Supports setting device addresses (1–255) to cascade multiple devices via RS485 bus. Onboard voltage regulator supports input voltage range of 7V to 36V. Onboard power isolation provides stable isolated voltage; no external power supply required at the isolation terminal. Onboard optocoupler enables signal isolation for high reliability and strong noise immunity. Onboard resettable fuses and TVS diodes suppress surge voltages and transient spikes, providing overcurrent, overvoltage, lightning, and ESD protection. Includes a 0.0022Ω, 1% tolerance shunt resistor and 16-bit high-precision analog-to-digital conversion for bidirectional current measurement. Maximum voltage measurement: 36V. Maximum current measurement: 8A. Supports direct power measurement. DIN-rail mounted housing allows stacking and modular installation for convenience and safety. Three external LED indicators show MCU status and signal transmission/reception status. Color: As shown. Material: Plastic. Package includes: 1 × Modbus RTU Module. Other accessories are not included. Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.