Mitsubishi Electric MELSEC-I/OLINK User manual

Transition from MELSEC-I/OLINK to
AnyWire DB A20 Handbook
Feb. 2017 Edition

A- 1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using products introduced in this handbook, please read relevant manuals and replacement
handbooks carefully and pay full attention to safety to handle the product correctly.
The precautions given in this handbook are concerned with products introduced in this handbook only. For
the safety precautions of the programmable controller system, refer to the user's manual for the CPU
module used.
In this handbook, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this handbook and then keep the handbook in a safe place for future
reference.
WARNING
CAUTION
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.

A- 2
When the QJ51AW12D2 is used
[Design Precautions]
[Design Precautions]
WARNING
●An AnyWire DB A20 system has no control function for ensuring safety.
●When connecting a peripheral with the CPU module or a personal computer with an intelligent
function module to modify data of a running programmable controller, configure an interlock circuit in
the sequence program to ensure that the entire system will always operate safely. For other forms of
control (such as program modification or operating status change) of a running programmable
controller, read the relevant manuals carefully and ensure that the operation is safe before
proceeding. Especially, when a remote programmable controller is controlled by an external device,
immediate action cannot be taken if a problem occurs in the programmable controller due to a
communication failure. To prevent this, configure an interlock circuit in the sequence program, and
determine corrective actions to be taken between the external device and CPU module in case of a
communication failure.
●Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an output signal from the CPU module to each
module. Doing so may cause malfunction of the programmable controller system.
CAUTION
●Although an AnyWire DB A20 system features high noise immunity, keep a distance of 100mm or
more between the transmission cables or I/O cables and the high-voltage cables or power cables.
Failure to do so may cause malfunction.
●Configure safety circuits, such as an emergency stop circuit and interlock circuit, external to the
AnyWire DB A20 system.

A- 3
[Installation Precautions]
WARNING
●Use the programmable controller in an environment that meets the general specifications in the user's
manual for the CPU module used.
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the
product.
●To mount the module, while pressing the module mounting lever located in the lower part of the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place.
Incorrect interconnection may cause malfunction, failure, or drop of the module.
When using the programmable controller in an environment of frequent vibrations, fix the module with
a screw.
Tighten the screw within the specified torque range.
Undertightening can cause drop of the screw, short circuit, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
●Shut off the external power supply (all phases) used in the system before mounting or removing a
module.
Failure to do so may result in damage to the product.
●Do not directly touch any conductive parts and electronic components of the module.
Doing so can cause malfunction or failure of the module.

A- 4
[Wiring Precautions]
CAUTION
●Tighten the terminal block screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
●Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.
●A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
●Incorrect wiring may damage modules and external devices.
Adjust a cable length and a module position to prevent disconnection of a connector type terminal
block or a cable.
●Do not solder stranded wires of a cable when connecting them to the terminal block. Doing so may
cause poor contact.
●The power supply voltage of remote slave modules may be insufficient due to a voltage drop in the
power supply line. Connect an external power supply so that the voltage of remote slave modules is
ensured.
●Do not apply the 24VDC power before wiring the entire AnyWire DB A20 system. If the power is
applied before wiring, normal data transmission is not guaranteed.
●Use 24VDC stabilized power supplies for devices in the AnyWire DB A20 system.
●Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Failure to do so may result in malfunction due to noise.
●Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
●When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable connected to the terminal block, loosen the terminal screw.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.

A- 5
[Startup and Maintenance Precautions]
[Startup and Maintenance Precautions]
[Disposal Precautions]
WARNING
●Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
●Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the terminal screws or module fixing screws.
Failure to do so may result in electric shock.
Undertightening the terminal screws can cause short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
CAUTION
●Do not disassemble or modify the modules. Doing so may cause failure, malfunction, injury, or a fire.
●Shut off the external power supply (all phases) used in the system before mounting or removing a
module.
Failure to do so may cause the module to fail or malfunction.
●After the first use of the product, do not mount/remove the module to/from the base unit, and the
terminal block to/from the module more than 50 times (IEC 61131-2 compliant) respectively.
Exceeding the limit of 50 times may cause malfunction.
●Before handling the module, touch a grounded metal object to discharge the static electricity from the
human body.
Failure to do so may cause the module to fail or malfunction.
CAUTION
●When disposing of this product, treat it as industrial waste.

