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16 APC Redundant Switch: Installation and Operation Manual

Operation

Emergency

Power Off

You can use a remotely operated Emergency Power Off (

EPO

)

switch to turn off the

UPS

and disconnect power to the

equipment load. When you turn off the

UPS

through the

Emergency Power Off system, it will turn off immediately

without switching to battery operation.

1. Use the

EPO

connector.

2. Use a normally-open contact to connect the +24 terminal

to the

terminal.

3. Wire the external blue four-pin female connector to the

emergency power off system.

Electrical

Hazard

Use only a licensed electrician to perform the

following procedure to connect the Redundant

Switch and its attached UPSs to your

Emergency Power Off system.

Caution

The

EPO

interface is a Safety Extra Low Voltage

(

SELV

) circuit. Connect it only to other

SELV

circuits.

The

EPO

interface monitors circuits that have no

determined voltage potential. Such closure

circuits may be provided by a switch or relay

properly isolated from the utility. To avoid

damage to the Redundant Switch, do not connect

the

EPO

interface to any circuit other than a

closure type circuit.

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APC SU043 Fiche technique Page 20

Commentaires sur ces manuels

Produits connexes et manuels pour Unités de distribution d'électricité (PDU) APC SU043