Tonghui TH 6900 Series User manual

OPERATION MANUAL
TH 6900 Series
Constant Power DC
Power Supply
TH 6900 Series DC Power Supply
V 1 .1 @ 2022.06

Table of Contents
Chapter 1 Overview ..........................................................................................................1
1.1 Introduction ..........................................................................................................1
1.2 Product Features .................................................................................................1
1.3 Safety Instructions ...............................................................................................2
1.3.1 Safety Symbols..........................................................................................2
1.3.2 Safety Brief ................................................................................................3
1.4 Unpacking & Installation ......................................................................................5
1.4.1 Selected Installation Location....................................................................5
1.4.1.1 Inspection Before Unpacking ..........................................................5
1.4.1.2 Unpacking .......................................................................................5
1.4.2 Environment...............................................................................................6
1.4.3 Input Wiring................................................................................................7
1.4.4 Output Wiring.............................................................................................7
1.4.4.1 Wiring Instruction.............................................................................7
1.4.4.2 Battery Load Wiring Instruction.......................................................8
1.4.4.3 Inductive Load Wiring Instruction....................................................9
1.4.4.4 Wire Diameter Requirement............................................................9
Chapter 2 Panel 1 ..........................................................................................................2-1
2.1 Front Panel Description .......................................................................................1
2.1.1 Key Function Introduction..........................................................................1
2.2 Rear Panel Description........................................................................................3
2.3 Technical Specifications.......................................................................................3
2.3.1 Electrical Characteristics ...........................................................................3
2.3.2 Voltage & Current Specifications...............................................................5
2.3.3 Dimensions................................................................................................5
Chapter 3 Operating Instructions 1SCPI Protocol 6-11

Chapter 1 Overview
1
Chapter 1 Overview
Thank you for purchasing and using our products. Before you use
this instrument, please first confirm the matters in Chapter 7 of
the manual "Warranty" to protect your rights and interests.
1.1 Introduction
TH6900 series constant power DC power supply (or DC power
supply) is a DC type programmable power supply with exquisite
appearance, small size, high performance, powerful function and
simple operation. It is a high performance and wide range single
output DC high power switching power supply for test systems in
aerospace and defense, consumer electronics, computer and
peripheral, communication, semiconductor, solar and automotive
electronics industries.
The functional features of TH6900 series constant power DC
power supply are as follows:
⚫High resolution and high accuracy;
⚫Low ripple and low noise;
⚫Wide voltage range, 0~1000V, various voltage levels
available;
⚫Support multiplemodes, power supply constant voltage (CV),
constant current (CC), constant power (CP) mode;
⚫Fast transient response capability;
⚫Flexible operation interface for user-friendly operation;
⚫Output parallel connection is possible, and the modular
design is convenient for users to expand capacity;
⚫Flexible and powerful sequence test function;
⚫Complete protection, safety performance is guaranteed;
⚫Support OVP, OCP, OPP and input undervoltage protection
and over-temperature protection of the power supply;
⚫With analog control interface, the power output can be
controlled separately through the external analog interface;
⚫Built-in USB/RS232/GPIB/LAN/CAN communication
interface.
1.2 Product Features
TH6900 series constant power DC power supply is only 2U
chassis, especially suitable for system testing and industrial
control, the basic functions of the power supply are mainly:
⚫Constant voltage (CV) mode, constant current (CC) mode,
constant power (CP) mode output
The output mode of the DC test power supply is divided into
constant voltage (CV) mode, constant current (CC) mode
and constant power (CP) mode. The output mode depends
on the set value of the output voltage, and current as well as

Chapter 1 Overview
2
the size of load resistance.
⚫Built-in input undervoltage, short circuit, over-temperature
protection, internal hardware input undervoltage, short circuit,
over-temperature protection, can stop the output in the
shortest time to protect the DC test power supply and the
load in the connection.
⚫POST Function
Every time the system is powered on, it must perform a self-
test to check some of the internal circuits, and if it is not
normal, it cannot enter the normal standby state interface.
⚫10 non-volatile save and read back shortcut groups
To adapt to different test requirements, save 10 groups of
opearting modes, and store 10 groups of modes in non-
volatile memory. They are not lost after power failure, and it
can be easily recalled.
⚫Sequence test
The sequence test function contains a total of 50 sequences
stored in non-volatile memory, each group contains 20 test
steps, the user can edit the function of each step according
to actual needs, so that the power supply can be output in
constant voltage, constant current or constant power mode
in a sequence to meet specific test requirements.
⚫Local or remote control operation mode
Switching the local operation mode, local mode can be
operated by keystroke, and remote mode can only be
operated by communication port. Please refer to the
appendix for the specific commands of the protocol used for
external communication.
⚫Analog port remote control operation mode
With a variety of voltage, current and overvoltage given
mode, and complete control and monitoring functions.
1.3 Safety Instructions
The safety precautions in this section and in the manual must be
followed throughout the operation, maintenance, and repair of
this product. Failure to follow these safety precautions results in
the manufacturer disclaring that it is not responsible for the user's
operations in violation of such requirements.
1.3.1 Safety Symbols
Symbol
Description
Symbol
Description
Grounding
Turn on the power
Disconnect the power

