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5.3.9 Stepper axes outputs 2-3
Stepper axes outputs 2-3 on the backplane are driven by DS26LS31 line drivers, providing
RS422 differential outputs.
The DS26LS31 drivers are static sensitive devices. Take appropriate ESD
precautions when handling the backplane. When connecting the outputs to single
ended inputs as shown in Figures 42 and 43, do not connect the STEPx- or DIRx-
CAUTION
outputs to ground; leave them unconnected.
NextMove ES
Step
Output
GND
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
5-30 Backplanes
Location X10
Mating connector: Weidmüller Omnimate BL 3.5/12
12
Pin Name
12 Shield
11 DIR3+
10 DIR3-
9 STEP3+
8 STEP3-
1
7 DGND
6 Shield
5 DIR2+
4 DIR2-
3 STEP2+
2 STEP2-
1 DGND
ULN2003
74AHCT244
Figure 41 - Stepper output - STEP2 output shown
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
Fax: (973) 335-1661 • www.servosystems.com
Description
Shield connection
Direction output 3+
Direction output 3-
Step (pulse) output 3+
Step (pulse) output 3-
Digital ground
Shield connection
Direction output 2+
Direction output 2-
Step (pulse) output 2+
Step (pulse) output 2-
Digital ground
Backplane
DS26LS31
96
pin
connector
www.baldormotion.com
NextMove ES
96-pin
connector
a32
a23
b23
a3
a32
c15
c14
a3
'X10'
2
STEP2-
3
STEP2+
1
DGND
MN1928
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