IDX Manual (V1.15 / September 26
th
, 2008)
10
Copyright © 2005-2008, TRINAMIC Motion Control GmbH & Co. KG
4.2
Step, Direction and Disable Inputs
The inputs disable, dir and step are electrically isolated from the module. The inputs are related to
V
COM
. In a typical application, U
COM
shall be tied to the positive supply voltage of the master and the
inputs are driven by open collector or push / pull outputs. V
OPTOFF
and V
OPTON
must not exceed V
COM
to
avoid reverse polarity for the opto couplers.
OFF: V
COM
- V
IN
< 1.0V
ON: V
COM
- V
IN
>= 3.5V
U
COM
5..24V
Disable
Dir
Step
C
E
A
C
C
E
A
C
C
E
A
C
GND
µC
A: Anode
C: Cathode
C: Collector
E: Emitter
+5V
Figure 4.1: Step, Direction and Disable Inputs
Examples:
V
OPTOFF
V
OPTON
V
STEP
= 0V
1.5V
4.0V
5V
undefined
20V
19.0V
16.5V
V
OPTON
V
OPTOFF
undefined
V
COM
= 5V
V
COM
= 20V
V
STEP
= 0V
