How to Indentify terminals of a relay

Discussion in 'General Electronics Chat' started by lpfan, Feb 8, 2007.

  1. lpfan

    Thread Starter New Member

    Feb 8, 2007
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    0
    Plz guys help me i dont know how to indentify the terminals of a relay
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    282
    Hi,

    It's hard to give a good reply without any idea of the relay in question. If you have a number on it, then the manufacturer should have the information.

    Do you have any idea of the type and voltage on the coil?
     
  3. lpfan

    Thread Starter New Member

    Feb 8, 2007
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    0
    Yes I do hv the info on it. It is a 6v d.c. 400 ohms , 150mA, single pole double throw switch. what i want to know is tht how to identify which terminal is the coil terminal and which are the normally closed and normally open ones? Thx fr replying to my thread:)
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Two pairs of terminals will have some continuity between them. One pair will read 400 ohms - that's the coil. The other two will read 0 ohms - that's the common and NC (normally closed) contact. Put 6 volts on the coil, and the common terminal and the one that checked open before will show 0 ohms (the NO, or normally open terminal).
     
  5. lpfan

    Thread Starter New Member

    Feb 8, 2007
    3
    0
    Thx a lot man!:)
     
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