User Manual

TMCM-1140 V1.3 Hardware Manual (Rev. 1.04 / 2015-JAN-05) 11
www.trinamic.com
2. BUS TERMINATION:
Especially for longer busses and/or multiple nodes connected to the bus and/or high
communication speeds, the bus should be properly terminated at both ends. The TMCM-1140
does not integrate any termination resistor. Therefore, 120 Ohm termination resistors at both
ends of the bus have to be added externally.
3. NUMBER OF NODES:
The bus transceiver used on the TMCM-1140 units (TJA1050T) supports at least 110 nodes under
optimum conditions. Practically achievable number of nodes per CAN bus highly depend on bus
length (longer bus -> less nodes) and communication speed (higher speed -> less nodes).
3.3.2 Multipurpose I/O Connector
An 8pin CVIlux CI0108P1VK0-LF 2mm pitch single row connector is available for all multipurpose inputs
and outputs.
8
1
Pin
Label
Direction
Description
1
GND
Power (GND)
System and signal ground
2
VDD
Power (Supply)
VDD, connected to VDD pin of the power and
communication connector
3
OUT_0
Output
Open-drain output (max. 1A)
Integrated freewheeling diode to VDD
4
OUT_1
Output
+5V supply output (max. 100mA)
Can be switched on/off in software
5
IN_0
Input
Dedicated analog input,
Input voltage range: 0..+10V
Resolution: 12bit (0..4095)
6
IN_1,
STOP_L,
ENC_A
Input
General purpose digital input (+24V compatible)
Alternate function 1: left stop switch input
Alternate function 2: external incremental
encoder channel A input
7
IN_2,
STOP_R,
ENC_B
Input
General purpose digital input (+24V compatible)
Alternate function 1: right stop switch input
Alternate function 2: external incremental
encoder channel B input
8
IN_3,
HOME,
ENC_N
Input
General purpose digital input (+24V compatible)
Alternate function 1: home switch input
Alternate function 2: external incremental
encoder index / zero channel input
Table 3.3 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 2k2 pull-up resistor to +5V can be activated (default
setting with all more recent TMCL firmware versions). Then 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 1) or as encoder input for an external incremental A/B/N encoder with open-
collector outputs (pull-ups are not necessary for encoder with push-pull outputs).