Product Description : The SE-RM-19-RS485-USB-08 USB-to-Octal RS485 Serial Adapter is designed to make serial port expansion simple. Connecting to a USB port on your PC, the USB Serial Adapter adds 8 RS485 serial communication ports to your system. By taking advantage of the USB bus, the USB Serial Adapter makes it easier to add serial ports and serial devices to your system Extra 2 USB Ports give you a scalable way to increase your serial port count and expand as your needs grow Providing full control of your serial components from a single device, the USB serial hub is ideal for a multitude of applications including: industrial automation, IOT applications, ..etc The hub features COM port retention, which retains the assigned serial COM port values. This ensures that the same values are automatically re-assigned to the port provided by the adapter, in the event it is disconnected and re-connected to the host computer. With FTDI USB-to-serial chipset, which provides easy installation into a broad range of operating systems. Features / Specifications : Convert a USB port into 8 RS485 serial ports in an industrial rack-mountable chassis 2 Extra USB Ports for daisy chain multiple hubs USB to RS485 port adapter with FTDI chipset and COM port retention 19 Inch 1U Rackmountable metal chassis RS485 multiplexer with 921.6 Kbps baud per port Gain 8 RS485 serial port interfaces through a single USB port 256-byte transmit, 128-byte receive FIFO Durable metal chassis USB 2.0 compatible UART Interface supports 7/8 bit data, 1/2 stop bits, and Odd/Even/Mark/Space/No Parity Extended industrial operating temperature range Package Content : 1 x 8 Port USB to RS485 Adapter 1 x Switching Power Adapter ( 5V 2A) USB 2.0 Cable User Manual 2 x Server Mounng Bracket & Screws 8 x Screw Terminals