Modbus RTU Protocol

Voltage & Current Monitoring

DC 7~36V Wide Voltage

16-bit High-Precision Acquisition

Multiple Isolation Protection Circuits

This product is an industrial-grade DC monitoring module supporting 4-channel measurement. Adopts Modbus RTU protocol with built-in protection circuits such as power isolation, optocoupler isolation, resettable fuse, and TVS.

• Configurable device address (1~255), multi devices can be cascaded on RS485 bus
• Onboard voltage regulator, supports 7~36V wide range power supply
• Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
• Onboard optocoupler isolation, allows signal isolation, high reliability, strong anti-interference
• Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
• Onboard 0.002Ω ±1% current sense resistor with 16-bit high-precision acquisition, capable of bidirectional current measurement
• Supports voltage measurement up to 36V and current measurement up to 8A, with direct power measurement
• Rail-mount case design, supports stacking combination, easy to install and safer to use
• 3x LEDs for indicating the MCU status and signal transceiving status

Supports sending Modbus RTU commands via RS485 to measure DC current, voltage, and power data

Onboard power and signal dual isolation for RS485 communication, provides stable isolation voltage, features high reliability and strong anti-interference performance. Built-in TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, lightningproof & ESD protection. Built-in resettable fuse and protection diode, provides over-current and over-voltage proof, improves shock-proof performance, suitable for industrial environments with high requirements.

INx+ and INx- represent the current input and output terminals.The module measures the differential voltage across the current sense resistor connected in series between INx+ and INx- to determine the current flowing through the circuit.The module supports bidirectional current measurement.

Built-in fuse and anti-reverse protection, With Power and Signal Dual Isolation

Supports 35mm standard guide rail, with rail-mount buckle, easy to install