Rockwell-automation 1769-HSC Compact High Speed Counter Module Manual de usuario descargar pdf (Pagina 54)

54 Rockwell Automation Publication 1769-UM006E-EN-P - July 2013

Chapter 3 Installation and Wiring

Field Wiring Connections

Consider these system wiring guidelines when wiring your system.

General Guidelines

• Make sure the system is properly grounded.

• Input and output channels are isolated from the 1769 Compact bus. Input

channels are isolated from one another; output channels are not.

• Shielded cable is required for high-speed input signals A, B, and Z. Use

individually shielded, twisted-pair cable for lengths up to 300 m (1000 ft).

• Group this module and other low voltage DC modules away from AC I/O

or high voltage DC modules.

• Route field wiring away from any other wiring and as far as possible from

sources of electrical noise, such as motors, transformers, contactors, and

AC devices.

• Routing field wiring in a grounded conduit can reduce electrical noise.

• If field wiring must cross AC or power cables, make sure that they cross at

right angles.

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.

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, input end only.

Refer to the Industrial Automation Wiring and Grounding Guidelines,

publication 1770-4.1, for additional installation requirements.

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 169 170

Sin comentarios

Rockwell-automation 1769-HSC Compact High Speed Counter Module Manual de usuario Pagina 54