User Manual

TMCM-1140 V1.3 Hardware Manual (Rev. 1.04 / 2015-JAN-05) 8
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3.3.1 Power and Communication Connector
A 6pin CVIlux CI0106P1VK0-LF 2mm pitch single row connector is used for power supply, RS485 and CAN
serial communication. Please note the additional power supply information in chapter 3.3.1.1.
Note: CAN interface will be de-activated in case USB is connected due to internal sharing of hardware
resources.
6
1
Pin
Label
Direction
Description
1
GND
Power (GND)
System and signal ground
2
VDD
Power (Supply)
VDD (+9V…+28V)
3
RS485+
Bidirectional
RS485 interface, diff. signal (non-inverting)
4
RS485-
Bidirectional
RS485 interface, diff. signal (inverting)
5
CAN_H
Bidirectional
CAN interface, diff. signal (non-inverting)
6
CAN_L
Bidirectional
CAN interface, diff. signal (inverting)
Table 3.2 Connector for power supply and interfaces
3.3.1.1 Power Supply
For proper operation care has to be taken with regard to power supply concept and design. Due to space
restrictions the TMCM-1140 includes about 40µF/35V of supply filter capacitors. These are ceramic
capacitors which have been selected for high reliability and long life time. The module includes a 28V
suppressor diode for over-voltage protection.
CAUTION!
Add external power supply capacitors!
It is recommended to connect an electrolytic capacitor of significant size (e.g. at least
470µF/35V) to the power supply lines next to the TMCM-1140!
Rule of thumb for size of electrolytic capacitor:   


 

In addition to power stabilization (buffer) and filtering 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 filter capacitors
may cause stability problems with some switching power supplies.
Do not connect or disconnect motor during operation!
Motor cable and motor inductivity might lead to voltage spikes when the motor is
disconnected / connected while energized. These voltage spikes might exceed voltage
limits of the driver MOSFETs and might permanently damage them. Therefore, always
disconnect power supply before connecting / disconnecting the motor.
Keep the power supply voltage below the upper limit of 28V!
Otherwise the driver electronics will seriously be damaged! Especially, when the selected
operating voltage is near the upper limit a regulated power supply is highly
recommended. Please see also chapter 7, operating values.
There is no reverse polarity protection!
The module will short any reversed supply voltage due to internal diodes of the driver
transistors.