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Steve Spence
Posts: 2
Registered: 02-04-2009
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897H Galvanic Isolator

Application is Class II Division II:  Using 440K Trojan 5 in hazardous area.  Using 897H-G231 Galvanic Isolator in Non-Hazardous area.  I have one wiring diagram that shows using 6.8K resistors in series with the safety switch contacts.  I have another diagram that shows a safety switch and the isolator without resistors.
DF1 Devotee
Steve Spence
Posts: 2
Registered: 02-04-2009
0

Re: 897H Galvanic Isolator

Sorry!  I forgot the question if not obvious.  When are the resistors necessary?
This one is so good … we couldn't think of a title good enough!
fuzzy_logic
Posts: 2,825
Registered: 06-26-2008

Re: 897H Galvanic Isolator

[ Edited ]

If the input is coming from free-contacts (floating) then you may use the resistor to identify Short Circuit or Open wire conditions...

 

Hope this helps…

 

- fuzzy logic

Message Edited by fuzzy logic on 05-12-2009 02:41 PM
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