Westermo LRW-702-F2, Руководство пользователя

Страница: 18 / 24

18
6651-2271
Redundant Ring Configuration
Prepare the Fibre Optical Network
• One, and only one, of the LRW-702-F2 units must be configured as a ring focal point
by setting DIP-switch S2:3 to the ON position. (The ring focal point acts as a logical end
point in the optical fibre ring, thus forming a bus type of structure)
• Connect the fibre pairs between the units. Always connect CH 1 from one unit to CH
2 on the next unit as shown in the picture above.
• Connect the power supply to all units and verify that all fibre links become active. (CH
1 and CH 2 LEDs are on, FL L and FL R LEDs are off).
• Connect the LON devices to the corresponding LRW-702-F2 unit.
• The network is now up and running.
Note: In an LRW-702-F2 fibre optic network there will be some additional processing
delays that do not exist in an electrical bus. It is possible that the application must
be adjusted to accommodate these delays if using many LRW-702-F2 units in a large
network.
See page with “Calculating system delay” for more information on how to determine the
overall system delay time.