Chapter 1 Overview
3
PE
Protective
Conductor
Indicates a switch that turns the
power ON/OFF with the same
operator. The normally used
button has two stable positions.
Prohibit
High temperature: indicates that
the temperature here is higher
than the acceptable range of the
human body, do not arbitrarily
contact to avoid injury to
personnel.
High Voltage Risk
This logo suggests that this
device should not be mixed with
other household waste for
disposal. To prevent
uncontrollable waste disposal
from causing adverse ecological
and health effects, the device
should be recycled to improve
the utilization of material
resources. When recycling old
devices, you can contact the
retailer.
Indoor Use
Safety: To avoid injury to
personnel or damage to the
instrument, the operator
must refer to the
instructions in the manual.
Danger! High Voltage
The logo indicates that
there is a risk that failure to
follow the operating
instructions may result in
personal injury, so please
do not operate without
understanding the
instructions.
This logo indicates that there is
a risk that failure to follow
operating instructions may result
in injury or death, and this logo
draws your attention to
procedures, practices,
conditions, etc.
1.3.2 Safety Brief
The following general safety precautions must be observed
during operation or maintenance of this instrument, and we will
not be liable for any injury to persons or damage to machinery
caused by the customer's failure to observe these precautions or
any of the specific warnings in this manual.
Please be sure to read this manual thoroughly before use and keep it in
a safe place.

Chapter 1 Overview
4
Do not use the product for purposes other than those described in the
manual.
Before connecting the power supply, please check that the power supply
meets the rated input value of the instrument, and make sure the switch
is OFF.
Protective grounding: Before turning on the power, be sure to connect
the protective grounding to prevent electric shock.
The need for protective grounding: Do not disconnect the internal or
external protective ground wire or interrupt the connection of the
protective ground terminal. Doing so will cause a potential electric
shock hazard that may cause injury to humans.
Fuses: Use only fuses of the required rated current, voltage and
specific form (normal fuse, time delay, etc.). Do not use fuses of
different specifications or short-circuit fuse holders, as this may cause
a risk of electric shock or fire.
Do not remove the housing of the instrument: The operator must not
remove the housing of the instrument. Replacement of parts and
internal adjustments should only be carried out by qualified service
personnel.
Do not operate in explosive or corrosive atmospheres
Do not operate the instrument under flammable gas or gaseous or
corrosive atmospheres
●Please turn off the power switch and disconnect all the wires
when you change the position of the product.
●The weight of the product is more than 20kg, please operate
more than two people when resetting the position, you can find
the weight of the product in the product manual.
●Please be careful when handling the product, avoid collision, the
high product is easy to fall, please be careful.
●Check to make sure that the AC input voltage setting is
consistent with the fuse specification and that there is no
abnormality on the surface of the power cord, and make sure to
disconnect the power cord or turn off the power switch before
checking.
●If there is any abnormality or fault, please stop using

Chapter 1 Overview
5
immediately, disconnect the power cord or disconnect the power
from the power distribution box, and do not use until the product
is repaired.
●Please use a cable with higher overcurrent capacity for output or
load cable.
Do not allow water droplets or metal objects to enter the interior of
this product.
If the product is damaged due to the use of incorrect grid input,
it is not covered by the product warranty.
When the voltage and current setting is completed and the
output is started, the output terminal is a dangerous voltage,
and touching it arbitrarily may cause injury or death.
1.4 Unpacking & Installation
1.4.1 Selected Installation Location
When installing, please choose a location with good ventilation
and heat dissipation, the distance between the air inlet (outlet)
and the wall or shelter should be more than 30cm, and avoid
placing in the environment of direct sunlight, hot and humid,
corrosive substances, and water shower is strictly prohibited.
1.4.1.1 Inspection Before Unpacking
Check the box for damage, and if damage is found, notify the
freight forwarder to inspect the goods and record the damage at
the time of delivery. If there is no damage, open the box
according to the following steps.
1.4.1.2 Unpacking
(1) Unpack the equipment according to the requirements of the
outer box of the equipment and remove the equipment.
(2) First check the product nameplate to make sure the model
matches the order, check the objects in the box tomake sure
they match the packing list, if the items in the box do not
match the contents listed in the "packing list", please contact
the distributor or customer service center of Changzhou
Tonghui Electronic Co.Ltd.
(3) Visually observe whether there are obvious such as metal
scratches damage, scribbles, dents, etc., check whether
there is a loose connection, fasteners have not fallen off, or
other abnormalities, if damage is found, please immediately

