Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 7)

Chapter
2
2Ć1
Introducing the Servo Positioning Assembly
This chapter gives you an overview of the servo positioning assembly, its
applications, functions and features.
A servo positioning assembly controls the motion of one of your axes. It
consists of:
one Servo Controller Module (cat. no.1771-M3)
one Servo Expander Module (cat. no. 1771-ES) that includes two Field
Wiring Arms (cat. no. 1771-WB)
With a basic servo positioning assembly (plus a servo drive, motor,
tachometer, and encoder) you can control the motion of one user-supplied
machine axis. You can add a second 1771-ES expander to control a
second axis and a third 1771-ES expander to control a third axis. A 1771
I/O chassis can accommodate one 1771-M3 controller and a maximum of
three 1771-ES expanders.
The 1771-M3 controller requires one I/O chassis slot; it requires no
wiring (figure 2.1a). You can install it at any I/O slot in the I/O chassis.
The 1771-ES expander requires a pair of slots that make up an I/O module
group (Figure 2.1b). You make all wiring connections to the 1771-ES
expander.
Chapter Objectives
What is the Servo Positioning
Assembly?