Posted 18 Sep 2007 I've been playing with this little PLC and it's not bad at all just to do basic relay functions. My question is if the Omron Zen is capable of reading 4-20ma devices? Thanks, TioPaeng Share this post Link to post Share on other sites
Posted 18 Sep 2007 (edited) Welcome to the forum. The DC powered ZEN units have two 0 - 10 vdc analog inputs. You could convert the 4-20mA to 1-5vdc using a 250 ohm resistor. You would loose some resolution, but it should work. Hope this will help. Edited 18 Sep 2007 by gtsuport Share this post Link to post Share on other sites
Posted 18 Sep 2007 Thanks for info, I'm trying to install a 4-20ma vacuum transducer and when it detects a vacuum drop it will send out an alarm and turn the other backup vacuum on. Is this possible with the Zen? Thanks for the fast reply, TioPaeng Share this post Link to post Share on other sites
Posted 19 Sep 2007 gtsuport is correct. According to the manual the DC Zens have 2x 0-10VDC inputs ONLY!! Share this post Link to post Share on other sites