A- 6
When the LJ51AW12D2 is used
[Design Precautions]
[Design Precautions]
WARNING
●An AnyWire DB A20 system has no control function for ensuring safety.
●When connecting a peripheral with the CPU module or a personal computer with an intelligent
function module to modify data of a running programmable controller, configure an interlock circuit in
the sequence program to ensure that the entire system will always operate safely. For other forms of
control (such as program modification or operating status change) of a running programmable
controller, read the relevant manuals carefully and ensure that the operation is safe before
proceeding. Especially, when a remote programmable controller is controlled by an external device,
immediate action cannot be taken if a problem occurs in the programmable controller due to a
communication failure. To prevent this, configure an interlock circuit in the sequence program, and
determine corrective actions to be taken between the external device and CPU module in case of a
communication failure.
●Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an output signal from the CPU module to each
module. Doing so may cause malfunction of the programmable controller system.
CAUTION
●Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Keep a distance of 100mm or more between them. Failure to do so may result in malfunction due to
noise.
●Configure safety circuits, such as an emergency stop circuit and interlock circuit, external to the
AnyWire DB A20 system.

A- 7
[Installation Precautions]
[Installation Precautions]
WARNING
●Shut off the external power supply (all phases) used in the system before mounting or removing the
module.
Failure to do so may result in electric shock or cause the module to fail or malfunction.
CAUTION
●Use the programmable controller in an environment that meets the general specifications in the Safety
Guidelines provided with the CPU module or head module. Failure to do so may result in electric
shock, fire, malfunction, or damage to or deterioration of the product.
●To interconnect modules, engage the respective connectors and securely lock the module joint levers.
Incorrect interconnection may cause malfunction, failure, or drop of the module.
●Tighten the screws within the specified torque range. Undertightening can cause drop of the screw,
short circuit, or malfunction. Overtightening can damage the screw and/or module, resulting in drop,
short circuit, or malfunction.
●Do not directly touch any conductive parts and electronic components of the module.
Doing so can cause malfunction or failure of the module.

A- 8
[Wiring Precautions]
CAUTION
●Tighten the terminal block screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
●Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.
●A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
●Incorrect wiring may damage modules and external devices.
Adjust a cable length and a module position to prevent disconnection of a connector type terminal
block or a cable.
●Do not solder stranded wires of a cable when connecting them to the terminal block. Doing so may
cause poor contact.
●The power supply voltage of remote slave modules may be insufficient due to a voltage drop in the
power supply line. Connect an external power supply so that the voltage of remote slave modules is
ensured.
●Do not apply the 24VDC power before wiring the entire AnyWire DB A20 system. If the power is
applied before wiring, normal data transmission is not guaranteed.
●Use 24VDC stabilized power supplies for devices in the AnyWire DB A20 system.
●Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Failure to do so may result in malfunction due to noise.
●Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
●When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable connected to the terminal block, loosen the terminal screw.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.

A- 9
[Startup and Maintenance Precautions]
[Startup and Maintenance Precautions]
[Disposal Precautions]
WARNING
●Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
●Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the terminal block screws. Failure to do so may result in electric shock.
CAUTION
●Do not disassemble or modify the module.
Doing so may cause failure, malfunction, injury, or a fire.
●Shut off the external power supply (all phases) used in the system before mounting or removing a
module.
Failure to do so may cause the module to fail or malfunction.
●Tighten the terminal block screws within the specified torque range. Undertightening can cause drop
of the component or wire, short circuit, or malfunction. Overtightening can damage the screw and/or
module, resulting in drop, short circuit, or malfunction.
●After the first use of the product (module, display unit, and terminal block), the number of connections/
disconnections is limited to 50 times (in accordance with IEC 61131-2).
Exceeding the limit may cause malfunction.
●Before handling the module, touch a conducting object such as a grounded metal to discharge the
static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.
CAUTION
●When disposing of this product, treat it as industrial waste.

