G
AMATRONIC
E
LECTRONIC
I
NDUSTRIES
L
TD
.
Centric Installation Guide, rel. 2.8
39
5.2
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 40, Figure 41,
or Figure 42, depending on the number of UPSs).
1.
The Centric units should be located near to one another. They must be connected to one another in a
ring configuration using the parallel communication cables supplied in the cable kit.
Table 7: Cable sets for parallel configurations
D
ESCRIPTION OF CABLE SET
C
ATALOG
N
O
.
Set of cables for 2 parallel units 101-CN-SKD-P
Set of cables for 3 parallel units 101-CN-SKD-P-1
Set of cables for 4 parallel units 101-CN-SKD-P-2
The supplied cables allow for a maximum of about 5 meters between UPSs. 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.
In each of the Centric units that are to be connected in parallel, the jumper labeled “J5 master” must
be removed from circuit board PC3001, a long, narrow, “L”-shaped board located at the left rear of the
Centric. (See Figure 34 and Figure 35.)
