On delay switch

[palayman]

Hi,

I need a switch that when initially powered on delays its output for 30 minutes.

I have a situation where my Ubiquiti UDM SE switch doesn't like to be powered off for a short time. It never successfully reboots unless it is turned off for at least 20 minutes, but 30 is safe.  I have it plugged into a UPS, but if the power comes back on shortly after UPS runs out of power, then the switch hangs with "taking a little longer" notice forever. The thought is to plug it into the switch described.  I could build something, but off the shelf would be better. Ideas?

I am planning to exchange the switch, but some logistical problems necessitate an alternate short-term solution.

Paul

 

Edited January 15 by palayman

[CoolToys]

@palayman, Have you thought about using a State to trigger a program?  I use this to prevent my A/C from short cycling when I go in or out a door but to shut it off when the doors are open too long.  I use the reverse methodology to insure the doors/windows are closed for at least 10 minutes before letting the HVAC turn back on.  Do something like this and change to 30 minutes?

 

Doors_Windows Open - [ID 000A][Parent 0001]

If
        $sOpenWindow is 0
    And 'ELK Alarm' Arm Up State is Not Ready To Arm
 
Then
        Wait  10 minutes 
        Run Program 'd_Doors_Windows Still Open' (If)
 
Else
   - No Actions - (To add one, press 'Action')
 
// Used to shut off HVAC if Doors and Windows opened for extended periods of time, but delays shutdown long enough to prevent short cycling of system.
 

 

d_Doors_Windows Still Open - [ID 0002][Parent 0001][Not Enabled]

If
   - No Conditions - (To add one, press 'Schedule' or 'Condition')
 
Then
        $sOpenWindow  = 1
 
Else
        Run Program 'Doors_Windows Closed' (If)
 
// Used to prevent short term Door or Window openings from short cycling HVAC system - Program should be disabled as it is triggered by Doors_Windows Open
 

Doors_Windows Closed - [ID 0038][Parent 0001]

If
        $sOpenWindow is 1
    And (
             'ELK Alarm' Arm Up State is Ready To Arm
          Or 'ELK Alarm' Arm Up State is Armed Fully
        )
 
Then
        Wait  10 minutes 
        Run Program 'd_Doors_Windows Still Closed' (If)
 
Else
   - No Actions - (To add one, press 'Action')
 

d_Doors_Windows Still Closed - [ID 0035][Parent 0001][Not Enabled]

If
        'ELK Alarm' Armed Status is not Disarmed
     Or 'ELK Alarm' Arm Up State is Ready To Arm
 
Then
        $sOpenWindow  = 0
 
Else
   - No Actions - (To add one, press 'Action')
 
// Used to prevent short term Door or Window openings from short cycling HVAC system - Program should be disabled as it is triggered by Doors_Windows_Closed

[palayman]

I thought about something like this, but ISY is not on the same UPS (remote location) and will have no idea if the router is off or for how long.  It is also possible the router would have power when the ISY does not. I need something independent.