Schneider Electric M251 Hardware Guide

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Modicon M251 Logic C ontroller

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Modicon M251 Logic Controller

Hardware Guide

12/2019

EIO0000003101.01

www.schneider-electric.com

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The information provided in this documentation contains general descriptions and/or technical characteristics of the performance of the products contained herein. This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications. It is the duty of any such user or integrator to perform the appropriate and complete risk analysis, evaluation and testing of the products with respect to the relevant specific application or use thereof. Neither Schneider Electric nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us.

You agree not to reproduce, other than for your own personal, noncommercial use, all or part of this document on any medium whatsoever without permission of Schneider Electric, given in writing. You also agree not to establish any hypertext links to this document or its content. Schneider Electric does not grant any right or license for the personal and noncommercial use of the document or its content, except for a non-exclusive license to consult it on an "as is" basis, at your own risk. All other rights are reserved.

All pertinent state, regional, and local safety regulations must be observed when installing and using this product. For reasons of safety and to help ensure compliance with documented system data, only the manufacturer should perform repairs to components.

When devices are used for applications with technical safety requirements, the relevant instructions must be followed.

Failure to use Schneider Electric software or approved software with our hardware products may result in injury, harm, or improper operating results.

Failure to observe this information can result in injury or equipment damage.

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Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

About the Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Part I Modicon M251 Logic Controller Introduction . . . . . .

Chapter 1 M251 General Overview . . . . . . . . . . . . . . . . . . . . . . . . . 17

M251 Logic Controller Description . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM2 Expansion Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM3 Expansion Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM3 Bus Couplers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM4 Expansion Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM5 Fieldbus Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM5 CANopen Fieldbus Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM7 CANopen Fieldbus Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2 M251 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Real Time Clock (RTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Run/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3 M251 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3.1 M251 Logic Controller General Rules for Implementing . . . . . . . . . . .

Environmental Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Certifications and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 M251 Logic Controller Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation and Maintenance Requirements . . . . . . . . . . . . . . . . . . . .

M251 Logic Controller Mounting Positions and Clearances . . . . . . . .

Top Hat Section Rail (DIN rail) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing and Removing the Controller with Expansions. . . . . . . . . . .

Direct Mounting on a Panel Surface . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 M251 Electrical Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC Power Supply Characteristics and Wiring . . . . . . . . . . . . . . . . . . .

Grounding the M251 System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18 20 23 27 36 37 38 39 40 41

44 48 49

54 55 58 59 60 63 66 70 73 74 75 78 82

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Part II Modicon M251 Logic Controller . . . . . . . . . . . . . . . .

Chapter 4 TM251MESC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

TM251MESC Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5 TM251MESE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

TM251MESE Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Part III Modicon M251 Logic Controller Communication . . .

91 95

Chapter 6 Integrated Communication Ports . . . . . . . . . . . . . . . . . . . 97

CAN Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ethernet Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM251MESE Specific Considerations . . . . . . . . . . . . . . . . . . . . . . . . .

USB Mini-B Programming Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Serial Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

98 101 103 105 106

Chapter 7 Connecting the M251 Logic Controller to a PC . . . . . . . . 109

Connecting the Controller to a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

109 113 119

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Safety Information

Important Information

NOTICE

Read these instructions carefully, and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

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PLEASE NOTE

Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.

A qualified person is one who has skills and knowledge related to the construction and operation of electrical equipment and its installation, and has received safety training to recognize and avoid the hazards involved.

QUALIFICATION OF PERSONNEL

Only appropriately trained persons who are familiar with and understand the contents of this manual and all other pertinent product documentation are authorized to work on and with this product.

The qualified person must be able to detect possible hazards that may arise from parameterization, modifying parameter values and generally from mechanical, electrical, or electronic equipment. The qualified person must be familiar with the standards, provisions, and regulations for the prevention of industrial accidents, which they must observe when designing and implementing the system.

