User Manual

PD-1161 V1.0 Hardware Manual (Rev. 1.15 / 2013-JUL-23) 13
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IN_0
47kO
GND GND
IN_0
100nF
22kO
IN_1/2/3
GND
+3.3V
IN_1/2/3
1nF
GND
10kO22kO
GND
1kO
+5V / pull-up ON
0V / pull-up OFF
PU
Figure 3.5 Internal circuit of IN_0 Figure 3.6 Internal circuit of IN_1/2/3
3.2.3.1 Limit Switches
The PD-1161 can be configured so that a motor has a left and a right limit switch. The motor stops when
the traveler has reached one of the limit switches. An additional home switch might be used for
initialization.
Left stop
switch
Right stop
switch
STOP_L
Motor
Traveler
STOP_R
HOME
Figure 3.7 Limit switches and home switch
3.2.4 Motor Connector
Pin
Label
Description
1
OA1
Motor coil A
2
OA2
Motor coil A
3
OB1
Motor coil B
4
OB2
Motor coil B
Table 3.4 Motor connector
CAUTION!
Keep the electronics free of (metal) particles!
The integrated sensOstep encoder uses a magnet at the end of the motor axis in order to
monitor position. The magnet naturally attracts especially tiny metal particles. These
particles might be held on the top side of the PCB and even worse – start moving in
accordance with the rotating magnetic field as soon as the motor starts moving. This
might lead to shorts of electronic contacts / wires on the board and totally erratic
behavior of the module! Use compressed air for cleaning the module if necessary.