Waveshare Modbus RTU 32-Ch Relay Module, RS485 Interface, with Multiple Isolation Protection Circuits, Industrial-Grade, Rail-Mount Case

Configurable device address (1~255), multi devices can be cascaded on RS485 bus. Features flash-on, flash-off function, it is possible to turn on the relay for a while and then close it automatically via the command ^^ Onboard voltage regulator chip, supports 7~36V wide voltage power supply. Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal ^^ Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption. Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic ^^ Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit.

Onboard dedicated relay driver chip, with built-in freewheeling diode protection, the driving ability is stronger and more stable ^^ Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection. High quality relay, contact
rating: 10A 250VAC/30VDC. Rail-mounted ABS case, easy to install, safe to use. 3 LEDs for indicating the MCU status and signal transceiving status