EasyManuals Logo
Home>Eaton>UPS>9155 N

Eaton 9155 N User Manual

Eaton 9155 N
99 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #49 background image
42 8-10 kVA, 50/60 Hz (1-phase input) &
8-15 kVA, 50/60 Hz (3-phase input)
P-164000341
User's Guide Revision 1
7.3 External control connections
The UPS has an input/output interface for direct communication with your computer system. It is
located behind the front bezel of the UPS unit. The cables connected to these terminals should be
connected to cable clips.
Input and output terminals have a functional isolation from terminal to terminal. They are connected to
the chassis through individual 1 MΩ resistors.
Figure 7-3: External control cable connections to the UPS
NOTE
Pay attention to proper polarity if one is using a semiconductor switch type. A relay or other
mechanical control is a preferred method.
7.3.1 Emergency Power Off (EPO)
EPO is used to shut down the UPS from a distance. This feature is intended for an emergency power
down. There are two different modes of operation that can be used: normally closed (NC) contacts at
X52 and normally open (NO) contacts at X12. Pins 1 and 2 at the remote shut down terminal X52 are
as factory default closed. When the contacts at X52 are opened, the UPS output will be immediately
shut down and the battery breaker (F1) opened. The Emergency Power Off circuit is powered by the
UPS unit's internal auxiliary power. Do not apply power from external source to terminals X52 or X12.
NOTE
EPO does not necessarily disconnect supply to load when unit is on internal or external
bypass. Guaranteed disconnection of bypass supply has to be through a separate disconnect
switch located in the supplying switchgear cabinet.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Eaton 9155 N and is the answer not in the manual?

Eaton 9155 N Specifications

General IconGeneral
BrandEaton
Model9155 N
CategoryUPS
LanguageEnglish

Related product manuals