I-Tech IT-N2100 Series User manual

Solar Array Simulator
IT-N2100 Series User Manual
Model: IT-N2100
Version: V1.0

Notices
© Itech Electronic, Co., Ltd. 2023
No part of this manual may be
reproduced in any form or by any means
(including electronic storage and
retrieval or translation into a foreign
language) without prior permission and
written consent from Itech Electronic,
Co., Ltd. as governed by international
copyright laws.
Manual Part Number
IT-N2100
Revision
First Edition: May 30th,2023
Itech Electronic, Co., Ltd.
Trademarks
Pentium is U.S. registered trademarks
of Intel Corporation.
Microsoft, Visual Studio, Windows and
MS Windows are registered trademarks
of Microsoft Corporation in the United
States and/or other countries and
regions.
Warranty
The materials contained in this
document are provided “as is”, and
is subject to change, without prior
notice, in future editions. Further, to
the maximum extent permitted by
applicable laws, ITECH disclaims
all warrants, either express or
implied, with regard to this manual
and any information contained
herein, including but not limited to
the implied warranties of
merchantability and fitness for a
particular purpose. ITECH shall
not be held liable for errors or for
incidental or indirect damages in
connection with the furnishing, use
or application of this document or of
any information contained herein.
Should ITECH and the user enter
into a separate written agreement
with warranty terms covering the
materials in this document that
conflict with these terms, the
warranty terms in the separate
agreement shall prevail.
Technology Licenses
The hardware and/or software
described herein are furnished under a
license and may be used or copied only
in accordance with the terms of such
license.
Restricted Rights Legend
Restricted permissions of the U.S.
government. Permissions for software
and technical data which are authorized
to the U.S. Government only include
those for custom provision to end users.
ITECH follows FAR 12.211 (technical
data), 12.212 (computer software).
DFARS 252.227-7015 (technical
data--commercial products) for national
defense and DFARS 227.7202-3
(permissions for commercial computer
software or computer software
documents) while providing the
customized business licenses of
software and technical data.
Safety Notices
A CAUTION sign denotes a
hazard. It calls attention to an
operating procedure or practice
that, if not correctly performed
or adhered to, could result in
damage to the product or loss of
important data. Do not proceed
beyond a CAUTION sign until
the indicated conditions are fully
understood and met.
A WARNING sign denotes a
hazard. It calls attention to an
operating procedure or practice
that, if not correctly performed
or adhered to, could result in
personal injury or death. Do not
proceed beyond a WARNING
sign until the indicated
conditions are fully understood
and met.
NOTE
A NOTE sign denotes
important hint. It calls attention
to tips or supplementary
information that is essential for
users to refer to.

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. i
Quality Certification and Assurance
We certify that IT-N2100 series instruments meet all the published
specifications at time of shipment from the factory.
Warranty
ITECH warrants that the product will be free from defects in material and
workmanship under normal use for a period of one (1) year from the date of
delivery (except those described in the Limitation of Warranty below).
For warranty service or repair, the product must be returned to a service center
designated by ITECH.
The product returned to ITECH for warranty service must be shipped
PREPAID. And ITECH will pay for return of the product to customer.
If the product is returned to ITECH for warranty service from overseas, all
the freights, duties and other taxes shall be on the account of customer.
Limitation of Warranty
This Warranty will be rendered invalid in case of the following:
Damage caused by circuit installed by customer or using customer own
products or accessories;
Modified or repaired by customer without authorization;
Damage caused by circuit installed by customer or not operating our
products under designated environment;
The product model or serial number is altered, deleted, removed or made
illegible by customer;
Damaged as a result of accidents, including but not limited to lightning,
moisture, fire, improper use or negligence.
Safety Symbols
Direct current
ON (power on)
Alternating current
OFF (power off)
Both direct and alternating
current
Power-on state
Protective conductor terminal
Power-off state
Earth (ground) terminal
Reference
terminal
Caution, risk of electric shock
Positive terminal