Chapter 1 Overview
6
notify Changzhou Tonghui Electronics Co., Ltd. or its
distributors. Our customer service center will repair or
replace the machine for you. Please do not return the
product immediately without notifying Changzhou TongHui
Electronics Co., Ltd. or its dealers.
(4) To prevent accidental electric shock, please do not open the
top cover of the instrument by yourself. If any abnormality
happens to the instrument, please seek technical support
from Changzhou Tonghui Electronics Co.,Ltd. or its
designated distributors.
1.4.2 Environment
(1) Power supply in the installation should maintain good
ventilation and heat dissipation, power supply inlet (outlet)
and the distance between the wall or shelter should be more
than 30cm, and contact with corrosive substances is strictly
prohibited.
(2) Please make sure that the AC power to be connected meets
the specifications.
(3) Please refer to the specification parameters of each model
for ambient temperature and humidity.
(4) After the power supply is installed and test run, it is
recommended that the power supply should be left in an
energized state so that it can provide the best operating
conditions forthe electronic components and can keep some
of the important components from getting wet. If the power
supplyhasnotbeen used foralongtime,itshouldbevisually
inspected first, and if moisture is found in any internal
location, this part must be made dry before use. General
environmental conditions:
⚫Not for outdoor use.
⚫Keep away from flammable and explosive corrosive
media: such as alcohol, diluent, sulfuric acid and other
flammable and explosive corrosive materials.
⚫Keep away from heat sources and avoid exposure to the
sun.
⚫Operating environment temperature: 0℃~+50℃
⚫Storage environment temperature: -25℃~+65℃
⚫Keep away from boilers, humidifiers, water sources, etc.
⚫Working relative humidity:10~95%RH, no condensation.
⚫Storage relative humidity: not more than 80% (storage
in high humidity environments, it is recommended to run
the machine regularly for 20 minutes to avoid
condensation of water vapor).
⚫Keep away from strong electromagnetic interference
sources and significant vibration and shock.
⚫The working environment must be well ventilated and
free of dust. Please keep the area around the vent open

Chapter 1 Overview
7
within 30cm and without any sundries.
⚫Rapid changes in temperature must be avoided. Rapid
changes in temperature can cause water vapor to
condense inside the machine. When water vapor
condensation occurs, the use of this power supply is
prohibited.
⚫The input AC supply voltage fluctuates by ±10% of the
rated voltage.
⚫The product should not be placed in a restricted location
where the plug cannot be easily removed or the input
switch cannot be easily disconnected to prevent a
dangerous situation where the input cannot be
disconnected.
1.4.3 Input Wiring
The connection between the power supply and the mains needs
to use the attached power cord. If you need to use a different AC
line, please ensure that the cross-section of the line is at least
2.5mm 2 . The default input value of this series is 220V±10V, 16A,
50Hz.
Please make sure the input power is disconnected before
wiring. Due to the existence of leakage current, it can lead to
the enclosure being charged, the grounding terminal should
be well grounded to protect the safety of personnel.
The DC power input requires the connection of a circuit
breaker or fuse with a current rating of 1.25 times the
maximum input current of the power supply.
1.4.4 Output Wiring
1.4.4.1 Wiring Instructions
(1) Connection method when lead voltage drop compensation
function is not used
Connect the output terminals to the load as shown in Figure
2-1(a), and use the short route to connect the positive output
terminal to S+ and the negative output terminal to S-. At this
time, no compensation of lead voltage drop is performed,
and the voltage value displayed is the voltage at the output
of the power supply, not the voltage at both ends of the load.
(2) Connection method when using the lead voltage drop
compensation function

Chapter 1 Overview
8
Connect the output terminals to the load as shown in Figure
2-1(b), with the positive output and S+ connected to one end of
the load at the same time, and the negative output and S-
connected to the other end of the load at the same time, at this
time the displayed voltage value is the actual voltage at both
ends of the load, realizing the function of lead voltage drop
compensation.
No lead voltage drop compensation function Use of lead voltage drop
compensation function
(a) (b)
Figure 1-1 Output Wiring
If the output terminals of the power supply are not wired to the
load, but only the SENSE line is connected, the current flows
from the SENSE line and can damage the internal devices of
the power supply.
1.4.4.2 Battery Load Wiring Instructions
The TH6900 series constant power DC power supply can be
applied to battery type loads andmust be operated in accordance
with the following precautions in the process of use.
(1) Must be wired in accordance with Figure 1-2:
Figure 1-2 Battery Load Wiring Mode
(2) Connect a diode or DC contactor (diode module is
recommended) in series between the DC power supply and
the load (battery). Avoid causing damage to the DC power
supply and the battery.
(3) The diode is selected according to the following principles:
the minimum reverse withstand voltage value is 2~3 times the
output voltage of the DC test power supply; the minimum
+
-
S
+
S
-