A - 12                           A - 12 
INTRODUCTION 
Thank you for purchasing the Mitsubishi Electric MELSEC-Q series programmable controllers. 
Before using this product, please read this manual carefully and develop familiarity with the functions and 
performance of the MELSEC-Q series programmable controller to handle the product correctly. 
 
CONTENTS 
SAFETY PRECAUTIONS ............................................................................................................................. A-   1 
CONDITIONS OF USE FOR THE PRODUCT ............................................................................................ A-   7 
REVISIONS ................................................................................................................................................... A-   8 
INTRODUCTION ........................................................................................................................................... A- 12 
CONTENT S ................................................................................................................................................... A- 12 
ABOUT MANUALS ....................................................................................................................................... A- 15 
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES .............................................................. A- 15 
1.  GENERAL SPECIFICATIONS AND PRECAUTIONS FOR USE  1-  1 to 1- 22 
1.1  General Specifications ............................................................................................................................ 1-   1 
1.2  Precautions for Use ................................................................................................................................ 1-   1 
1.2.1 Input module ...................................................................................................................................... 1-   1 
1.2.2 Output module ................................................................................................................................... 1-   3 
1.2.3 I/O combined module ........................................................................................................................ 1-14 
1.2.4 I/O module with protection function .................................................................................................. 1-15 
1.2.5 Interrupt module ................................................................................................................................ 1-16 
1.2.6 Installation and wiring ........................................................................................................................ 1-16 
1.3  Various Settings for I/O Module .............................................................................................................. 1-17 
1.3.1 Setting of I/O response time ............................................................................................................. 1-17 
1.3.2 Setting of error-time output mode ..................................................................................................... 1-20 
1.3.3 Switch setting of interrupt module..................................................................................................... 1-21 
2.  INPUT MODULE SPECIFICATIONS  2-  1 to 2- 36 
2.1  QX10 AC Input Module ........................................................................................................................... 2-   1 
2.2  QX10-TS AC Input Module ..................................................................................................................... 2-   2 
2.3  QX28 AC Input Module ........................................................................................................................... 2-   3 
2.4  QX40 DC Input Module (Positive Common Type) ................................................................................. 2-   4 
2.5  QX40-S1 DC Input Module (Positive Common Type) ........................................................................... 2-    5 
2.6  QX40-TS DC Input Module (Positive Common Type)  .......................................................................... 2-    6 
2.7  QX40H DC High-Speed Input Module (Positive Common Type)  ........................................................ 2-  7 
2.8  QX41 DC Input Module (Positive Common Type) ................................................................................. 2-   9 
2.9  QX41-S1 DC Input Module (Positive Common Type) ........................................................................... 2-10 
2.10  QX41-S2 DC Input Module (Positive Common Type) ......................................................................... 2-12 
2.11  QX42 DC Input Module (Positive Common Type) ............................................................................... 2-13 
2.12  QX42-S1 DC Input Module (Positive Common Type) ......................................................................... 2-15 
2.13  QX50 DC (Positive Common/Negative Common Shared Type)/ AC Input Module ........................... 2-17 
2.14  QX70 DC Input Module (Positive Common/Negative Common Shared Type) .................................. 2-18 
2.15  QX70H DC High-speed Input Module (Positive Common Type) ........................................................ 2-19 
2.16  QX71 DC Input Module (Positive/Negative Shared Common Type) .................................................. 2-21 
2.17  QX72 DC Input Module (Positive/Negative Shared Common Type) .................................................. 2-22 
2.18  QX80 DC Input Module (Negative Common Type) ............................................................................. 2-24 
2.19  QX80-TS DC Input Module (Negative Common Type) ....................................................................... 2-25