TMCM-1141 Hardware Manual (Rev. 1.06 / 2015-JAN-09)
11
During USB bus powered operation the on-board digital core logic will be powered, only. The digital core
logic consists of the microcontroller itself and also the EEPROM. The USB bus powered operation mode
has been implemented to enable configuration, parameter settings, read-outs, firmware updates, etc. by
just connecting an USB cable between module and host PC. No additional cabling or external devices
(e.g. power supply) are required.
Please note that the module might draw current from the USB +5V bus supply even in USB self powered
operation depending on the voltage level of this supply.
Motor movements are not possible during USB bus powered operation! Apply power to the power
connector (USB self powered operation) in order to be able to move the motor.
3.2.3 Multipurpose I/O Connector
An 8pin 2mm pitch single row connector is available for all multipurpose inputs and outputs.
Pin
1
Label
GND
Direction
Power (GND)
Description
System and signal ground
VDD, connected to VDD pin of the power and
RS485 connector
Open-drain output (max. 100 mA)
Integrated freewheeling diode to VDD
Open-drain output (max. 100 mA)
2
3
4
VDD
Power (Supply)
Output
OUT_0
OUT_1
Output
1
8
Integrated freewheeling diode to VDD
Dedicated analog input,
5
IN_0
Input
Input voltage range: 0… +10V
Resolution: 12bit (0… 4095)
General purpose digital input (+24 V compatible)
Alternate function: left stop switch input
General purpose digital input (+24 V compatible)
Alternate function: right stop switch input
General purpose digital input (+24 V compatible)
Alternate function: home switch input
6
7
8
IN_1
IN_2
IN_3
Input
Input
Input
Table 3.4 Multipurpose I/O connector
Note:
-
All inputs have resistor based voltage input dividers with protection diodes. These resistors
also ensure a valid GND level when left unconnected.
-
For all digital inputs (IN_1, IN_2, IN_3) a 1k pull-up resistor to +5V can be activated. In this case
these inputs have a default (unconnected) logic level of 1 and an external switch to GND can
be connected. This might be especially interesting in case these inputs are used as STOP_L /
STOP_R and HOME switch inputs (alternate function).
3.2.3.1 Digital Inputs IN_1, IN_2, IN_3
The eight pin connector of the TMCM-1141 provides three multipurpose digital inputs IN_1, IN_2 and
IN_3. All three inputs accept up to +24V (nom.) input signals and offer the same input circuit with voltage
resistor dividers, limiting diodes against over- and under-voltage and programmable 2k2 pull-up resistors.
The pull-ups can be switched on or off for all three inputs at once in software.
With TMCL firmware command SIO 0, 0, 0 will switch-off the pull-ups and command SIO 0, 0, 1
will switch them on (see separate TMCL firmware manual, command SIO for more detailed information).
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