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. ii
Warning, risk of danger (refer
to this manual for specific
Warning or Caution
information)
Negative terminal
Frame or chassis terminal
-
-
Safety Precautions
The following safety precautions must be observed during all phases of
operation of this instrument. Failure to comply with these precautions or specific
warnings elsewhere in this manual will constitute a default under safety
standards of design, manufacture and intended use of the instrument. ITECH
assumes no liability for the customer’s failure to comply with these precautions.
Do not use the instrument if it is damaged. Before operation, check the
casing to see whether it cracks. Do not operate the instrument in the
presence of inflammable gasses, vapors or dusts.
The electronic load is provided with a power line during delivery and should
be connected to a socket with a protective earth terminal. Before operation,
be sure that the instrument is well grounded.
Make sure to use the power cord supplied by ITECH.
Check all marks on the instrument before connecting the instrument to
power supply.
Use electric wires of appropriate load. All loading wires should be capable
of bearing maximum short-circuit current of electronic load without
overheating. If there are multiple electronic loads, each pair of the power
cord must be capable of bearing the full-loaded rated short-circuit output
current
Ensure the voltage fluctuation of mains supply is less than 10% of the
working voltage range in order to reduce risks of fire and electric shock.
If you use the power supply to charge the battery, pay attention to the
positive and negative polarity of the battery when wiring, otherwise the
power supply will be damaged!
Do not install alternative parts on the instrument or perform any
unauthorized modification.
Do not use the instrument if the detachable cover is removed or loosen.
To prevent the possibility of accidental injuries, be sure to use the power
adapter supplied by the manufacturer only.
We do not accept responsibility for any direct or indirect financial damage
or loss of profit that might occur when using the instrument.
This instrument is used for industrial purposes, do not apply this product to
IT power supply system.
Never use the instrument with a life-support system or any other equipment
subject to safety requirements.

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. iii
Failure to use the instrument as directed by the manufacturer may render
its protective features void.
Always clean the casing with a dry cloth. Do not clean the internals.
Make sure the vent hole is always unblocked.
Environmental Conditions
The instrument is designed for indoor use and an area with low condensation.
The table below shows the general environmental requirements for the
instrument.
Environmental Conditions
Requirements
Operating temperature
0°C to 40°C
Operating humidity
20%-80% (non-condensation)
Storage temperature
-10°C to 70 °C
Altitude
Operating up to 2,000 meters
Pollution degree
Pollution degree 2
Installation category
II
Note
To make accurate measurements, allow the instrument to warm up for 30 min before
operation.
Regulatory Markings
The CE mark indicates that the product complies with all
the relevant European legal directives. The specific year
(if any) affixed refers to the year when the design was
approved.
The UKCA mark indicates that the product complies with
all relevant UK legal regulations (if accompanied by a
year, it indicates the year the design was approved).
The instrument complies with the WEEE Directive
(2002/96/EC) marking requirement. This affixed product
label indicates that you must not discard the
electrical/electronic product in domestic household waste.
This symbol indicates the time period during which no
hazardous or toxic substances are expected to leak or
deteriorate during normal use. The expected service life
of the product is 10 years. The product can be used safely
during the 10-
year Environment Friendly Use Period
(EFUP). Upon expiration of the EFUP, the product must
be immediately recycled.

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. iv
Waste Electrical and Electronic Equipment (WEEE)
Directive
This product complies with the WEEE Directive (2002/96/EC)
marking requirement. This affix product label indicates that you
must not discard the electrical/electronic product in domestic
household waste.
Product Category
With reference to the equipment classifications described in the
Annex I of the WEEE Directive, this instrument is classified as a
“Monitoring and Control Instrument”.
To return this unwanted instrument, contact your nearest
ITECH office.

