Ups System Interface Wiring Preparation - Eaton 93PR User And Installation Manual

3.2.3.

UPS System Interface Wiring Preparation

Control wiring for features and options should be connected at the customer interface terminal blocks located
on top front of the UPS, behind the door.
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the mains is
required.
Read and understand the following notes while planning and performing the installation:
• All interface wiring is to be provided by the customer.
• When installing internal interface wiring to Mini-slot terminals, route the wiring through the internal
opening in the Mini-slot communication bay.
• All signal inputs or remote features require an isolated normally-open contact or switch (rated at 24 Vdc,
20 mA minimum) connected between the alarm input and common terminal. All control wiring and relay
and switch contacts are customer-supplied. Use twisted-pair wires for each alarm input and common.
• The signal inputs can be programmed to display the alarm functional name.
• LAN and telephone drops for use with Mini-slot cards must be provided by facility planners or the
customer.
• The UPS Battery Aux and 48 Vdc Shunt release signal wiring from the UPS to the DC source disconnect
device is optional.
• Battery Aux and 48 Vdc Shunt release wiring should be a minimum of 1.5 mm².
• The Remote EPO feature opens all switchgear in the UPS cabinet and isolates power from your critical
load. Local electrical codes may also require tripping upstream protective devices to the UPS.
• The Remote EPO switch must be a dedicated switch not tied to any other circuits.
• A jumper wire must be connected between pins 1 and 2 on connector EPO, if the normallyclosed (NC)
remote EPO contact is used.
• Remote EPO wiring should be a minimum of 0.75 mm² and a maximum of 2.5 mm².
• The maximum distance between the Remote EPO and the UPS cannot exceed 150 meters.
• Alarm relay contacts have a maximum current rating of 5 A and a switched voltage rating of 30 Vac
(RMS) and 30 Vdc.
• Alarm relay wiring should be a minimum of 0.75 mm².
DANGER
Eaton 93PR 500 kW UPS
User's and Installation Guide 29