Please login or register.

Login with username, password and session length

Author Topic: CM15A Operating Temps  (Read 3312 times)

SafeShowroom

  • Jr. Member
  • **
  • Helpful Post Rating: 0
  • Posts: 10
    • Safe Showroom
CM15A Operating Temps
« on: March 06, 2008, 02:46:43 PM »

I'm considering running a USB cable up through the ceiling, and then plugging the CM15A into an outlet in the attic.

Does anyone know the recommended operating temperatures for this device?

Thanks!
« Last Edit: March 06, 2008, 02:48:23 PM by SafeShowroom »
Logged

Puck

  • Advanced Member
  • Hero Member
  • ******
  • Helpful Post Rating: 171
  • Posts: 1799
Re: CM15A Operating Temps
« Reply #1 on: March 06, 2008, 04:19:48 PM »

Most commercial electronic components are rated for 0C (+32F) to +70C (+158F) operating temperature. I don't recall any special heat sensitive components in the CM15A. I would be more concerned about the plastic melting during the summer months.

But do keep in mind that the failure rate of the CM15A will increase with an increase in operating temperature.
« Last Edit: March 06, 2008, 08:53:22 PM by Puck »
Logged

dave w

  • Community Organizer
  • Hero Member
  • ***
  • Helpful Post Rating: 139
  • Posts: 6116
Re: CM15A Operating Temps
« Reply #2 on: March 10, 2008, 01:09:02 PM »

FWIW

I have a couple of Appliance Modules in our attic with no effects from summer heat or winter cold. 
That said, the CM15A uses a crystal oscillator for the uP and xtal oscillator frequency stability tends to be sensitive to thermal changes. You can only experiment, I doubt it will just up and quit, but if you run in to sudden eratic operation of the CM15A I would suspect a thermal problem.   
Logged
"This aftershave makes me look fat"

jtykal

  • Sr. Member
  • ****
  • Helpful Post Rating: 12
  • Posts: 86
  • It was working fine yesterday...
    • Casa Bella - Vacation Condo in Fort Myers, FL
Re: CM15A Operating Temps
« Reply #3 on: March 10, 2008, 01:31:24 PM »

My CM15A has been extremely reliable when the ambient temperature is between 67.0F and 67.1F degrees.
Outside of that range, I just don't know what it's gonna do...  ;D ;D ;D
Logged
AHP-CM15A(ext.ant)-SmartMacros-OnAlert-DoorMonitor(custom)-Win7

dave w

  • Community Organizer
  • Hero Member
  • ***
  • Helpful Post Rating: 139
  • Posts: 6116
Re: CM15A Operating Temps
« Reply #4 on: March 10, 2008, 05:04:33 PM »

priceless.
Logged
"This aftershave makes me look fat"

Puck

  • Advanced Member
  • Hero Member
  • ******
  • Helpful Post Rating: 171
  • Posts: 1799
Re: CM15A Operating Temps
« Reply #5 on: March 16, 2008, 03:23:00 AM »

...the CM15A uses a crystal oscillator for the uP and xtal oscillator frequency stability tends to be sensitive to thermal changes.

The CM15A uses the Cypress micro-controller's internal oscillator instead of an external crystal oscillator. The micro-controller is spec'd at 0 to +70C operating temperature, so there should be no stability issues in that range.
Logged

steven r

  • Advanced Member
  • Hero Member
  • ******
  • Helpful Post Rating: 74
  • Posts: 2189
  • Halloween with X10
Re: CM15A Operating Temps
« Reply #6 on: March 16, 2008, 11:45:41 AM »

My CM15A has been extremely reliable when the ambient temperature is between 67.0F and 67.1F degrees.
Outside of that range, I just don't know what it's gonna do...  ;D ;D ;D
You must of gotten one off the models that passed QC. My best operating temperature range is 68.00 to 68.01.   ;)
Logged
BVC let's me tell my camera where to go!
:) Murphy is my beta testing pal. He helps me find problems whether I like it or not. :)
 

X10.com | About X10 | X10 Security Systems | Cameras| Package Deals
© Copyright 2014-2016 X10.com All rights reserved.