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. v
Compliance Information
Complies with the essential requirements of the following applicable European
Directives, and carries the CE marking accordingly:
Electromagnetic Compatibility (EMC) Directive 2014/30/EU
Low-Voltage Directive (Safety) 2014/35/EU
Conforms with the following product standards:
EMC Standard
IEC 61326-1:2012/ EN 61326-1:2013 ¹²³
Reference Standards
CISPR 11:2015+A1:2016 Ed 6.1
IEC 61000-3-2: 2018 RLV
IEC 61000-3-3: 2013+A1:2017
IEC 61000-4-2:2008
IEC 61000-4-3 2006+A1:2007+A2:2010/ EN 61000-4-3 A1:2008+A2:2010
IEC 61000-4-4:2012
IEC 61000-4-5:2014+A1:2017
IEC 61000-4-6:2013+cor1:2015
IEC 61000-4-11:2004+A1:2017
1. The product is intended for use in non-residential/non-domestic environments. Use of the
product in residential/domestic environments may cause electromagnetic interference.
2. Connection of the instrument to a test object may produce radiations beyond the specified
limit.
3. Use high-performance shielded interface cable to ensure conformity with the EMC standards
listed above.
Safety Standard
IEC 61010-1:2010+A1:2016

IT-N2100 User Manual
Copyright © Itech Electronic Co., Ltd. vi
Content
Quality Certification and Assurance ........................................................................................................... I
Warranty ..................................................................................................................................................... I
Limitation of Warranty................................................................................................................................. I
Safety Symbols........................................................................................................................................... I
Safety Precautions .................................................................................................................................... II
Environmental Conditions......................................................................................................................... III
Regulatory Markings.................................................................................................................................III
Waste Electrical and Electronic Equipment (WEEE) Directive.................................................................IV
Compliance Information.............................................................................................................................V
Chapter 1 Inspection and Installation .............................................................................................. 1
1.1 Verifying the Shipment ........................................................................................................................ 1
1.2 Instrument Size Introduction................................................................................................................ 1
1.3 Adjustment of Power Handle............................................................................................................... 3
1.4 Mounting Brackets............................................................................................................................... 4
1.5 Connecting the Power Cord ................................................................................................................ 4
1.6 Connecting the DUT............................................................................................................................ 5
1.7 Options Introduction ............................................................................................................................ 7
Chapter 2 Quick Reference ................................................................................................................... 8
2.1 Brief Introduction ................................................................................................................................. 8
2.2 Front-Panel Overview.......................................................................................................................... 9
2.3 Keyboard Introduction .......................................................................................................................10
2.4 Status Bar Indicator Description........................................................................................................10
2.5 Rear Panel Introduction..................................................................................................................... 11
2.6 Introduction of Side Air Holes............................................................................................................ 12
2.7 Power-on Selftest..............................................................................................................................12
Chapter 3 Function and Features....................................................................................................... 15
3.1 Switching of Local/Remote Operation Modes................................................................................... 15
3.2 Output On/Off Operation ................................................................................................................... 15
3.3 Power State CC/CV Switching........................................................................................................... 15
3.4 Meter Interface ..................................................................................................................................16
3.5 View Interface....................................................................................................................................21
3.6 System Interface................................................................................................................................ 22
3.7 Config Interface.................................................................................................................................24
3.8 Program Interface..............................................................................................................................25
3.9 Factory Interface................................................................................................................................ 36
3.10 Protect Interface..............................................................................................................................36
3.11 Trigger Function...............................................................................................................................38
3.12 Inner Load Switch Settings..............................................................................................................39
3.13 Keyboard Lock Function.................................................................................................................. 40
3.14 Rear Panel Terminal Functions .......................................................................................................40
Chapter 4 Remote Control............................................................................................................... 41
4.1 USB Interface....................................................................................................................................41
4.2 LAN Interface.....................................................................................................................................41
Chapter 5 Technical Specification.................................................................................................. 44
5.1 Main Technical Parameters...............................................................................................................44
5.2 Supplemental Characteristics............................................................................................................55
Appendix .................................................................................................................................................... 56
Specifications of Red and Black Test Cables.......................................................................................... 56

