MICRONOR
automation components
8. Theory of Operation
A functional block diagram in shown in
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, showing the Encoder,
XMTR module, optical link, RCVR module and Remote Motor Drive encoder input connections.
The system can accommodate up to 4 channels (A/B/C/D) although most systems use just
A/B or A/B/Index for encoder feedback. In addition, 2 encoders can be served by one link if
only A/A’/B/B’ signals are used.
The Encoder connections to the XMTR module are electrically multiplexed and then
transmitted optically over a simplex fiber optic link. The optical input signal to the RCVR is
then converted back to the electrical domain and demultiplexed back into same 4-channel
encoder signals. The RCVR outputs are then connected to the encoder inputs of the Motor
Drive (or similar motion control system interface).
The end-to-end conversion and optical transmission process is completely transparent to the
Remote Motor Drive. The MR361 system simply extends the reach of the Encoder using fiber
optic transmission techniques.
Figure 8. Theory of Operation of MR361 Fiber Optic Encoder Link System
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