Search found 777 matches

by Retired STR-SG
Tue Dec 04, 2018 5:02 pm
Forum: Fire Alarm General Discussion
Topic: History of fire alarms, by generation
Replies: 7
Views: 157

Re: History of fire alarms, by generation

In 6th generation the 4100 became the 4100+. Also the 4020 was introduced.
by Retired STR-SG
Wed Nov 28, 2018 3:21 pm
Forum: Fire Alarm General Discussion
Topic: Daily Fire Alarm Question!
Replies: 48
Views: 912

Re: Daily Fire Alarm Question!

If you look closely at the scope photo I posted the peaks of the half sine wave are flattened. That probably is due to the MOVs and other components in the power supply and across the NAC. It is possible that the flattened sine wave changes the sound of a mechanical horn. The clipped peaks make the ...
by Retired STR-SG
Tue Nov 27, 2018 11:06 pm
Forum: Fire Alarm Help
Topic: Vibratone Voltage Conversion
Replies: 3
Views: 57

Re: Vibratone Voltage Conversion

The AC version cannot be converted to DC. The AC horns use the fact that the AC reverses polarity 60 times per second to create the diaphragm vibration. The DC horns have a set of contacts to make and break the connection to the coil to mimic the effects of AC. The more modern versions of horns use ...
by Retired STR-SG
Tue Nov 27, 2018 10:13 pm
Forum: Fire Alarm Help
Topic: Vibratone Voltage Conversion
Replies: 3
Views: 57

Re: Vibratone Voltage Conversion

There is not a transformer on the horn. That is the coil that produces the magnetic field that causes the diaphragm to vibrate to make the sound. According to the combined datasheet I found the 350 is the AC horns and the 450 is the DC horns. http://www.federalsignaldistribution.com/docs/audible/pdf...
by Retired STR-SG
Tue Nov 27, 2018 4:53 pm
Forum: Fire Alarm General Discussion
Topic: Daily Fire Alarm Question!
Replies: 48
Views: 912

Re: Daily Fire Alarm Question!

ConorTheFAguy6 wrote:
Mon Nov 26, 2018 10:54 am

Q: what was Simplex’s only FWR panel?
RSSAlarms wrote:
Mon Nov 26, 2018 12:24 pm
A: simplex 4208
I can add one to the answer. The NAC on the 4001 also is FWR. Scope photo below of 4001 NAC with 1/2 amp load.
Image
by Retired STR-SG
Tue Nov 20, 2018 10:26 am
Forum: Fire Alarm Help
Topic: Simplex 4006 Issues
Replies: 2
Views: 169

Re: Simplex 4006 Issues

I only worked on one 4006 and that was to set up monitoring. I don't have any information beyond what is in the published manuals. LED 1 and 2 are in the NAC monitor circuits to indicate trouble. There is a very slim chance that the RAM battery is half dead and has the memory in a state that is bloc...
by Retired STR-SG
Wed Nov 14, 2018 6:00 pm
Forum: Fire Alarm Help
Topic: Simplexgrinnell 4010ES IDNET Ground Fault
Replies: 3
Views: 89

Re: Simplexgrinnell 4010ES IDNET Ground Fault

Theboginator is correct that we recommend using licensed and certified technicians when troubleshooting active fire alarm systems protecting life and property. However, I will make a few observations on your problem. I am curious of your reading of 25 ohms in some condition. To the system 25 ohms fr...
by Retired STR-SG
Sat Nov 10, 2018 12:12 am
Forum: General Discussion
Topic: Odd PA Speaker
Replies: 1
Views: 78

Re: Odd PA Speaker

Taking a bit of guess on this. I am quite sure that is a Simplex clock. That might be a clock/speaker baffle unit sold with a Simplex 5100 intercom system. We purchased those clock/speaker units from Atlas Sound. They make similar units today.
by Retired STR-SG
Wed Nov 07, 2018 10:51 pm
Forum: Fire Alarm Help
Topic: Analog handoff phone line to Siemens
Replies: 1
Views: 113

Re: Analog handoff phone line to Siemens

By going to fiber optic lines your phone service is now VoIP. Depending on the analog to digital converters, the fiber length, and other factors the tones used by the DACT to DACR equipment can become distorted. That means the two pieces of equipment can no longer communicate reliably. The introduct...
by Retired STR-SG
Sun Nov 04, 2018 4:45 pm
Forum: Fire Alarm Help
Topic: SLC data Interference on speaker system.
Replies: 11
Views: 255

Re: SLC data Interference on speaker system.

If the devices have a shield terminal use that. If not connect the shield from the incoming cable to the shield in the out going cable. Use good wiring practice to be sure the shield does not touch any other wires or ground. The shield does not connect at the EOL. The shield dead ends at the last de...
by Retired STR-SG
Sun Nov 04, 2018 3:08 pm
Forum: Fire Alarm Help
Topic: SLC data Interference on speaker system.
Replies: 11
Views: 255

Re: SLC data Interference on speaker system.

It was worth a try. Sometimes these little tricks work and sometimes they don't. Remember, you are not dealing with a HiFi audio system. There may always be some slight noise if you get your ear right next to a speaker.
by Retired STR-SG
Sat Nov 03, 2018 10:20 pm
Forum: Fire Alarm Help
Topic: SLC data Interference on speaker system.
Replies: 11
Views: 255

Re: SLC data Interference on speaker system.

I would try the connection between the AUX power terminal on each panel as shown below. Be sure to set JP4 to nonresetable as shown. I don't think the connection can cause any damage. This connection is required on some Simplex systems like connecting an original 4003 voice panel to a 4020 or other ...
by Retired STR-SG
Sat Nov 03, 2018 8:33 pm
Forum: Fire Alarm Help
Topic: SLC data Interference on speaker system.
Replies: 11
Views: 255

Re: SLC data Interference on speaker system.

The power supply negative on the Notifier NFW-100 and the power supply negative on the FireLite ACC-25/50. That way there is no potential difference between the SLC negative and the speaker circuit negative. Then they have the same reference and might reduce the noise enough. It is worth a try befor...
by Retired STR-SG
Sat Nov 03, 2018 5:47 pm
Forum: Fire Alarm Help
Topic: SLC data Interference on speaker system.
Replies: 11
Views: 255

Re: SLC data Interference on speaker system.

Jumping the power supply negative to the SLC shield terminal will not do anything to help. That SLC shield terminal might already be at zero volts. It could be at chassis ground which would give a ground fault trouble if connected to power supply negative. Your problem is coming from having unshield...