Mitsubishi Electronics LH42C4PT1P, LH42C4NT1P, LX28, LX41C4, LY20S6 User Manual

MELSEC-L I/O Module

User's Manual

-LX10

-LX28 -LX40C6 -LX41C4 -LX42C4 -LY10R2 -LY18R2A -LY20S6 -LY40NT5P -LY28S1A -LY41NT1P -LY42NT1P -LY40PT5P -LY41PT1P -LY42PT1P -LH42C4NT1P -LH42C4PT1P

SAFETY PRECAUTIONS

(Read these precautions before using this product.)

Before using this product, please read this manual and the relevant manuals carefully and pay full attention to safety to handle the product correctly.

The precautions given in this manual are concerned with this product only. For the safety precautions of the programmable controller system, refer to the user's manual for the CPU module used.

In this manual, the safety precautions are classified into two levels: "WARNING" and "CAUTION".

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.

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 manual and then keep the manual in a safe place for future reference.

1

[Design Precautions]

WARNING

●Configure safety circuits external to the programmable controller to ensure that the entire system operates safely even when a fault occurs in the external power supply or the programmable controller. Failure to do so may result in an accident due to an incorrect output or malfunction.

(1)Emergency stop circuits, protection circuits, and protective interlock circuits for conflicting operations (such as forward/reverse rotations or upper/lower limit positioning) must be configured external to the programmable controller.

(2)When the programmable controller detects an abnormal condition, it stops the operation and all outputs are:

•Turned off if the overcurrent or overvoltage protection of the power supply module is activated.

•Held or turned off according to the parameter setting if the self-diagnostic function of the CPU module detects an error such as a watchdog timer error.

Also, all outputs may be turned on if an error occurs in a part, such as an I/O control part, where the CPU module cannot detect any error. To ensure safety operation in such a case, provide a safety mechanism or a fail-safe circuit external to the programmable controller. For a fail-safe circuit example, refer to the "GENERAL SAFETY REQUIREMENTS" chapter in the Safety Guidelines included with the CPU module or head module.

(3)Outputs may remain on or off due to a failure of a component such as a transistor in an output circuit. Configure an external circuit for monitoring output signals that could cause a serious accident.

●In an output circuit, when a load current exceeding the rated current or an overcurrent caused by a load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an external safety circuit, such as a fuse.

●Configure a circuit so that the programmable controller is turned on first and then the external power supply. If the external power supply is turned on first, an accident may occur due to an incorrect output or malfunction.

●For the operating status of each station after a communication failure, refer to relevant manuals for each network. Failure to do so may result in an accident due to an incorrect output or malfunction.

●When changing data from a peripheral device connected to the CPU module to the running programmable controller, configure an interlock circuit in the 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 program, and determine corrective actions to be taken between the external device and CPU module in case of a communication failure.

2

[Design Precautions]

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.

●During control of an inductive load such as a lamp, heater, or solenoid valve, a large current (approximately ten times greater than normal) may flow when the output is turned from off to on. Therefore, use a module that has a sufficient current rating.

●After the CPU module is powered on or is reset, the time taken to enter the RUN status varies depending on the system configuration, parameter settings, and/or program size. Design circuits so that the entire system will always operate safely, regardless of the time.

[Installation Precautions]

WARNING

●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 electric shock or cause the module to fail or malfunction.

[Installation Precautions]

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 until they click. Incorrect interconnection may cause malfunction, failure, or drop of the module.

●Do not directly touch any conductive parts and electronic components of the module. Doing so can cause malfunction or failure of the module.

[Wiring Precautions]

WARNING

●Shut off the external power supply (all phases) used in the system before wiring. Failure to do so may result in electric shock or cause the module to fail or malfunction.

●After installation and wiring, attach the included terminal cover to the module before turning it on for operation. Failure to do so may result in electric shock.

3

[Wiring Precautions]

CAUTION

●Individually ground the FG and LG terminals of the programmable controller with a ground resistance of 100 ohms or less. Failure to do so may result in electric shock or malfunction.

