Baldor NXE100-1608Dx, Installation Manual

Page: 30 / 114

www.baldormotion.com
4-14 Input / Output MN1941
4.3.4 Stepper control outputs - models NXE100-16xxSx
The stepper control outputs are available on connectors X2 and X3, as shown in section 4.1.1.
There are four sets of stepper motor control outputs, operating in the range 60 Hz to 500 kHz.
Each of the step (pulse) and direction signals from the NextMove
e 100 is driven by a ULN2803
open collector Darlington output device. The
STEPPERDELAY
keyword allows a 0 - 4.25 μ s delay
to be introduced between state changes of the step and direction outputs. The
FREQ
keyword
can be used to directly control the output frequency, between 60 Hz and 500 kHz. Values less
than 60 Hz will produce no output - see the Mint help file.
The ULN2003 drivers are static sensitive devices. Take appropriate ESD
precautions when handling the NextMove
e 100. A 5 V supply is provided on
connectors X2 and X3 for powering external circuits, as shown in Figure 19. The
same 5 V supply is also present on connectors X5, X6 and X7 for powering
encoders. Ensure that the total combined current demand of all 5 V outputs does not
exceed 600 mA. In situations where induced noise is affecting a step or direction
output, it may be necessary to connect a 5 k
Ω or 10 k Ω pull-up resistor between the
output and the 5 V supply (pin 4).
NextMove e 100
STEP0
ULN2803
Step
Output
74AHCT244
GND
3
Stepper drive opto-isolated inputs
Optocoupler
reference
Step clock
input
+5 V
4 +5 V
DIR0
ULN2803
Direction
Output
74AHCT244
GND
5
CW/CCW
direction
input
REL NC
7
Enable input
‘X2’
‘X12’
+5 V
REL COM
1
DGND
8
Enable
Figure 19 - Connections to a typical stepper drive (e.g. Baldor DSM series)
NOTICE