Installation manual

Publication 1394-IN002B-EN-P — February 2004

Connecting Your 1394 SERCOS Interface System 3-9

Grounding Your 1394

SERCOS Interface System

We recommend that all equipment and components of a machine or

process system have a common earth ground point connected to their

chassis. A grounded system provides a safety ground path for short

circuit protection. Grounding your modules and panels minimizes

shock hazards to personnel and damage to equipment caused by

short circuits, transient overvoltages, and accidental connection of

energized conductors to the equipment chassis. For CE grounding

requirements, refer to Chapter 1.

Grounding Your System to the Subpanel

This section provides examples for connecting the chassis ground to

your 1394 and the subpanel. The 1394 system module provides a

grounding bar as a common point of chassis ground for the system

and axis modules, as shown in Figure 3.6.

Figure 3.6

1394 Ground Wire Connections

The system module single point bond bar wires to the bonded system

ground bus on the sub-panel. Refer to Figure 3.7 for grounding

configuration examples.

IMPORTANT

To improve the bond between your 1394 and the

subpanel, construct your subpanel out of zinc plated

(paint-free) steel.

ATTENTION

The National Electrical Code contains grounding

requirements, conventions, and definitions. Follow

all applicable local codes and regulations to safely

ground your system. Refer to Appendix B for the

1394 interconnect diagrams.

PE1

To bonded cabinet ground bus

or power distribution ground

System module

single point bond bar

1394 Front View