12-04-2006, 02:19 AM
If you experience excessive hum or a buzzing noise on the telephone or keypad when accessing the voice menu, the possible reasons are
1 - The power supply to Comfort is overloaded
2 - The keypad cables with Mic and Voice are running too close to mains cables or the cable is not twisted pairs
Drawing too much current from the 12V to PIRs, relays and other modules has been found to be a major factor in this problem. In a large system, make use of the Slave SEM01 to supply some of the current, as each Main and Slave panel is able to supply 1 Amp
1 - The power supply to Comfort is overloaded
2 - The keypad cables with Mic and Voice are running too close to mains cables or the cable is not twisted pairs
Drawing too much current from the 12V to PIRs, relays and other modules has been found to be a major factor in this problem. In a large system, make use of the Slave SEM01 to supply some of the current, as each Main and Slave panel is able to supply 1 Amp