Logic Arrays - Polycom SoundStructure C16 Design Manual

If using an external voltage supply as part of any logic output circuit, the maximum voltage that should be
used with the logic outputs is 60V with a maximum current of 500 mA.
Open Collector Logic Output Design
As shown in the following figure, when the logic output pin is set to 1 the output pin allows current to flow
from the logic output pin to the chassis ground, thus completing a signal circuit path. When the logic output
is set to 0, no current flows from the logic output pin to ground and the circuit is open.
Flow from Logic Output Pin to Chassis Ground

Logic Arrays

It is possible to link multiple logic pins together in a logic array. A logic input array is useful when there are
more than two logic states that are important. For example, in a split and combine room with two movable
partitions, there are four different combinations that must be considered as shown in the following figure with
a logic input array that consists of two input pins. These two pins allow all four combinations of the room
partitions to be specified. In the Understanding Events section, we'll see how to use the logic array values
as sources and execute different presets based on the value of the logic array.
When defining logic array pins, the pin with the highest array index is the most significant bit. As shown in
the figure, creating a two pin logic input array creates TwoPinArray[2] and TwoPinArray[1] pins as part of
the array TwoPinArray. TwoPinArray[2] is the most significant bit in the two bit word.
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