The P70360 increments its internal step counter on the ON-toOFF transition of the LED in an opto isolator. Minimum ON and minimum OFF times are both 250 ns. This results in a maximum step input frequency of 2 MHz. Pulses that do not meet minimum times may be ignored by the drive’s electronics. The input circuitry is suitable for use with 5-volt logic (single ended or differential). It is best to drive the input to both logic states rather than utilize open collector transistors
The STEP input is sensitive to high frequency noise and should be supplied through shielded cable.

The DIRECTION input is similar to the step input except that it employs a slower opto isolator. Allow for a 55 µs setup time from changes at the DIR input prior to transition of the STEP input. Failure to meet setup time can result in the drive misinterpreting the intended direction of a step.

The ENABLE input removes current from the motor windings so the axis can be externally moved. The polarity of the ENABLE logic is configurable using P7000Tools. Factory default is ENABLE = ACTIVE OPEN. If the inputs are left open, the drive is enabled.
The input is enabled with 20 mA of current. It is suitable for use with 3 to 5 volt logic. The ENABLE input is digitally filtered and internally de-bounced.
WARNING
Do not depend on the ENABLE input as a safety or ESTOP mechanism. Internal drive failure could result in motion. When disabled, the winding terminals are not at safe potential. The power output from the drive is electrically safe only when the drive is disconnected from the power source

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