Polycom SoundStructure C16 Design Manual page 66

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is, 0 dBFS on the analog gain input, is 4.096 V. 0V is converted to 0 and 4.096 V and above is converted to

Analog Gain Input Pin for SoundStructure Devices

SoundStructure Logic Input

Logic Outputs

All logic outputs are configured as open-collector circuits and can be used with external positive voltage

sources. The maximum voltage that should be used with the logic outputs is 60 V. Each pin can sink up to

60mA. When using the internal 5V power supply, the maximum current that is supplied across all logic

outputs on a SoundStructure device is 500 mA.

Logic Output Pin on SoundStructure Devices

SoundStructure Logic Output

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 turns on and the signal connected to the logic output pin is

grounded and current flows from the logic output pin to chassis ground.

Polycom, Inc.

Logic Pin 1 (+5V)

Analog Gain Input Pin

Logic Pin 25 (Ground)

Logic Output Pin

Troubleshooting