Send RS232 commands via XIBO

I have read this item (a dozen times!) about RS232 and using commands to control the power of a monitor.
We are using a pro monitor from Samsung (I will check the version later). It has a RS232 connector.
But, maybe I am asking something silly, but, how do I connect this RS232 to the XIBO-player?
Do I need a cable like in the picture? Or don’t I need any additional hardware?

The second picture contains the commands I need to send to the monitor to control the power.

Hopefully someone can help me with this.
Regards. Peter

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