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CueServer Pro (CS-800) RS-232 Port Pinouts
What is the pinout of the RS-232 port on the CS-800 CueServer Pro?
The CueServer Pro (CS-800) has an RS-232 port available for connecting to external equipment. The jack on the back of CueServer is a Female DB-9 type connector. It's electrical connections are as follows:

RS-232 Pin
Signal
Pin 1
n/c
Pin 2
Transmit Data from CueServer
Pin 3
Receive Data to CueServer
Pin 4n/c
Pin 5Ground
Pin 6
n/c
Pin 7
n/c
Pin 8
n/c
Pin 9
Optional +5V Power Output

By default, Pin 9 is not internally connected (n/c). If desired, Pin 9 can be configured to output +5V DC by shorting a jumper on the CueServer Pro PCB immediately behind the DB-9 jack. This jumper is labelled "5V-P9" on the PCB.