Previous in Forum: EOT Cranes   Next in Forum: Magnetic Proximity Sensor Equivalent to Hamlin 59070-010
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
10 comments
Rate Comments: Nested
Eengineer21
Member

Join Date: Jun 2008
Posts: 9

Emergency Stop Switch and Reset Switch

06/06/2008 9:04 AM

Hello, My supervisor wants an emergency stop system installed onto the sheet metal roll in the Auto shop. The system is activated via a push button switch that is hit by the knee whever the person is standing in front of the machine. I've got the pushbutton switch figured out, the problem is that my supervisor wants the emergency switch to trigger another switch nearby(normally open) that will close and then serve as a bypass to prevent the machine from being turned on again, he also wants that switch to require a manual reset after this has occured so that an accident does not occur. The problem is that the supervisor does not want the emergency stop switch to serve as the reset switch, he wants the reset switch to be located out of reach of the individual employee, thus eliminating the possiblity of simply acquiring a push/pull E-stop switch, If anyone knows of a switch like this I would greatly appreciate any information you could give me.

Thank you.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#1

Re: Reset Question

06/06/2008 9:13 AM

You need a Monitoring Safety Relay in there, configured for manual reset (the reset button can be more-or-less as remote as you want - and you can use a key-operated switch for super security). Several companies make them (Guardmaster/Allen Bradley, Piltz, Telemechanique etc) - sorry I haven't got time to sort out a model & circuit right now - if no-one else helps, send me a PM and I'll get back to you over the weekend.

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
Eengineer21
Member

Join Date: Jun 2008
Posts: 9
#2

Re: Emergency Stop Switch and Reset Switch

06/06/2008 9:16 AM

Thanks for the help, I will look that up, I appreciate it.
Register to Reply
ekiechle
Commentator

Join Date: Mar 2008
Location: South Texas - SOMETIMES
Posts: 88
Good Answers: 4
#3

Re: Emergency Stop Switch and Reset Switch

06/06/2008 9:19 AM

The switch you are looking for is made by electroswitch, and is called 86 lockout switch. The switch has a coil that when tripped requires manual reset.

This is commonly used in switchgear protective relaying applications, to prevent operator from restarting faulted equipment..
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
2
Just an Engineer
Guru
Australia - Member - New Member

Join Date: Feb 2008
Location: Australia
Posts: 2181
Good Answers: 255
#4

Re: Reset Question

06/06/2008 9:19 AM

May I suggest that you consult your local (country) codes relating to e-stop protection. While your manager may have some good ideas, generally the legislation will prescribe the acceptable styles of instalation for various "levels" of safety/protection required on equipment.

For instance in most safety systems in Australia, a normally open switch in such a circuit would not be acceptable and in some cases switches must be of multiple circuit to provide failsafe operation of the e-stop.

Consult the standards.

Once you've got that sorted, try Banner, Square D, Cutler Hammer, FESTO or others that specialise in industrial control materials. They all have free access catalogues on the web.

__________________
 Just an Engineer from the land down under.
Register to Reply Good Answer (Score 2)
No more Good Answers. Go to first "Almost" Good Answer
Eengineer21
Member

Join Date: Jun 2008
Posts: 9
#5

Re: Emergency Stop Switch and Reset Switch

06/06/2008 11:04 AM

Thank you everyone, I think I found what I am looking for, I appreciate the great help.
Register to Reply
Just an Engineer
Guru
Australia - Member - New Member

Join Date: Feb 2008
Location: Australia
Posts: 2181
Good Answers: 255
#6
In reply to #5

Re: Emergency Stop Switch and Reset Switch

06/07/2008 5:34 AM

Thanks (from all of us) for the thanks.

Too often the orriginal post does not respond and we end up in suspense as to whether we've been of help.

Oh, by the way, welcome aboard. Hope to see other posts and questions from you.

__________________
 Just an Engineer from the land down under.
Register to Reply
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#7
In reply to #5

Re: Emergency Stop Switch and Reset Switch

06/07/2008 6:28 AM

Comments from myself and CSM Engineer in this thread may also be useful.

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply
Andy Germany
Guru
Popular Science - Weaponology - New Member Safety - ESD - New Member Hobbies - Fishing - New Member

Join Date: Sep 2006
Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E
Posts: 17996
Good Answers: 200
#8

Re: Emergency Stop Switch and Reset Switch

06/08/2008 1:13 AM

May I also suggest that you also use some electrodynamic braking to bring the machine to a complete and sudden stop as well....

__________________
 "What others say about you reveals more about them, than it does you." Anon.
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
vijaygr
Active Contributor

Join Date: Apr 2008
Location: Bangalore,India
Posts: 19
Good Answers: 1
#9

Re: Emergency Stop Switch and Reset Switch

06/09/2008 12:26 AM

You could use Emergency switch of Allen bradley[as path given] which could solve your problem and also go through related links

http://www.ab.com/safety/prod_directory/emergency_stop_devices/cable_pull_switches/lifeline4/index.html

__________________
 Never never never give up
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
Eengineer21
Member

Join Date: Jun 2008
Posts: 9
#10

Re: Emergency Stop Switch and Reset Switch

06/19/2008 7:57 AM

Thank you everyone for your great answers, I ordered and Emergency stop INT-04-120 Relay from GE and its doing the job well, thank you!
Register to Reply
Register to Reply
Have a Different Question?
10 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Andy Germany (1); Eengineer21 (3); ekiechle (1); JohnDG (2); Just an Engineer (2); vijaygr (1)

Previous in Forum: EOT Cranes   Next in Forum: Magnetic Proximity Sensor Equivalent to Hamlin 59070-010
You might be interested in: Emergency Stop Switches, Emergency Call Systems

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (58 right now)
Show Members
Advertisement