Preparation For Ups Interface Wiring - Eaton 93PR Series Installation And Operation Manual

3.2.3.

Preparation for UPS interface wiring

External control communication lines shall be connected to the user interface terminal block in-
side the UPS.
The feedback contact of the contactor shall not be connected to the circuit relevant to the
main power supply, and the insulation of the feedback contact shall be strengthened.
When the installation is planned and prepared, please carefully read and understand the following
matters:
• All interface wiring shall be supplied by the customer.
• Internal interface wiring of Mini-slot terminals shall be carried out through the Mini-slot
communication slots.
• Between the external alarm input and the dry node, all the signal input or remote feature
requirements need a normal-open isolating contactor or switch with rated value of 24VDC,
20mA at minimum. All control lines, relays and switch contactors shall be provided by the
customer. Twisted-pair cables shall be provided for each external alarm input and dry node.
• The LAN and telephone access using Mini-slot card shall be provided by the facility planner
or customer.
• The remote EPO function can open all the contactors inside the UPS cabinet, and isolate
the power supply from the critical load. Local electrical regulations might require installing an
upstream tripping protection device for the UPS.
• The remote EPO switch must be an independent switch, and shall not be connected to other
circuits.
• In the case of normal-close (NC) remote EPO, it's necessary to place a jumper between Pin3
and Pin4 of CN10.
• The wire size of remote EPO shall be within 0.75–2.5 mm².
• The distance between the remote EPO and the UPS shall not exceed 150m.
• The external alarm relay needs to connect with a switch with a rated current of 5A, a rated
voltage of 30VAC (RMS)/30VDC.
• The wire size of the external alarm relay shall not be smaller than 0.75 mm².
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Eaton 93PR 15-80 kW UPS
Installation and Operation Manual
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