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Specifications subject to change without notice.
Owner's Guide: 3P20M Hybrid Stepper Motor Driver
Page 13
TECHNICAL DOCUMENT
Remark:
a)t1: ENA must be ahead of DIR by at least 5µs. 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 5µs to ensure correct direction;
c)t3: Pulse width not less than 1.5µs;
d)t4: Low level width not less than 1.5µs.
13. Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Over-voltage and Short-voltage Protections
When power supply voltage e51VDC, protection will be activated and power indicator LED will turn red. When over-voltage protection
function is active, the user should repower the driver to reset the driver.
Short-voltage Protection
When power supply voltage is lower than +18VDC, the Green LED will turn off and the Red LED will light. Both green and red LED will turn off when
power supply voltage is lower than +16VDC. The driver will be reset after power supply voltage increase to +20VDC automatically.
Short Circuit Protection
Protection will be activated in case of short circuit between motor coil and ground. When short circuit protection function is active, the user should
repower the driver to reset the driver.
Over-current Protection
Protection will be activated in case of over current which may otherwise damage the driver.
Attention: Since there is no protection against power leads (+, -) reversal, it is critical to make sure that power supply leads
correctly connected to the driver. Otherwise, the driver will be damaged instantly.
