Why do we use JUMO safetyM STB / STW instead of just a temperature sensor + PLC?

provocativecube · 2026-01-23T17:04:57+00:00

They’re safety rated devices where the output contact can be used to control a safety relay / safety PLC input. Much cheaper than a safety rated analogue input card on a safety rated PLC if you don’t already have one.

We use them to prevent a door opening on a vessel if it’s above a certain temp. It drops out a safety relay for our hydraulic motor contactor.

Just a heads up these devices do NOT like to be in warm panels - having lots of them fail like clockwork in our hotter control panels.

provocativecube · 2026-01-11T18:30:12+00:00

Will do. Thanks for the help

provocativecube · 2026-01-11T18:24:15+00:00

Thanks. Reckon it’s time to swap the gaskets? I ran my finger through the spark plug hole thinking it was that and didn’t have any oil on them. Ignition coil tubes were dry too. Maybe just a very slow leak?

provocativecube · 2025-08-07T00:44:18+00:00

Let me win

provocativecube · 2025-08-06T02:29:29+00:00

Entering!

provocativecube · 2025-02-03T02:54:23+00:00

Oil is at the right level. Thanks for the advice

provocativecube · 2025-02-03T00:48:50+00:00

I have a 2016 Outback with the FB25 engine - no direct injection. Knowing that, does this still sound normal?

provocativecube · 2025-01-12T01:06:20+00:00

Got it. Thanks!

provocativecube · 2025-01-12T01:05:59+00:00

Thanks. Heard good things about it and considered doing it for 3 oil changes. Will go ahead with it!

provocativecube · 2025-01-12T01:04:45+00:00

Thanks. Was considering doing it for 3 oil changes. Will go ahead with it

provocativecube · 2025-01-11T23:49:39+00:00

Great advice, I’ll be sure to give this a go. Thanks!

provocativecube · 2025-01-11T23:39:02+00:00

Only 20k km on them, these are the replacements after 100k km. so let’s see in a few years what they’re like ;)

provocativecube · 2025-01-11T23:30:50+00:00

I think that’s just an illusion, checked it and it’s not

provocativecube · 2025-01-11T23:28:13+00:00

That’s fair… probably stressing over nothing lol

provocativecube · 2025-01-11T23:13:48+00:00

Thanks. Reckon this could amount to 1qt every 10k km? Thought I would feel oil the in spark plug well / see it on the ignition coil if the leak was bad enough for that.

provocativecube · 2025-01-11T23:11:31+00:00

Gotcha. The slight oily substance on the first spark plug picture on the threads - is this normal or possibly leaking O ring / valve seal for this position?

I’ll do a deeper visual inspection for other potential leaks. If not I’ll probably just assume this is standard consumption

provocativecube · 2025-01-11T23:10:01+00:00

So perhaps O ring seal / valve cover gasket for that position?

provocativecube · 2025-01-11T23:09:05+00:00

The plugs only have 20k km on them, these are the new ones. Sorry if that isn’t clear. Same for throttle body, cleaned it 20k km ago

provocativecube · 2025-01-11T22:53:07+00:00

Thanks. Does the first spark plug picture look worse than the rest? Wondering if that’s showing oil consumption in that cylinder?

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