Mitsubishi Electric MELSEC-A Series Manual page 121

3
REPLACEMENT OF MELSECNET (II) AND /B (REMOTE I/O NETWORK)
(2) Coaxial cable
(a) Overall distance
Type
3C-2V
5C-2V
*3 When the overall distance does not satisfy the MELSECNET/H specifications, either use an A6BR10/A6BR10-DC type
repeater unit in the network, or configure a separate network.
(b) Distance between stations
Type
3C-2V
5C-2V
*4 When the distance between stations does not satisfy the MELSECNET/H specifications, either use an A6BR10/A6BR10-
DC type repeater unit in the network.
Remarks
The following shows the extension method when a repeater unit for the A6BR10/A6BR10-DC type
MELSECNET/10 coaxial bus system is used. For details, refer to the Repeater Unit for the
MELSECNET/10 Coaxial Bus System type A6BR10/A6BR10-DC User's Manual (IB-66499).
(1) The distance between stations of 500m (5C-2V) and 300m (3C-2V) can be extended.
(2) Up to four repeater units can be used in a single network.
The overall distance can be extended to a maximum distance of 2.5 km.
CPU BR CPU
R
*5 It is necessary to add terminal resistor A6RCON-R75 (sold separately).
MELSECNET (II) module
(Coaxial loop)
10km
10km
MELSECNET (II) module
(Coaxial loop)
500m
500m
500m (5C-2V)
Max.
300m (3C-2V)
CPU BR
R
. . .
BR
QJ71BR11
R
. . .
R Terminal
resistor
BR
R
A6B
CPU BR
R10
R
A6B
R10
R
CPU
: Compatible,
MELSECNET/H module
(Coaxial bus)
300m
500m
: Compatible,
MELSECNET/H module
(Coaxial bus)
300m
500m
R
A6B
BR
CPU
R10
Max. 500m (5C-2V)
300m (3C-2V)
*5
R
A6B
CPU BR
R10
R R
A6B
R10
R
BR
Max. 2.5km
: Partial change required, × : Incompatible
Compat-
Precautions for replacement
ibility
*3
Refer to below.
: Partial change required, × : Incompatible
Compat-
Precautions for replacement
ibility
*4
Refer to below.
R
CPU BR
CPU BR
R
R
3
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