YLF-BT-0082 LCD Voltage Meter Voltmeter Ammeter Display w/ RS485 Port For 10A 100V MODBUS Protocol

YLF-BT-0082 LCD Voltage Meter Voltmeter Ammeter Display w/ RS485 Port For 10A 100V MODBUS Protocol

Note:
This version is for 10A 100V MODBUS. It is powered independently. Please pay attention to its wiring diagram.

Link for PC Software and Protocol Description:
http://pan.baidu.com/s/1eSC3BDS

Attention:
- Professional knowledge is highly recommended.
- After receiving the goods, please read and understand the wiring method and then power on and test it before soldering.



Version Introduction:
With RS485 communication interface, it is the version for MODBUS. It can use the host computer software to collect data, and also communicate with PLC, DCS, smart meters and other equipment!

Calibration Instructions:
The meter has a calibration function, so there is no need to worry about inaccurate measurement display. If you find that the display is not accurate, you can use the following method to calibrate. After receiving the product, it is recommended to perform a calibration according to the following method.

Calibration Method:
First use a multimeter to measure the precise value of measured voltage, then connect the measured voltage to our meter head, press two buttons at the same time to enter calibration mode. Adjust -Button and + Button to make the displayed voltage the same as the voltage measured by the multimeter. For example, if the multimeter measures 12.65V, adjust the displayed voltage to 12.65V by pressing the buttons. After three seconds, it will automatically save and exit.

Measurement Instructions:
Please read carefully! Measured voltage can be set to independent power supply and non-independent power supply modes. There is a black jumper cap on the module, plug it in to indicate non-independent power supply, and unplug it to indicate independent power supply. Wiring methods of these two ways are different, please read wiring diagrams clearly before using! Do not connect wrong wires, or the voltmeter may burn out. Non-independent power supply means that the supply voltage of the module is the measured voltage (5-30V). Independent power supply means that the module power supply and the measured voltage are separated. At this time, the module power supply voltage is 5-24V, and the maximum measured voltage is the purchased voltage value (standard 30V is 0-30V, 100V is 0-100V).

Note: The 10A 100V version can only use independent power supply connection!



Specifications:
- Can measure voltage, current and ambient temperature at the same time
- Voltage range: 0-100V
- Current range: 0-10A (please strengthen heat dissipation when the temperature of large current exceeds 60℃)
- Temperature range: -10 to 100℃ (accuracy 1%)
- Accuracy: 1% (±1 digit, the larger the voltage and current range, the lower the accuracy)
- Support for standard Modbus RTU protocol, communication way RS485
- Voltage and temperature are switched to display (Voltage and temperature can be switched through the button on the back)
- With protocol function, 1 to 255 device addresses can be set by the upper computer software;
- Product size: 47.8*28.8*30MM
- Installation opening: 45*25.5MM
- Weight: 24G

Package Included:
- 1 x Voltmeter Ammeter For 10A 100V MODBUS

Interface Description:
- Terminals A and B are marked as RS485 interface, used for Modbus communication.
- GND is voltage -. IIN measures the negative pole of current load. VCC is the positive pole of power supply under test when it is not independently powered, and the positive pole of module power supply when it is independently powered. When VIN is independently powered, it is the positive electrode of the voltage to be measured and the positive electrode of the load.

Wiring Diagram For Measuring Voltage and Current:

Test Instructions For Modbus:
1. Connect Hardware:
- Connect RS485 serial port, A connects A, B connects B, connect the measured voltage.

2. Software Settings:
- Set serial port number in "Communication Settings" and open the serial port.
- Set the module address in "Analog acquisition" item (The default address is "1". If you don't know the module address, you can change the module address in the "Module Address Change" item)
- Click "Acquisition" command in "Analog acquisition".
- If a "communication error" occurs, confirm whether the A and B terminals of RS485 interface are reversely connected.