** Output 2 Voltages

Mp333

Active Member
I have noticed with a 2.2k resistor Output 2 is at 4v and with no load it shows14v with the Global set to Siren instead of voltage. My understanding is that there should be no voltage when Siren is selected in Global.
Any ideas???
 
Thanks
 
So it true that you cannot connect speaker to output 2 since it has constant DC voltage even in Siren mode? It will fry the speaker.
 
My speaker fried. My Elk73 speaker shorted despite having siren selected. When the speaker died it also messed up my output 2 resulting in a constant trouble condition and I had to have my board replaced.

Right now I have nothing hooked up to output 2 as I am afraid the same thing will happen again.
 
Superjer2000 said:
My speaker fried. My Elk73 speaker shorted despite having siren selected.
 
If you have a speaker connected to Output 2, you need to select voltage.  Selecting siren will likely fry a small speaker.
 
jpmargis said:
 
If you have a speaker connected to Output 2, you need to select voltage.  Selecting siren will likely fry a small speaker.
No. Siren is what needs to be selected to drive a speaker as a siren. Voltage simply provides "voltage" to a siren with its own siren driver. See page 36 of the install manual.

My speaker.worked well for a few months connected to OUT2 and configured as "siren".
 
Let's try this.  From a keypad, G26 is set to "No" for speakers; G26 is set to "Yes" for a self-contained siren or bell.  If you select "Yes" and have a speaker connected, there will be a problem.
 
In RP2, check "Siren output" for speakers or check "Voltage out" for a self-contained siren or bell.
 
jpmargis said:
A little bit of DC votage will no "fry the speaker".
Any DC voltage is not good for a speaker. It will heat the speaker coils and eventually open the coils at which point it will not function.
 
So what do you think happens when you play music?
 
Answer:  The speaker coil heats and everything is fine as long you remain below the rated power for the speaker.  It doesn't matter whether it's AC or DC.  The supervision voltage will not damage an ELK-73 which is rated at 20 Watts,
 
jpmargis said:
Let's try this.  From a keypad, G26 is set to "No" for speakers; G26 is set to "Yes" for a self-contained siren or bell.  If you select "Yes" and have a speaker connected, there will be a problem.
 
In RP2, check "Siren output" for speakers or check "Voltage out" for a self-contained siren or bell.
this is correct. You my want to edit your message above to reflect this in case somebody searches and follows the advice in your message five messages above.
 
Mp333 said:
Any DC voltage is not good for a speaker. It will heat the speaker coils and eventually open the coils at which point it will not function.
You are incorrect.
 
If this were the case, I would have approximately 4-5000 speakers that were "fried" on the NAC circuits of the fire alarm at the site I am presently posting from. There is a constant supervision voltage present on the circuits, depending on if they're wired style 4 or style 6 (EOLR vs continous loop back to the NAC).
 
The OP cooked their output somehow, either via improper loading or through no fault of their own.
 
You can attach a speaker to OUT2, I've done it many times on many installs.
 
I would not, however, install a speaker like a 73 on OUT2, I'd recommend at least a unit capable of 30 watts. If shorting is a possibility or concern, fuse the output, it's actually a recommended way to install any outdoor speaker/strobe/siren.
 
So here's some thing that has me puzzled??? I have set the Output 2 to Siren and its firing the ATW FS-66 which requires 6-14v volts to operate.I thought you would need to set output 2  to voltage....
 
Are you sure you don't have an ATW FK-56?  If it's really an ATW FS-66, the ELK M1G should be set to output voltage.
 
It is FS66. It has the circuit board to drive the speaker. I did hook it up before i took it apart to output 1 just to see if would work. I wonder if it would get louder if I set it to voltage? Probably.
 
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