APC 3000 - Emergency Power Off (EPO) Interface Connection Guide

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4.0 Installation
4.11 Emergency Power Off (EPO) interface
The UPS may be switched off by a remotely operated Emergency Power Off control.
Such a configuration is common in computer rooms and laboratories where, for safety
reasons, power to the loads must be disconnected. The EPO interface is a six-position
modular jack with an offset latch. Connection to a remotely located EPO switch may
be accomplished as shown below.
Caution: The EPO interface is a Safety Extra Low Voltage (SELV) circuit and may be
connected only to other SELV circuits.
Attention: L'interface de mise hors tension d'urgence est un circuit de sécurité à très
basse tension qui ne peut être connecté qu'à d'autres circuits de sécurité à très basse
tension.
Beachte: Die Schnittstelle für die Notabschaltung ist eine Schutzkleinspannungs-
Schaltung (SELV = safety extra low voltage circuit) und darf nur an andere
Kleinspannungs-Schaltungen angeschlossen werden.
Precaución: La interfaz de Parada de Emergencia es un circuito de seguridad de
extra bajo voltaje, y puede conectarse únicamente a otros circuitos de seguridad de
extra bajo voltaje.
Caution: The EPO interface is designed to monitor circuits that have no determined
voltage potential. Such "closure circuits may be provided by a switch or relay properly
isolated from the mains. Connection of the EPO interface to any circuit other than a
closure type circuit may cause damage to the Electronics Unit.
pin 6
offset latch
jack
offset latch plug
Amp p/n 555237 (flat cable)
Amp p/n 555238 (round cable)
or equivalent
pin 1
5
N
O
1, 2, 3, 4 or 6
Normally Open
EPO Switch