EM870S Digital Stepper Drive User Manual
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2.4 Elimination of Heat
EM870S’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 EM870S has 5 connectors P1, P2, P3, P4 and P5, 3 DIP switches S1, S2 and S3. P1 is for control signal
connections, P2 is for fault output, P3 is for power connection, P4 is for motor connection and P5 is for fine tuning.
3.1 P1 - Control Connector Configurations
PIN
Details
PUL+ (CW+)
Pulse and Direction Connection:
(1)
Optically isolated, high level 4.5-5V or 24V, low voltage 0-0.5V
(2)
Maximum 200 KHz input frequency, 500KHz customized model is available
(3)
The width of PUL signal is at least 2.5μs, duty cycle is recommended 50%
(4)
Single pulse (step & direction) or double pulse (CW/CCW) is set by DIP Switch SW14
(5)
DIR signal requires advance PUL signal minimum 5 μs in single pulse mode
(6)
The activated edge of PUL and DIR is set by DIP Switch SW13
(7)
The factory setting of control signal voltage is 24V,
must need
to set S3 (figure 2) if it is 5V
PUL- (CW-)
DIR+ (CCW+)
DIR- (CCW-)
ENA+
Enable Connection: Optional.
(1)
Optically isolated, differential.
(2)
Disable the drive by 4.5-5.0V or 24V input connection; enable the drive by 0-0.5V
connection(default no connection)
(3)
ENA signal requires advance DIR signal minimum 5μs in single pulse mode
(4)
The default control signal voltage is 24V, to set S3 (figure 2) if it is 5V
(5)
Enable time to be at least 200ms
ENA-
!
Notice
Notes:
(1) shield cables are required for P1; (2) don’t tie P1/P2 cables and P3/P4 cables together.