WDCU3003M uA-3A30V DC Voltage Current Display Voltage Current Meter Supports Modbus Communication

Attention:
- Before shipment, all products have passed tests.
- After receiving the products, please see the wiring method before wiring. Due to wrong connection by users, wrong operation or DIY changes, products are not guaranteed!
- There is no rear cover, be sure to pay attention to safety operation. The store is not responsible for the consequences caused by not operating according to the specifications!

Description:
Modbus version has a communication function. With RS-485 interface, it can be connected to a PC with host computer software to collect data. It can also communicate with PLC, DCS, smart meters and other devices!

Specifications:
- Can measure voltage, current and power. With alarm output (can be connected to indicator light, buzzer and relay output)
- Power supply: DC 7-24V (power supply cannot be lower than 7V, otherwise the measured value will be inaccurate)
- Measuring voltage range: DC 0.001-30V/DC 0.001-100V,optional
- Measuring current range: 1uA-3A/1uA-10A,optional (minimum resolution 1uA. Below 3mA, the range will switch automatically. 1uA is displayed as 0.001mA. Large current range is recommended to work about 70%. Do not use short circuit or limit overload)
- Accuracy: current 0.5%±3 digits; voltage 0.5%±3 digits
- Zone alarm: can set the alarm in the interval and outside the interval
- Alarm setting: low voltage, high voltage, low current, high current alarm, shielding voltage and current alarm range can be set
- Support standard Modbus RTU protocol, with RS-485 communication interface
- Modbus sampling can reach 50ms/time at the fastest, about 20 times in 1 second
- Modbus communication protocol function can set 1-254 device addresses
- Product size: 79 x 43 x 33mm/3.1 x 1.7 x 1.3"
- Hole spacing: 76 x 39mm/3 x 1.5"
- Weight: 42g/0.1lb

Package Included:
- 1 x Voltage current display
- 1 x Power cable with XH2.54 connector
- 1 x Alarm cable with PH2.0 connector
- 1 x Communication cable with PH2.0 connector

Modbus Test:
1. Connect hardware:
Connect RS485 serial port, A connects A, and B connects B. Connect the power supply, measured voltage and load according to the wiring diagram.

2. Software Settings:
- Set the serial port number in the "Communication Settings" column. The default baud rate is 9600. Click to open the serial port.
- In the "Module address change" field, you can set the communication address (the default address is "1". If you do not know the address, you can change the address directly.)
- Click the "Collect" command in the "Collection" column.
- If a "communication error" occurs, check whether the A and B sides of the RS485 interface are connected reversely.