11-4 Fibre-Optic Network
General Description
Trio Motion Technology
Connection of Network
All the nodes have to be connected to form a ring. Single core fibre optic cable is
used terminated with Hewlett Packard “Versatile Link” connectors. The fibre
optic modules on the Motion Coordinator and membrane keypad are colour
coded as follows:
To form the ring the transmit of a node is connected to the receive of the next
node, i.e. grey/black to blue. The transmit of the final node is connected to the
receive of the first thus completing the ring.
The order in which nodes are connected is not critical but the performance of
the network can be affected by rearranging the order of the nodes. This is espe-
cially true if there are a large number of nodes in the network and a large
amount of data being passed between two nodes. If these two nodes are not
adjacent in the ring any nodes between them will be tied up re-transmitting mes-
sages and will not be able to transmit as priority is given to re-transmission of
messages. This can be a particular problem if one of the nodes re-transmitting is
a membrane keypad as this can cause poor response to key presses.
Fibre-optic cables
Trio can supply a fibre-optic connection kit (P570 Simplex Cable Kit) comprising a
length of fibre-optic cable, connectors and assembly components.
Grey or Black
Transmit te r
Blue
Receiver.
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