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MA860H Microstepping Driver Manual V1.0
StepperOnline
Figure 10: Typical connection
10. Sequence Chart of Control Signals
In order to avoid some fault operations and deviations, PUL, DIR and ENA should abide by some
rules, shown as following diagram:
Figure 11: Sequence chart of control signals
Remark:
a) t1: ENA must be ahead of DIR by at least 5 s. Usually, ENA+ and ENA- are NC (not connected). See "Connector P1
Configurations" for more information.
b) t2: DIR must be ahead of PUL effective edge by 5s to ensure correct direction;
c) t3: Pulse width not less than 1.5s;
d) t4: Low level width not less than 1.5s.
11. Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Short-voltage and Over-voltage protection
When power supply voltage exceeds 123VAC or +173VDC, over-voltage protection will be activated and Alarm indicator LED will
turn on.
Over-current Protection
Protection will be activated when continuous current exceeds the limit.
Short Circuit Protection
Protection will be activated in case of short circuit between motor coils or between motor coil and ground.
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