Vexta aStep AS Series Operating Manual page 37

1-pulse input mode
Connect the pulse signal of the controller to pin No.11 and No.12, and the rotating direction
signal to pin No.9 and No.10, respectively.
1.
When the DIR input is "ON," a rise of the "PLS input" from "OFF" to "ON" will rotate the
motor one step in the CW direction.
2.
When the DIR input is "OFF," a rise of the "PLS pulse input" from "OFF" to "ON" will rotate
the motor one step in the CCW direction.
ON
PLS input
(Pulse)
OFF
ON
DIR input
(Rotating direction)
OFF
Motor operation
The voltage of pulse and rotation direction input to the PLS input and DIR input shall be 5 VDC.
If the voltage exceeds 5 VDC, connect an external resistor to limit the input current to nearly
10 mA.
Use an input pulse signal with a waveform having a sharp rise and fall, as shown in the figure:
1 µs minimum
2 µs maximum
The figure shows the voltage levels of pulse signals.
∗
CW CCW
CW
CCW
-
V 1.5
-
R = 220 [Ω]
10 mA
H
90%
10%
L
2 µs maximum
H: 4~5 V
L: 0~0.5 V
∗ The minimum interval time needed for
switching the direction of rotation will
vary, depending on the operating speed
and size of the load.
Do not shorten the interval time any more
than is necessary.
2 µs minimum
37