Ask@ENGINEERING.com is a great place to get an answer to your practical engineering question or to share a fun puzzle. Over 100000 engineers know the answer. To access our old forum database of over 10000 questions and answers please visit the old Ask@ forum.

Relay input & output
Last Post 29 May 2012 09:33 AM by jwd217. 1 Replies.
AddThis - Bookmarking and Sharing Button Printer Friendly
  •  
  •  
  •  
  •  
  •  
Sort:
PrevPrev NextNext
You are not authorized to post a reply.
Author Messages
SHAFEEL
New Member
New Member
Posts:2

--
28 May 2012 03:07 AM
    Dear Guys,

    I am planning to connect a fire alarm system with cable 1.5mm cable to the security system which require cable 0.8mm with the help of relay.

    Is it really possible to do this with the help of relays. We only require one input from the fire alarm system so as to activate the security system.

    Kindly help in this matter.
    jwd217
    New Member
    New Member
    Posts:31

    --
    29 May 2012 09:33 AM
    The size of the cable is not important here. The main reason to use relays would be if each system used a different voltage. For eample, if the fire alarm signal was 24 volts dc and the security system expected 12 volts ac, or perhaps just a switch closer, then a relay could be used. For this example you would pick a relay with a 24 volt dc coil and then connect the relays contact to the security system input. If the input expected 12 v ac input and had a 12 v ac "hot" connection, then connect the "hot" wire to the relay common contact and a wire from the relay normally open (no) contact to the security input. Just match the relay coil voltage to the fire alarm signal output.
    You are not authorized to post a reply.




    Masters Discovery Tool

    iPhone/iPad App

    Android App