MD24 / MD28
– Hardware Description
14
Remark:
t
1
- 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
.
t
2
-
DIR must be ahead of PUL effective edge by at least 5µs to ensure correct direction;
t
3
-
Pulse width not less than 1.5µs
t
4
-
low level width not less than 1.5µs.
14 Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Over-voltage protection
When power supply voltage of the MD24 exceeds +52VDC or of the MD28 exceeds
+96VDC, protection will be activated and power indicator LED will turn red. When power
supply voltage is lower than +22VDC, the driver will not works properly.
Coil-ground Short Circuit Protection
Protection will be activated in case of short circuit between motor coil and ground.
Over-current Protection (only MD28)
Protection will be activated when continuous current reaches to 14A.
Wrong Motor Connection Protection (nur MD28)
Protection will be activated when the motor is connected in a wrong way.
Note:
When above protections are active, the motor shaft will be free or the LED will turn
red. Reset the driver by repowering it to make it function properly after removing above
problems.
Attention:
Since there is no protection against power leads (+,-) reversal, it is critical to
make sure that power supply leads correctly connected to driver. Otherwise,
the driver will be damaged instantly.
