Omron SYSMAC CS1W-CLK13 Operation Manual page 89

Optical Wiring
Optical Ring System
(Token-ring Mode) without
Duplex Operation
Note
Optical Ring System
(Token-ring Mode) with
Duplex Operation
66
3. The maximum distance between nodes depends on the type of GI cable
(core diameter) that is being used.
62.5/125 µ m cable: Max. distance between nodes = 2 km
50/125 µ m cable: Max. distance between nodes = 1 km
4. Duplex operation of Communications Units is not possible in token-bus
mode.
5. Online replacement is possible in CS1D Systems but if token-bus mode is
used there is a possibility of the network splitting.
All of the nodes in the network are connected in a ring with GI Optical Fiber
Cable. The cables must be connected as shown in the following diagrams.
Higher SL2 "Receive"
Higher SL2 "Transmit"
An identifying label is printed on one of the cables in each pair, so that the
cables can be told apart. If the Units are connected incorrectly, the situation
can be misinterpreted as a disconnection and unpredictable operation may
result.
Although there is no fixed order in which the nodes must be connected, in
order to minimize the effect on communications time in the event of a discon-
nection, it is recommended that they be connected in node address order
(node 1 → node 2... → node 62 → node 1) whenever possible.
← Higher
Receive
Receive
Tran-
smit
Transmit
See 1-2-6 Devices Required for Connection for details on available GI Optical
Fiber Cables.
1. Always use the specified Optical Fiber Cables.
2. The maximum distance between nodes depends on the type of GI cable
(core diameter) that is being used.
62.5/125 µ m cable: Max. distance between nodes = 2 km
50/125 µ m cable: Max. distance between nodes = 1 km
All of the nodes in the network (including standby Units) are connected in a
ring with GI Optical Fiber Cable. The cables must be connected as shown in
the following diagrams.
Higher SL2 "Receive"
Higher SL2 "Transmit"
An identifying label is printed on one of the cables in each pair, so that the
cables can be told apart. If the Units are connected incorrectly, the situation
can be misinterpreted as a disconnection and unpredictable operation may
result.
Lower SL1 "Receive"
Lower SL1 "Transmit"
Lower →
Receive
Receive
Transmit
Transmit
Lower SL1 "Receive"
Lower SL1 "Transmit"
Section 3-3
Receive
Receive
Transmit
Tran-
smit