FNIRSI DPS-150 English User Manual - FNIRSI Oscilloscopes Store in UK

⚠️ User Notice

Important Safety Information

Read all instructions carefully before operating the device
Follow all safety warnings and precautions
Use only specified power sources and accessories
Do not expose to water or moisture
Keep away from extreme temperatures and humidity
Disconnect power before maintenance or cleaning

Product Introduction

FNIRSI DPS-150 is a high-precision portable CNC DC power supply with advanced digital control capabilities. It features adjustable voltage and current output, multiple protection mechanisms, PC software control, and a compact portable design ideal for electronics development, testing, and maintenance work.

Key Features

Adjustable Output: 0-30V voltage, 0-5A current, up to 150W power
Dual Input Support: DC 5-30V and USB Type-C PD/QC fast charging
Multi-Protection: OVP, OCP, OPP, OTP, UVP, reverse polarity protection
High Precision: 0.01V voltage resolution, 0.001A current resolution
PC Software Control: Connect via USB for advanced control and monitoring
Data Presets: Save up to 6 groups of voltage/current settings
Compact Design: 106×76×28 mm, approximately 178g weight
Color Display: 2.8-inch LCD (320×240 resolution)

Panel Introduction

Front Panel Components

LCD Display: 2.8-inch color screen showing voltage, current, power, and settings
Output Terminals: 4.0mm banana jack connectors (red: positive, black: negative)
Control Knob: Rotary encoder for adjusting values and navigating menus
Function Buttons: Power, Output On/Off, Set, Menu navigation
LED Indicators: Power status, output status, protection status

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Input/Output Interface

DC Input: 5-30V DC power input jack
Type-C Input: USB Type-C port supporting PD and QC fast charging protocols
USB Data Port: Micro USB for PC software connection
Output Terminals: Standard 4.0mm banana jacks for test leads

Technical Parameters

Output Specifications

Parameter	Range/Value
Output Voltage	0-30V (adjustable)
Output Current	0-5A (adjustable)
Maximum Power	150W
Voltage Resolution	0.01V
Current Resolution	0.001A
Voltage Accuracy	±(0.5% + 2 digits)
Current Accuracy	±(0.5% + 2 digits)

Input Specifications

Parameter	Range/Value
DC Input Voltage	5-30V DC
Type-C Input	Supports PD and QC protocols
Recommended Input	24V/6A or higher for full power operation

Protection Features

Protection Type	Description
OVP (Overvoltage Protection)	Protects against output voltage exceeding set limit
OCP (Overcurrent Protection)	Protects against output current exceeding set limit
OPP (Overpower Protection)	Protects against power exceeding 150W
OTP (Overtemperature Protection)	Protects against excessive internal temperature
UVP (Undervoltage Protection)	Protects against input voltage too low
Reverse Polarity Protection	Input and output reverse connection protection

General Specifications

Display

2.8-inch color LCD (320×240)

Data Groups

6 preset memory groups

Dimensions

106 × 76 × 28 mm

Weight

Approximately 178g

Operating Temperature

0°C to 40°C

Storage Temperature

-10°C to 50°C

Operation Instructions

Power On/Off

Connect input power source (DC 5-30V or Type-C PD/QC)
Press and hold the power button for 2 seconds to power on
The display will show the welcome screen, then the main interface
To power off, press and hold the power button for 2 seconds

Setting Output Voltage

Ensure output is OFF (press Output button if needed)
Press the “SET” button to enter voltage setting mode
Rotate the knob to adjust voltage value (0-30V)
Press the knob or “SET” button to confirm
The set voltage will be displayed on screen

Setting Output Current

Ensure output is OFF
Press the “SET” button twice to enter current setting mode
Rotate the knob to adjust current value (0-5A)
Press the knob or “SET” button to confirm
The set current limit will be displayed on screen

Enabling/Disabling Output

After setting voltage and current, press the “OUTPUT” button
Output ON indicator will light up (green LED)
Display shows actual output voltage, current, and power
Press “OUTPUT” button again to disable output
Output OFF indicator will show (red LED)

Using Memory Presets

Memory Preset Operations

Saving a Preset:
- Set desired voltage and current values
- Press and hold “SET” button for 3 seconds
- Select memory group (1-6) using the knob
- Press knob to save settings
Loading a Preset:
- Press “MENU” button
- Select “Memory” option
- Choose desired preset group (1-6)
- Press knob to load settings

