Options
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6.3 Distribution Cabinet With I-Line Panelboard—100-600A Units Only
A distribution cabinet with a Square D I-Line panelboard offers space to plug in up to 10 three-pole
branch circuit breakers (100A-250A). The panelboard is rated at 600A with an overall short-circuit
rating of 100,000 AIC.
The full-height cabinet mounts on either the right or left side of the Liebert STS2 and is fully enclosed
with a keylock door and an accent cover that permits access to the panelboard without exposing other
portions of the Liebert STS2.
6.4 Input Contact Isolator Board
The Input Contact Isolator Board (ICI) provides an Liebert STS2 module interface for up to eight
external user alarm or message inputs to be routed through the Liebert STS2’s alarm network. The
eight contacts are normally open dry contacts. When a contact closes, an event is triggered.
The Input Contact Isolator options are configured through the Input Contact Isolator dialog box,
which is accessed from the Comm Option dialog box on the touch screen display. You also can
program the alarm messages through this dialog box. See Configuring the Input Contact Isolator
Settings on page 96 for instructions on configuring the connections.
See Figures 21 and 22 for the location of the ICI. See Figure25 for wiring details.
6.5 Comms Board
The Comms Board provides a communication interface to Liebert SiteScan, a site monitoring product
and/or an external modem. Liebert SiteLink™-12 or Liebert SiteLink-4 is required for Liebert
SiteScan to communicate with the Liebert STS2.
The Comms Board is equipped with an RS-422 communication port for communication to a Liebert
SiteScan monitoring system using a 2-wire twisted pair for reliable communication up to 1000 meters
(3281 feet). Information available from the RS-422 port includes the present switch status
information, all monitoring parameters, and all active alarms.
The Comms Board is equipped with a modem interface for remote reporting of the present switch
status information, alarm history information, and the history of status screens that are triggered
upon a major alarm event. The monitoring system software also supports an auto-dial feature that
allows the system to automatically dial programmed phone numbers by way of the modem to report
designated alarm conditions.
Programming the Comms Board is performed through the touch screen display. See Comm
Options on page 93 for details.
See Figures 21 and 22 for the location of the Comms Board.
See Figure 26 for information on the control wiring.
6.6 Liebert IntelliSlot® SNMP/Web/Modbus 485 Card
A Liebert IntelliSlot SNMP/Web/Modbus 485 card enables the Liebert STS2 to communicate to a
network management system (NMS). The card provides the internal hardware and software to
communicate, via SNMP/Web (HTTP), to any IP-based Ethernet network through an RJ-45 connector
using Category 5 cabling.
The Liebert SNMP/Web/Modbus 485 card provides redundant paths for communications that make it
possible to connect to a Building Management System (BMS) using Modbus, while simultaneously
communicating to a NMS through SNMP/Web (HTTP). A terminal block provides the connection to
Modbus.
See Figures 21 and 22 for the location of the Liebert SNMP/Web/Modbus 485 card. See Figure 27
control wiring information.
If you have questions about the Liebert SNMP/Web/Modbus 485 card, refer to the user guide,
SL-52615, available at the Liebert Web site, www.liebert.com