B. Pin configurations
B.1 About General Purpose Inputs & Outputs (GPIO)
The Barco Cinema Controller and the Barco ICMP are equipped with GPIO ports. The electrical specifications
described in this ch apter are the same for both GPIO ports.
General Purpose inputs
The B arco Cinema Controller and the Barco ICMP have each eight (8) opto-isolated general purpose inputs available. These inputs
are us ed to trigger the execution of macro files. For more explanation about the association of a m acro to a GPI, consult the user
guide of the Communicator.
Input v oltage
The inputs can be directly driven from a TTL or CM O S output.
• The shape of the pulse must be rectangu lar.
• The duration of the pulse must be at least 50 milliseconds (shorter pulses are considered as a switch bounce)
• Minimum voltage : V
min
=+5V
• Maximum voltage : V
max
= +18V
External power supply
When interfacing with contact closure outputs, an external power supply needs to be provided. Depending upon the configuration a
suitable pull-up resistor needs to be add ed as well.
10k
820R
GPIn P
GPIn N
4.7V
Input to projector Internal projector
1k1
+5V
to
+18V
10k
820R
GPIn P
GPIn N
4.7V
Input to projector Internal projector
1k1
+5V
to
+18V
Image B-1
Cables
When long cable connections are required the use of sh ielded cables with twisted pairs is recommended. One twisted pair is to be
assigned to eac h GP Input pair.
How to make the connection
When the power supply used to pro vide the D C voltage
is is olated from ground (for example in the case of an A C adapter) it is
recommended that the minus pole of that power supply is connected t o ground (or to the projector chassis). This will avoid high
common mode voltages at the projector G P Inputs. If that sam e power supply is used for other parts of the system, take care not to
create ground loops. In any c ase when shielded
cables are used that shield should be connected to the projector chassis.
General Purpose outputs
The Barco Cinema C ontroller and the Barco ICMP hav e each eight (8) opto-isolated outputs ava ilable. F our (4) of the outputs on
the Cinema Controller are dedicated for TI. The other general purpose outputs can b e controlled via software.
About an output
The output can generate a falling ed ge, rising edge, toggle or continuous toggle.
• Generate Falling Edge – generate a falling edge on the external G PO port if the present state of the output is h igh. If the
present state of the external GPO is low, no edge will be generated.
• Generate Rising Edge – gen erate a rising edge on the external GP O p ort if the present s tate of the output is low. If the p resent
state of the external G P O is high, no edge will be generated.
• Generate Toggle – ge nerate a toggle on the external GPO port. If the present state of the output is low, a rising edge will be
generated, followed by a falling edge. If the present state of the output is high, a falling edge will be generated, followed b y a
rising edge. P ulse width = 20 milliseconds.
• Generate Continuous Toggle - This command w ill generate a continuous toggle of the external GPO port. This toggle will
continue u ntil a G enerate Falling Edge, Generate Rising Edge,orGenerate Toggle com mand is received. The rate of toggle is
24Hz. .
152
R5906847 DP2K SLP SERIES 02/06/2017
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