70v load monitoring
Posted 25 March 2004 - 01:26 AM
Is there a way to make this work? Are there different cards that would work better? Fire Marshal comes Friday.
In a different facility we used USP-2 Ultra Series with the Crown System Interface and it works great. I understand these components are no longer available. We use IQwin with that system.
Posted 25 March 2004 - 06:09 PM
what about end of line resistor? to help keep it line not sure how that math would work.
Or if you like me want to keep Crown stuff use relays to switch feed to and from Crown's amps
so when not in use is connected to fire alarm with 10K resistor on it then when in alarm feed switches to crown outputs to drive speaker or you can switch relays to play music
Posted 25 March 2004 - 06:46 PM
You will likely need to experiment with the frequency and level somewhat, as you don't want to saturate the loudspeaker's internal transformers and generate unnecessary heating of the transformer. Also, you need to be careful that a constant low frequency signal which is getting near to DC is at a sufficiently low level not to heat the voice coil too much. Conversely, you may find the heating effect prevents driver problems in very cold temperatures during the winter months, even if it results in earlier driver failure than if it had no stimulus.
Just some food for thought...
Posted 26 March 2004 - 06:34 AM
Posted 29 March 2004 - 09:36 AM
Another option is to put filters between the transformer and the components to remove the disturbing frequencies.
Business Development Manager - Crown International