Hello everyone, we have a machine in our plant that uses several PowerFlex 525 drives. The Relay Out 2 (NC) on these drive is being used to monitor whether or not the motor is running (Par 81 = 2 - MotorRunning) in order to reset the safety relay. The machine has not even been in our plant for a year and we have replaced two or three of these drives because the relay is stuck open and we are unable to reset the safety relay.
Has anyone else experienced issues with these relay outputs failing? Would it be okay to eliminate the monitoring of the drives through the relay output? The output of the safety relay goes directly to the Safe-Torque Off inputs (S1 and S2). So, in theory, the drive would never be running because it should be faulted due to an open safety (F059 - Safety Open).
Has anyone else experienced issues with these relay outputs failing? Would it be okay to eliminate the monitoring of the drives through the relay output? The output of the safety relay goes directly to the Safe-Torque Off inputs (S1 and S2). So, in theory, the drive would never be running because it should be faulted due to an open safety (F059 - Safety Open).