2-3
Section
Optical Ring System (GI Cable) Wiring
34
Connect the upper node SL2 receive connector to next lower node SL1 send
connector and connect the upper node SL2 send connector to next lower node
SL1 receive connector.
←
Higher
Lower
→
Receive Send
Receive Send
The connector with the triangle facing up is the receive con-
nector, and with the triangle facing down is the send con-
nector. The color of the triangle indicates the upper node
Board and next lower node Board; Be sure to connect
triangles of the same color.
There is an ID mark on one end of each pair of Optical Fiber Cables. Use this
mark to identify the code.
Incorrect connections may result in a broken wire being incorrectly detected,
and may cause unexpected operation.
The nodes can be connected in any order, but connect the nodes in the order of
node addresses (i.e., node 1, node 2... node 62) as much as possible to reduce
the effect on the communications time if a wire breaks.
Also be sure to cover the unused connectors on the highest and lowest nodes in
the network with the provided Optical Connector Covers.
Optical Connector Cover
(Included)
←
Higher
Lower
→
Optical Connector Cover
(Included)
Refer to 2-1-1 Devices Required for Connection for details on available Optical
Fiber Cables. Refer to 2-2-3 Installing Connectors for details on connecting the
Optical Fiber Cables to the Controller Link Board.
Note
1. Always use the specified Optical Fiber Cables.
2. The code for the Optical Fiber Cables can be identified from cable marks
and color, but OMRON recommends adding tags to prevent incorrect con-
nection during installation.
3. The maximum distance between the nodes depends on the type of GI cable
(core diameter), as follows:
62.5/125
µ
m:
2 km maximum distance between nodes
50/125
µ
m:
1 km maximum distance between nodes
Connect all the nodes in a ring using GI Optical Fiber Cables.
Refer to the following diagram when making the connections.
Optical Ring System in
Token Ring Mode
