Had occasion to pick up a nice trick for Linx. After a sudden disappearance of a certain PLC, which had been showing in RS Who, a customer support engineer suggested I remove two files in the C:\Program Files\Rockwell Software\RSCOMMON directory. They are both named Harmony, one extension .hrc...
Given a low voltage cable rated at 600VAC, what would be the maximum allowable DC voltage on which the cable could operate and remain within its design withstand, 600VDC or 850VDC? My question comes from a VFD commom bus application where two drive DC buses are interconnected. A 480VAC VF drive...
I need to supply a speed reference (4-20MA) to a vfd from two separate plc systems (4-20 ma outputs) for redundancy. Would prefer to have no user input required to make the selection. Considered using a high-select analog module but this would require a separate loop supply which is...
