Parallel Communication; Figure 65: Parallel Comm. Connections (See Table 15) - Gamatronic Centric 3X480 VAC Installation Manual

G E I L .
AMATRONIC LECTRONIC NDUSTRIES TD
9.1.2

Parallel communication

When two or more Centric units are operated in parallel, parallel communication must take place between
them in a "ring" arrangement. This is accomplished by the use of Gamatronic-provided cables with D25
connectors on each end. Parallel communication keeps the parallel units synchronized with each other, and
is used to pass commands and status information between units.
Each Centric UPS has two D25 parallel communication connection terminals.
Figure 65 below shows how to connect the parallel communication terminals for parallel operation of two
and three Centric 480 units. When connecting one UPS to the other, it does not matter which of the two
D25 terminals you use on each UPS.

Figure 65: Parallel comm. connections (see Table 15)

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Centric 3x480 Vac, Installation Guide, rel. 2.2