User Manual

TMCM-1270 Hardware Manual Hardware Version V1.00 | Document Revision V1.20 2017-SEP-27
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Pin no. Pin name Description
4 CAN_L Dierential CAN bus signal (inverting)
5 GND Signal ground connection
6 +5V
5V output, 100mA maximum load, e.g. for end / home switch
circuit or external encoder supply
7 HOME (GPI0)
General purpose input 0, can be used as HOME switch input,
also. Congurable as analog input AIN0 via software (+5V
compatible, internal 10k pull-up to +5V)
8 REFL (GPI1)
General purpose input 1, can be used as left reference / stop
switch input REFL / STOP_L, also. Congurable as incremental
encoder input channel A via software (+5V TTL compatible,
internal 10k pull-up to +5V)
9 REFR (GPI2)
General purpose input 2, can be used as right reference / stop
switch input REFR / STOP_R, also. Congurable as incremental
encoder input channel B via software (+5V TTL compatible,
internal 10k pull-up to +5V)
10 ENN (GPI3)
ENABLE NOT input (active low) for driver stage, 0 = enabled, 1
= disabled (+5V TTL compatible, internal 10k pull-up to +5V)
Table 5: TMCM-1270 Power supply and I/O connector pin assignment
NOTICE
Always keep the power supply voltage below the upper limit of 28V!
Oth-
erwise the driver electronics will be seriously damaged. Especially, when the
selected operating voltage is near the upper limit a regulated power supply is
highly recommended.
NOTICE
Add external power supply capacitors!
It is recommended to connect an elec-
trolytic capacitor of signicant size (e.g. 470
µ
F/35V) to the power supply lines next
to the TMCM-1270!
Rule of thumb for size of electrolytic capacitor: C =
1000µF
A
× I
SU P P LY
In addition to power stabilization (buer) and ltering this added capacitor will
also reduce any voltage spikes which might otherwise occur from a combination
of high inductance power supply wires and the ceramic capacitors. In addition
it will limit slew-rate of power supply voltage at the module. The low ESR of
ceramic-only lter capacitors may cause stability problems with some switching
power supplies.
NOTICE
Tie ENN to GND in order to enable driver stage!
Please note that pin 10 of the
Power supply and I/O connector is a hardware driver stage enable input (active
low) with an internal pull-up resistor. In order to enable motor driver stage and
be able to move the motor using appropriate software commands it is necessary
to tie this input to GND.
4.2 CAN Connection
For remote control and communication with a host system the TMCM-1270 provides a CAN bus interface.
For proper operation the following items should be taken into account when setting up a CAN network:
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