Emerson Static Transfer Switch user manual Input Contact Isolator Board, Comms Board

Options

6.3Distribution 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.

6.4Input 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 static transfer switch’s alarm net- work. 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 pro- gram the alarm messages through this dialog box. See Configuring the Input Contact Isolator Settings on page 95 for instructions on configuring the connections.

See Figures 21 and 22 for the location of the ICI. See Figure 25 for wiring details.

6.5Comms Board

The Comms Board provides a communication interface to Liebert SiteScan™, 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 informa- tion, all monitoring parameters, and all active alarms.

The Comms Board is equipped with a modem interface for remote reporting of the present switch sta- tus 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 desig- nated 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.

6.6Liebert IntelliSlot® Web/485 Card With Adapter

A Liebert IntelliSlot Web/485 Card With Adapter (IS-WEB485ADPT) enables the Liebert STS2 to communicate to a network management system (NMS). The card provides the internal hardware and software to communicate, via SNMP, to any IP-based Ethernet network through an RJ-45 connector using Category 5 cabling.

The Liebert IS-WEB485ADPT provides redundant paths for communications that make it possible to connect to a Building Management System (BMS) using Modbus, while simultaneously communicat- ing to a NMS through SNMP. A terminal block provides the connection to Modbus.

See Figures 21 and 22 for the location of the Liebert IS-WEB485ADPT. See Figure 27 control wir- ing information.

If you have questions about the Liebert IS-WEB485ADPT, refer to the user guide, SL-52615, avail- able at Liebert’s Web site, www.liebert.com

15