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DaleRobbo

Righto just a quick question.. I've been informed that a safety relay must be used for your estop circuit, but why can't you just use ladder logic to create your estop circuit? Does every one use a safety relay or does anyone use only a Plc logic for your safety circuit?
Thanks,
Dale..
 
I've just put a e-stop circuit in (after some tutoring as its the first one ive done) and have used a 24v DC mini contactor relay, why must a dedicated safety relay be used? I don't have much experience in the safety circuit area so any pointers would be great.

The circuit will also be integrating PLC control which will be providing the 24v signal to operate the contactor coil energising the rest of the circuit.

I have a terrible draweing somewhere, let me find it to make things a little clearer.

Ben
 
Safety relay vs Plc auger diagram - EletriciansForums.netI know its awful, but i hope it gives those who didnt understand what i was talking about before a little more scope
 
Righto just a quick question.. I've been informed that a safety relay must be used for your estop circuit, but why can't you just use ladder logic to create your estop circuit? Does every one use a safety relay or does anyone use only a Plc logic for your safety circuit?
Thanks,
Dale..
What happens to your EM Stop if the plc 'hangs'?
 
We used to use safety relays but now we use safety PLC modules.
 
Come on wade.. you 'like' Tony's post, that just agrees with mine and I get bugger all... If it happens again im going home...and im taking my ball with me...
 
Sorry Spoon. I'm just trying to get back in Tony's good books. You know i like you

- - - Updated - - -

We used to use safety relays but now we use safety PLC modules.

Oh my days your like totally the best..... gawwwdddd
 

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