1
5
8
3
6
10
2
9
4
7
11
12
13
2
O/P
Main I/P
Parallel Port
UPS1
O/P
Main I/P
Parallel Port
UPS2
Pa
ral
lel
C
ab
le
Load
AC I/P
IP1
IP2
OP1
OP2
1
B
B
A
16
6 – Wiring
(continued)
6-8 AC Input/Output Wiring (Parallel UPS – Single Input)
Parallel Configuration Warnings:
The total input cable length must be equal to the total
•
output cable length in order to prevent unbalanced load
sharing between two UPS systems under reserve mode
(i.e. IP1 + OP1 = IP2 + OP2; deviation must be <10%).
Parallel configuration only supports 2 UPS systems (1+1
•
redundancy ). Do not attempt to link more than two UPS
systems via parallel configuration.
The UPS systems must have the same rating and capacity
•
for parallel configuration installation. Attempting to link
dissimilar UPS systems will damage the UPS systems
and create a serious risk of personal injury and property
damage.
Each UPS must have its parallel group set to 2 and a
•
different "Parallel ID" that indicates the UPS systems
are being run in parallel. (See
Section 9-5-5
for details.)
Follow the steps in
•
Section 6-7
, wiring the UPS systems as shown
in the diagram.
Connect the included parallel
•
configuration
cable
A
to the
parallel
configuration
port
B
of each UPS system.
1
2