4-14 Input / Output MN1941WEN
4.3.3 Stepper control outputs - models NXE100-16xxDx
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 5 MHz.
Each of the step (pulse) and direction signals from the NextMove e100 is driven by
DS26LS31 line drivers, providing RS422 differential outputs. It is recommended to use
separate shielded cables for the step outputs. The shield should be connected at one end
only.
The STEPPERDELAY keyword allows a 0 - 4.25 µs 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 5 MHz. Values less than 60 Hz will produce no
output - see the Mint help file.
The DS26LS31 drivers are static sensitive devices. Take appropriate ESD
precautions when handling the NextMove e100. When connecting the outputs to
single ended inputs as shown in Figures 17 and 18, do not connect the STEPx-
or DIRx- outputs to ground; leave them unconnected.
Figure 17: Stepper output - typical connection to an ABB MicroFlex
Figure 18: Stepper output - typical connection to a Baldor FlexDrive
II
,
Flex+Drive
II
or MintDrive
II
1
DS26LS31
3
6
‘X3’
‘X2’
10
11
DS26LS31
5
9
NextMove e100
Step
Connect shields at
one end only.
Step
output
Dir
output
GND
Twisted pairs
DGND
Dir
MicroFlex / servo amplifier
Step0+
Step0-
DIR0+
DIR0-
Shield
DGND
1
DS26LS31
3
6
‘X9’
‘X2’
1
6
DS26LS31
5
2
7
NextMove e100
Pulse+
Connect shields at
one end only.
Step
output
Dir
output
GND
Twisted pairs
Pulse
GND
Dir+
FlexDrive
II
/ servo amplifier
Step0+
Step0-
DIR0+
DIR0-
Shield
DGND
Dir
GND