LEGRAND NUMERIC HPi 33 EVO User Manual page 15

3.9.3 Requirement for the parallel system
A group of paralleled UPS behaves as one large UPS system but with the advantage of presenting
higher reliability. In order to assure that all UPS are equally utilized and comply with relevant wiring rules,
please follow the requirements below:
1) All UPS must be of the same rating and be connected to the same bypass source.
2) The outputs of all the UPS must be connected to a common output bus.
3) The length and specification of power cables including the bypass input cables and the UPS output cables
should be the same. This facilitates load sharing when operating in bypass mode.
3.10 Computer access
Connect one end of a USB cable to the computer, the other end to the USB port on the UPS.
•
Open the software Muser4000, click "system" button.
•
A window of "Software Parameter Setting" comes out as below, COM choose according to the UPS, baud rate
•
choose 9600, protocol choose "HIP", then save this setting.
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