996. Communication portsComputer portsThe UPS provides USB and RS232 communication ports. For practical applications,please use the communication cable provided by the accessory to connect to thecorresponding communication port.RS-232 port communication default parameters:2400, 8, 1, 0.(The baud rate is 2400,8 data bits, 1 stop bit, no parity)If USB and RS232 are connected at the same time, USB communication priority.EPO (Emergency Power Off)EPO on the rear panel of UPS, disconnecting the EPO can cut off the output of theUPS. Need to resume UPS work:• Reconnect EPO• Continuously press button to confirm UPS is shut down to bypass or no output.• Continuously press button to restart.Dry in & Dry outDry in is optical coupling input interface, which is connected to an external switch.After custom setting the dry contact input function, it can perform operations suchas power on and power off.