A- 10
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major
or serious accident; and
ii) where the backup and fail-safe function are systematically or automatically provided outside of
the PRODUCT for the case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general
industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT
LIMITED TO ANY AND ALL RESPONSIBILITY OR LIABILITY BASED ON CONTRACT,
WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR
LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE OPERATED OR
USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS,
OR WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY
MANUALS, TECHNICAL BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
• Nuclear Power Plants and any other power plants operated by Power companies, and/or any
other cases in which the public could be affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases in which establishment of
a special quality assurance system is required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as
Elevator and Escalator, Incineration and Fuel devices, Vehicles, Manned transportation,
Equipment for Recreation and Amusement, and Safety devices, handling of Nuclear or
Hazardous Materials or Chemicals, Mining and Drilling, and/or other applications where there is a
significant risk of injury to the public or property.
Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the
PRODUCT in one or more of the Prohibited Applications, provided that the usage of the PRODUCT
is limited only for the specific applications agreed to by Mitsubishi and provided further that no
special quality assurance or fail-safe, redundant or other safety features which exceed the general
specifications of the PRODUCTs are required. For details, please contact the Mitsubishi
representative in your region.

A- 11
REVISIONS
* The handbook number is given on the bottom left of the back cover.
Japanese Handbook Version L08249-D
© 2013 MITSUBISHI ELECTRIC CORPORATION
Print Date * Handbook Number Revision
Jan. 2013 L(NA)08263ENG-A First edition
May 2015 L(NA)08263ENG-B Change
Chapter 7 to Appendix 1, Appendix1 to Appendix 2
Partial correction
SAFETY PRECAUTIONS, GENERIC TERMS AND ABBREVIATIONS
Feb. 2016 L(NA)08263ENG-C Partial correction
Cover, WARRANTY
Feb. 2017 L(NA)08263ENG-D Addition of modules to be replaced
LJ51AW12D2
Partial correction
SAFETY PRECAUTIONS, GENERIC TERMS AND ABBREVIATIONS, Section
1.3, 2.1, 2.2.1, 3.2, 4.1, 5.1.2, Appendix 2.1
This handbook confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses.
Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this handbook.

