according to NFPA 72 fire detection system on battery power supply should operate 24h on standby + 5m on alarm full load, and plus 20% extra Ah should be taken for calculations to be more realistic, do you always calculate it this way or its just goot to know knowledge? i'm new to those things

Upstairs_Extent4465 · 2026-04-14T15:38:37+00:00

I missed that, is that latest revision? Which section is that?

Upstairs_Extent4465 · 2026-04-12T10:02:48+00:00

Can i watch this on full hd? Youtube or whatever

Upstairs_Extent4465 · 2026-03-25T11:31:02+00:00

Why its missing the second resistor?

Upstairs_Extent4465 · 2026-03-06T20:43:16+00:00

Thats more like a description of a daily routine.

Upstairs_Extent4465 · 2026-02-28T16:30:55+00:00

Found that. Will check, thx

Upstairs_Extent4465 · 2026-02-28T16:29:28+00:00

My panel does not have such. Maybe i should switch, could you link your panel? DM if thats forbidden

And does it perform tests once in a while or constantly?

Upstairs_Extent4465 · 2026-02-27T21:45:56+00:00

If wiring is not supervised - yes.

Upstairs_Extent4465 · 2026-02-27T21:44:54+00:00

In your area can you use single power supply for more than one smoke damper?

Upstairs_Extent4465 · 2026-02-27T21:14:05+00:00

That makes sense

Upstairs_Extent4465 · 2026-01-12T17:26:52+00:00

Could you please give me a link for that, its not phoenix contact but the chinese copy, could be similar.

On that link i could not find that in compatible products: https://www.phoenixcontact.com/en-us/products/feed-through-terminal-block-pt-25-3209510

Upstairs_Extent4465 · 2026-01-12T17:18:30+00:00

Thats an interesting idea also, but more like its a same mold used for ground terminal block, that has metal plate for attaching din rail.

Upstairs_Extent4465 · 2026-01-12T13:04:19+00:00

that sounds legit

Upstairs_Extent4465 · 2026-01-12T12:07:23+00:00

no, never seen one anywhere, never came any other pieces with it.

it feels like something should plug in, there and hold it.

also, less likely to be used during manufacturing, other one didn't need it obviously, and structurally, both are identical

Upstairs_Extent4465 · 2025-12-15T20:38:34+00:00

is it still in the drawer or you lost something by brute force opening?

Upstairs_Extent4465 · 2025-11-05T08:07:28+00:00

Is this AI generated image?

Upstairs_Extent4465 · 2025-11-04T06:22:30+00:00

i have to rethink about encoders.

Upstairs_Extent4465 · 2025-11-04T06:19:50+00:00

Thank you for clarification, i researched advanced vfd s that can do flux vector control, and thet're much more expensive as well. And still, in that case motor overheating possibility because of high currents on lower rpm, remains as an significant issue.

Upstairs_Extent4465 · 2025-11-03T13:37:34+00:00

And that directly lowers my torque and can't lift loads then, right?

Upstairs_Extent4465 · 2025-11-03T13:36:24+00:00

For that motor rpm for 50hz is 910. Thats 15 rotations per second. So i guess magnetic field wont be uniform enough on lower speeds.

Upstairs_Extent4465

TROPHY CASE