User Manual

TMCM-1160 V1.01 Hardware Manual (Rev. 1.01 / 2012-JUL-27) 12
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All three digital inputs are connected to the on-board processor and can be used as general purpose
digital inputs!
3.2.3.2 General Purpose Inputs IN_0 and IN_1
The eight pin connector of the TMCM-1160 provides two general purpose inputs which may be used as
either digital or analog inputs.
GENERAL PURPOSE INPUTS AS ANALOG INPUTS
As analog input they offer a full scale input range of 0… +10 V with a resolution of the internal analog-to-
digital converter of the microcontroller of 12bit (0… 4095). The input is protected against higher voltages
up to +24 V using voltage resistor dividers together with limiting diodes against voltages below 0 V
(GND) and above +3.3 V DC.
+3.3V
IN_0,
IN_1
ADC input
(microcontroller)
22k
10k
100nF
GND
GND GND
Figure 3.7 General purpose inputs (simplified input circuit)
3.2.3.3 Outputs OUT_0, OUT_1
The eight pin connector of the TMCM-1160 offers two general purpose outputs OUT_0 and OUT_1. These
two outputs are open-drain outputs and can sink up to 1 A each. The outputs of the N-channel MOSFET
transistors are connected to freewheeling diodes each for protection against voltage spikes especially
from inductive loads (relays etc.) above supply voltage.
- In case free-wheeling diodes are connected to VDD supply voltage: none of the two outputs should
be connected to any voltage above supply voltage of the module.
- It is recommended to connect +V
logic
of the power connector to the power supply output in case the
outputs OUT_0/1 are used to switch inductive loads (e.g. relays etc.).
+V
Logic
microcontroller
GND
Figure 3.8 General purpose outputs