Tenma 72-2535 User manual

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Digital-Control and Programmable
DC Power Supply
User Manual
Part Number: 72-2535, 72-2540, 72-2545, 72-2550,
72-2925, 72-2930, 72-2935, 72-2940 & 72-10480

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Important Safety Information
Please read these instructions carefully before use and retain for future reference.
The following safety symbols may appear in this manual or on the series:
Symbol Meaning
Warning
Danger - High Voltage
Earth (Ground) terminal
• Do not block or obstruct the opening to the cooling fan vent.
• Avoid severe impacts or rough handling as it could lead to damage.
• Do not discharge static electricity.
• Do not disassemble unless you are qualied as service personnel.
AC Input
• AC input voltage: 110V / 120V / 220V / 230V, 50/60Hz.
• Connect the protective grounding conductor of the AC power cord to an earth ground, in order to avoid electrical shock.
Operation Environment
Location Indoor, no direct sunlight, dust free, almost non-conductive pollution
Relative Humidity <80%
Altitude <2000m
Temperature 0 to 40°C
Storage Environment
Location Indoor
Relative Humidity <70%
Temperature -10°C to +70°C
Fuse
Part Number 110V / 120V 220V / 230V
72-10480 T4A/250V (20x5mm) T2A/250V (20x5mm)
72-2535 T5A/250V (20x5mm) T2A/250V (20x5mm)
72-2540 T5A/250V (20x5mm) T3A/250V (20x5mm)
72-2545 T5A/250V (20x5mm) T3A/250V (20x5mm)
72-2550 T5A/250V (20x5mm) T3A/250V (20x5mm)
72-2925 T10A/250V (20x5mm) T5A/250V (20x5mm)

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Part Number 110V / 120V 220V / 230V
72-2930 T10A/250V (20x5mm) T5A/250V (20x5mm)
72-2935 T10A/250V (20x5mm) T5A/250V (20x5mm)
72-2940 T10A/250V (20x5mm) T5A/250V (20x5mm)
• Avoid the risk of re by only replacing the fuse with the specied type and rating.
• Disconnect the power before replacing the fuse.
• Make sure the cause of the fuse blowout is xed before replacing the fuse.
Series Lineup/Main Features
Part Number V Meter A Meter USB Resolution
72-10480 4 digit 4 digit No 10mV/1mA
72-2535 4 digit 4 digit Yes 10mV/1mA
72-2540 4 digit 4 digit Yes 10mV/1mA
72-2545 4 digit 4 digit Yes 10mV/1mA
72-2550 4 digit 4 digit Yes 10mV/1mA
72-2925 4 digit 4 digit No 10mV/1mA
72-2930 4 digit 4 digit Yes 10mV/1mA
72-2935 4 digit 4 digit No 10mV/1mA
72-2940 4 digit 4 digit Yes 10mV/1mA
Performance
• Low noise: cooling fan controlled by heatsink temperature.
• Compact size, light weight.
Operation
• Constant voltage/constant current operation.
• Output on/o󰀨 control.
• Digital panel control.
• 4 pairs of panel setup save/recall.
• Coarse and ne voltage/current control.
• Software calibration.
• Beep output.
Key lock function.
• Protection
• Overload protection.
• Reverse polarity protection.
• Short circuit protection.
Interface
• USB/RS232 for remote control (only for 72-2535, 72-2540, 72-2545, 72-2550,
• 72-2930 and 72-2940

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Front Panel Overview
Display
Condition Indication
• OVP is the indicator of overvoltage protection.
• When the overvoltage function is turned on the “ ” indicator lights up.
• When the output voltage is higher than the protection setup value, due to unexpected conditions, the output cuts o󰀨 and
the OVP indicator ickers.
• Press the OVP key again and the power supply will recover.
OCP is OCP indicator. When overcurrent function is turned on, the
OCP indicator light turns on.
C.C is the constant current indicator. When the power supply is in the
mode of constant current, the light will be on.
C.V is the constant voltage indicator. When the power supply is in the
mode of constant voltage, the light will be on.
OUT is output indicator. If the light is on then there is a voltage output
in the output terminal.
Storage Indication
• Indication of saving and recalling ve setups stored internally.

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Brief Introduction of Panel Operation
Operation
Connect the AC power cord and select the corresponding AC voltage according to the back label, then
connect the AC power cord to the socket on the back panel.
Press the power switch to turn the power on. The display initialises, showing the model of the machine
and then the setting level, which is recalled from the last use.
Press the power switch again to turn the power o󰀨.

