EM422S Digital Stepper Drive User Manual
Page | 4
DIR-
controls motion rotation direction; in double pulse (CW/CCW) control mode, this input signal
controls counterclockwise (CCW) rotation direction and is active at both voltage high level and
low level.
ENA+
Enable Connection: Optional.
(1)
Optically isolated, differential.
(2)
Disable the drive by 5-24V
input connection; enable the drive by 0-0.5 VDC connection.
(3)
This connection is optional
(defaulted to unconnected) with drive enabled.
(4)
By default, motor shaft is unlocked when drive
disabled but can be configured to shaft locked by DIP switch SW15.
ENA-
!
Notice
Notes:
to avoid interference: (1) shield control signal wires; (2) don’t tie PUL/DIR control signal cable and motor
wires together;
3.2 P2 - Fault Output Connector
Pin
Details
ALM+
Fault Output Connection: Optional.
(1)
Maximum 24V/80mA output when over-voltage and
over-current error protections activated.
(2)
Sinking or sourcing.
(3)
The resistance between
ALM+ and ALM- is low impedance as default (configurable by DIP switch SW12), and will
change to high when the drive goes into error protection.
ALM-
3.3 P3 - Power Connector
Pin
Details
GND
Connect to power supply ground connection.
+VDC
Connect to power supply positive connection. Suggest 18-36VDC power supply voltage
!
Warning
Warning:
Don’t plug/unplug P3 o
r any P1/P2/P4 terminal
block to avoid drive damage or injury while powered on.
3.3 P4 - Motor Connector
PIN
Details
A+
Connect to motor A+ wire
A-
Connect to motor A- wire
B+
Connect to motor B+ wire
B-
Connect to motor B- wire
3.5 Status LED Lights
There are two LED lights for EM422S. The GREEN one is the power indicator which should be always on in normal
circumstance. The RED one is a drive status indication light, which will be OFF while working normally but ON and
flash 1-2 times in a 3-second period in the case of enabled over-voltage or over-current protection.
4. Control Signal and Fault Output
4.1 Control Signal Connection
The EM422S can accept differential or single-ended control signals (pulse, direction, and enable) in open-collector or
