20
Explanation of I/O signals
Input signals
The signal states indicate the state of the internal photocoupler (ON: power conducted;
OFF: power not conducted).
PLS input and DIR input
This driver can select either 1-pulse input mode or 2-pulse input mode as the pulse-input
mode to match the controller used. For details on how to set the pulse-input mode, see
page 29, “Pulse input modes.”
1-pulse input mode (factory setting)
The controller pulses are connected to the PLS+ input (pin No.1) or the PLS- input (pin
No.2), and the rotation direction is connected to the DIR+ input (pin No.3) or DIR- input
(pin No.4).
1. When the DIR input is “ON,” a fall of the “PLS input” from “ON” to “OFF” will rotate the
motor one step in the CW direction.
2. When the DIR input is “OFF,” a fall of the “PLS input” from “ON” to “OFF” will rotate the
motor one step in the CCW direction.
+5 V
1, 3
2, 4
PLS-
DIR-
NPN-type
PNP-type
+5 V
1, 3
2, 4
PLS+
DIR+
1
µ
s
min.
2
µ
s max.
90 %
10 %
300
µ
s min.
1
µ
s
min.
2
µ
s max.
CCW
CW
H
L
DIR input
H
L
PLS input
Note
• Do not allow the driver temperature to exceed 158°F (70°C), which is the heat-radiating
plate’s saturation temperature during operation.
• The minimum value for the interval time when switching the rotational direction depends
on the motor’s size, running speed and load moment of inertia.
