User manual

User Manual Rev 1.0 17
17 Emergency Some monitor models have an Emergency button on
the front panel. This is the open-drain output
controlled by the button. If not required, do not
connect.
18 -- reserved
19 -- reserved
20 -- reserved
21 -- reserved
22 RED GND Return for Red video signal. See pin 6 description.
23 GREEN GND Return for Green video signal. See pin 7 description.
24 BLUE GND Return for Blue video signal. See pin 8 description.
25 VSYNC Vertical Synchronisation signal.
26 DDC-SCL DDC clock signal. If not required, do not connect.
27 DDC-SDA DDC data signal. If not required, do not connect.
28 PWR- Monitor power return (ground).
29 -- reserved
30 -- reserved
31 -- reserved
32 V-Bus USB +5V. No power is taken from this signal, but the
voltage must be present for the monitor to detect that
it is connected to a USB port.
33 RS232 Tx RS232 Transmit Data output. This connects to the
PC’s Receive Data in signal (pin 2 on the PC’s DB9
connector).
34 RS232 Rx RS232 Received Data input. This connects to the
PC’s Transmit Data out signal (pin 3 on the PC’s DB9
connector).
35 USB D+ USB D+ signal. This signal must be run in a twisted
pair with USB D-.
36 USB D- USB D- signal. This signal must be run in a twisted
pair with USB D+.
37 Serial GND Ground pin for USB (USB GND) and serial data (pin 5
on the DB9 connector).
Figure 5. Power/Signal connector pin assignments.
Note
Either the RS232 or USB signals should be connected to the PC, NOT both.