UPS IST7 Series (60K-200K)
User Manual
2 Overview
29
2.4.3 Parallel/BCS System Accessory
Parallel/BCS system accessory are for parallel/BCS ports connection between cabinets.
When multi UPSs in parallel, connect the parallel port of each UPS by parallel wire. N UPSs require
N parallel wires to ensure there are at least two parallel wires for a UPS, which will improve parallel
reliability.
The synchronous BSC output dual bus control is used in a dual bus system to synchronize the output
frequency and phase of each system in a dual bus system to ensure that the two buses can switch to
each other.
The parallel wires are configured.
Parallel system connection
Two UPSs
UPS1
Bypass unit
UPS2
Bypass unit
Figure2-21
Parallel system connection(Two UPSs)
Multiple UPSs
UPS1
UPS2
UPSn
……
Bypass unit
Bypass unit
Bypass unit
Figure2-22
Parallel system connection(Multiple UPSs)
Wiring color in Figure2-21 and Figure2-22 just for display only, it cannot stands for the actual wire color,
for specific color please see the actual wire.
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