Chapter 2 – Installation
23
E-AC Drive Hardware Installation Guide
The input is optically isolated. You can drive the input differentially, or
from a single-ended source.
Step input specifications are:
Input Current: 6.5 mA minimum
15 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
5.2V maximum*
Step Pulse: 200 nanosecond minimum pulse width
200 nanosecond minimum off time
2 MHz maximum pulse rate
Optically Isolated: Yes
*As a custom product, Compumotor can modify drive for higher input voltage
DIRECTION INPUT
While a positive voltage is applied to DIRECTION+ with respect to DIREC-
TION–, the drive will commutate the motor in the clockwise (positive)
direction as it receives step pulses on its step input.
While zero voltage (or a negative voltage) is applied to DIRECTION+ with
respect to DIRECTION–, the drive will commutate the motor in the coun-
terclockwise (negative) direction as it receives step pulses.
The input is optically isolated. You can drive the input differentially, or
from a single-ended source.
Direction input specifications are:
Input Current: 6.5 mA minimum
15 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
5.2V maximum*
Optically Isolated: Yes
Direction Change: Direction input may change polarity coincident with
first step pulse.
*As a custom product, Compumotor can modify drive for higher input voltage
SHUTDOWN INPUT
You can use the shutdown input to shutdown, or disable, the E-AC Drive.
To activate shutdown, apply a positive voltage to SHUTDOWN+ with respect
to SHUTDOWN– when the motor is not moving. During shutdown, the drive
turns off current to the motor. The current stays off as long as the voltage
is maintained on the shutdown input.
When you remove the voltage on the input, shutdown ends. The drive
restores current to the motor, in the same phase relationship that existed
before shutdown was invoked.
The shutdown input may also be differentially driven. Specifications are:
Input Current: 2.5 mA minimum
30 mA maximum
Input Voltage: 3.5V minimum (min. required for on or high signal)
13V maximum
5V maximum reverse voltage
Active Level: While voltage is applied, current to motor is shut down.
When voltage is removed, normal operations resume.
Time: 250 nanosecond minimum width
Optically Isolated: Yes