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3. SPECIFICATIONS
MELSEC-A
3.4.2
Relay repeater function
The relay repeater function is the function to use several connected
converters as a relay box for extending the distance between stations.
(1) When using the same type of converters
The number of units which can be connected when the same type
is used is shown below.
Example of system configuration: To extend the distance between stations
by 250m(820ft) using PTC-CNV (bidirectional)
P:Plastic fiber cable
cable
R:NET/MINI remote 110, NETIMINI remote terminal unit,
A2C 110, etc.
1
Master
unit
(2) When using different types
When using different types, the smallest number of connectable
units should be applied.
Example:
PTC-
CNV
(a) If there is PP-SI or PP-GI mixed
...
bidirectional: 4 units,
single-directional: 8 units
1
(b) If there are PTC-CNV, PTC-SI, PP-CNV, and PP-SI mixed
...
bidirect~onal: 8 units, single-directional: 16 units
R
PTC-
OOmNV
50m
PTC-
CNV
PTC-
CNV
1
OOm
P
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