Specifications

Application and Configuration
16
3.5 Redundant SiteScan Web Servers
3.5.1 Target Application
In a typical application, a customer wants to monitor two facilities using two servers that manage
both locations, providing server redundancy. If a server goes off-line, the other still collects alarms
from both locations. The main features are:
• Data centers are in two separate buildings.
• Customer wants to have both sites managed by redundant servers.
• If one server goes down, the customer must have access to both sites.
• Each location manages both sites.
3.5.2 Description
Install two copies of the SiteScan Web server software, one in each location. Only one set of custom-
ized data files is created and is then loaded at both sites. Set up the servers to manage each site.
Both SiteGate-E modules will send alarm information to both servers. The customer will be able to
navigate and monitor both locations’ event alarms. Since the gateway modules can send trend infor-
mation to only one server, the system has been configured for each gateway to send trend data to its
local server.
3.5.3 Bill of Materials
Figure 5 Redundant SiteScan Web servers
Table 6 Bill of materials: Redundant SiteScan Web servers
Qty. Mktg. P/N Description
2 SSWEB SiteScan Web Software
2 SITEGATE-E 32-bit Ethernet-ready gateway module
2 SITELINK-12 SiteScan interface module to 12 Liebert units
2 ARC156-KIT PROT485, DIAG485 and terminating resistors with enclosure
Note: The bill of materials does not include LGS startup part numbers. Most LGS startup part numbers
are added automatically when ordering.
10.1.1.1
10.1.1.2 11.1.1.3
11.1.1.4
City Location A
Network - Ethernet - Fiber
City Location B
Network - Ethernet - Fiber
Legend
Alarm events
Trend data
Notifications
(E-mail, page, etc.)