Rockwell-automation 1769-HSC Compact High Speed Counter Module Manual de usuario descargar pdf (Pagina 14)

14 Compact I/O High-speed Counter Module

Publication 1769-IN030B-EN-P - October 2010

Grounding Guidelines

•

This product is intended to be mounted to a well-grounded mounting surface, such as a

metal panel. Additional grounding connections from the module’s mounting tabs or

DIN rail (if used) are required only when the mounting surface is non-conductive and

cannot be grounded.

• Keep shield connection to ground as short as possible.

• Ground the shield drain wire at the 1769-HSC module’s input end only.

Refer to the Industrial Automation Wiring and Grounding Guidelines,

publication 1770-4.1

, for additional installation requirements

Terminal Block Guidelines

•

For optimum accuracy, limit overall cable impedance by keeping cable as short as

possible. Locate the module as close to input devices as the application permits.

• Tighten terminal screws with care. Excessive tightening can strip a screw.

Wire Diagrams

The following pages show wiring examples for a differential encoder, single-ended encoder,

and discrete device.

Figure 4 - Differential Encoder Wiring

(1) Refer to your encoder manual for proper cable type. The type of cable used should be twisted-pair, individually shielded

cable with a maximum length of 300 m (1000 ft).

A1(+)

A1(–)

B1(+)

B1(–)

Z1(+)

Z1(–)

GND

+VDC

COM

Cable

(1)

Power

Supply

Allen-Bradley

845H Series

Differential

Encoder

Shield/Housing

Connect only if housing is electronically

isolated from the motor and ground.

Shield

Module Inputs

Earth

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 31 32

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Rockwell-automation 1769-HSC Compact High Speed Counter Module Manual de usuario Pagina 14

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