Projector Christie Roadster S+20k User Manual

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							Appendix E 
System Integration 
 
 Roadster/Mirage S+ User’s Manual E-1 
The GPIO (General Purpose Input/Output) connector located on the input panel 
provides a flexible method of interfacing a wide range of external I/O devices to the 
projector. 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 Pins 
Pin #  Signal 
1  + 12V (200mA) 
2 GPIO 1 
3 GPIO 2 
4 GPIO 3 
5 Ground 
6 GPIO 4 
7 GPIO 5 
8 GPIO 6 
9 GPIO 7 
 
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.  
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 the 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.   Confi
guring the GPIO '
GPIO
12
63
74
85
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By using the GIO command, you 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)   Set pin #2 configuration to output  
(GIO 2 H)  Set pin #2 to high (state) 
(GIO?)  Request the state and configuration of all pins 
(GIO! “HHLLHLH” “OOIOOOI”) Reply of pin state and configuration 
(GIO? C2)  Request configuration for pin #2 
(GIO! C2 O)  Reply with pin #2 configuration as output 
(GIO? 2)  Request the state of pin #2 
(GIO! H)  Reply with pin #2 state as high 
 
Use the serial command RTE to specify an action that is initiated at a particular time 
or based on an external stimulus. 
For General Purpose IO “G” 
Parameter Name   Value 
P1  RTE type  G (Real Time I/O Event) 
P2 I/O bit 1-7 
P3 Pin state 
(1 Character) 
(String) H = High 
L = Low 
“LHXXXHL” Combine multiple inputs and 
trigger occurs when all conditions are met 
P4  Commands  Any valid serial protocol command for the 
device 
 
Example 2.
 Projector powers up when a switch on the external device is turned on. 
(GIO C2 I)  Set pin #2 configuration as input 
(RTE G 2 H “(PWR 1)”)  Power on when pin #2 set to high  
(RTE G 2 L “(PWR 0)”)  Power off when pin #2 set to low 
 
 
 
 
 Query Command '
  Real Time Event '