Feature: 1. Intelligent RS485 bus control, zero delay transceiver conversion circuit, support automatic induction of data direction and flow control 2. Intelligent baud rate control, adopt industrial FT232 chip, support baud rate settings 3. Transient suppression, signal interface provides 600W thunder surge protection and additional limiting protection, preventing module damage caused by error wiring 4. The USB port is isolated from four RS485 to provide 1.5kV full isolation protection. Meet industrial control, building complex wiring requirements 5. Easy to use and assemble, only USB lines can work without external power supplies. External 5V auxiliary power is only required when a large amount of external load or low power supply is insufficient 6. Industry standard rail installation with bolt terminal, convenient for product wiring, maintenance and transformation Specification: Item Type: USB to RS-485 Converter Material: ABS Model: YN-861 Interface Features: Compatible with EA / TIA RS-485 standard Electrical Interface: RS-485 bolt terminal Interface Protection: RS-485 600W thunder surge protection and overcurrent protection Transmission Medium: Twisted pair or shield twisted pair Number of Nodes: Up to 256 Terminal Resistance: External connection Transmission Rate: 300bps - 115.2kbps Power Consumption: 1W at DC5V (USB power) Isolation Performance: 1.5kV isolation between four channels and USB Transmission Distance: 1200meter (4000ft) at 19.2kbps. The actual situation is affected by the wiring method, the number of nodes, and the transmission rate Status Indicators: Onboard transceiver indicator real-time display Working Temperature: -20℃ ~ 65℃ Work Humidity: 25% ~ 85% (no condensation). Package List: 1 x Hub1 x USB Cable Interface1 x User Manual Note: 1. You can work with the USB cable and without an external power supply. 2. External 5V auxiliary power supplies are required only when the external large amount of load or less power is insufficient.3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.