Auxiliary encoder inputs, Auxiliary encoder input types, Auxiliary encoder input circuit – Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR User Manual

Page 83

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Publication 1398-5.0 – October 1998

Interfaces

6-19

Auxiliary Encoder Inputs

The ULTRA 200 Series drive may be electronically geared by a
remote signal. Electronic gearing may be driven by any of the
following three signals:

A master incremental encoder that generates quadrature encoder
signals

Step and direction signals, such as those created by indexers for
step motors

CW (Step Up)/CCW (Step Down) signals, typically used with
stepper indexers.

Figure 6.21

Auxiliary Encoder Input Types

Intro

A
B

STEP
DIR

CW
CCW

Note: The use of differential signals is strongly recommended. Single-
ended signals are susceptible to noise, which may cause intermittent or
continuous errors.

To improve noise immunity, terminate cable shields at both ends of the
cable. Connect shields to the backshell of the connector with a complete
circumferential (360°) termination. The cable connector should then
connect to chassis ground (not signal ground.)

Figure 6.22

Auxiliary Encoder Input Circuit

Intro

-

+

26LS33

AX(-)

1K

220pF

AX

220pF

AX(+)

1K

5K

+5VDC

10K

+5VDC

10K

5VCOM

Drive

J1

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