the UPS and MOB AUX contacts. Always confirm contact operation prior to
wiring.
5.7 UPS system interface wiring preparation
Control wiring for features and options should be connected at the user interface
terminal blocks located on top front of the UPS, behind the door.
Note: Do not connect relay contacts directly to the mains-related circuits.
Reinforced insulation to the mains is required.
When you are planning and performing the installation, make sure you
understand the following notes:
• All the interface wiring is provided by the operator.
• When installing internal interface wiring to MiniSlot terminals, route the wiring
through the internal opening in the MiniSlot 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 the common terminal. All control wiring and relay and switch
contacts are supplied by the operator. Use twisted-pair wires for each alarm
input and common.
• The signal inputs can be programmed to display the alarm's functional
name.
• LAN drops for use with MiniSlot cards are provided by facility planners or the
operator.
• The UPS Battery Aux and 24 VDC Shunt Trip signal wiring from the UPS
must be connected to the DC source disconnect device. See Figure
• Battery Aux and 24 VDC Shunt Trip wiring must be a minimum of 1.5 mm
2
.
• 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 that is not tied to any
other circuits.
• If the normally-closed (NC) Remote EPO contact is used, a jumper wire must
be connected between pins 3 and 4 on connector EPO.
• Remote EPO wiring should be a minimum of 0.75 mm
2
and a maximum of
2.5 mm
2
.
• The 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 must be a minimum of 0.75 mm
2
.
Eaton 91PS/93PS UPS 8–40 kW
User's and installation guide
©
Eaton Corporation plc 2018. All rights reserved.
Revision: 005
Document ID: P-164000493
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