EM542S Digital Stepper Drive User Manual
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Figure 3
Connections to open-collector signals
Figure 4
Connections to PNP signals
(Common-anode)
(Common-cathode)
4.2 Fault output connection
When over voltage or over current protection happens, EM542S red status LED light will blink and the impedance
state between ALM+ and ALM- will change (from low to high or high to low depending on configuration) and can thus
be detected. Fault output connection is optional, and it can be connected either in sinking or sourcing.
Figure 5
Sinking
output
Figure 6
Sourcing output
5. Stepper Motor Connections
EM542S can drive 2-phase and 4-phase bipolar hybrid stepper motors with 4, 6, or 8 wires. Although setting the output
current to 1.4 times of motor phase current will get maximum torque from the motor, at the same time motor heating
will be also maximized. So, just configure the drive output current to a value which will get sufficient torque to reduce
motor heating.
5.1 4-lead Motor Connection
Refer to figure 7 for how to connect a 4-wire stepper motor. Configure EM542S output current to one of the 8 available
values through DIP switches SW 1-3 of the DIP switch selector 1 (figure 2).
Figure 7
4-lead Motor Connection
