Output Interface Example (Sinking Output); Figure 2.3.5: Sinking Output Example - Intelligent Motion Systems MDrive17Plus Hardware Reference Manual

NOTE: On
the Standard
MDrivePlus, when
configured as outputs, the
I/O set is sinking ONLY!
The Plus 2 Models add the
functionality of I/O Power,
which enables the user to
use all the outputs, both
Standard and Enhanced, as
Sinking or Sourcing.
2-18

Output Interface Example (Sinking Output)

The following circuit example shows a load connected to an I/O point that will be configured as a sinking
output.
Internal
pull-up
voltage
Sinking Output Equivalent Circuit

Figure 2.3.5: Sinking Output Example

Code Sample
For the code sample, the load will be an LED. The I/O point will be configured such that the LED will be
unlit while the velocity is changing. Use the switch set-up from the previous input, modified to be sinking,
example to soft stop the motor.
S1=5,0,0 'set IO point 1 to be a Soft Stop input, active when LOW,
'sinking.
S1=20,0,0 'set IO point 2 to be a Velocity Changing output, active when
'LOW
SL 2000000 'enter this to slew the motor at 200000 µsteps/sec
While the motor is accelerating the LED will be dark, but will light up when the motor reaches a constant
velocity. When the Soft Stop switch is depressed the motor will begin to decelerate, the LED will go dark again
while velocity is changing.
MDrivePlus
always
65-160 µA
off
24.9k ohms
switched
Diode recommended for
inductive loads
LOAD
IOx
+
load current, sinking
up to
24 V
GND
Sinking Output
MDI Hardware Manual Revision R050406