●Use applicable solderless terminals and tighten them within the specified torque range.

If any spade solderless terminal is used, it may be disconnected when a terminal block screw comes loose, resulting in failure.

●Check the rated voltage and terminal layout before wiring to the module, and connect the cables correctly.

Connecting a power supply with a different voltage rating or incorrect wiring may cause a fire or failure.

●Connectors for external devices must be crimped or pressed with the tool specified by the manufacturer, or must be correctly soldered. Incomplete connections may cause short circuit, fire, or malfunction.

●Securely connect the connector to the module.

●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.

●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, fire, or malfunction.

●When disconnecting the cable from the module, do not pull the cable by the cable part. For the cable with connector, hold the connector part of the cable.

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.

●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.

●Mitsubishi programmable controllers must be installed in control panels. Connect the main power supply to the power supply module in the control panel through a relay terminal block.

Wiring and replacement of a power supply module must be performed by qualified maintenance personnel with knowledge of protection against electric shock.

For wiring methods, refer to the MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection).

4

[Startup and Maintenance Precautions]

WARNING

●Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.

●Correctly connect the battery connector. Do not charge, disassemble, heat, short-circuit, solder, or throw the battery into the fire. Also, do not expose it to liquid or strong shock.

Doing so will cause the battery to produce heat, explode, ignite, or leak, resulting in injury and fire.

●Shut off the external power supply (all phases) used in the system before cleaning the module or retightening the terminal block screws or connector screws. Failure to do so may result in electric shock.

[Startup and Maintenance Precautions]

CAUTION

●Before performing online operations (especially, program modification, forced output, and operating status change) for the running CPU module from the peripheral device connected, read relevant manuals carefully and ensure the safety. Improper operation may damage machines or cause accidents.

●Do not disassemble or modify the module. Doing so may cause failure, malfunction, injury, or a fire.

●Use any radio communication device such as a cellular phone or PHS (Personal Handy-phone System) more than 25cm away in all directions from the programmable controller. Failure to do so may cause malfunction.

●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 or connector 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), do not connect/disconnect the product more than 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.

[Disposal Precautions]

CAUTION

● When disposing of this product, treat it as industrial waste.

5

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.

6

INTRODUCTION

Thank you for purchasing the Mitsubishi MELSEC-L series programmable controllers. This manual describes safety precautions, specifications, and functions.

Before using this product, please read this manual and the relevant manuals carefully and develop familiarity with the functions and performance of the MELSEC-L series programmable controller to handle the product correctly.

Remark

Operating procedures are explained using GX Works2.

When using GX Developer, refer to the following.

Page 90, Appendix 4

7

COMPLIANCE WITH EMC AND LOW VOLTAGE

DIRECTIVES

(1) Method of ensuring compliance

To ensure that Mitsubishi programmable controllers maintain EMC and Low Voltage Directives when incorporated into other machinery or equipment, certain measures may be necessary. Please refer to one of the following manuals.

•MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)

•MELSEC-L CC-Link IE Field Network Head Module User's Manual

•Safety Guidelines (This manual is included with the CPU module or head module.)

The CE mark on the side of the programmable controller indicates compliance with EMC and Low Voltage Directives.

(2) Additional measures

No additional measures are necessary for the compliance of this product with EMC and Low Voltage Directives.

8

RELEVANT MANUALS

(1) CPU module user's manual

	Manual name	Description
	manual number (model code)
	MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and	Specifications of the CPU modules, power supply modules, display unit,
		branch module, extension module, SD memory cards, and batteries,
	Inspection)
		information on how to establish a system, maintenance and inspection, and
	SH-080890ENG, 13JZ36
		troubleshooting

