ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
by HotLine1. 03/20/18 07:33 AM
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
MAAX Spas Recalls Hot Tubs and Swim Spas
by Admin. 03/13/18 10:29 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (HotLine1), 25 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Safety Circuits Category 3 & 4 #150983
03/12/06 03:20 AM
03/12/06 03:20 AM
ZAURUS  Offline OP
Junior Member
Joined: Mar 2006
Posts: 2
Zurich, Zurich, Switzerland
Does anyone know any publications about Safety Control Systems built up with safety relays?
I am specifically looking for schematics of electomechanical relay systems, that monitor two door switches (very typical application).
Usually this type of safety relays are used in the circuits:

Thanks a lot for any help.

Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Safety Circuits Category 3 & 4 #150984
03/12/06 06:19 AM
03/12/06 06:19 AM
Trumpy  Offline

Joined: Jul 2002
Posts: 8,236
SI,New Zealand
Is this a sales pitch?.

Reason I say that is not many people come straight into here with a link like that.

I've worked with a lot of Safety Relays before would you like to talk specific applications?.

Are they Ex-D certified? (CENELEC)

[This message has been edited by Trumpy (edited 03-12-2006).]

Re: Safety Circuits Category 3 & 4 #150985
03/12/06 07:50 AM
03/12/06 07:50 AM
ZAURUS  Offline OP
Junior Member
Joined: Mar 2006
Posts: 2
Zurich, Zurich, Switzerland
Of course this is NOT a sales pitch.

I just want to make sure everybody knows what I am talking about. I am not looking for publications that are describing top-level applications, such as wiring complete safety modules.

Of course any type of "safety relay" used is fine as long they are built according to EN50205 / ICE61810-1. The one I showed is just unique in many ways of providing better fault recognition with the pair wise contacts coupling system.
I am looking for applications that typically have two door switches as control signals, and provide a safe switching output for the load output. I have found one book so far from a German organization, the BIA-Report, where they discuss such applications, applications in accordance with then EN 954-1.
If any one knows more of this kind of publications, I would appreciate very much any reply.


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Bill Addiss
Bill Addiss
Posts: 3,890
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 5
Trumpy 5
Popular Topics(Views)
244,416 Are you busy
181,531 Re: Forum
171,581 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.013s Queries: 14 (0.003s) Memory: 0.9520 MB (Peak: 1.0747 MB) Zlib enabled. Server Time: 2018-03-20 11:56:53 UTC