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Mounting Your 1394
SERCOS interface System
Allen-Bradley PLCs
Bonding Multiple Subpanels
Bonding multiple subpanels creates a common low impedance exit
path for the high frequency energy inside the cabinet. Subpanels that
are not bonded together may not share a common low impedance
path. This difference in impedance may affect networks and other
devices that span multiple panels. Refer to Figure 1.5 for
recommended bonding practices.
Figure 1.5
Bonding Multiple Subpanels
Recommended:
Bond the top and bottom of each subpanel to the cabinet
using 25.4 mm (1.0 in.) by 6.35 mm (0.25 in.) wire braid
The procedures in this section assume you have prepared your panel
and understand how to bond your system. To mount your 1394
SERCOS interface system:
1. Install the top mounting fasteners on the subpanel for the system
module and all axis modules. The heads of the fasteners should be
at least 0.25 in. from the panel. Make sure all fasteners are
properly bonded to the subpanel. Refer to the section Bonding
Your System for more information.
2. Hang the 1394 system module on the two fasteners on the left side
of the subpanel.
Installing Your 1394 SERCOS Interface System
Scrape the paint around each fastener to
maximize metal to-metal-contact.
1-9
Bonded cabinet
ground bus to
subpanel
Publication 1394-5.20 — July 2001
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