(2) Head module User's Manual

	Manual name	Description
	manual number (model code)
	MELSEC-L CC-Link IE Field Network Head Module User's Manual	Specifications, procedures before operation, system configuration, installation,
	SH-080919ENG, 13JZ48	wiring, settings, and troubleshooting of the head module
	MELSEC-L SSCNET III/H Head Module User's Manual	Specifications, procedures before operation, system configuration, installation,
	SH-081152ENG, 13JZ78	wiring, settings, and troubleshooting of the head module

(3) Operating manual

	Manual name	Description
	manual number (model code)
	GX Works2 Version 1 Operating Manual (Common)	System configuration, parameter settings, and online operations of GX
	SH-080779ENG, 13JU63	Works2, which are common to Simple projects and Structured projects
	GX Developer Version 8 Operating Manual	Operating methods of GX Developer, such as programming, printing,
	SH-080373E, 13JU41	monitoring, and debugging

(4) User's manual for optional items

	Manual name	Description
	manual number (model code)
	Relay Terminal Module User's Manual (Hardware) A6TE2-16SRN	Specifications and part names of the A6TE2-16SRN
	IB-66833, 13JL53

9

CONTENTS

CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 1
CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 6
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 7
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 8
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 9
MANUAL PAGE ORGANIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	12
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
PACKING LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
CHAPTER 1 PRODUCT LINEUP	15
1.1 Product Lineup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15
1.2 How to Read the Model Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	16
CHAPTER 2 PART NAMES	18
CHAPTER 3 BEFORE USING I/O MODULE	20

3.1 Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.2 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.3 I/O Combined Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

CHAPTER 4 SPECIFICATIONS	28

4.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2 Input Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.2.1 LX10 AC input module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 4.2.2 LX28 AC input module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 4.2.3 LX40C6 DC input module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 4.2.4 LX41C4 DC input module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 4.2.5 LX42C4 DC input module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

4.3 Output Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4.3.1 LY10R2 contact output module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 4.3.2 LY18R2A contact output module (All points independent) . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 4.3.3 LY20S6 triac output module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 4.3.4 LY28S1A triac output module (All points independent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 4.3.5 LY40NT5P transistor output module (Sink type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 4.3.6 LY41NT1P transistor output module (Sink type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 4.3.7 LY42NT1P transistor output module (Sink type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 4.3.8 LY40PT5P transistor output module (Source type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49 4.3.9 LY41PT1P transistor output module (Source type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 4.3.10 LY42PT1P transistor output module (Source type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

4.4 I/O Combined Module Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.4.1 LH42C4NT1P DC input/transistor output combined module (Sink type) . . . . . . . . . . . . . . . . .54 4.4.2 LH42C4PT1P DC input/transistor output combined module (Source type) . . . . . . . . . . . . . . .56

CHAPTER 5 SYSTEM CONFIGURATION	58

10

	CHAPTER 6 INSTALLATION AND WIRING	61

6.1 Installation Environment and Installation Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 6.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

6.2.1 For the 18-point screw terminal block module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62 6.2.2 For the 40-pin connector type module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

6.3 Input Wiring Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

CHAPTER 7 VARIOUS SETTINGS	68

7.1 Input Response Time Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

7.2 Error Time Output Mode Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

CHAPTER 8 TROUBLESHOOTING	71

8.1 Troubleshooting for Input Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 8.2 Troubleshooting for Output Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

APPENDICES	81

Appendix 1 Optional Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Appendix 1.1 Connector/terminal block converter modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Appendix 1.2 Relay terminal module (A6TE2-16SRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Appendix 1.3 Dedicated cables with connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Appendix 1.4 Converter modules and interface modules (FA goods) . . . . . . . . . . . . . . . . . . . . . . . .87

Appendix 2 Checking Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Appendix 3 Compatibility of L series and Q series I/O module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Appendix 4 When Using GX Developer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Appendix 5 External Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Appendix 5.1 I/O modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Appendix 5.2 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Appendix 5.3 Connector/terminal block converter modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Appendix 5.4 Cable for connector/terminal block converter module . . . . . . . . . . . . . . . . . . . . . . . . .95

REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

11

MANUAL PAGE ORGANIZATION

In this manual, pages are organized and the symbols are used as shown below.

