Functions of RS485 and MON ports on the CMU of an S series switch

The RS485 and MON ports (using RJ45 connectors) on the CMU are reserved for function expansion in the future.

For example, if the switch supports external PoE, the RS485 port connects to the external PoE power module.
If the switch supports external environment monitoring, the MON port connects to the sensors (such as temperature sensors and smoke sensors) as an input port for environment monitoring.

The preceding functions are used as examples to describe the port functions, and they are not supported by S switches currently.

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