All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > General Electronics Chat

Notices

General Electronics Chat Discussion forum for general chat about anything electronics related, including asking questions about material in the All About Circuits E-book, Worksheets, and Videos.

Reply   Post New Thread
 
Thread Tools Display Modes
  #1  
Old 04-22-2007, 06:26 PM
jsp2242 jsp2242 is offline
New Member
 
Join Date: Apr 2007
Posts: 1
Default Relays, How to connect

I have a need to install a power relay in a circut with a ext. fuse box at the end. I have several Bosch relays of the correct amp rating but i'm confused with what to do with the switch lead on the 4 post relay, same with the 5 post. what swithch (Type) would I connect it to?-JSP2242
Reply With Quote
  #2  
Old 04-22-2007, 09:52 PM
mrmeval mrmeval is offline
Senior Member
 
Join Date: Jun 2006
Posts: 833
Default

Explain more about what you're trying to do.
Reply With Quote
  #3  
Old 04-22-2007, 10:19 PM
Tube Tech Tube Tech is offline
Junior Member
 
Join Date: Jan 2007
Posts: 46
Default

Pin numbers are not standardized among relay manufacturers. 5 pin tells us nothing.

Bosch relays don't have a 4 or 5 pin. Google Bosch relays under images tb, you find the images below

http://www.classictruckshop.com/club...osch/relay.jpg

Typical relay:

http://www.bcae1.com/images/jpegs/relaycov.jpg

5 and 6 in the images of the typical relay perform the same function as 30 on the Bosch relay. It's the common contact.

The typical relay is a DPDT switch. Pin 5 normally connects to pin 1, NC, normally closed. When the coil is energized, that contact opens and common connects to pin 3, the NO, normally open contact.

So: on this typical relay, A and B are the coil. 5 and 6 are the common contacts for the 2 switches. 1 and 2 are normally closed, they are connected to common when the relay is relaxed. 3 and 4 are normally open, connected the common contact when the relay is energized.

You could just read the tutorial:

http://www.bcae1.com/relays.htm
Reply With Quote
Reply   Post New Thread

Tags
,


Related Site Pages
Section Title
Worksheet Time-delay electromechanical relays
Worksheet Protective relay circuits
Worksheet Electromechanical relay logic
Worksheet Thyristor application circuits
Worksheet AC motor control circuits
Worksheet DC generator theory
Worksheet Basic electromagnetic relays
Worksheet Arc flash and arc blast
Worksheet Electrical connections
Textbook Relay construction : Electromechanical Relays


Similar Threads
Thread Thread Starter Forum Replies Last Post
relays help jav_ Homework Help 3 03-09-2007 04:52 AM
4 pin car relays Cossiedave General Electronics Chat 5 03-02-2007 05:52 PM
Replacing normal relays with self lock relays Hali General Electronics Chat 4 02-28-2007 08:10 AM
how to connect IR led to 555... TNT General Electronics Chat 7 05-29-2005 02:45 PM
Protective Relays maurice_vandoorne General Electronics Chat 4 05-09-2005 05:48 AM

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 09:38 PM.


User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.