Logic Outputs - Polycom SoundStructure C16 Hardware Installation Manual

Hardware Installation Guide for the Polycom SoundStructure
The following figure shows the analog gain input pin and the associated +5 V and ground pins that are used
with the analog gain input pin. The analog voltage on the analog gain input pin is converted to a digital value
via an 8-bit analog-to-digital converter for use within the SoundStructure devices. The maximum voltage
value, i.e., 0 dBFS on the analog gain input, is 4.096 V. 0 V is converted to 0 and 4.096 V and above is
converted to 255.
The chapter Logic Examples
Analog Gain Input Pin and +5V and Ground Pins
SoundStructure Logic Input
Analog
Voltage
Value

Logic Outputs

All logic outputs are configured as open-collector circuits and may be used with external voltage sources.
The maximum voltage that should be used with the logic outputs is 60 V with a maximum current of 500 mA.
Logic Outputs
SoundStructure Logic Output
Logic
Controller
Chassis
The open collector design is shown in the following figure and works as a switch as follows: when the logic
output pin is set high (on), the transistor will turn on and the signal connected to the logic output pin will be
grounded and current will flow from the logic output pin to chassis ground.
Polycom, Inc.
provides an example of how to use the analog gain input pin.
5V
Ground
Logic Pin 1 (+5V)
Analog Gain Input Pin
Logic Pin 25 (Ground)
Logic Output Pin
26