A- 12
SAFETY PRECAUTIONS ................................................................................................................................A - 1
CONDITIONS OF USE FOR THE PRODUCT ...............................................................................................A - 10
REVISIONS ....................................................................................................................................................A - 11
CONTENTS ...................................................................................................................................................A - 12
GENERIC TERMS AND ABBREVIATIONS ...................................................................................................A - 15
CHAPTER 1 INTRODUCTION 1 - 1 to 1 - 2
1.1 Replacement with AnyWire DB A20 ................................................................................................ 1 - 1
1.2 Precautions for Replacement .......................................................................................................... 1 - 2
1.3 Features of AnyWire DB A20 ........................................................................................................... 1 - 2
CHAPTER 2 PERFORMANCE SPECIFICATIONS COMPARISONS 2 - 1 to 2 - 4
2.1 Performance Specifications Comparison of MELSEC-I/OLINK and AnyWire DB A20 .................... 2 - 1
2.2 Wiring for AnyWire DB A20 ............................................................................................................. 2 - 3
2.2.1 Transmission distance .............................................................................................................. 2 - 3
2.2.2 Terminator connection .............................................................................................................. 2 - 3
2.2.3 Branch of transmission lines (transmission distance: 1km) ...................................................... 2 - 4
CHAPTER 3 FUNCTIONAL COMPARISONS 3 - 1 to 3 - 2
3.1 Functional Comparisons of MELSEC-I/OLINK and AnyWire DB A20 ............................................. 3 - 1
3.2 Master Module Switch Comparisons ............................................................................................... 3 - 2
CHAPTER 4 REPLACING THE MASTER MODULE 4 - 1 to 4 - 2
4.1 List of Alternative Master Module Models ........................................................................................ 4 - 1
CHAPTER 5 PROGRAMS COMPARISONS 5 - 1 to 5 - 6
5.1 I/O Signals ....................................................................................................................................... 5 - 1
5.1.1 MELSEC-I/OLINK ..................................................................................................................... 5 - 1
5.1.2 AnyWire DB A20 ....................................................................................................................... 5 - 3
CHAPTER 6 REPLACING THE I/O MODULES 6 - 1 to 6 - 40
6.1 List of Alternative I/O Module Models .............................................................................................. 6 - 1
6.2 I/O Module Specifications Comparisons .......................................................................................... 6 - 6
6.2.1 Input module specifications comparisons ................................................................................. 6 - 6
6.2.2 Output module specifications .................................................................................................. 6 - 12
6.2.3 I/O module specifications comparisons .................................................................................. 6 - 18
6.3 Applicable Crimping Terminal ........................................................................................................ 6 - 40
CONTENTS

A- 13
APPENDICES APPX- 1 to APPX - 3
Appendix 1 External Dimensions .......................................................................................................APPX - 1
Appendix 2 Relevant Manuals ...........................................................................................................APPX - 1
Appendix 2.1 Replacement handbooks .........................................................................................APPX - 1
Appendix 2.2 MELSEC-I/OLINK ....................................................................................................APPX - 2
Appendix 2.3 AnyWire DB A20 .....................................................................................................APPX - 2

A- 14
●For the products shown in handbooks for transition, catalogues, and transition examples, refer to the
manuals for the relevant products and check the detailed specifications, precautions for use, and
restrictions before replacement.
For the products manufactured by Mitsubishi Electric Engineering Co., Ltd., Mitsubishi Electric System
& Service Co., Ltd., and other companies, refer to the catalogue for each product and check the
detailed specifications, precautions for use, and restrictions before use.
The manuals and catalogues for our products, products manufactured by Mitsubishi Electric
Engineering Co., Ltd., and Mitsubishi Electric System & Service Co., Ltd. are shown in Appendix of
each handbook for transition.
●Products shown in this handbook are subject to change without notice.

