Sierra 5391-02 - Manual (Page 6)

T12017-Sentry_LANServer_Users_Manual Page 6 of 59
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com
Tel: (408) 262-2299 Fax: (408) 262-2269 Toll_Free: 888-509-1970 email: [email protected]
Fig 1.2: Model 5391-01 LANServer with single Sentry Controller
For applications requiring the use of 2 to 4 Sentry controllers it is necessary to utilize RS-
485 communication from the controllers to the LANServer. Each Sentry will have a 4301-10
RS-232/RS-485 converter to provide the necessary RS-485 communication from the Sentry.
This RS-485 link will interface to the RS-485 port on the LANServer. The Ethernet output
from the LANServer can then interface directly to a computer (via a crossover cable) or to
the LAN, WAN, Internet or PC via a hub. (Figure 1.3)
Fig. 1.3: Model 5391-01 LANServer with 2-4 Sentry Controllers