Rockwell-automation 1747-ACNR15 ControlNet Adapter Module User Manual Uživatelský manuál stáhnout pdf (Strana 103)

Publication 1747-UM003A-EN-P

Understanding Your SLC 500/1746 Control System B-11

This figure shows you how to run ground connections from the chassis to the

ground bus. Two acceptable grounding methods are shown; we recommend

using a ground bus because it reduces the electrical resistance at the

connection.

Master Control Relay

A hard-wired master control relay (supplied by user) provides a convenient

means for emergency shutdown. Since the master control relay allows the

placement of several Emergency-Stop switches in different locations, its

installation is important from a safety standpoint. Overtravel limit switches or

mushroom head push buttons are wired in series so that when any of them

opens, the master control relay is de-energized. This removes power to input

and output device circuits.

ATTENTION

Never alter safety circuits to defeat their function, since

serious injury and/or machine damage could result.

2 mm

(14 AWG)

2 mm

(14 AWG)

2 mm

(14 AWG)

5.2 mm

(10 AWG)

Preferred Grounding

Method

5.2 mm

(10 AWG)

Earth Ground

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Rockwell-automation 1747-ACNR15 ControlNet Adapter Module User Manual Uživatelský manuál Strana 103