10
Network
Termination
Option
Terminator
and Service
Switch
Locations
The option of using termination on the
LonWorks card is provided. The option card
has a 105 ohm termination resistor built in which
is activated by the terminator switch. Use of
the terminator is optional, depending upon the
network configuration. If termination is provided
elsewhere in the network, the termination
function should be OFF. Terminator switch
position functions are provided in the table
below. The factory default setting is OFF.
OFF
1
2
Switch Position Functions
Free Topology LonWorks Control Card
No termination Net Term OFF Net Term OFF
Single termination Net Term ON Net Term OFF
Double termination Net Term ON Net Term ON
NOTE
Termination resistor selection
should be made prior to installing
option card. It is recommended to
use an external termination
resistor because switches will not
be viable after assembly.
