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Do we need run redundancy wires just in case this low voltage controllers and touch panels fail. Is there any device exist that bypass high-voltage controllers, so that when some thing in automation line fails, they operate normally with toggle switches?
 

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What is the "something" failing you are referring to? Lighting? A/V equipment? Security?


If you are referring to lighting, most of the high-end centrally controlled lighting control systems have backup switches that can be used in the event of a system failure. Keypad based lighting control systems which use local switches don't have any such features nor do they need them since the light switches should continue to operate even if a central controller goes down.
 

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The answer is that this is good practice but how you do it depends on what you system or device you need to make redundant. Most lighting systems have manual override switches that can be activated by dry contacts. Shades can be controlled by double pole double throw switches ( this can lead to service calls so be careful where they are mounted and who knows where they are. ). HVAC can be over ridden with a switched relay for each wire on the system. Of course they do not operate normally. Lights will turn on or off but not be able to dim.


If you are more specific then the solution can be more precise.


Alan
 
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