A- 15
GENERIC TERMS AND ABBREVIATIONS
Unless otherwise specified, this handbook uses the following generic terms and abbreviations.
Generic term/abbreviation Description
Series
A series The abbreviation for large types of Mitsubishi Electric MELSEC-A series programmable
controllers
AnS series The abbreviation for compact types of Mitsubishi Electric MELSEC-A series
programmable controllers
A/AnS series A generic term for A series and AnS series
QnA series The abbreviation for large types of Mitsubishi Electric MELSEC-QnA series
programmable controllers
QnAS series The abbreviation for compact types of Mitsubishi Electric MELSEC-QnA series
programmable controllers
QnA/QnAS series A generic term for QnA series and QnAS series
A/AnS/QnA/QnAS series A generic term for A series, AnS series, QnA series, and QnAS series
Q series The abbreviation for Mitsubishi Electric MELSEC-Q series programmable controllers
L series The abbreviation for Mitsubishi Electric MELSEC-L series programmable controllers
CPU module type
CPU module A generic term for A series, AnS series, QnA series, QnAS series, Q series, and L
series CPU modules
Process CPU A generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU, and Q25PHCPU
Redundant CPU A generic term for the Q12PRHCPU and Q25PRHCPU
Universal model QCPU
A generic term for the Q00U(J)CPU, Q01UCPU, Q02UCPU, Q03UD(E)CPU,
Q03UDVCPU, Q04UD(E)HCPU, Q04UDVCPU, Q06UD(E)HCPU, Q06UDVCPU,
Q10UD(E)HCPU, Q13UD(E)HCPU, Q13UDVCPU, Q20UD(E)HCPU,
Q26UD(E)HCPU, and Q26UDVCPU
LCPU A generic term for the L02SCPU, L02SCPU-P, L02CPU, L02CPU-P, L06CPU,
L06CPU-P, L26CPU, L26CPU-P, L26CPU-BT, and L26CPU-PBT
CPU module model
ACPU A generic term for MELSEC-A series CPU modules
AnSCPU A generic term for MELSEC-AnS series CPU modules
AnNCPU
A generic term for the A1NCPU, A1NCPUP21/R21, A1NCPUP21-S3, A2NCPU,
A2NCPU-S1, A2NCPUP21/R21, A2NCPUP21/R21-S1, A2NCPUP21-S3(S4),
A3NCPU, A3NCPUP21/R21, and A3NCPUP21-S3
AnACPU A generic term for the A2ACPU, A2ACPU-S1, A3ACPU, A2ACPUP21/R21,
A2ACPUP21/R21-S1, and A3ACPUP21/R21
AnUCPU A generic term for the A2UCPU, A2UCPU-S1, A3UCPU, and A4UCPU
AnUS(H)CPU A generic term for the A2USCPU, A2USCPU-S1, and A2USHCPU-S1
A/AnSCPU A generic term for MELSEC-A series and -AnS series CPU modules
AnN/AnACPU A generic term for the AnNCPU and AnACPU
AnN/AnA/AnSCPU A generic term for the AnNCPU, AnACPU, and AnSCPU
QnACPU A generic term for MELSEC-QnA series CPU modules
QnASCPU A generic term for MELSEC-QnAS series CPU modules
QnA/QnASCPU A generic term for MELSEC-QnA series and -QnAS series CPU modules
A/AnS/QnA/QnASCPU A generic term for MELSEC-A series, -AnS series, -QnA series, and -QnAS series CPU
modules
QCPU A generic term for MELSEC-Q series CPU modules
LCPU A generic term for MELSEC-L series CPU modules
Module model related to AnyWire DB A20
Master module A genetic term for the QJ51AW12D2 and LJ51AW12D2
QJ51AW12D2 The abbreviation for the AnyWire DB A20 master module, QJ51AW12D2
LJ51AW12D2 The abbreviation for the AnyWire DB A20 master module, LJ51AW12D2
AnyWire DB A20 An original transmission system provided by Anywire Corporation

1INTRODUCTION
1- 1
The MELSEC-Q and L series do not have an MELSEC-I/OLINK master module. Therefore, the
alternatives are the AnyWire DB A20 or the CC-Link/LT. Features for replacement are listed in the
following table.
Replacing MELSEC-I/OLINK with AnyWire DB A20 or CC-Link/LT
: Compatible, ×: Not compatible
Point
AnyWire products are not available in some countries. For details, please consult your local Mitsubishi
representative.
This transition handbook explains replacement of the MELSEC-I/OLINK with the AnyWire DB A20.
For replacement with the CC-Link/LT, refer to the following transition handbook.
Transition from MELSEC-I/OLINK to CC-Link/LT Handbook
1
1 INTRODUCTION
1.1 Replacement with AnyWire DB A20
Item
Replacement with AnyWire DB A20 Replacement with CC-Link/LT
Compati-
bility Description Compati- bility Description
External power supply The existing I/OLINK external power supply
can be used. × A power supply adapter is necessary.
Connection type T-branch system, or tree branch system T-branch system
Connection cable The existing I/OLINK cables can be used. × New cables must be installed.
I/O module type
4, 8, or 16 points
Input module/Output module/I/O combined
module
2, 4, or 8 points
Input module/Output module/I/O combined
module
Programming ×
The master module occupies 32 points.
The I/O module address becomes the
specified device by the FROM/TO instruction.
XY address of the master module becomes
XY address of the I/O module.
Needless to change address (up to 64 points)