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Output ON/OFF
Panel Operation
• The key LED will turn on once you have pressed the “output” key to turn output on.
• The key LED will then turn o󰀨 once you have pressed the “output” key again to turn o󰀨 output.
Note: If there are any of the following conditions, the output will automatically turn o󰀨:
• OVP means there is abnormal high voltage output or input on the output terminal.
• When OCP is on, the output current reaches the setting current value.
• Recalling other setups from the memory
Beep ON/OFF
• By default, the beep sound is enabled.
• To turn o󰀨 the beep, press the OCP (BEEP) key for two seconds.
• A beep sounds, meaning the beep setting will be turned o󰀨.
• To enable the beep, press the OCP (BEEP) key for two seconds again.
Front Panel Lock
Press the LOCK key to lock the front panel key operation. The key LED will turn on.
To unlock, press and hold the LOCK key for two seconds.
Output Setup
Panel Operation
• Connect the load to the front port, CH1 +/-.
• Press the Voltage/Current key to switch between the voltage adjustment and current adjustment. Adjust the voltage and
current with the Voltage/Current adjustment knob.
• By default, the voltage and current knob work in coarse mode. In order to activate in ne mode, press the key to choose
between coarse or ne mode.
• Turning on the output and pressing the output key will turn on the key LED and display CV or CC mode.
Save Setup
Background The front panel settings can be stored into one of the four internal
memories
Contents
The following list shows the setup contents:
• Fine/coarse knob editing mode
• Beep on/o󰀨
• Output voltage/current level
The following settings are always saved as “o󰀨”:
• Output on/o󰀨
• Front panel lock on/o󰀨
Panel Operation
Press one of the four buttons (M1, M2, M3, M4) and the LED light
turns on accordingly. After adjusting the value, it is automatically
saved, once the LED light stops blinking.

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Recall Setup
The front panel settings can be recalled from one of the four internal memories.
Press any button of M1 to M4.
For example, the memory of the panel setting is recalled in M1.
After you recall M4, rotate the shuttle knob and then M5 is recalled.
If the memory indicator is lit on the panel of lights, then the current memory is recalled.
Note: When a setting is recalled the output automatically turns o󰀨.
Remote Control
All models can be connected to a computer through interfaces USB/RS232 on the back of the machine and controlled by the
remote control.
COM setting
Set up the COM port inside the computer according to the following list:
• Baud rate: 9600
• Parity bit: None
• Data bit: 8
• Stop bit: 1
• Data fow control: None
Functionality Check
• Run this query command via the terminal application, such as MTTTY (Multithreaded TTY).
• This should return the idenitifcation information: Manufacturer, model name,
serial number, TENMA 72-2535 SN:xxxxxxxx Vx.xx
Entering the Remote Control Mode:
• Connect the USB.
• The power supply will automatically connect. After a normal connection, there will be a beep from the power supply itself.
• The panel keys are locked, so the power supply can only rely on the remote control.
Exiting from the Remote Control Mode:
• Close the remote control software.
• Disconnect the USB from the back.
• The power supply disconnects. You will hear a beep, which hints that the remote control mode has been exited.
• The power supply automatically comes in the panel control mode.
Series Remote Control Syntax V2.0
Command format: VSET<X>:<NR2>
1. VSET: command header
2. X: output channel
3. : separator

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4. NR2: parameter
Command Details:
1. ISET<X>:<NR2>
Description: Sets the output current.
Example :ISET1:2.225
Sets the CH1 output current to 2.225A
2. ISET<X>?
Description: Returns the output current setting.
Example: ISET1?
Returns the CH1 output current setting.
3. VSET<X>:<NR2>
Description: Sets the output voltage.
Example VSET1:20.50
Sets the CH1 voltage to 20.50V
4. VSET<X>?
Description : Returns the output voltage setting.
Example VSET1?
Returns the CH1 voltage setting
5. IOUT<X>?
Description : Returns the actual output current.
Example IOUT1?
Returns the CH1 output current
6. VOUT<X>?
Description : Returns the actual output voltage.
Example VOUT1?
Returns the CH1 output voltage
7. BEEP<Boolean>
Description : Turns on or o󰀨 the beep. Boolean: boolean logic.
Example BEEP1 Turns on the beep.
8. OUT<Boolean>
Description : Turns on or o󰀨 the output.
Boolean: 0 OFF,1 ON
Example: OUT1 Turns on the output
9. STATUS?
Description : Returns the POWER SUPPLY status.
Contents 8 bits in the following format
Bit Item Description
0 CH1 0=CC mode, 1=CV mode
1 CH2 0=CC mode, 1=CV mode
2, 3 Tracking 00=Independent, 01=Tracking series,11=Tracking parallel
Part Number 72-10480/
72-2535 72-2540 72-2545/ 72-2550
72-2925/
72-2930
72-2935/
72-2940
Voltage Range 0-30V 0-30V 0-60V 0-30V 0-60V
Current Range 0-3A 0-5A 0-2A (72-2545)
0-3A (72-2550) 0-10A 0-5A
Load Regulation
Voltage Current
≤0.01%+2mV
≤0.1%+5mA
≤0.1%+10mA
(72-2535)
≤0.01%+2mV
≤0.1%+5mA
≤0.01%+2mV
≤0.1%+5mA
≤0.01%+3mV
≤0.1%+20mA
≤0.01%+2mV
≤0.1%+10mA
Line Regulation
Voltage Current ≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
Setup Resolution
Voltage Current 10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
Setup Accuracy (25°C to -5°C)
Voltage Current ≤0.5%+20mV
≤0.5%+5mA
≤0.5%+20mV
≤0.5%+10mA
≤0.5%+30mV
≤0.5%+5mA
≤0.5%+20mV
≤0.5%+20mA
≤0.5%+30mV
≤0.5%+10mA
Ripple (20-20m)
Voltage Current ≤1mVrms
≤3mArms
≤2mVrms
≤3mArms
≤1mVrms
≤3mVrms
≤2mVrms
≤5mVrms
≤1mVrms
≤3mVrms
Temperature Coe󰀨cient
Voltage
Current
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
Read Back Accuracy
Voltage Current 10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
Read Back Temperature Coe󰀨cient
Voltage
Current
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
Reaction Time
Voltage Rise
Voltage Drop
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
Interface: Interfaces (for programmable models only): RS232, USB
Accessories: User manual and power cord

