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6.2
Input Contact Isolator Board
The Input Contact Isolator Board (ICI) provides an STS2 module interface for up to eight external
user alarm or message inputs to be routed through the static transfer switch'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 pro-
gram the alarm messages through this dialog box. See Configuring the Input Contact Isolator
Settings on page 90 for instructions on configuring the connections.
See Figure 21 on page 39 and Figure 22 on page 40 for the location of the ICI. See Figure 25 on
page 43 for wiring details.
6.3
Comms Board
The Comms Board provides a communication interface to Liebert SiteScan, site monitoring prod-
uct, and/or an external or internal modem. SiteLink-12 or SiteLink-4 is required for SiteScan to
communicate with the 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 87 for details.
See Figure 21 on page 39 and Figure 22 on page 40 for the location of the Comms Board.
See Figure 26 on page 44 for information on the control wiring.
6.4
Internal Modem
The Internal Modem is an option that must be ordered separately. An external modem is available
from third party sources. The Internal Modem is capable of dialing out from the STS2 or accepting
incoming calls and connecting to a remote terminal or computer. Using an ASCII Query and
Answer format the modem connection can be used to view system status and alarms. The modem
provides all information normally available on the LCD display of the STS2. No control functions
are available via the modem, such as making transfers, selecting a preferred source, or changing
configurations.
The modem can also be configured to dial out two different telephone numbers (any combination of
modem or pager numbers).
The connection to this modem is through a standard RJ-11 port.
See Figure 21 on page 39 and Figure 22 on page 40 for the location of the internal modem. See
Figure 27 on page 45 for more information on the internal modem.
Programming the modem is performed through the touch screen display, see Configuring the
Modem on page 88 for details.
The modem commands are shown in Table 10 on page 71.
Options
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