Industrial Modbus RTU 8-ch Relay Module (B) with RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply Features Configurable device address (1~255), multi devices can be cascaded on RS485 bus Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically 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 Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection Rail-mounted ABS plastic enclosure, easy to install, safe to use High quality relay, contact rating: =10A 250VAC/30VDC 3 LEDs for indicating the MCU status and signal transceiving status How-to-use document/User Manual ://bit.ly/491mVCZ Package Content Modbus RTU Relay (B) x1 FAQ 1.Question:Support USB to RS232,RS485 and TTL at the same time? Answer: Not supported, only USB to one of the three, USB to RS232, RS485, or TTL. It is not possible to simultaneously convert RS232, RS485, and TTL to USB. 2. Question:Does it support RS232,RS485 and TTL interchange? Answer:Not supported, RS232, RS485 and TTL can not be interchangeable, support USB to RS232, RS485, or TTL.

Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection. High quality relay, contact rating: =10A 250VAC/30VDC. Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit. Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability. 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 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. RS485 Communication: Configurable device address (1~255), multi devices can be cascaded on RS485 bus. Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically.