System Integration - Christie roadie 25k User Manual

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Configuring the GPIO
The GPIO connector located on the side input panel provides a flexible method of
interfacing a wide range of external I/O devices to the projector, usually so that an
event on one device automatically triggers an event on the other. There are 7 GIO
pins available on the 9pin D-Sub GPIO connector, which are configurable via RS232
commands. The other two pins are reserved for ground and power – see table below
for pin identification.
GPIO
2 3 4 5
6 7 8 9
The serial cable required for connecting the external device to the projector's GPIO
connector, whether it's a standard serial cable or a custom one, must be compatible
with the external device.
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The GPIO connector can be configured to automate any number of events using the
serial command code GIO. Each pin is defined as either an input or output
depending on the desired outcome. In general, configure the pin as an input if you
want the projector to respond to something an external device does, and as an output
if you want the external device to respond to an action taken by the projector. For
example, configure the pin as an output if you want the lighting in a room to
automatically dim when the projector is turned on.
A GIO command can also set the state of each pin as high or low. By default, the
state of each pin is high. The voltage applied to pins in the high state is + 3.3V.
Example 1. Turn room lighting on when the projector is turned off. (Assumes a
control/automation unit is configured to turn the lights on when pin 2 of its input goes
high.)
(GIO C2 O)
(GIO 2 H)

System Integration

Pin #
1
2
3
4
5
6
7
8
9
Set pin #2 configuration to output
Set pin #2 to high (state)
A p p e n d i x E
GPIO Pins
Signal
+ 12V (200mA)
GPIO 1
GPIO 2
GPIO 3
Ground
GPIO 4
GPIO 5
GPIO 6
GPIO 7
Roadie 25K User's Manual
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