2.5.3 Serial-to-Fiber Conversion: Loop Topology
Figure 2.5.4 Serial-to-fiber conversion in example optical loop topology
Figure 2.5.4 illustrates the optical loop topology that utilizes the RMC20 repeat mode function. The
repeat function will optically re-transmit any data received on the optical receiver, in addition to any
connected serial devices. As a result, any data transmitted from the master, will be re-transmitted
optically to all the slaves. This mode of operation requires that the master device tolerate receiving
echoes of transmitted data since any transmissions will be received once again via the optical ring.
This topology can be used for RS232, RS485, or RS422 multi-drop networks. In all cases, all
slaves have the repeat function (DIP position 4) ON, while the master is configured with the repeat
function OFF. This topology can allow for the mixture of RS232, RS485, and RS422 devices,
operating on the same baud rate, on a single optical serial network because the RMC20 utilizes a
common optical signaling protocol for all serial standards.
16
©
2006 RuggedCom Inc. All rights reserved
Rev100
