www.baldormotion.com
Backplanes 5-9
MN1928
5.2.8 Stepper axes outputs 0-1
Location
X9
Mating connector: Weidmüller Omnimate BL 3.5/12
Pin Name
Description
96-pin
connector
12 Shield
Shield connection
a32
11 DIR1+
Direction output 1+
b15
10 DIR1-
Direction output 1-
9 STEP1+
Step (pulse) output 1+
b14
8 STEP1-
Step (pulse) output 1-
7 DGND
Digital ground
a3
6 Shield
Shield connection
a32
5 DIR0+
Direction output 0+
a15
4 DIR0-
Direction output 0-
3 STEP0+
Step (pulse) output 0+
a14
2 STEP0-
Step (pulse) output 0-
1 DGND
Digital ground
a3
Stepper axes outputs 0-1 on the backplane are driven by DS26LS31 line drivers, providing
RS422 differential outputs. See also Figures 25 and 26.
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 25 and 26, do not connect the STEP
x
- or DIR
x
-
outputs to ground; leave them unconnected.
NextMove ES
STEP0-
DGND
Backplane
1
2
96
pin
connector
‘X9’
Step
Output
74AHCT244
GND
DS26LS31
STEP0+
3
ULN2003
Figure 23 - Stepper output - STEP0 output shown
1
12
CAUTION
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
Fax: (973) 335-1661 • www.servosystems.com