Intellivox DDC Installation Manual Appendix | EN 14 |
|
|
The AGND pin serves as a reference for the SPL and temperature measuring input circuitry. To keep this ground signal as clean as possible, the AGND wires together with the MIC and the NTC signal should be run through a shielded cable. The shield should be connected to the GND pin of this terminal block.
•AGND should not be connected to any other ground pin (GND or DGND) on the chassis.
•Because safety is a very important issue, the safety ground pin of the IEC mains connector should always be connected to a low impedance ground network.
If the standard solution is chosen to be connected the audio (line level) inputs the grounding situation is according to Fig 9.
Fig 8 Ground configuration of the Intellivox chassis.
Fig 9 Standard grounding configuration
Bosch Security Systems July 2003