Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 61)

Publication 1760-UM002B-EN-P - March 2005
Installation 2-27
Connecting High-Speed Counters and Frequency Generators
High-speed counter signals on the Pico GFX-70 can be counted correctly on
inputs I1 to I4 independently of the cycle time.
Figure 2.29 High-speed counter, frequency generator
Connecting Incremental Encoders
Inputs I1, I2 and I3, I4 on the Pico GFX-70 can each be used for the
high-speed counting of an incremental encoder independently of the cycle
time. The incremental encoder must generate two 24V dc square wave signals
with a 90° phase shift between them.
Figure 2.30 Connecting incremental encoders
L01–
> 1 A
L01+
I1 I3 I4 I7 I8 I9 I10
L02+
I2 I5 I6 I11 I12 +24V 0V 0V
L01–
> 1 A
L01+
I1 I3 I4 I7 I8 I9 I10
L02+
A B
I2 I5 I6 I11 I12 +24V 0V 0V