The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.

"" is used for screen names and items.

	The chapter of
	the current page is shown.
shows operating
procedures.
shows mouse
operations.*1
[ ] is used for items
in the menu bar and
the project window.
	The section of
	the current page is shown.
Ex. shows setting or
operating examples.
shows reference
manuals.
shows	shows notes that
reference pages.	requires attention.

shows useful information.

*1 The mouse operation example is provided below. (For GX Works2)

Menu bar

Ex.

[Online]

[Write to PLC...]

Select [Online] on the menu bar, and then select [Write to PLC...].

A window selected in the view selection area is displayed.

Ex.

Project window

[Parameter]

[PLC Parameter]

Select [Project] from the view selection area to open the Project window.

In the Project window, expand [Parameter] and select [PLC Parameter].

View selection area

12

Pages describing specifications are organized as shown below.

The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.

Model name and module name

Module specifications

Appearance

Derating chart (only for input modules)

Terminal connections

External connections

13

		TERMS
	Unless otherwise specified, this manual uses the following terms.
	Term	Description
	CPU module	Abbreviation for the MELSEC-L series CPU module
	Power supply module	Abbreviation for the MELSEC-L series power supply module
	Display unit	A liquid crystal display to be attached to the CPU module
	LCPU	Another term for the MELSEC-L series CPU module
	GX Works2	The product name of the software package for the MELSEC programmable controllers
	GX Developer
	L series I/O module	Abbreviation for the MELSEC-L series I/O module
	Q series I/O module	Abbreviation for the MELSEC-Q series I/O module
	I/O module	Another term for the MELSEC-L series I/O module
	ACTB	Abbreviation for the AC05TB, AC10TB, AC20TB, AC30TB, AC50TB, AC80TB, and AC100TB
	ACTE	Abbreviation for the AC06TE, AC10TE, AC30TE, AC50TE, and AC100TE
		PACKING LIST

The following items are included in the package of this product. Before use, check that all the items are included.

I/O module

Module	Before Using the Product

14

CHAPTER 1 PRODUCT LINEUP

CHAPTER 1 PRODUCT LINEUP

1.1 Product Lineup

(1) Input module

	Module name	Input specifications	Number of occupied	Current	Weight	Model name	Reference
			I/O points	consumption
		Terminal block	16 points	90mA	0.17kg	LX10	Page 29,
		100 to 120VAC, 16 points					Section 4.2.1
	AC Input module
		Terminal block	16 points	80mA	0.15kg	LX28	Page 31,
		100 to 240VAC, 8 points					Section 4.2.2
		Terminal block	16 points	90mA	0.15kg	LX40C6	Page 32,
		24VDC, 16 points					Section 4.2.3
	DC Input module	40-pin connector	32 points	100mA	0.11kg	LX41C4	Page 34,
		24VDC, 32 points					Section 4.2.4
		40-pin connector (× 2)	64 points	120mA	0.12kg	LX42C4	Page 36,
		24VDC, 64 points					Section 4.2.5

