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I currently have a M1KP LCD Keypad located near an entry door which has a glass inset. For system status obfuscation purposes, I have set up this keypad by opting: "LEDs off 60 S after no activity". In this 'all-dark' mode, peering eyes from the outside won't see any status LEDs (such as the...

  ^^ Hope they're not the ones going into the Dreamliner.   :huh:

By the way the stamped number on the back side next to the label, which I guess is the board's serial number, of the fried board is 110301 (or it could be 110307 - it's a bit smeared)

So do we have a more descriptive understanding of what this chip does? Furthermore, how do we "protect" these boards and other components in our systems?

I pulled the new board out again to look for the marking on that chip: LM393 PFRF

When I swapped the new board in, I obviously kept the same bus address and termination jumper setting as the old bad board, since I wasn't changing any rules nor wiring. All I did to do the swap was to remove the terminal blocks, so all my wire terminations stayed the same. I thought that was...

I have an output from the ribbon whip from that board that drives a System Sensor RRS-MOD polarity reversal module that synchronizes the sounders of the smoke detectors. I didn't want to go without this life-safety component so I was a bit unnerved when I found the board was fried. Fortunately I...

I looked back at historical weather data on weatherspark.com and apparently right about when the log registered the board failure, there was a thunderstorm that hit the area. By the time I got home, other than the wet grounds, you wouldn't even have known a storm of such severity came by...

I came home from work today and noticed an "output expander lost comm" message displaying on my keypad. At first I thought it was a momentary hiccup in the databus, and so I ignored the message. However, when I checked a little later in the evening, the message remained. So I went and did some...

Haha... it's all about staying cool! The heck with water spillage... (a waterbug sensor on the floor will pick that up, right?). Actually with my two air handlers dumping into this pump, and the way the fans continue to run on lower speed when cooling demand is off during dehumidification mode...

Thanks guys for clarifying the zone hookup part. If the Elk power supply is dead, or somehow dies, the DPDT relay won't be energized regardless of the overflow switch position. So the shutdown circuit (R-G) will throw open in the relay, telling the air handler to shut down (or not allowed to...

I have a condensate pump with an overflow switch. The switch has 3 leads: N.O., COM, and N.C. When the pump is normal (not overflowing), N.C. - COM is closed. When the pump is overflowing (i.e. motor died, downstream clog…) N.O. - COM is closed. Typically this switch is wired directly to...

Perhaps something like this to avoid nuisance glitches or momentary outages: WHENEVER [GFCI Zone] BECOMES NOT SECURE THEN TURN Output 99 ON WHENEVER EVERY 1 MINUTE AND Output 99 STATE IS ON THEN DISPLAY "GFCI LOST POWER" {THEN ANNOUNCE …} WHENEVER [GFCI Zone] BECOMES SECURE...

GFCI - Ground Fault Circuit Interrupters Here are some samples: http://www.leviton.c...&minisite=10251

Thanks guys! I'll give the Relay In Box a try.

Does anyone have any good ideas monitoring for a tripped condition in a GFCI receptacle? I would like to be alerted when, for example, the HVAC condensate pump or basement freezer receptacles ever get tripped. I've found some GFCI receptacles that have internal audible alarms now, but I'd like...

Maybe what's happening is that because you're unable to reset the offending smoke detector during the very brief moment when the RRS-MOD cycle is passing normal polarity power through the circuit, the Elk thinks it sees a NEW fire alarm (from the same detector) because the detector remains...

I find it strange that the databus is getting so saturated with messages during the fire alarm that you can't even enter any commands on the keypad. Upon fire alarm, does pressing the star key " * " on any keypad do anything, namely silence the alarm? It's interesting that in the Elk...

Do you have the rule: WHENEVER ANY FIRE ALARM CUTS OFF, THEN TURN OUTPUT [3] OFF ^This is happening because you are still in Fire Alarm condition. Meaning your rule to turn on Output 3 is being re-activated regardless of time limit condition.

According to Elk's M1 firmware release notes, version 5.2.4 dated 6/14/10 is the last UL version, "currently used in new controls." However Elk has released two subsequent firmware updates: 5.2.6 (2/14/11) and 5.2.8 (7/18/11), both of which have not been evaluated by UL as of the document...