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Appendix 2
The user is allowed to connect a custom keyboard controller to the SE-500MU 4K via RS-232
interface. The table below provides the RS-232 pinout on the device end (SE-500MU 4K).
Note that the RS-232 port is a 9 pin D-sub female connector.
You may download the RS-232 control protocol from the product page.
RS-232 Serial Port Pinout
Pin No.
Signal
Pin 1
GND
Pin 2
TXD
Pin 3
RXD
Pin 4
N/C
Pin 5
GND
Pin 6
GND
Pin 7
N/C
Pin 8
N/C
Pin 9
GND
13
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