Vertiv Liebert AC8 - Connecting Common Alarm Outputs; EIA422 Liebert Sitescan Web Connector; Communications Connections

3.4 Connecting Common Alarm Outputs
The common alarm relay, found in the top right corner of the Liebert AC8, permits the user to connect
auxiliary notification equipment, such as lights, horns and sirens, to the Liebert AC8. To determine the
proper wire size, see Wiring and Connections on page17.
There are two connectors for the common alarm output.
However, the connectors are not individual relay outputs. The
connectors should be treated as a double-pole, double-throw
(DPDT) relay.
The common alarm relay is energized whenever an alarm
occurs.
To connect an output:
1. Turn OFF electrical power to the Liebert AC8.
2. If necessary, remove a conduit knockout to permit
wire entry into the Liebert AC8 enclosure.
3. Bring the wire(s) into the Liebert AC8 enclosure
through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the stripped
end of the wire into the terminal block.
5. Tighten the screw until it holds the wire snugly.
3.5 EIA422 Liebert SiteScan Web
™
Connector
The Liebert AC8 will interface with Liebert’s SiteScan Web enterprise monitoring
system. Liebert SiteScan can be used to monitor analog and digital equipment
from a host computer and also to perform some configuration.
To connect the Liebert SiteScan host computer to the Liebert AC8:
1. Turn OFF electrical power to the Liebert AC8.
2. If necessary, remove a conduit knockout to permit wire entry into the
Liebert AC8 enclosure.
3. Bring the wire(s) into the Liebert AC8 enclosure through a conduit
knockout or access slot.
4. Loosen the appropriate screw and slip the stripped end of the wire into
the terminal block.
5. Tighten the screw until it holds the wire snugly.
3.6 Communications Connections
The Liebert AC8’s Service Terminal Interface offers full configuration and monitoring capability via the
RS232 port and the phone line connector (see Connecting to the Service Terminal Interface on page111).
The phone line connector is also used for pager notifications and service phone number options.
Vertiv | Liebert® AC8 User Manual | 27