SDC107 –DC motor driver user manual
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8
3.4
Position limit inputs (LIMIT-LEVEL – S5)
The driver has two inputs (LIMIT-L and LIMIT-P) allowing the motor to stop after activation of the input depending
on the current motor direction (DIR input).
Direction
DIR input
Input
LIMIT-L
Input
LIMIT-R
Operation status
OFF
Active
…
Stopped
OFF
Inactive
…
Operating
ON
…
Active
Stopped
ON
…
Inactive
Operating
The S5 switch determines the type of limit sensors used. When S5 = OFF it is for NO (Normal Open) sensors, when
S5 = ON it is NC (Normal Close) sensors.
For 3-wire applications (e.g. inductive), use sensors with PNP output. When using sensors with NPN output, the
LIMIT N / P input should be pulled up to + VDC with a 2.2k ohm resistor, taking into account the reverse logic of
the sensors.
A)
Example of connecting the driver to the motor driving the screw with limited movement in two
directions with NO type sensors
Picture. 5 Connection sensors NO type.
B)
Example of connecting the driver to the motor driving the screw with limited movement in two
directions with NC type sensors
Picture. 6 Connection sensors NC type.
