7 – Wiring (continued)
1
7-8 AC Input/Output Wiring (Parallel UPS – Single Input)
Parallel Redundancy 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 redundancy only supports 2 UPS systems (1+1 redundancy ). Do not attempt to link more than two UPS systems via parallel redundancy.
•The UPS systems must have the same rating and capacity for parallel redundancy installation. Attempting to link dissimilar UPS systems will damage the UPS systems and create a serious risk of personal injury and property damage.
•1 Follow the steps in Section
•2 Connect the included parallel redundancy cable A to the parallel redundancy port B of each UPS system.
AC I/P |
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| 2 |
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| O/P | OP1 |
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Main I/P | UPS1 |
| 3 | |
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IP1 |
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| Parallel Port | Parallel |
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| Load | |
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| Cable | |
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| O/P | 4 | |
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| OP2 | ||
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Main I/P | UPS2 |
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IP2 |
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Parallel Port 
1 |
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| 5 |
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| B | 6 |
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| B | A | 7 |
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2 |
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