Rockwell Automation 1746-HSTP1 Stepper Controller Module/ User Manual - Manual (Page 24)

Publication 999-121 - December 1999
Installation and Wiring 2-7
Figure 2.6 Encoder input equivalent circuit
Typical Encoder Timing
Diagram A typical encoder timing diagram is shown below. For actual
connections, consult your encoder manufacturer's timing diagram. For
all encoder types, if the direction (phasing) of the feedback is
backwards, correct this condition by reversing the channel A and
channel B connections.
HI
LO
210
210
1 Cycle
90’
Channel A
B
A
Z
B
Z
Optional
STEP 3
Channel A is high at least part
of marker interval. Connect to
CH A. HI" of termination point
STEP 1
High marker interval.
Connect to + encoder
marker.
STEP 2
B is high for at least
part of marker interval.
Connect to CH B. HI"
CCW rotation viewing shaft
Wire CH B, CH A, and CH Z to CH B LO, CH A LO, and CH Z LO,
respectively on the terminal block.
Hi
Lo