The Gateway has two serial ports. one RS232 and one RS485. Both ports are optically isolated from the main computer circuit, but are not isolated from each other. In addition to insulation, they are also protected against surges
RS232
The RS232 port includes CTS and RTS signals in addition to TX and RX signals. The baudrate range for the RS232 port is 300bps to 230400bps . The port is protected by high-power TVS diodes against electrical surges.
RS485
The baudrate range for RS485 port is 600 bps to 460800 bps. Note that with a longer cable, the maximum speed may drop. It is recommended to use special cables designed for RS485. The port is protected by high-power TVS diodes against electrical surges.