Mitsubishi Electric Melsec A Series - Page 121

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REPLACEMENT OF MELSECNET (II) AND /B (REMOTE I/O NETWORK)
3
(2) Coaxial cable
(a) Overall distance
: Compatible, : Partial change required, × : Incompatible
*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
: Compatible, : Partial change required, × : Incompatible
*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.
*5
The overall distance can be extended to a maximum distance of 2.5 km.
*5 It is necessary to add terminal resistor A6RCON-R75 (sold separately).
Type
MELSECNET (II) module
(Coaxial loop)
MELSECNET/H module
(Coaxial bus)
Compat-
ibility
Precautions for replacement
3C-2V 10km 300m
Refer to
*3
below.
5C-2V 10km 500m
Type
MELSECNET (II) module
(Coaxial loop)
MELSECNET/H module
(Coaxial bus)
Compat-
ibility
Precautions for replacement
3C-2V 500m 300m
Refer to
*4
below.
5C-2V 500m 500m
BR
. . .
. . .
BR
CPU
R
R
R
A6B
R10
R
BR
CPU
R
Max.
500m (5C-2V)
300m (3C-2V)
Max.
500m (5C-2V)
300m (3C-2V)
Terminal
resistor
QJ71BR11
BRCPU
BRCPU
BRCPU
R
Max. 2.5km
R
A6B
R10
R
BRCPU
R
A6B
R10
R
R
A6B
R10
R
R
A6B
R10
R
BRCPU
BRCPU
R
BRCPU