System Specifications
76 7705 SAR-M Chassis Installation Guide
CBN and IBN Grounding Requirements
The 7705 SAR-M supports both Common Bonding Networks (CBN) and Isolated Bonding
Networks (IBN) for systems using a DC power source. The battery terminals (labeled
+Batt A, –Batt A, +Batt B, and –Batt B on the chassis) are floating inputs relative to digital
or chassis ground within the chassis. For systems using an AC power source, only CBN is
supported and battery terminals labeled +Batt A and +Batt B on the chassis must always tie
to the earth ground.
For information on grounding the chassis and connecting the AC or DC supply, refer to
Chassis Ground Wiring, Wiring and Connecting AC Power, and Wiring and Connecting DC
Power.
Power and Cabling Requirements
Warning:
• In an IBN installation, the chassis ground terminal must be connected to ground at the
building ground point in the IBN zone.
• In a CBN installation, if you use the 7705 SAR-M chassis ground stud (located on the
right-hand side mounting bracket) to connect the chassis ground terminal(s) to the
frame ground on the rack, then you must use a second nut on the stud to secure the
attachment. The first nut is used to secure the building ground point wire to the chassis
ground stud.
Danger:
• Only electrical service personnel should perform wiring and cabling to the system.
• Power cable(s) must meet local electrical code requirements.
• All power to the equipment rack or cabinet should be disconnected before the
installation.
• An external circuit breaker or fuse must be located conveniently close to the equipment.
This is intended as the disconnect device.
• When removing DC power cables from the system, first disconnect the power from the
source and then disconnect the cables from the 7705 SAR-M.
To Next Page
Loading...
