Many applications in Industrial PLC or SCADA communication require multiple Slave devices to be shared with 2 (two) Masters. Alternatively, Single Master wants to communicate with multiple slave devices. Serial Redundancy Switch (SRS) has been designed to cater to this specific requirement. It is Protocol independent & has different operating modes. The Serial communication parameters are field selectable using DIP switch. All ports of this product are RS485 2 Wire with built in termination resistor. This product does not act as protocol converter gateway. It acts as Hub or Splitter switch for RS485 ports.