adccommunitymod (AutomationDirect) asked a question.
0 - 7 Volts Discrete Input
Created Date: April 26,2007
Created By: yura
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Can anyone help me with the problem? I have an ultrasonic detector. Signals are discrete - 0 - nothing( "0 "), +7V - something( "1 "). Is there any "normalizer " to connect to my DL06 onboard inputs ( "0 - 1 " sensitivity edge is 10.8V)?
Created Date: April 26,2007
Created by: KPrice
yura, There would be a number of ways to do this, but I'm not finding any off-the-shelf devices. Solid-State Relays, large input voltage range(3.5-32VDC) to handle your 7V, but you would need to add resistance across your input to assure turn-off. Coil-type relays would handle the PLC input, but you would need to add resistance in series with the coil to reduce your 7V down to the 6V coil rating. I haven't seen any voltage-sensing relays with the drop-out range adjustable down to your 7V. Hope this gives some more ideas.
Created Date: April 26,2007
Created by: yura
Thanks, KPrice. Pity, but I guess I was right feeling that I would make such "normalizer " by myself. Opto-pair or transistor and resistor... hmm... gone preparing some solder etc... http://forum1.automationdirect.com/board/frown.gif
Created Date: April 27,2007
Created by: Rompus
Even though you are using your sensor as a discrete input, couldn't you just use a 0-10V input card and the appropriate logic to normalize your signal?
It might be overkill but it seems you could us a F0-04-AD to get the job done. http://web1.automationdirect.com/adc/Shopping/Catalog/PLC_Hardware/DirectLogic_05/Analog_I-z-O/F0-04AD-2
Created Date: April 27,2007
Created by: allukes
You might want to look at these http://www.redlion.net/Products/DigitalandAnalog/SensorsAccessories/Converter%20Modules.html
They go for under $30 and one of them might work for your application.
Created Date: April 28,2007
Created by: yura
Thanks a lot, ev 'ryone! I found proper modules at www.grayhill.com - G5 series... 0-10V modules don't fit me 'cause I have empty DL06 only... http://forum1.automationdirect.com/board/wink.gif
Created Date: April 26,2007
Created by: yura
Can anyone help me with the problem? I have an ultrasonic detector. Signals are discrete - 0 - nothing( "0 "), +7V - something( "1 "). Is there any "normalizer " to connect to my DL06 onboard inputs ( "0 - 1 " sensitivity edge is 10.8V)?