TMCM-1160 V1.01 Hardware Manual (Rev. 1.02 / 2013-JUL-23)
11
3.2.3 Multipurpose I/O Connector
A 2mm pitch 8-pin JST B8B-PH-K connector is used for connecting general purpose inputs, home and stop
switches and outputs to the unit:
Pin
Label
Description
General purpose output, open drain (max. 1A)
Integrated freewheeling diode connected to +VLogic
1
OUT_0
General purpose output, open drain (max. 1A)
2
3
4
5
6
OUT_1
IN_0
Integrated freewheeling diode connected to +VLogic
General purpose input (analog and digital), +24V compatible
Resolution when used as analog input: 12bit (0..4095)
General purpose input (analog and digital), +24V compatible
Resolution when used as analog input: 12bit (0..4095)
Left stop switch input (digital input), +24V compatible,
programmable internal pull-up to +5V
1
IN_1
STOP_L
STOP_R
8
Right stop switch input (digital input), +24V compatible,
programmable internal pull-up to +5V
Home switch input (digital input), +24V compatible, programmable
internal pull-up to +5V
7
8
HOME
GND
Module ground (system and signal ground)
Table 3.4 Multipurpose I/O connector
All inputs have resistor based voltage dividers with protection diodes. These resistors also ensure a valid
GND level when left unconnected.
For reference switch inputs (STOP_L, STOP_R, HOME) a 1k pull-up resistor to +5V can be activated
(separately for each input). Then these inputs have a default (unconnected) logic level of “1” and an
external switch to GND can be connected.
3.2.3.1 Digital Inputs STOP_L, STOP_R, and HOME
The eight pin connector of the TMCM-1160 provides three reference switch digital inputs STOP_L, STOP_R
and HOME. All three inputs accept up to +24 V input signals. They are protected against these higher
voltages using voltage resistor dividers together with limiting diodes against voltages below 0 V (GND)
and above +3.3 V DC.
+5V
programmable in software
1k
+3.3V
STOP_L
STOP_R
HOME
10k
22k
microcontroller (all)
and TMC429 (STOP_L, STOP_R)
100nf
GND
GND
GND
Figure 3.6 STOP_L, STOP_R and HOME inputs (simplified input circuit)
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