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 1
Chapter 1Inspection and Installation
The power supply is a device with a high safety rating and has a protective
earth terminal. Before installation or operation, please check and read the
safety signs and instructions in this manual.
1.1 Verifying the Shipment
Unpack the box and check the contents before operating the instrument. If
wrong items have been delivered, if items are missing, or if there is a defect
with the appearance of the items, please contact the ITECH authorized dealer
or after-sales service department immediately.
The package contents include:
Item
Qty.
Model
Remarks
Programmable
DC Power
Supply
x1 IT-N2100
Series
IT-N2100 Series include:
IT-N2121, IT-N2131, IT-N2123
and IT-N2133
Power cord
x1
IT-E171/
IT-E172/
IT-E173/
IT-E174
Users can choose different power
cords according to the
specifications of power sockets in
the region. For detailed
specifications, please refer to 1.5
Installing Power Cords.
USB
communication
cable
x1
-
This accessory is selected when
the USB interface is used for
starting up remote operation.
Ex-factory Test
Report
x1
-
It contains the test report of the
instrument before
delivery.
Note
After confirming that the package contents are consistent and there is no problem, please
keep the packing box and related contents properly. When the instrument is returned to
the factory for service, it needs to meet the packing requirements.
1.2 Instrument Size Introduction
The instrument should be installed at well-ventilated and rational-sized space.
Please select appropriate space for installation based on the instrument size.

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 2
IT-N2121, IT-N2131, IT-N2123 and IT-N2133 models
Detailed Dimension Drawing

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 3
1.3 Adjustment of Power Handle
The power handle can be adjusted to three common state positions as shown
in the figure below. Note that when adjusting the handle, it should be adjusted
to the corresponding position with moderate force.
Note: The following picture is used to demonstrate the position of the
handle, the actual appearance should be subject to the actual product.
If the handle is not required, the handle can be removed, the method of removal
is:
Adjust the handle to the position as shown in the figure below, and then pull it to
the sides with both hands.
Note
When installing and removing the power handle, don’t use too much force to avoid
pinching your hand.

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 4
1.4 Mounting Brackets
IT-N2100 series power supplies can be installed on standard 19-inch brackets.
ITECH has prepared the IT-E158 bracket as a mounting kit for users. Users can
select the corresponding bracket manual for installation according to the
specific bracket model purchased.
Before installing the IT-N2100 series power supply on the rack, please remove
the rubber shock absorber and handle at the front of the instrument, and the
rubber shock absorber at the rear of the instrument.
Do not block the front half of the intake vents on the side of the instrument, the
rear half of the side vents, and the exhaust vents on the rear panel.
Remove the Shock Absorber
Tighten one corner of the rubber shock and slide it out.
Remove the Handle
1. Grasp the edge of the handle and pull it outward. This will rotate it.
2. Turn the handle to the vertical position and lower the instrument
horizontally.
3. Pull the handle outwards, then lift up.
To replace the handle, pay attention to its orientation. It will be damaged if
placed in the wrong direction
1.5 Connecting the Power Cord
Connect power cord of standard accessories and ensure that the power supply
is under normal power supply.
AC Power Input Level
The AC input on the rear of the instrument is a general AC input. It accepts
nominal line voltages in the range of 100 VAC to 240 VAC. 50 Hz or 60 Hz
required.
Note: When the AC input of 1500W model is 110VAC, the output power is
derated to 850W.
Categories of Power Cables
Select from the flowing schedule of power cord specifications an appropriate
power cord that matches the voltage for the area in which you use the