PC Software Use

PC Software Control Interface

Waveform Display and Data Logging

Software Installation

Download the PC software from www.fnirsi.cn
Extract the software package to your computer
Run the installer and follow on-screen instructions
Install any required USB drivers when prompted

Connecting to PC

Connect the DPS-150 to your computer using a Micro USB cable
Power on the DPS-150
Launch the PC software
Select the correct COM port from the dropdown menu
Click “Connect” button to establish communication
The software will display real-time data from the device

Software Features

Real-time Monitoring: View voltage, current, and power in real-time
Waveform Display: Graphical representation of output parameters over time
Data Logging: Record and export measurement data for analysis
Remote Control: Adjust voltage, current, and output from PC
Preset Management: Create, edit, and manage memory presets
Protection Settings: Configure OVP, OCP, OPP thresholds
Firmware Update: Update device firmware through software

🔄 Firmware Upgrade

Firmware Upgrade Process

Upgrade Procedure

Download Firmware: Get the latest firmware from www.fnirsi.cn
Connect Device: Connect DPS-150 to PC via USB cable
Launch Software: Open the PC software and connect to device
Enter Upgrade Mode:
- Click “Firmware” menu in software
- Select “Enter Upgrade Mode”
- Device will restart in upgrade mode
Select Firmware File: Browse and select the downloaded .bin file
Start Upgrade: Click “Upgrade” button and wait for completion
Complete: Device will restart automatically when finished

⚠️ Firmware Upgrade Warnings

Do not disconnect power or USB during upgrade
Ensure battery or power supply is sufficient
Do not power off the device during upgrade process
Use only official firmware from FNIRSI
Backup your preset data before upgrading

⚠️ Precautions

Safety Warnings

Always verify polarity before connecting loads
Do not exceed rated output specifications (30V, 5A, 150W)
Ensure adequate ventilation during operation
Do not operate in wet or humid environments
Keep away from flammable materials
Do not disassemble the device (no user-serviceable parts)
Use only specified input voltage range (5-30V DC)
Disconnect loads before adjusting settings

Operational Guidelines

Always start with lower voltage/current settings and increase gradually
Monitor load conditions and temperature during operation
Enable output only after verifying all settings
Use appropriate wire gauge for high current applications
Ensure secure connections to prevent arcing
Do not short-circuit output terminals
Allow device to cool down after extended high-power use

Maintenance and Care

Clean exterior with soft, dry cloth only
Do not use chemical cleaners or solvents
Store in cool, dry environment when not in use
Protect from dust, moisture, and extreme temperatures
Periodically check connections and cables for wear
Keep firmware updated for optimal performance

Production Information

Manufacturer Information

Company: FNIRSI Technology Co., Ltd.
Model: DPS-150
Product Name: Portable CNC DC Power Supply
Certifications: CE, FCC, RoHS compliant

Contact Information

Contact Method	Details
Official Website	www.fnirsi.cn
Support Email	support@fnirsi.com
Business Email	business@fnirsi.com
Phone	+86 0755-28020752
Address	Shenzhen, Guangdong, China

Resources and Downloads

User Manual: Available at www.fnirsi.cn
PC Software: Download from official website
Firmware Updates: Check website for latest versions
Tutorial Videos: Available on FNIRSI YouTube channel
Technical Support: Contact support@fnirsi.com

Quick Reference

Button Functions

Button	Function
Power (Long Press)	Power On/Off (2 seconds)
OUTPUT	Enable/Disable output
SET (Single Press)	Enter voltage/current setting mode
SET (Long Press)	Save to memory preset (3 seconds)
MENU	Open settings menu
Rotary Knob (Turn)	Adjust values
Rotary Knob (Press)	Confirm selection

LED Indicators

LED	Status	Meaning
Power LED	Blue	Device powered on
Output LED	Green	Output enabled
Output LED	Red	Output disabled
Warning LED	Red Flashing	Protection activated

Troubleshooting

Problem	Possible Cause	Solution
Device won’t power on	No input power / Low input voltage	Check power connection, ensure input voltage is 5-30V
No output voltage	Output disabled / OVP/OCP triggered	Press OUTPUT button / Check protection settings and reset
Output voltage unstable	Insufficient input power / Overload	Use higher capacity input / Reduce load
PC software can’t connect	Wrong COM port / Driver issue	Select correct COM port / Reinstall USB drivers
Device overheating	Inadequate ventilation / Excessive load	Improve airflow / Reduce power output
Current limit not working	Settings incorrect / Load issue	Verify current limit setting / Check load connection