1INTRODUCTION
1- 2
(1) Before replacing MELSEC-I/OLINK with AnyWire DB A20, refer to the manuals for each
AnyWire DB A20 module, and check the functions, specifications, and how to use the
modules.
(2) After replacing MELSEC-I/OLINK with AnyWire DB A20, check the operation of the entire
system before starting the actual operation.
The transmission distance can be selected from 50m/200m/1km/3km using the DIP switch.
Up to 512 remote input points and 512 remote output points can be controlled by one QJ51AW12D2 or
LJ51AW12D2 (in the standard setting).
Disconnections can be detected even when the wiring is branched.
1.2 Precautions for Replacement
1.3 Features of AnyWire DB A20
AnyWire DB A20
AnyWire DB A20 master module
QJ51AW12D2
AnyWire DB A20 master module
LJ51AW12D2
AnyWire DB A20
remote I/O module (output)*
AnyWire DB A20
remote I/O module (input)*
AnyWire DB A20
terminating unit* *: Manufactured by Anywire Corporation
or

2PERFORMANCE SPECIFICATIONS COMPARISONS
2- 1
: Compatible, : Partially changed, ×: Not compatible
2
2 PERFORMANCE SPECIFICATIONS
COMPARISONS
2.1 Performance Specifications Comparison of MELSEC-I/OLINK and
AnyWire DB A20
Item
Specifications Com-
pati-
bility
Precautions for replace-
ment
MELSEC-I/OLINK AnyWire DB A20
Per single
master
station
Max. number of
link stations
16 stations
(1 station 4 points) 128 stations
Max. number of
control I/O
points
128 points
(when the same number is used on X
and Y)
1024 points
(when the same number is used on X and Y)
Link scan time
(Transmission cycle time) Approx. 5.4ms 2.7ms (for 128 points)*1
Overall distance 200m
125kHz: 50m
31.3kHz: 200m
7.8kHz: 1km
2kHz: 3km
1kHz is equivalent to 1kbps.
Communication speed 38.4kbps 125kHz/31.3kHz/7.8kHz/2kHz
Select the speed based on the
existing overall distance.
1kHz is equivalent to 1kbps.
Error control method Parity check Double-check system
The error control method is
different, but an error check
function is provided.
Network Topology Bus (T-branch available) Bus (Multidrop system, T-branch system,
star system, or tree system)
Connection cable Twisted pair cable (0.75mm2),
Cabtire cable (0.75mm2)
General-purpose 2-/4-wire cable
(VCTF, VCF 0.75 to 1.25mm2),
General-purpose wire (0.75 to 1.25mm2),
Dedicated flat cable (0.75mm2),
(When the transmission distance exceeds
200m, use wires with a diameter of 0.9 to
1.25mm2.)
Crimping terminals can be
used. However, the
communication lines and
power lines connected to the
master module must be
processed to connect to
terminals.
Terminating resistor
(terminator) Not required Required × A terminating resistor is necessary.
External
power
supply to
master
module
Voltage 21.6 to 27.6VDC 24VDC +15 to -10% (21.6 to 27.6VDC)
Ripple voltage 0.5Vp-p or less Because the external power
supply current has increased,
the current capacity must be
reviewed.
Current 0.09A 0.5A (When 128 slave modules are connected
and the load current is not included)
Number of occupied I/O
points of master module
16, 32, 48, or 64 points
(I/O assignment: Output 16/32/64
points)
32 points
(I/O assignment: intelligent 32 points)
The program and parameters
must be changed.
Internal current
consumption of master
module
0.115A QJ51AW12D2: 0.5A
LJ51AW12D2: 0.2A
Internal current consumption of
5VDC must be recalculated.