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 5
instrument. If the power cord included in the instrument you purchased doesn’t
match the voltage, contact the dealer or manufacturer for change..
China
IT-E171 United States &
Canada & Japan
IT-E172
Europe
IT-E173 England IT-E174
1.6 Connecting the DUT
Before connecting DUT, be sure to switch off the instrument.
If the DUT is a battery, do not short-circuit the battery. Shorted battery
can cause serious injury.
It is recommended to connect a fuse in series between the power
supply and the battery when testing the battery to prevent short
circuit caused by any case.
Before connecting the test lines, please confirm the maximum current
that the test lines can withstand.
During wiring, check that the anode and cathode of the test lines are
properly and tightly connected; anode ON and cathode OFF are
prohibited.
If the object to be tested is a battery, when wiring, please take
measures to prevent reverse connection of the battery and prevent
sparks.
Ensure that the output terminals are either insulated or covered using,
the safety covers provided, so that no accidental contact with lethal
voltages can occur.
Dangerous voltages may be present on the output terminals from
external energy sources such as batteries. The external energy
source must be disconnected before touching the output or sense
terminals.
The front and rear panels of this series power supply can be connected to the
DUT. The maximum output current of the front panel terminals is 10A. If
the current to be tested exceeds 10A, please be sure to connect the rear
panel output terminals.

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 6
Local Measurement
The instrument is local output by default, that is, the Menu > System >
Source > Remote Sense function is Off.
To use local measurement, connect the DUT as shown in the figure below.
Remote Measurement Function (Sense)
Menu > System > Source > Remote Sense is set to On to indicate that the
remote measurement function is enabled, and connect the DUT as shown in
the figure below.
NOTE
To ensure the stability of the system, use shielded twisted-pair cables
between the remote sense terminals and the DUT. Pay attention to the
positive and negative poles when wiring, otherwise it will damage the
instrument. When the remote measurement function is turned on, don’t
leave the sense terminal unconnected.

Inspection and Installation
Copyright © Itech Electronic Co., Ltd. 7
1.7 Options Introduction
Note
The following optional accessories provided by the company are sold separately, and
users need to purchase them separately according to their needs.
IT-N2100 series power supplies can be installed on standard 19-inch brackets.
ITECH has prepared the IT-E158 bracket as a mounting kit for users.
Please refer to the "IT-E158 User Manual" for a detailed installation guide for
the cabinet.

Quick Reference
Copyright © Itech Electronic Co., Ltd. 8
Chapter 2Quick Reference
This chapter briefly introduces the front panel, rear panel, keyboard key
functions and screen display functions of the IT-N2100 series power supply, so
as to ensure that you can quickly understand the appearance, structure and
key functions of the power supply before operating the power supply, so as to
help you make better use of this series of power supplies.
2.1 Brief Introduction
IT-N2100 series solar array simulator is a high performance DC power supply
with fast change of IV curve. It can simulate the IV output characteristics of
various solar panels under different environments (temperature, light, shadow
decay, aging). It can be applied for the tests of solar micro-inverter, power
optimizer, satellite power system, sail power array and so on. IT-N2100 has low
ripple, low noise and fast MPPT, supports multi-channel synchronous control
and high voltage topology.
The main features and benefits are as follows:
Precise simulation of the IV characteristics output of silicon, GaAs and
other types of solar PV panels
Built-in solar array simulation software, supporting multi-channel control
High-speed current dynamic response to support fast MPPT for
microinverters
Up to 1500V DC output common-mode withstand voltage, supporting
series testing of the DUT
Fixed mode, adjustable output impedance, can simulate CC, CV, CP output
Ultra-low current ripple, high precision sampling, programming and
measurement
Simulate I-V curve under different temperature and light
Built-in EN50530, Sandia, NB/T32004, CGC/GF004, CGC/GF035
regulations dynamic model test, and generate reports
Graphical operation interface, real-time display of MPPT status of PV
inverter
Dynamic list sequence programming: 100 steps x 20 data sets
Real-time data and curve recording for further analysis
Simulation of dynamic and static I-V curves of solar panels under cloud
shadow
Table mode supports I-V curve fitting with 4096 points
Quickly generate I-V by setting Voc, Isc, Vmp, Imp by four-point method
Comprehensive curve protection: OVP, OCP, OPP, OTP
Small size: 2U half rack for single channel
4.3" HD LCD, easy to operate

