27~29: ypbpr input, Vga input, Output – RGBLink VSP 516S User Manual User Manual
Page 28: 10/100m interface rj45, Power supply port of sending card, 19:usb control port of sending card, 20:dvi input, Audio output, Dvi output, Dvi +vga dvi output

2. Hardware Orientation
VSP 516S Back Panel
VSP 516S User Manual 28
EDID is HDMI, the DVI input can be compatible with HDMI 1.3.
(This connection can not support hot-plugging)
27~29: YPbPr
Input
R/Pr G/Y B/Pb BNC, support SD/HD analog video input, up to 1080p60.
30: VGA Input
VGA input, input the video signal from HD player and Computer, etc.
compatible with YPbPr signal, input signal via the DB15 interface.
OUTPUT
16.17: 10/100M Interface RJ45
Gigabit copper port, used to connect LED display.
18: Power Supply Port of Sending Card
Power has been already supplied by video processor itself, no external
power supply needed.
19:USB Control Port of Sending Card
20:DVI Input
Input the DVI out originating from other video processors.
(This DVI connector does not support hot-plugging)
31: AUDIO Output
It is used to access the speakers or audio power amplifier system. Can be
connected with the DVI output interface video processor directly.
(This connector does not support hot-plugging)
32: DVI Output
Connect to the monitor or LED display which has DVI interface.
(This connection can not support hot-plugging)
33: DVI +VGA DVI Output