Created Date: November 08,2000

Created by: dcharv

We are using a D0-05DR with F0-04AD-1 analog input card and an OP-613 display. A common 24VDC power supply powers the DIs, the DOs, 4 2-wire 4-20mA transmiters connected to the F0-04AD-1 and the OP-613 display.

The problem is that we have repeated failures of the F0-04AD-1 card.

Has anyone had any experience with a similar system (D0-05 + AI + OP panel) ?

Any suggestion is welcome.

Created Date: December 01,2000

Created by: Mike McClanahan

Make sure that your 24 vdc power supply is capable of supplying the startup current to the display panel. We had a similar problem with the 1500 panels and found out that the 1500 panel has a startup current of about 10 amps so we powered the panel from a seperate power supply and our plc problems went away.

You did not state the kind of failure with the analog module (hard failed requiring replacement or soft fail requiring a reboot of the plc). we are using the analog module with 05's (no panels) and are not having a problem with this.

If you are having hard failures I suggest that you look for induced voltage transients being induced into the analog line from a motor line being run in close proximity to the analog signal line. Also make sure that your 120vac input to the power supply has a surge supressor installed on it. Also I do not recommend using switching power supplies with any plc product for the 24 vdc supply, some of the supplies do not regulate well on power up and can spike the 24 vdc line with a large voltage spike.

Created Date: December 01,2000

Created by: dcharv

Thanks for the advice,

The failures we had were hard failures.

We do have a surge protector. We changed the PLC from AC to DC powered version, and instaled 3 separate power supplies, one for the OP, one for the analog inputs and one for the PLC and DIs and DOs. Having a separate power supply for the AI card is also what the technical support from automationdirect sujested. It seems that the problem is gone now. However I don't like this solution with 3 power supplies in a small box.

Created Date: December 04,2000

Created by: senojlr

I have been having the same type problems with the 05 analog card. I have sent about 15 cards back for warranty. I have tried all of the recommended fixes and continue to have problems. I have never had this many failures with any of the Automation Direct products in the past. They have always been very reliable. I think that they have a problem with this card that has not been worked out yet. I am going to go back to using the 205 in my small applications that require analog until I am sure that the problem has been cured. I don't recall ever having a 205 analog card failure.