DC Voltmeter Ammeter with MODBUS Protocol [3A , 30V]

The digital voltage and current monitoring module with RS485 output and Modbus protocol is an advanced solution for viewing voltage and current in DC systems. This device measures voltage between 5 and 30 volts and current up to 3 amperes and displays the information digitally on the internal display. The compact dimensions of 51x15x5 millimeters provide the possibility of easy installation in panels and industrial systems, and the temperature range of -20 to 100 degrees Celsius guarantees operation in different environmental conditions. The voltage and current display with RS485 output provides the ability to communicate with a computer and PLC for data collection and information analysis. The standard Modbus RTU protocol creates wide compatibility with industrial equipment and monitoring software. This module measures and displays current and voltage simultaneously, and the current can be viewed in a separate row. Automatic switching between voltage and current display with the ability to adjust through the device's buttons simplifies viewing operational data.

The 3-ampere voltage and current display module measures the current of small to medium systems with an accuracy of ±1 percent and is suitable for industrial and research projects. The DC voltage and current measurement module with an RS485 port provides the possibility of quick connection to data collection and logging equipment. The ID of each device in the RS485 network can be set between 1 and 255, and the measured data can be analyzed and saved with special software.

The industrial digital current and voltage measurement module is used in energy control, monitoring of electrical equipment, and automation projects. The non-isolated design provides the possibility of measurement without the need for an external power source. The performance of the non-isolated ammeter and voltmeter guarantees high measurement accuracy, and the collected data can be used for long-term analysis. Connecting to the RS485 port while observing the order of pins A and B creates reliable communication with external systems.

Interface Description:

Left side pin A, B-side for the RS485 interface for Modbus communication

lower side GND voltage is negative, IIN measurable current use, the VCC when independent power supply module for the power supply positive, the non-independent power supply voltage for the positive test, the VIN independent power supply voltage is positive.

Software settings:

In the "Communication Settings" set the serial number, open the serial port.

In the "Analog capture" item set module address ( default address is "1", in the case of unknown module address, you can "change the module address" item of the module address changes )

In the "Analog capture" click "acquisition" command on it.

As a "communication error" to confirm RS485 interfaces A, B whether the reverse side.

Calibration method:

Connect precise 12V (100V independent power supply for 30V) when the power is short-circuited temperature-sensitive resistor for 5 seconds, the screen will blackout, disconnect the power to connect the calibration Well, pay attention to 12V power supply must be accurate, otherwise calibrated also not allowed.

MODBUS DC Voltmeter Applications:

1. - Monitoring current and voltage of DC systems
2. - Energy control of industrial equipment
3. - Data collection and analysis with PLC and computer
4. - Precise measurement of voltage and current up to 3 amperes
5. - Support for Modbus RTU protocol and RS485 network

MODBUS DC Voltmeter Specification:

1. - Device model: YLF-BT-0082
2. - Communication protocol: Standard Modbus RTU
3. - Communication port type: RS485 with the ability to connect to PLC and computer
4. - Voltage measurement range: 5 to 30 volts DC
5. - Current measurement range: 0 to 3 amperes DC
6. - Operating temperature range: -20 to 100 degrees Celsius
7. - Measurement accuracy: 1 percent tolerance ±1 unit
8. - Number of adjustable IDs: 1 to 255 separate addresses through software
9. - Power supply type: Non-isolated, power supplied from the source being measured
10. - Display capabilities: Automatic switching between voltage and current with a dedicated current row
11. - Calibration capability: Manual calibration system with a 12-volt reference voltage
12. - Internal converter: High-precision analog-to-digital ADC
13. - Shunt type: Internal shunt resistor for linear current measurement
14. - Input and output pins: Terminals A, B for the network and VCC, GND, VIN for power
15. - Product dimensions: 48x29x21 millimeters