Apc REMOTE POWER-OFF DEVICE AP9830 User Manual download pdf (Page 9)

6 Remote Power-Off Device — Installation and Quick Start

Contact Closure Setup with Multiple UPSs

To eliminate the need for multiple contact closures at the

remote switch, do one of the following:

• Use an applied voltage switch.

• Use a cascading setup.

Warning

To connect multiple UPSs to a system that uses

contact closures to turn off the UPSs, you must

provide a separate set of contact closures for

each UPS. Do not set up multiple UPSs in a

parallel configuration to a single set of contacts.

A parallel configuration can introduce

intersystem ground noise or generate false EPO

signals at the integrated EPO interface of a

UPS or at the Remote Power-Off Device.

See “Cascade multiple RPOs (serial setup)”

on page 20.

Note

You can include only one APC Matrix-UPS

in a cascading configuration, and you must

place it at the end of the series of UPSs.

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Apc REMOTE POWER-OFF DEVICE AP9830 User Manual Page 9