(2) Output module

	Module name		Output specifications	Number of occupied	Current	Weight	Model name	Reference
				I/O points	consumption
			Terminal block	16 points	460mA	0.21kg	LY10R2	Page 39,
			240VAC/24VDC, 2A/1 point, 16 points					Section 4.3.1
	Contact output module
			Terminal block					Page 40,
			240VAC/24VDC, 2A/1 point, 8 points	16 points	260mA	0.14kg	LY18R2A
								Section 4.3.2
			All points independent
			Terminal block	16 points	300mA	0.22kg	LY20S6	Page 41,
			100 to 240VAC, 0.6A/1 point, 16 points					Section 4.3.3
	Triac output module
			Terminal block					Page 42,
			100 to 240VAC, 1A/1 point, 8 points	16 points	200mA	0.15kg	LY28S1A
								Section 4.3.4
			All points independent
			Terminal block	16 points	100mA	0.15kg	LY40NT5P	Page 44,
			12 to 24VDC, 0.5A/1 point, 16 points					Section 4.3.5
		Sink type	40-pin connector	32 points	140mA	0.11kg	LY41NT1P	Page 45,
			12 to 24VDC, 0.1A/1 point, 32 points					Section 4.3.6
	Transistor		40-pin connector (× 2)	64 points	190mA	0.12kg	LY42NT1P	Page 47,
			12 to 24VDC, 0.1A/1 point, 64 points					Section 4.3.7
	output
			Terminal block					Page 49,
	module			16 points	100mA	0.15kg	LY40PT5P
			12 to 24VDC, 0.5A/1 point, 16 points					Section 4.3.8
		Source	40-pin connector	32 points	140mA	0.11kg	LY41PT1P	Page 50,
		type	12 to 24VDC, 0.1A/1 point, 32 points					Section 4.3.9
			40-pin connector (× 2)	64 points	190mA	0.12kg	LY42PT1P	Page 52,
			12 to 24VDC, 0.1A/1 point, 64 points					Section 4.3.10

(3) I/O combined module

			Input	Output	Number of	Current
	Module name				occupied		Weight	Model name	Reference
			specifications	specifications		consumption
					I/O points
	DC	Sink type		40-pin connector	32 points	160mA	0.12kg	LH42C4NT1P	Page 54,
	input/transistor								Section 4.4.1
			40-pin connector	12 to 24VDC,
	output
			24VDC, 32 points	0.1A/1 point, 32					Page 56,
	combined	Source type			32 points	150mA	0.12kg	LH42C4PT1P
				points					Section 4.4.2
	module

1

Lineup Product 1.1

15

1.2 How to Read the Model Name

• For input module or output module

L Y 4 0 N T 5 P

1)

2)

3)

4)

5)

6)

• For I/O combined module

L H 4 2 C 4 N T 1 P

1)

2)

3)

Input type

Output type

6)

4)

5)

4)

5)

No.

Item

Symbol

Specifications

X

Input

1)

Module type

Y

Output

H

I/O combined

Specifications

No.

Item

Symbol

Input module

Output module

AC input

DC input

Contact output

Triac output

Transistor output

Voltage

1

100 to 120VAC

-

24VDC/240VAC

-

-

2)

2

100 to 240VAC

-

-

100 to 240VAC

-

specification

4

-

24VDC

-

-

12 to 24VDC

No.

Item

Symbol

Specifications

0

16 points

3)

Number of I/O

1

32 points

points

2

64 points

8

8 points

No.

Item

Symbol

Specifications

Blank

AC input

C

DC input (positive/negative common available)

4)

I/O type

NT

Transistor output (sink type)

PT

Transistor output (source type)

R

Contact output

S

Triac output

16

CHAPTER 1 PRODUCT LINEUP

									1
					Specifications
No.	Item	Symbol	Input module			Output module
			AC input	DC input	Contact output	Triac output	Transistor output
		1	-	-	-	1A	0.1A
	Current	2	-	-	2A	-	-
5)		4	-	4mA	-	-	-
	specifications
		5	-	-	-	-	0.5A
		6	-	6mA	-	0.6A	-
No.	Item	Symbol			Specifications
6)	Extended	P	With protection function
	specification	A	Independent common

Name Model the Read to How 2.1

17

CHAPTER 2 PART NAMES

18-point screw terminal block type

40-pin connector type

	1)
	2)
3)	4)
8)	8)

1)	1)	1)
2)	2)
	7)
6)	6)
		5)
		1)
	8)

	No.	Name	Description
	1)	Module joint levers	Levers for connecting two modules
			Indicate the I/O status.
	2)	I/O operation status indicator LEDs	• On (green): I/O signal is on.
			• Off: I/O signal is off.
	3)	Terminal block	A 18-point terminal block for connecting I/O signal cables to external devices
	4)	Terminal cover	A cover for preventing electric shock
			A label on it is used for recording the signal names of devices allocated to terminals.
	5)	DIN rail hook	A hook used to mount the module to a DIN rail
	6)	Connectors for external devices (40 pins)	A connector for connecting I/O signal cables to external devices.
			• For input module or output module: Used to switch the LED indications between the first-half 32 points
	7)	Indication selector switch*1	and latter-half 32 points of a 64-point module.
			• For I/O combined module: Used to switch the LED indications between input and output.
	8)	Serial number display	Displays the serial number printed on the rating plate.

