UIrobot UIM2842 User Manual page 43

Miniature Integrated Stepper Motor Controller( )
Closed-loop
2) NPN-type Triode
If the LTTL-type sensor (3.3V/0V) is used, you can add a NPN-type triode between the
sensor and the controller S port. Please note to adjust the resistance of R, to ensure that
X
the S port voltage is not higher than 5V. (X=1,2,3)
X
Figure 8-3 NPN-type Triode
User Sensor：LTTL-type Input
3.3V/0V
UIM 2842
R
S
X
NPN
AG
3) Photoelectric Isolation Module
No matter which type of TTL-level sensor you use, connect a photoelectric isolation module
between the sensor and the controller S port, which can ensure the controller accurately
X
and effectively identify the edge of TTL, and make the corresponding action. The
photoelectric isolation module has strong anti-interference, and it is recommended to be
used in factories, interference occasions. Please note that the resistance of R should be
adjusted to ensure that the current flowing through the photoelectric isolation module is
10mA. (X=1,2,3)
Figure 8-4 Photoelectric Isolation Module
User Sensor
UIM 2842
R
S
X
10mA
AG
Photoelectric
Isolation Module
Note: You can choice the photoelectric isolation module of UIROBOT company or you can
also configurate by yourself.
Besides measuring the voltage input and providing the reads to the user device when
inquired, the sensor control module is able to carry out a certain control action when a
sensor event happens. Actions and sensor events can be defined by instructions. With the
Sensor Control Module, UIM2842 can perform motion controls without the user device.
UI Robot Technology Co. Ltd. M4220170607EN Page 43