User Manual

PD57/60/86-x-1260 Hardware Manual • Hardware Version V1.10 | Document Revision V1.20 • 2019-03-22
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7 I/Os
The I/O connector (8pin JST PH series) offers one analog input, two non-isolated digital inputs with
integrated pull-ups (programmable) and two optically isolated inputs. All inputs can be used for different
purposes explained in more detail in the following subsections.
7.1 Analog input IN0
The PD57/60/86-x-1260 offers one analog input. The analog input voltage range is approx. 0..+10V. For
voltages above +10V saturation takes place but, up-to 30V higher voltages are tolerated without destroying
the input. For analog to digital conversion the integrated ADC of the on-board microcontroller is used.
Resolution of this converter is 12bit (0..4095).
100nF
10k
22k
2k2
+3V3
microcontroller
microcontroller
IN0
+5V
TMCM-1260
pull-up
disabled
V
0..10V
Figure 4: Analog input IN0
The analog input can be used as digital input, also. There is an integrated pull-up to +5V which can be
switched on of off in software. When using this input as anlog input the pull-up should be usually switched
off.
7.2 Digital inputs IN1 and IN2
The PD57/60/86-x-1260 offers two digital inputs IN1 and IN2 which accept signals between 0 and 30V
with voltages above approx. 2.9V recognized as logical ’1’ and below 1V as logical ’0’. Both inputs offer
intergated pull-ups to +5V which can be switched on or off in software (always together). When using the
inputs with low-side switches (connected to GND), pull-ups usually should be switched on (default). In case
high-side switches are used the pull-ups must be switched off. For push-pull signals the pull-ups may be
either switched on or off.
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