*1 Operate the Indication selector switch with your fingers. Do not use a screwdriver or similar tool as it may damage the switch.

18

CHAPTER 2 PART NAMES

Memo

2

19

CHAPTER 3 BEFORE USING I/O MODULE

3.1 Input Module

(1)Common precautions for all output modules

(a)Simultaneous on points

The number of simultaneous on points of input module depends on the input voltage and ambient temperature. Refer to the derating chart of the input module specifications. ( Page 28, CHAPTER 4)

(2)Precautions for using the DC input module

(a)Measures against back EMF

When an inductive load is connected, connect a diode in parallel with the load.

Use a diode that meets the following conditions.

•Reverse breakdown voltage is equal to or more than 10 times as large as the circuit voltage.

•Forward current is equal to or more than 2 times as large as the load current.

IN

Inductive

load

Diode

COM

Positive common

IN

Inductive

load

Diode

COM

Negative common

20

CHAPTER 3 BEFORE USING I/O MODULE

3.2 Output Module

(1)Common precautions for all output modules

(a)Maximum switching frequency when the module drives Inductive load.

The output must be on for one second or longer and off for one second or longer.

(b) Load for connection

3

When connecting a counter or timer that has a DC-DC converter as a load, select an output module whose maximum load current is larger than inrush current of the load.

Selecting an output module by average current of the load may cause a failure of the module because inrush current flows at a constant frequency at power-on or during operation due to the connected load.

If an output module needs to be selected by average current of the load, take either of the following actions to reduce an influence from inrush current.

• Connecting a resistor to the load in series

Resistor Load

Output module

• Connecting an inductor to the load in series

Inductor Load

Output module

Module Output 2.3

21

(2)Precaution for using the transistor output module

(a)Action against reverse current

If a transistor output module is wired as shown below, reverse current flows in an output element, causing a failure of the element.

When wiring a transistor output module, connect a diode as shown below.

• When connecting transistor output modules in parallel

Diode	Load
OUT1
Diode	Load
OUT2
COM
Diode
OUT1
Diode
OUT2
COM

Sink type

Diode	Load
OUT1
Diode	Load
OUT2
COM
Diode
OUT1
Diode
OUT2
COM

Source type

• When incorporating an additional circuit parallel to a transistor output module

Additional circuit

Additional circuit

OUT

Diode

COM

OUT

Diode

COM

Sink type

Source type

(b) Measures against back EMF

When an inductive load is connected, connect a diode in parallel with the load. Use a diode that meets the following conditions.

•Reverse breakdown voltage is equal to or more than 10 times as large as the circuit voltage.

•Forward current is equal to or more than 2 times as large as the load current.

	OUT	Inductive
		load
		Diode
	COM

Sink type

	OUT	Inductive
		load
		Diode
	COM

Source type

22

CHAPTER 3 BEFORE USING I/O MODULE

(3) Precautions for using the contact output module

When using the contact output module, consider the following.

•Relay life (contact switching life)

•Effects to relay life due to connected load

•Measures against back EMF

(a) Relay life (contact switching life)

3

Applicable module LY10R2, LY18R2A

The relay life depends on the operating environment. Select a module according to the operating environment. The relay lives shown below are the actual service values, not the guaranteed values. Replace the module well in advance since the actual switching life may be shorter than the one shown below.

