User Manual

PD42-x-1140 Hardware Manual (V1.03 / 2018-JAN-25) 11
Copyright © 2012-2018, TRINAMIC Motion Control GmbH & Co. KG
4.4.1 Power and Communication
A 6pin 2mm pitch single row connector is used for power supply, RS485 and CAN serial communication.
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 4.3: Power and communication connector
4.4.1.1 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 PD42-x-1140!
Rule of thumb for size of electrolytic capacitor: c = 1000
μF
A
× I
SUPPLY
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.
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 Fehler! Verweisquelle konnte nicht gefunden
werden., operating values.
There is no reverse polarity protection!
The module will short any reversed supply voltage due to internal diodes of the driver
transistors.