Fangrui Product Details Supports Usb Expansion Of 8-way Isolated Rs485 Communication Interface, Which Is Convenient For Users To Access Multiple Rs485 Serial Port Devices. Supports Type-c Direct Power Supply, And Also Reserves A 5v-36v Dc Wide Voltage Auxiliary Power Supply Interface. Onboard Integrated Power Isolation Can Provide Stable Isolation Voltage. Onboard Integrated Digital Isolation Can Be Used For Signal Isolation, With High Reliability, Strong Anti-interference And Low Power Consumption. Onboard Tvs (transient Voltage Suppression Tube) Can Effectively Suppress Surge Voltage And Transient Spike Voltage In The Circuit, Lightning-protection And Anti-static. Onboard Self-recovery Fuse And Protection Diode Can Ensure Stable Output Of Current And Voltage, Prevent Overcurrent And Overvoltage, And Improve Impact Resistance. The 120r Terminal Resistor Of The Onboard Rs485 Interface Can Be Modified Through The Jumper Cap Setting, And The Switching Is Flexible. The External Led Indicator Is Convenient For Viewing The Power Su