EM422S Digital Stepper Drive User Manual
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Side mounting recommended for better heat dissipation
2.4 Elimination of Heat
EM422S’s working temperature is less than 60
℃
(140°F)
It is recommended to use automatic idle-current mode to reduce motor heating. That means set the SW4 pin of
DIP switch at “OFF” position.
It is recommended to mount the drive vertically to maximize heat sink area. Use forced cooling method to cool if
necessary.
3. Connection Pin Assignments and LED Indication
Figure 2
Connectors, DIP switches, and LED locations
The EM422S has four terminal block connectors P1, P2, P3 & P4 (see above picture), and two DIP switch selectors S1
& S2. P1 is for control signal connections, P2 is for fault output, P3 is for power connection, and P4 is for motor
connection.
3.1 P1 - Control Connector Configurations
PIN
Details
PUL+
Pulse Connection: Required.
(1)
5-24V, optically isolated, differential.
(2)
Maximum 200 KHz
input frequency.
(3)
Pulse width of 2.5μs or longer.
(4)
In single pulse (step & direction) control
mode, this input signal represents a pulse which is active at the rising or falling voltage edge (set
by DIP switch SW13); in double pulse (CW/CCW) control mode, this input signal represents
clockwise (CW) pulse which is active at both high voltage level and low voltage level.
PUL-
DIR+
Direction Connection: Required.
(1)
5-24V, optically isolated, differential.
(2)
Maximum 200
KHz input frequency.
(3)
Pulse width of 2.5μs or longer.
(4)
Minimal DIR signal setup time
should be at least 5μs.
(5)
In single pulse (step & direction) control mode, this signal represents
