PD42-
x
-1370 Hardware Manual • Hardware Version V1.10 | Document Revision V1.10 • 2018-AUG-18
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6 I/Os
The power supply, communicaiton and I/O connector (10pin JST PH series) offers four digital inputs with
integrated pull-ups and and one output (open-drain).
6.1 Digital inputs HOME, STOP_L, STOP_R and /ENABLE
The PD42-
x
-1370 offers four digital inputs IN0. . . IN3 which accept signals between 0 and 28V (positive
supply voltage limit) with voltages above approx. 2V recognized as logical ’1’ and below 0.8V as logical ’0’.
All four inputs offer intergated pull-ups to +5V (fixed). Depending on configuration in software these four
inputs also offer dedicated functionality as HOME, STOP_L, STOP_R and /ENABLE inputs.
100pF
27k
4k7
+3V3
microcontroller
IN0...IN3
+5V
TMCM-1370
Figure 4: Digital inputs HOME, STOP_L, STOP_R and /ENABLE
6.2 Digital output (open-drain)
The PD42-
x
-1370 offers one digital output (open-drain). The output offers an integrated pull-up to +5V in
order to ensure valid signal levels even while the output is switched off. The oputput can sink up-to 100mA
and withstand voltages up-to 28V (positive supply voltage limit) while switched off.
4k7
microcontroller
OUT
+5V
TMCM-1370
4k7
Figure 5: External encoder input
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