200
100
70
50
30
20
Switching life
(10,000 times)
10
7											3
											2.
5								30VDC	=0ms		Output
		100VDC
		=7ms
								100VAC cos		=0.7	Module
3								200VAC cos		=0.7
(L/R) : Time constant								100VAC cos		=0.35
cos	: Power factor
2								200VAC cos		=0.35
								24VDC	=7ms
								120VAC cos		=0.2
1								240VAC cos		=0.2
0.1	0.2	0.3	0.5	0.7	1	2	3	5

Switching current (A)

Operating environment	Switching life
Rated switching voltage/current, rated load	100 thousand times
200VAC 1.5A, 240VAC 1A (COS = 0.7)	100 thousand times
200VAC 0.4A, 240VAC 0.3A (COS = 0.7)	300 thousand times
200VAC 1A, 240VAC 0.5A (COS = 0.35)	100 thousand times
200VAC 0.3A, 240VAC 0.15A (COS = 0.35)	300 thousand times
24VDC 1A, 100VDC 0.1A (L/R = 7ms)	100 thousand times
24VDC 0.3A, 100VDC 0.03A (L/R = 7ms)	300 thousand times

23

(b) Effects to relay life due to connected load

The actual relay life may be significantly shortened compared to the relay life curve, depending on the type of a load connected and the characteristics of inrush current. ( Page 23, Section 3.2 (3) (a)) Also, the inrush current may cause the module contact welding.

Take the following measures to prevent shortening of the relay life and the contact welding.

•Select a load so that the inrush current will be within the rated current of the module.

•Connect an external relay that can withstand the inrush current.

The following table shows the relation between the road and the inrush current.

Select a load so that the inrush current (i) and the rated current (io) will be within the rated switching current specified for the output module used.

The inrush current may flow for a longer time depending on the load.

					Inrush current				Inrush current
	Load type			Signal waveform diagram	(i)/rated current		Signal waveform diagram		(i)/rated current
					(io)				(io)
			Load of a solenoid			Load of an electromagnetic contactor
	Inductive load		i	io	Approx. 10 to 20			i: Inrush current	Approx. 3 to 10
					times	i	io	io: Rated current	times
				i: Inrush current
				io: Rated current			0.017 to 0.033 seconds
			0.07 to 0.1 seconds				(1 to 2 cycles)
		Load of an incandescent bulb				Load of a mercury lamp
					Approx. 3 to 10	i		io	Approx. 3 times*1
		i		io	times
								i: Inrush current
				i: Inrush current
								io: Rated current
				io: Rated current
							180 to 300 seconds
				Approx. 0.33 seconds
	Lamp load						(3 to 5 minutes)
		Load of a fluorescent
		i		io	Approx. 5 to 10
					times

i: Inrush current

io: Rated current

Within 10 seconds

Capacitive load*2

	Capacitive load	Approx. 20 to 40
		times
	i
		io

i: Inrush current io: Rated current

0.008 to 0.33 seconds

(0.5 to 2 cycles)

*1 Typical electric-discharge lamp circuit includes discharge tubes, transformers, choke coils, and capacitors. Therefore, note that the inrush current may flow 20 to 40 times as large as the rated current in the case of high power factor and low power impedance.

*2 When the wiring of the circuit is long, take care of the wire capacity.

24

CHAPTER 3 BEFORE USING I/O MODULE

(c) Measures against back EMF

Configure a contact protection circuit for extending the contact life, preventing noise when the contact is cut off, and suppressing the generation of carbide and nitric acid due to arc discharge.

An Incorrect contact protection circuit may cause contact welding.

Also, when using the contact protection circuit, the recovery time may be long.

The following table shows the representative examples of the contact protection circuit.

Example

Method for selecting elements

Remarks

*1

Refer to the following for constants of the

capacitor and resistor. Note that the

following values may differ depending on a

Capacitor

Inductive

nature of the load and a variation of

If a load is a relay or solenoid, the recovery

Resistor

load

characteristics of it.

time delays.

