text: <s>[INST] Power Flex 755 encoder card Summary: What might be reasons that causes encoder card failure in powerflex 755 drives. [/INST] We've encountered a number of ENC1 incremental encoder input card failures for PF750 drives (one customer's drive has eaten 3 of them, I think). We never found a convincing reason. Sorry, no solution, but you're not alone either. How many cards failed so far? \\n </s>