Figure 11. Typical Network Layout With Routers And Repeaters - York Universal LINC485 Installation Manual

INSTALLATION
The Base Network may contain a combination of up to 92 subnetworks or
nodes, providing Repeaters are used between segments of 32 RS485 drivers.
Universal
LINC485
Repeater
Node 1
Universal
LINC485
Subnetwork
Universal
LINC485
Repeater
Figure 9. Typical Network Layout with Routers and Repeaters
• The node switch sets the address of the subnet-
work. This can be any unique number between 1
and 92.
• The base network is always network 99 when
referenced from a subnetwork.
When operating as a router, the Universal LINC485
only passes data (packets) through to the main
network if a subnetwork number is included in the
destination address. When no subnetwork address is
included, it is assumed the device is within the
subnetwork.
When the Universal LINC485 is operating as a
repeater, a different set of parameters apply:
• The node address of all devices on the input side
(LAN PORT 1) must be lower than devices on
the output side (LAN PORT 2).
24
Router
Subnetwork
Each segment may contain up to 32 nodes.
Each subnetwork may contain 3 segments.
Node 30
Universal
LINC485
Node 31
Router
Nodes on the incoming side of a repeater must be lower than the repeater node.
Nodes on the outgoing side of a repeater must be higher than the repeater node.
Subnetwork
Node 32 Node 61
Universal
LINC485
Node 62
Repeater
• The node address setting is ignored when
operating as a repeater at 19.2 kbaud.
The node addresses must be considered when design-
ing the application. Failure to allow for the addition
of repeaters and node addresses could require that the
application be reprogrammed to include these.
Communication Rate
The Communication Rate sets the Universal
LINC485 to communicate at the network transfer
speed. This can be either 19.2 or 50 kbaud. Set
FORM 450.20-N20 (702)
Node 63 Node 91
Repeater
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