Quick Reference
Copyright © Itech Electronic Co., Ltd. 9
Front and rear panel output, adaptable to bench top and system integration
for various applications
Standard communication interface LAN, USB, digital I/O, support SCPI
Model Voltage Current Power
IT-N2121 80V 25A800W
IT-N2131 80V 25A 1500W*1
IT-N2123 150V 10A 800W
IT-N2133 150V 10A 1500W*1
*1 At 110Vac input, the power is 850W
2.2 Front-Panel Overview
The front panel of IT-N2100 is introduced as follows.
1. Handle (removable)
2. Rubber shock absorber (front)
3. The USB port allows for various functions such as screen capture, data
recording, and importing/exporting of photovoltaic curves or List files.
4. 4.3” HD LCD
5. Numeric keys (compound function) and ESC escape key
1 2 3 456
7 8 9 10 11

Quick Reference
Copyright © Itech Electronic Co., Ltd. 10
6. Pressable pulsating knob, left and right direction keys, Enter key
7. Shift compound key, View switch key, Menu key and power switch
8. Foot (removable)
9. The function keys corresponding to the menu at the bottom of the
screen (different menus are displayed on different screens)
10. On/Off output switch key
11. Output terminals (front panel terminals are used to facilitate wiring, but
the maximum current can only be 10A)
2.3 Keyboard Introduction
The key descriptions are as follows:
Key name
Function Description
Shift Compound keys, used in combination with other keys to
achieve compound menu settings
View
View switch button. In any interface, press the [View] key
to switch between the Meter interface and the Recorder
interface.
Menu
Menu function keys
Power
Power switch button
0-9
Numeric input keys
Decimal point
Esc
Cancel/Return key
Shift+1
Config menu shortcut keys
Shift+2
Protect function shortcut keys
Shift+3
System menu shortcut keys
Shift+4
Program (List and SAS) menu shortcut keys
Shift+5
The Trig function shortcut key allows for quick triggering
of List or SAS functions.
Shift+6
The Lock function shortcut key is used to lock the panel
keys.
Shift+7
The local key returns the power supply from remote mode
to local mode.
Shift+
Screen print key, insert the U disk in FAT 32 format before
use.
On/Off
The output on/off key is used to control the output state of
the power supply.
2.4 Status Bar Indicator Description
Status bar indicator and descriptions are as follows:

Quick Reference
Copyright © Itech Electronic Co., Ltd. 11
Indicator
Description
Indicator
Description
U disk inserted LIST is running
Sense remote
measurement
function is
enabled
LIST runs waiting for trigger
status
The power
supply works in
CC mode
OVP overvoltage protection
The device is
under remote
control
OCP overcurrent protection
UCP
undercurrent
protection
Foldback protection
OTP over
temperature
protection
Keyboard lock function is on
OPP overpower
protection Sense protection
Executing error Output off state
Power supply
works in CV
mode
Output disabled in Inhibit
state.
2.5 Rear Panel Introduction
The rear panel of IT-N2100 is introduced as follows.
1 2 3 4 5
6 7 8

Quick Reference
Copyright © Itech Electronic Co., Ltd. 12
1. Rubber shock absorber (rear)
2. LAN communication interface
3. USB communication interface
4. Inhibit (inhibit output) and trigger function terminals
5. Heat dissipation window (air outlet)
6. DC output terminal (rated current output terminal, current can be
greater than 10A)
7. Remote measurement terminal (Sense)
8. AC power input socket
2.6 Introduction of Side Air Holes
1. Air inlet
2. Air outlet
2.7 Power-on Selftest
A successful selftest indicates that the purchased power product meets delivery
standards and is available for normal usage.
Before operation, please confirm that you have fully understood the safety
instructions.
To avoid burning out, be sure to confirm that power voltage matches with
supply voltage.
Be sure to connect the main power socket to the power outlet of protective
grounding. Do not use terminal board without protective grounding. Before
operation, be sure that the power supply is well grounded.
To avoid burning out, pay attention to marks of positive and negative
polarities before wiring.
Selftest Steps
The normal self-test process of the power supply is as follows:
1. Connect the power cord correctly, press the power button to turn on the
12