INTENDED USE

The products described or affected by this document, together with software, accessories, and options, are programmable logic controllers (referred to herein as “logic controllers”), intended for industrial use according to the instructions, directions, examples, and safety information contained in the present document and other supporting documentation.

The product may only be used in compliance with all applicable safety regulations and directives, the specified requirements, and the technical data.

Prior to using the product, you must perform a risk assessment in view of the planned application. Based on the results, the appropriate safety-related measures must be implemented.

Since the product is used as a component in an overall machine or process, you must ensure the safety of persons by means of the design of this overall system.

Operate the product only with the specified cables and accessories. Use only genuine accessories and spare parts.

Any use other than the use explicitly permitted is prohibited and can result in unanticipated hazards.

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About the Book

At a Glance

Document Scope

Use this document to:

 Install and operate your M251 Logic Controller.  Connect the M251 Logic Controller to a programming device equipped with EcoStruxure

Machine Expert software.

 Interface the M251 Logic Controller with I/O expansion modules, HMI and other devices.  Familiarize yourself with the M251 Logic Controller features.

NOTE: Read and understand this document and all related documents before installing, operating, or maintaining your controller.

Validity Note

This document has been updated for the release of EcoStruxure

For product compliance and environmental information (RoHS, REACH, PEP, EOLI, etc.), go to

www.schneider-electric.com/green-premium

The technical characteristics of the devices described in this manual also appear online

https://www.se.com/

(

The characteristics that are described in the present document should be the same as those characteristics that appear online. In line with our policy of constant improvement, we may revise content over time to improve clarity and accuracy. If you see a difference between the document and online information, use the online information as your reference.

Machine Expert V1.2.

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Modicon M251 Logic Con troller Introductio n

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Modicon M251 Logic Con troller Introductio n

Part I

Modicon M251 Logic Controller Introduction

What Is in This Part?

This part contains the following chapters:

Chapter Chapter Name Page

1 M251 General Overview 17

2 M251 Features 43

3 M251 Installation 53

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Modicon M251 Logic Controller Introduction

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Modicon M251 Logic Con troller

M251 General Overview

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M251 General Overview

Chapter 1

M251 General Overview

Overview

This chapter provides general information about the M251 Logic Controller system architecture and its components.

What Is in This Chapter?

This chapter contains the following topics:

M251 Logic Controller Description 18

Maximum Hardware Configuration 20

TM2 Expansion Modules 23

TM3 Expansion Modules 27

TM3 Bus Couplers 36

TM4 Expansion Modules 37

TM5 Fieldbus Interfaces 38

TM5 CANopen Fieldbus Interfaces 39

TM7 CANopen Fieldbus Interfaces 40

Accessories 41

Topic Page

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M251 General Overview

M251 Logic Controller Description

Overview

The M251 Logic Controller has various powerful features and can service a wide range of applications.

Software configuration, programming, and commissioning are achieved with the EcoStruxure Machine Expert software described in the EcoStruxure Machine Expert Programming Guide

(see EcoStruxure Machine Expert, Programming Guide)

Programming Guide.

Programming Languages

The M251 Logic Controller is configured and programmed with the EcoStruxure Machine Expert software, which supports the following IEC 61131-3 programming languages:

 IL: Instruction list  ST: Structured text  FBD: Function block diagram  SFC: Sequential function chart  LD: Ladder diagram

EcoStruxure Machine Expert software can also be used to program this controller using CFC (continuous function chart) language.

Power Supply

The power supply of the M251 Logic Controller is 24 Vdc

and in the M251 Logic Controller

(seepage78)

Real Time Clock

The M251 Logic Controller includes a Real Time Clock (RTC) system

Run/Stop

The M251 Logic Controller can be operated externally by the following:

 a hardware Run/Stop switch  an EcoStruxure Machine Expert software command

Memory

This table describes the different types of memory:

Memory Type Size Used

RAM 64 Mbytes, of which 8 Mbytes

Flash 128 Mbytes To save the program and data in case of a

(seepage48)

available for the application

(see page 44)

To execute the application.

power interruption.

