Eaton 93PR 25(75) User And Installation Manual Download

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25-75 kW

User's and Installation Guide

4.4 Installing Interface Connections

93PR UPS contains a total of five (5) signal input connectors for customers which can be used for
giving remote control commands to the UPS. Customer interface connector CN5 can be used forthese pur-
poses. Each input is a dry relay contact input and requires two wire signaling. None of the inputs are
pre-programmed but need to be separately programmed by qualified service personnel.

When using an external battery system (either the original 93PR battery cabinet or a customer sourced
battery cabinet/rack), external signaling wiring is recommended to be connected.

One (1) general alarm relay output is also on the front panel. This output is either normally open (NO) or
normally closed (NC). Polarity selection is made with wiring connection. By default, the general alarm relay
activates when a system alarm is active, that is, any ALARM condition in the system is active. Alternatively, it
can be activated with any particular event but this must be programmed separately by qualified service
personnel. The alarm relay is designed for signal level (ELV or SELV) voltages only, not for utility use. For
higher signaling circuit voltage requirements, please use Industrial Relay Adapter in Mini-slot.

4.4.1 Installing Customer Input Signals Interface

These inputs are located behind the UPS door, on top section of the UPS. See Figure 5-1: Communication
interfaces for connector locations. Tie points with strain relief for communication cables are located on the
right and left side of the cable conduit.

Signal inputs can be configured to different functions. Normally these functions are either informative
(for example “On Generator”) or functional (for example remote “Go to bypass” command).

4.4.2 External Battery Breaker Wiring Interface

When using the original battery cabinet from the EATON, the battery breaker interface wiring is provided with
the cabinet. Connecting it requires only routing the wires from the cabinet to the bottom section of the UPS.

When using third party battery system, the breaker must be equipped with auxiliary signal and should have a
24 V shunt trip for remote opening of the breaker, when needed.

Wire entry for battery breaker signal wiring is located on the top of the UPS cabinet. The wire can
pass through the top of UPS cabinet and locked to external battery breaker control terminal at
the front of the module (see Figure 5-1).

Pin 1 and 2 of the terminal are for signal connection of battery

breaker shunt trip control, and Pin 3 and 4 are for Signal connection of battery breaker aux contact detection.

4.4.3 Relay Output Interface Connections

The general alarm relay is a dry relay signal output. The relay can be used for informing the operators about
UPS alarm conditions, for example through a building management system. By default, the relay is configured
to activate when the UPS general alarm is active, that is, any event having ALARM status is active. The relay
can also be configured to activate by some other event but this needs to be done by authorized service.

Relay signal wiring can be installed only through the signal cabling canal, from back to front, on the top
section of the UPS.