. However, it should be used in the noise-free environment as low as
possible. If noise is inevitable, please install a power filter.
3.4 Storage
The tester should be stored within the temperature range -10°C~70°C, the relative
humidity 80% RH. If the unit is not to be in use for a long time, please store it in the
original or similar package and keep it from direct sunlight and humidity.

7
3.5 Power-Line Voltage
The tester is an instrument which uses AC power 115V/220V 50Hz/60Hz. Before
plugging in the power cord, make sure the power switch is in the off position and
the voltage of the rear panel is the same as the required voltage.
3.6 Fuse
There is one fuse installed in the rear panel. When replacing the fuse, please notice
the following:
1. Please turn off the power and disconnect the AC power cord and all the other
connections to the power supply.
2. The checking of fuse can’t sure with the eyes, the testing value under 15is
normal.
3. When replacing the fuse, the cap jut out the rear panel on fuse stand using flat
type screwdriver or pressing softly by hand.
Mark
Center Voltage
Range
Fuse
115
115V
100V~125V
Slow
220
220V
200V~250V
Slow
Warning：
For continues protection against fire hazard, replace only with the
same type and rating of fuse as specified.
3.7 Warming Up
This tester activates at power on. However, in order to meet the accuracy in the
specification, please warm it up for 30 minutes or longer.
3.8 End Test
When tests are done and the tester is not in use or need to leave for a while during
usage, make sure to turn off the power switch.

8
4. Panel Description
4.1 LPS 505N Panel Description
4.1.1Front Panel Description
(1) Display:
Display is a 20x4 yellow green backlight LCD
(2) Rotary(ENTER):
Rotary can adjust voltage and current. Users can press it as ENTER
function.
(3) M:
Press M key to enter the memory function. Users can then select one
(1) from the 100 memories to store or recall the configuration by
pressing the STORE or RECALL key.
(4) CH:

9
Selecting CH1/CH2/CH3
(5) ON/OFF:
This keypad is used to turn the output power on or off.
(6) Number Key:
Input number by number key. To set the voltage or current, press the
“V” or “A” key after the number input.
(7) ►(STORE):
This keypad has two (2) functions. When the output is on, this key is
used to move the cursor to select the digit to be adjusted. Users then
adjust the digit by turning the rotary. When in memory function, this
keypad is used to store the current configuration into the memory
simply by pressing it.
(8) ◄(RECALL):
This keypad has two (2) functions also. When the output is on, press
this key to move the cursor to the selected digit and then turning the
rotary to adjust the value of the digit. When in memory function, by
pressing this key to recall a stored configuration from the memory.
(9) DISP:
Press this key to select the display to show the voltage/current or
power/resistance readout.
(10) V(Voltage):
Press this key to set voltage after number input.
(11) A(Current):
Press this key to set current after number input.
(12) Config:
Press this key to enter the configuration setting. There 16 items to be
set in this mode.
1. Timer: The initial value is OFF. Press the rotary to enter timer
configuration.

10
A. Using rotary or ◄►to move the cursor onto the digit and input the
number. Timer: 00:00:00 (HH:MM:SS)
B. Switching CH1/CH2/CH3 by press CH key. Then press rotary to
switch ON/OFF
C. Start Timer when press ON/OFF key
D. Press rotary + CLEAR to pause the timer. Restart by repeating the
same step
2. TRACKING: The initial value is OFF, switch to ON by pressing the
rotary. The CH2 will have the same voltage and current
setting as the CH1.
3. OVP setting: Over voltage protection. Press the rotary to enter OVP
Configuration. Press “CH” to select CH1/CH2/CH3.
Users can press ON/OFF to enable or disable OVP and
input the voltage value via the number keys. Please
remember to press rotary to save the settings.

11
4. OCP setting: Over current protection. Press rotary to enter OCP
Configuration. Press “CH” to select CH1/CH2/CH3.
Users can press ON/OFF to enable or disable OCP and
input current value via the number keys. Please
remember to press rotary to save the settings.
5. Baud rate: Transmission speed. Users can select baud rate for 1200,
2400, 4800, 9600, 19200, 38400 by rotary.
6. Interface: Transmission interface. Users can select RS232, USB,
GPIB (Optional), LAN Port (Optional) by using rotary.

12
7. DHCP: This parameter is for LAN port setting. The default value is
“OFF”mode. You may change the mode by press the rotary.
At DHCP ”ON”mode, a dynamic IP address can be obtained
from the server.
8. IP***.***.***.***: When the DHCP is off, it needs to set an IP
address for the LPS 505N if LAN is selected.
Users may use the ◄►keypads to locate
the cursor and then use the number keypads
to key-in the right IP address.
9. BEEP: Buzzer. Press rotary to switch the buzzer on or off.