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NETWORK TOPOLOGY
the same potential. If this cannot be guaranteed,
the network connection between building(s)
should be a fiber optic cable with a LINC Fiber
Optic device fitted in each building to interface
onto the ISN network.
• The LINC Guardian should be used where it is
expected multiple alarms will be transmitted via
a modem to a remote Facility Manager for
Windows™ or multiple destinations. It acknowl-
edges receipt of any alarm to a transmitting ISN
controller and can store up to 20 alarms in each
of the 8 standard ISN Alarm Classes.
• All node numbers connected to the LAN Port 1
of a Universal LINC485 configured as a repeater
12
must be lower than the node address of the
repeater. All node numbers connected to the
LAN Port 2 of a Universal LINC485 configured
as a repeater must be higher than the node
address of the repeater.
• Each ISN controller must have the node switch
set to a unique address number between 1 and 98
per subnetwork. The node switches are used for
filtering messages at a Universal LINC485
configured as a repeater which also must have a
unique node number. The node switches on a
Universal LINC485 configured as a router set
the subnetwork address and must be between 1
and 98, with the main network automatically
being network address 99. Communications
between ISN devices on the same network or
subnetwork(s) should use network 0 (zero) as the
network address.
FORM 450.20-N20 (702)
YORK INTERNATIONAL
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