Outlet Grouping; Cable Length - LEGRAND Server Technology PRO1 User Manual

Star Linking Technology
Server Technology's Sentry DC product line provides Star Linking technology that supports the optional
linking of up to three expansion (link) units per one master unit, allowing a single IP address for multiple
cabinets.
Note: The Star Linking feature is available with PRO1 Sentry Switched DC PDUs and the PRO1/PRO2 AC
PDUs.
The following illustrations (using PRO1/PRO2 PDUs in this example) show multi-linking between separate
units and within the cabinet:
Multi-Linked PDUs Multi-Linking View in the Equipment Cabinet
Redundant Power and Communication
The Star Linking arrangement is fault tolerant, with redundant power coming from the first link unit.
The arrangement also offers significant cost reduction as the link units do not require a network card.
Another significant advantage of Star Linking technology is that if power in the master unit is lost,
communication will continue with the other link units, which is a major improvement over a daisy-chain
linking configuration.

Outlet Grouping

The multi-link arrangement allows outlet grouping across the master and three link units.

Cable Length

The maximum cable length allowed from link unit to master unit is 21-feet (6.4 meters).
Sentry Switched DC PDU
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