NS Dev
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 posted on 31/1/07 at 11:53 AM |
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Work electrical question
Just a quickie,
I'm no electrician, but I am currently looking at fitting a wireless LAN-enabled I/O module on one of our extruders as a pilot project to a full
wireless LAN based monitoring and andon system.
Much simpler though is that the ADAM-6000 series I/O module needs 24v ish DC digital wet contact input and I only have 110v ac in the panels.
What's a cheap and dirty way to give my module 0-30vdc on/off input from 110vac on/off which i have available?
cheers
Nat
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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jamesbond007ltk
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| posted on 31/1/07 at 12:06 PM |
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did your module come with a 240AC to 30dc transoformer?
If so one thought would be to use a USA to UK Step-Up transformer to give you the 240V and then transform that to the desired 30Vdc. Maplin do the
step ups for 26.99 (iem number UP90X).
You wanted dirty! well there you go. Pretty cheap too, provided you already have the 240AC to 30DC trnsfmr
Rich
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NS Dev
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| posted on 31/1/07 at 12:19 PM |
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No, we will be using a 110v to 24v transformer to feed the unit (all the power supplies in that section of the plant are 110v and it's not met
PLC control yet so no 24v supplies around either yet)
We can't very well transform all the inputs, I'm thinking I'll need to make a relay board up for each unit and switch 24vdc for the
module from the 110v alarm signals.
The modules are great little things, but clearly the idea is to use them with plc systems and while they are everywhere else, they are not present in
the bit of the plant we are working in!
I just wondered if there was a common off the shelf couple of quid solution as the 110vac vs 24vdc problem is one I have come across in nearly every
plant I have been in!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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MikeR
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| posted on 31/1/07 at 12:39 PM |
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24v dc? not as easy (a quick google pulled up a few 24vac units for security cameras.)
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Coose
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| posted on 31/1/07 at 12:49 PM |
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Try this. I use their kit often and it's decent quality.... 
I don't know if they sell to Joe Public though.....
Spin 'er off Well...
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Peteff
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| posted on 31/1/07 at 01:35 PM |
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Would a 24 volt battery charger do it, it would be DC for definite.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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02GF74
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| posted on 31/1/07 at 02:05 PM |
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quote:
Originally posted by NS Dev
Much simpler though is that the ADAM-6000 series I/O module needs 24v ish DC digital wet contact input and I only have 110v ac in the panels.
What's a cheap and dirty way to give my module 0-30vdc on/off input from 110vac on/off which i have available?
these 24 V signals - what sort of current will they need and what switching speed?
simple, cheap and very dirty, diode, 2 resistors and capacitor to smooth the AC down a bit.
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ReMan
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| posted on 31/1/07 at 04:47 PM |
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Is this the sort of thing you need, a 24Vdc Power Supply?
They should be pretty common from many sources.
http://www.baldor.co.uk/products/accessories/psu.asp
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paulf
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| posted on 31/1/07 at 05:42 PM |
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Could you use a small 24v power supply and some soilid state relays ? RS do a good range of soilid state relays which would be more reliable than mech
relays.
Paul.
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NS Dev
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| posted on 1/2/07 at 07:58 AM |
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cheers folks, yep I think solid state relays or opto-couplers will be the best bet for coupling the 110vac to 24vdc
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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