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Appendix 3
The user is allowed to connect a custom keyboard controller to the SE-4000 via RS-232
interface (the user may also enable RS-422 if necessary). The table below provides the RS-232
serial port pinout on the device end (SE-4000). Note that the RS-232 port is a 9 pin D-sub
female connector.
Pin No.
You may download the RS-232 control protocol from the product page.
RS-232 Serial Port Pinout
Signal
Pin 1
GND
Pin 2
TXD (RS-232)
Pin 3
RXD (RS-232)
Pin 4
GND
Pin 5
GND
Pin 6
GND
Pin 7
TXD (RS-422)
Pin 8
RXD (RS-422)
Pin 9
GND
121
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