Safety Signals DI880 cross-wire detection

We want to use AC800M HI controller and the S800 IO as our safety system.

Does the DI880 modules have a cross-wire detection?


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lukas_b   

asked 1 month ago
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Answers

0

Hi,

If I understood your question correctly, you want detect reverse polarity connection on DI880 module? If yes, we can't detect this with DI880 module. Since the inputs of this module is dry contacts like switches, proximity etc..

Hope it helps you.

Kumaraswamy.B   

answered 1 month ago


 


By lukas_b on 4/23/2018 | Like (0) | Report

It's not exactly what I mean. When I have a 2 wire safety signal with 2 inputs für SIL3, does the card recognize if the wire is broken and the 24vdc come from the other chanal


By Kumaraswamy.B on 4/23/2018 | Like (0) | Report

Oh ok. Loop monitoring is not possible with DI880 module. We use AI880 as DI for loop monitoring of digital inputs. This needs suitable resistors to be installed on field side (close to field devices).


By lukas_b on 4/23/2018 | Like (0) | Report

I know from other safety System, that they use a pulse signal on each channel (24V output with pulse signals) to be sure that the is no false 24v on this input.


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