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9.2
Instructions for parallel configuration
In a parallel UPS configuration, the length of the bypass input cable must be the same on
all the UPSs, and the bypass input cables must be at least 10 meters long.
When reading this section, refer also to the appropriate connection diagram: Figure 71, Figure 72,
or Figure 73 (for configurations using neutral line) or Figure 74, Figure 75, or Figure 76 (for
configurations NOT using a Neutral line), depending on the number of UPSs to be connected in parallel.
1.
The Centric units should be located near to one another. They must be connected to one another in a
ring configuration using the supplied 25-pin parallel communication cables. These cables must be
housed in appropriate conduits.
Table 15: Cable sets for parallel communication between UPSs
The supplied parallel communication cables are either 5 or 10 meters long, depending on your order..
Keep this in mind when positioning the UPSs.
2.
In a parallel configuration, the length of the bypass input cable must be the same on all of the
UPSs, and the bypass input cables must be at least 10 meters in length.
3.
Connect the UPSs in a ring configuration using two 25-pin parallel communication terminals on
each UPS.
Figure 68: Parallel communication cable with 25-pin connectors
4.
Verify that each UPS's output circuit breaker is in the OFF position (CB5 in the connection
diagrams - Figure 71, Figure 72, Figure 73).
5.
Turn on one of the systems. This system will become the "master" system. Wait until the startup
procedure is complete – you will see the main menu screen. It should read "UPS ON, Normal mode",
and there should be no alarms present. (If there are active alarms, resolve any problems before
continuing.)
66
G
E
AMATRONIC
LECTRONIC
D
ESCRIPTION
25 pins, 5 meter cable
25 pins, 10 meter cable
I
L
.
NDUSTRIES
TD
G
AMATRONIC
Q
UANTITY
CATALOG NO
1
GPIN25350
1
GPIN25410
Centric 3x480 Vac, Installation Guide, rel. 2.2
.
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