Chapter 3 Parallel UPS Installation And Commissioning 37
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ITA 16kVA And 20kVA UPS User Manual
UPS 1
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PE PE
UPS 2
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PE PE
UPS 3
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PE PE
UPS 4
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DB9 male port
DB9 female port
LBS cable
DB9 male port
DB9 female port
Figure 3-10 LBS cable connection
3.6.5 Setting Parameters Of Double Bus System
Take the double bus system formed by the 1 + 1 parallel system for example, set ‘System Configuration’ to ‘Parallel’,
‘Parallel requisite units’ to ‘1’, ‘Parallel Redundant Units’ to ‘1’. For the master system, set ‘LBS Function’ to
‘MASTER’. For the slave system, set ‘LBS Function’ to ‘SLAVE’. Ensure that the setting for ‘3 Phase Output or 1
Phase Output’ of each single UPS in the double bus system is same, as shown in Figure 3-11.
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