Replace
Power supply module
Product name
CPU module
MELSECNET/H remote I/O station module
MELSECNET/H master station module
Main base unit (remote I/O station)
Main base unit (master station)
Existing module
Replacemant module
A62P
A2NCPUR21
A0J2R25
N/A
N/A
A35B
3
1
2
1
Terminating resistor for coaxial bus link (75 Ω)
N/A
Q62P (with 24 V DC)
Q01UCPU
QJ72BR15
QJ71BR11
Q33B
Q35B
A6RCON-R75
2
2
1
1
1
2
I/O module
A0J2-E56DR
2
QX41Y41P
2
-
-
-
1
Interface module
Product name
Programmable controller fixing frame set
Programmable controller connection cable
Model
Remarks
SC-A0JQIF56DR
SC-A0JQSEL-U1
SC-A0JQC03M
Cable length (0.35 m)
2
2
4
(when the stackable type is used)
Power supply
MELSECNET (Coaxial loop)
A2NCPUR21
I/O module
Empty
I/O module
Master station
A0J2R25
A0J2E56DR
X80 to X9F
YA0 to YB7
A0J2R25
A0J2E56DR
XC0 to XDF
YE0 to YF7
SC-A0JQIF56DR
Q62P
Q01U CPU
I/O module
I/O module
QJ71BR11
Q62P
QX41Y 41P
Empty
Empty
QJ72BR15
SC-A0JQSEL-U1
(1-level stackable type)
Q33B
Q35B
Coaxial bus
MELSECNET/H (Coaxial bus)
Q33B
SC-A0JQC03M (0.35 m I/O connection cable) x 4
Q62P
Empty
Empty
QJ72BR15
R
R
SC-A0JQIF56DR
SC-A0JQSEL-U1
(1-level stackable type)
I/O module
I/O module
I/O module
I/O module
• Using the A0J2 upgrade tool, A0J2R25(P25) remote I/O stations can be replaced with
MELSECNET/H remote I/O stations without modifying external wiring.
• By making the same network parameter settings as the current ones, program modifications can
be avoided.
Solution and Benefit
The following is an example of upgrading a MELSECNET network system consisting of only remote I/O stations
to a MELSECNET/H (remote I/O network) system using the A0J2 upgrade tool.
●
Instructions
(1) Replace the MELSECNET network system with MELSECNET/H remote I/O network system. The network
parameter settings remain the same, and it is not necessary to make changes to the program.
(2) Change the cable system from MELSECNET coaxial loop to MELSECNET/H coaxial bus. New wires are
not necessary because the existing coaxial loop cables can be used.
(1) System configuration example
●
Module selection example
(1) Programmable controller
(2) A0J2 upgrade tool
Current configuration
New configuration after replacement
Existing terminal block
Existing terminal block
Existing terminal block
Existing terminal block
• The overall distance of coaxial bus is 500 m (when using 5C2V). Use the following product to extend the
distance up to 2.5 km.
"Repeater Unit for the MELSECNET/10 Coaxial Bus System type A6BR10"
•
When upgrading an optical loop network system, use the "QJ71LP21-25 for the master station" and the
"QJ72LP25-25 for the remote I/O station" so that the optical loop can be maintained.
The distance between stations differs depending on the type of optical fiber cables used in the existing
system. Refer to "Q Corresponding MELSECNET/H Network System Reference (Remote I/O network)"
SH-080124 for details.
Tip
QX41Y 41P
2.4.2 Upgrade to MELSECNET/H (remote I/O network) system using A0J2 upgrade tool
69
2.4 Replace A0J2 with Q Series
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