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6 – Wiring
(continued)
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6-9 AC Input/Output Wiring: Parallel Configuration – 4x MUS (Multiple Unit System)
Parallel Configuration – MUS Warnings:
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• The total cable length for each UPS must be within 10% of each of the other parallel-configured UPS in order to prevent
unbalanced load sharing between the individual UPS. (IP1 + OP1 = IP2 + OP2 = IP3 + OP3 = IP4 + OP4, minimum/maximum
deviation must be < 10%).
• Parallel configurations are supported for 2, 3, or 4 UPS units only. Do not attempt to configure more than 4 UPS systems via
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parallel configuration.
• Each UPS system to be parallel configured for either N+1 redundancy or capacity, must have the same rating, kVA capacity, and
system and power module level firmware version (see
inhibited or may cause damage to the UPS systems and create a risk of personal injury and property damage.
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• Each UPS must have its parallel group set to 2 and a different "Parallel ID" that indicates the UPS systems are operating in
parallel (see
Section 10-5-5
•
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Follow the steps in
Section
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Each UPS is shipped with (1) parallel configuration cable included. Connect each UPS parallel communication port(s) as shown and select
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the correct position of the parallel port dip switches (either both ON (down) or both OFF (up) as shown in the diagram
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DASHED LINES INDICATE USER-SUPPLIED
PARTS AND CABLES.
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12-212-93-3141.indb 16
All manuals and user guides at all-guides.com
Section
for more details).
6-7, wiring the UPS systems as shown in the diagram
10-6). Attempting to configure dissimilar UPS systems may be
.
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12/28/2012 11:17:26 AM
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