BSS Audio Prosys PS-8810 Owner's Manual - Manual (Page 106)

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PS-8810
DIGITAL SIGNAL PROCESSOR
Control Port Digital Inputs (DIN 1-8)
are to participate in the room combining, individual closure
patterns can be programmed to trigger particular Presets. Each
combination can be programmed to its own Preset. The example
screen shot shows three digital inputs participating in an 8 option
room combining scheme. All three inputs off selects Preset 1,
while input 1 on while inputs 2&3 are off select 2, and so forth.
This allows a highly flexible programming scheme for any room
combining design.
Uses:
The Control Port digital inputs can be used to sense logic 'high' or
'low' signals to control many of the features of the BSS PS-8810.
The inputs are current driven and will accept +5V or +10V inputs,
and are well suited for sensing contact closure.
One particularly useful way to use the Logic Input Control Mode is
to sense the opening and closing of switches in a room-combining
system. Switches are mounted in retractable partitions between
rooms. When a partition is opened, the signal at the digital input
will be interpreted as a logic 'low', and when the partition is closed,
the signal at the digital input will be interpreted as a logic 'high'.
When specific mapped combinations of logic lows and highs are
sensed, the BSS PS-8810 will activate a Preset to tailor the audio
system to the currently configured space.
Another possible use for the Logic Input Control Mode is to sense
switch closures along the path of a ride in a theme park, to signal
the ride’s location, and change to different Presets accordingly.
Sample Control Port Analogue Input Circuit