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4 Beep 0=O󰀨, 1=On
5 Lock 0=Lock, 1=Unlock
6 Output 0=O󰀨, 1=On
7 N/A N/A
10. *IDN?
Description : The power supply identication returns
Example *IDN?
Contents TENMA 72‐2535 V2.0 (Manufacturer, model name,).
11. RCL<NR1>
Description : Recalls a panel setting.
NR1 1 – 5: Memory number 1 to 5
Example RCL1 Recalls the panel setting stored in memory number 1
12. SAV<NR1>
Description : Stores the panel setting.
NR1 1 – 5: Memory number 1 to 5
Example : SAV1 Stores the panel setting in memory number 1
13. OCP< Boolean >
Description : Stores the panel setting.
Boolean: 0 OFF,1 ON
Example: OCP1 Turns on the OCP
14. OVP< Boolean >
Description : Turns on the OVP.
Boolean: 0 OFF,1 ON
Example: OVP1 Turns on the OVP
Specications
Note: The specications in the table below have all been tested in temperatures ranging from 25°C down to -5°C, and after
being warmed up for 20 minutes.
Part Number 72-10480/
72-2535 72-2540 72-2545/ 72-2550
72-2925/
72-2930
72-2935/
72-2940
Voltage Range 0-30V 0-30V 0-60V 0-30V 0-60V
Current Range 0-3A 0-5A 0-2A (72-2545)
0-3A (72-2550) 0-10A 0-5A
Load Regulation
Voltage Current
≤0.01%+2mV
≤0.1%+5mA
≤0.1%+10mA
(72-2535)
≤0.01%+2mV
≤0.1%+5mA
≤0.01%+2mV
≤0.1%+5mA
≤0.01%+3mV
≤0.1%+20mA
≤0.01%+2mV
≤0.1%+10mA
Line Regulation
Voltage Current ≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
≤0.01%+3mV
≤0.1%+3mA
Setup Resolution
Voltage Current 10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA

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Important Notice : This data sheet and its contents (the “Information”) belong to the members of the AVNET group of companies (the “Group”) or are licensed to it. No licence is granted for
the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change
without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness,
any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make
any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or
where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its
negligence. TENMA is the registered trademark of Premier Farnell Limited 2019.
Part Number 72-10480/
72-2535 72-2540 72-2545/ 72-2550
72-2925/
72-2930
72-2935/
72-2940
Setup Accuracy (25°C to -5°C)
Voltage Current ≤0.5%+20mV
≤0.5%+5mA
≤0.5%+20mV
≤0.5%+10mA
≤0.5%+30mV
≤0.5%+5mA
≤0.5%+20mV
≤0.5%+20mA
≤0.5%+30mV
≤0.5%+10mA
Ripple (20-20m)
Voltage Current ≤1mVrms
≤3mArms
≤2mVrms
≤3mArms
≤1mVrms
≤3mVrms
≤2mVrms
≤5mVrms
≤1mVrms
≤3mVrms
Temperature Coe󰀨cient
Voltage
Current
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
Read Back Accuracy
Voltage Current 10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
10mV
1mA
Read Back Temperature Coe󰀨cient
Voltage
Current
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
≤150ppm
Reaction Time
Voltage Rise
Voltage Drop
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
≤100mS
≤100mS
(10% rated load)
Interface: Interfaces (for programmable models only): RS232, USB
Accessories: User manual and power cord
Part Number Dimensions Weight
72-10480 / 72-2535 285mm×110mm×165mm 3.6kg
72-2540 / 72-2545 285mm×110mm×165mm 4.3kg
72-2550 285mm×110mm×165mm 4.8kg
72-2925 / 72-2930 305mm×110mm×165mm 8.3kg
72-2935 / 72-2940 305mm×110mm×165mm 8kg
INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF ELECTRICAL & ELECTRONIC EQUIPMENT
When this product has reached the end of its life it must be treated as Waste Electrical & Electronics Equipment
(WEEE). Any WEEE marked products must not be mixed with general household waste, but kept separate for
the treatment, recovery and recycling of the materials used. Contact your local authority for details of recycling
schemes in your area.
Made in China. PR2 9PP
V1.0