Capacitor + Resistor

• Capacitor: 0.5 to 1(µF) against load

A capacitor suppresses electric discharge

method (CR

current of 1A

while a contact is off, and a resistor

method)

• Resistor: 0.5 to 1( ) against power

restricts a flow of current while a contact is

supply voltage of 1V

on.

Use a capacitor whose withstand voltage is

equal to or more than the rated voltage. In

Capacitor

Inductive

AC circuit, use a capacitor having no

Resistor

load

polarity.

Use a diode that meets both conditions

shown below.

• Reverse breakdown voltage is equal to

The recovery time is slower than the CR

Diode method

Inductive

or more than 10 times as large as the

Diode

load

method.

circuit voltage.

• The forward current is equal to or more

than 2 times as large as the load current.

Diode + Zener diode

Use zener voltage for the zener diode

This method is effective when the recovery

method

Diode

Inductive

equal to or more than the power supply

time delays considerably by the diode

voltage.

method.

Zener Diode

load

Select a cut voltage (Vc) for the varistor to

meet the following condition.

• Vc > Power voltage × 1.5(V)

Varistor method

• Vc > Power supply voltage × 1.5(V) × √2

The recovery time delays slightly.

Varistor

Inductive

(when using AC power supply)

load

This method is not effective when the Vc is

too high

*1 When using AC power, impedance of CR must be larger enough than it of the load (prevention of a malfunction due to leak current from the CR).

●Avoid providing a contact protection circuits shown below.

These circuit are effective for preventing an arc at shut-off. However, the contact welding may occur because the charge current flows to capacitor when the contact turns on or off.

A DC inductive load is usually harder for switching than a resistor load, but if a proper protection circuit is configured, the performance will be similar to the resistor load.

Capacitor

Inductive

Capacitor

Inductive

load

load

●A protection circuit must be provided closely to a load or contact (module). If their distance is far, the protection circuit may not be effective. Appropriate distance is within 50 cm.

3

Module Output 2.3

25

(4)Precautions for using the triac output module

(a)Measures against back EMF

Take measures against back EMF to the side where the load is connected if the wiring distance from the output module to the load is long.

If not, the surge suppressor in the output module may not work effectively.

Example

Method for selecting elements

Remarks

Refer to the following for constants of the

capacitor and resistor. Note that the

following values may differ depending on a

nature of the load and a variation of

Capacitor + Resistor

characteristics of it.

If a load is a relay or solenoid, the recovery

Capacitor

• Capacitor: 0.5 to 1(µF) against load

method (CR

Inductive

current of 1A

time delays.

method)

Resistor

load

• Resistor: 0.5 to 1( ) against power

supply voltage of 1V

Use a capacitor whose withstand voltage is

equal to or more than the rated voltage.

Use a capacitor having no polarity.

Select a cut-off voltage (Vc) for the varistor

to meet the following condition.

Varistor method

• Vc > Power supply voltage × 1.5(V) × √2

The recovery time delays slightly.

Varistor

Inductive

load

This method is not effective when the Vc is

too high.

26

CHAPTER 3 BEFORE USING I/O MODULE

3.3 I/O Combined Module

This section describes the precautions for using the I/O combined module.

The precautions not described below are common to that for the input module and output module. ( Page 20, Section 3.1, Page 21, Section 3.2)

(1) I/O numbers of the I/O combined module

The I/O combined module uses same I/O number for input and output.

Because same number is used for input and output, the I/O numbers to be used can be saved.

Input (X)	Output (Y)
X00	Y00
		32 points
X1F	Y1F

(2) Applicable software

Use GX Works2 with version 1.492N or later.

The following cannot be set using GX Developer and GX Works2 whose version is earlier than 1.492N.

•"I/O Mix" cannot be selected in I/O Assignment.

•Input response time cannot be set.

•Error Time Output Mode cannot be set.

3

Module Combined I/O 3.3

27

CHAPTER 4 SPECIFICATIONS

4.1 General Specifications

For the general specifications of the I/O modules, refer to the following manual. Manual "Safety Guidelines" included in the CPU module or head module

28