Omron CQM1H-CLK21 - Manual (Page 104)

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Constructing Networks with Repeater Units Section 3-4
Long-distance Wiring: 2-stage Repeater Unit Connection
Not more than 2 Repeater Units (2 stages) must be passed for any node to
reach any other node
Partial Optical Conversion: 2-stage Repeater Unit Connection
Two Wire-to-Optical Repeater Units make up a single set counted as a single
stage. Therefore, not more than 4 Repeater Units (2 stages) must be passed
for any node to reach any other node.
Examples of Incorrect Repeater Unit Connections
More than 2 Stages of Repeater Units
The path from PLC A to PLC B travels via 3 Repeater Units (3 stages). This
kind of network is NOT allowed.
More than 2 Stages of Repeater Units
Stage 2
CS1W-RPT01
Repeater Unit
Stage 1 Stage 2
Optical
fiber cable CS1W-RPT02 or
CS1W-RPT03
Repeater Unit
PLC A
PLC B
CS1W-RPT01
Repeater Unit
CS1W-RPT01
Repeater Unit