Runaway CIM motors

[StevenB]

Originally Posted by Al Skierkiewicz

Did a limit switch jumper on the Jaguar fall out? It is possible that the Jag is trying to get back from a limit condition.

I've never used a Jaguar with limit switches, but I'm confused how this could happen. The switches are supposed to be wired normally-closed, so if a jumper came out the Jaguar would act as if the switch had been pressed. The Jaguar datasheet specifically says that the motor stops when a switch is pressed. Am I missing something?

Originally Posted by Jaguar datasheet

Two limit switch inputs provide a method for immediate shut-down of the motor. The inputs expect typically-closed contacts - one for each direction of rotation.
http://www.ti.com/litv/pdf/spmu064c