User Manual
PD-1160 V1.1 Hardware Manual (Rev. 1.02 / 2013-JUL-23) 9
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3.2.1 Power Connector
This PANdrive offers separate power supply inputs for digital logic (pin 2) and driver/power stage (pin 1).
Both supply inputs use common ground connections (pin 4). This way, power supply for the driver stage
may be switched off while still maintaining position and status information when keeping digital logic
supply active. Due to internal diode the digital logic supply has to be equal or higher than the
driver/power stage supply. Otherwise the diode between driver/power stage supply and digital logic
supply might short the separate supplies.
+U
DRIVER
SUPPLY ONLY
In case power supply is provided only to the power section (pin 1) an internal diode will distribute
power to the logic section. So, when separate power supplies are not required it is possible to just use
pin 1 and 4 for powering the module. If so, pin 2 (logic supply) and pin 3 (/SHUTDOWN input) can be
connected together in order to enable the driver stage.
ENABLING THE DRIVER STAGE
Connect /SHUTDOWN input to +U
Driver
or +U
Logic
in order to activate the driver stage. Leaving this input
open or connecting it to ground will disable driver stage.
A 4-pin JST EH series B4B-EH connector is used as power connector on-board.
4
1
Pin
Label
Description
1
+V
Driver
Module + driver stage power supply input
2
+V
Logic
(Optional) separate digital logic power supply input
3
/SHUTDOWN
Shutdown input. Connect this input to +V
Driver
or +V
Logic
in order
to activate driver stage. Leaving this input open or connecting it
to ground will disable driver stage
4
GND
Module ground (power supply and signal ground)
Table 3.2 Connector for power supply
3.2.1.1 Power Supply
For proper operation care has to be taken with regard to the power supply concept and design. Due to
space restrictions the TMCM-1160 module includes about 20 µF / 100 V of supply filter capacitors. These
are ceramic capacitors which have been selected for high reliability and long life time.
HINTS FOR POWER SUPPLY CABLES
- Keep power supply cables as short as possible.
- Use large diameters for power supply cables.
CAUTION!
Add external power supply capacitors!
It is recommended to connect an electrolytic capacitor of significant size (e.g. 2200 µF /
63V) to the power supply lines next to the PD-1160 especially if the distance to the power
supply is large (i.e. more than 2-3m)!
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.