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Removable Storage

M251 Logic Controllers include an embedded SD card slot

The main uses of the SD card are:

 Initializing the controller with a new application  Updating the controller firmware  Applying post configuration files to the controller  Applying recipes  Receiving data logging files

Embedded Communication Features

The M251 Logic Controller native communication ports include (depending on the controller reference):

 CANopen Master  Ethernet  USB Mini-B  Serial Line

(seepage101)

(see page 105)

(see page 106)

Expansion Module and Bus Coupler Compatibility

Refer to the compatibility tables in the EcoStruxure Machine Expert - Compatiblity and Migration User Guide.

M251 Logic Controllers

(see page 49)

M251 General Overview

Reference Digital Inputs Digital Outputs Communication Ports

TM251MESC

(see page 87)

TM251MESE

(see page 91)

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0 0 1 serial line port

1 USB mini-B programming port 1 dual port Ethernet switch 1 CANopen port

0 0 1 serial line port

1 USB mini-B programming port 1 dual port Ethernet switch 1 Ethernet port for fieldbus

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M251 General Overview

Maximum Hardware Configuration

Introduction

The M251 Logic Controller is a control system that offers a scalable solution with optimized configurations and an expandable architecture.

Local and Remote Configuration Principle

The following figure defines the local and remote configurations:

(1) Local configuration (2) Remote configuration

M251 Logic Controller Local Configuration Architecture

Optimized local configuration and flexibility are provided by the association of:

 M251 Logic Controller  TM4 expansion modules  TM3 expansion modules  TM2 expansion modules

Application requirements determine the architecture of your M251 Logic Controller configuration.

The following figure represents the components of a local configuration:

(A) Expansion modules (3 maximum) (B) Expansion modules (7 maximum)

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NOTE: It is prohibited to mount a TM2 module before any TM3 module as indicated in the following figure:

M251 Logic Controller Remote Configuration Architecture

Optimized remote configuration and flexibility are provided by the association of:

 M251 Logic Controller  TM4 expansion modules  TM3 expansion modules  TM3 transmitter and receiver modules

Application requirements determine the architecture of your M251 Logic Controller configuration.

NOTE: You cannot use TM2 modules in configurations that include the TM3 transmitter and receiver modules.

The following figure represents the components of a remote configuration:

M251 General Overview

(1) Logic controller and modules (C) TM3 expansion modules (7 maximum)

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M251 General Overview

Maximum Number of Modules

The following table shows the maximum configuration supported:

References Maximum Type of Configuration

TM251•••• 7 TM3 / TM2 expansion

TM251•••• 3 TM4 expansion modules Local

TM3XREC1 7 TM3 expansion modules Remote

NOTE: TM3 transmitter and receiver modules are not included in a count of the maximum number of

expansion modules.

NOTE: The configuration with its TM4, TM3, and TM2 expansion modules is validated by EcoStruxure Machine Expert software in the Configuration window.

NOTE: In some environments, the maximum configuration populated by high consumption modules, coupled with the maximum distance allowable between the TM3 transmitter and receiver modules, may present bus communication issues although the EcoStruxure Machine Expert software allows for the configuration. In such a case you will need to analyze the power consumption of the modules chosen for your configuration, as well as the minimum cable distance required by your application, and possibly seek to optimize your choices.

Local

modules

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TM2 Expansion Modules

Overview

You can expand the number of I/Os of your M251 Logic Controller by adding TM2 I/O expansion modules.

The following types of electronic modules are supported:

 TM2 digital I/O expansion modules  TM2 analog I/O expansion modules

For more information, refer to the following documents:

 TM2 Digital I/O Expansion Modules Hardware Guide  TM2 Analog I/O Expansion Modules Hardware Guide

NOTE: TM2 modules can only be used in the local configuration, and only if there is no TM3 transmitter and receiver modules present in the configuration.

NOTE: It is prohibited to mount a TM2 module before any TM3 module. The TM2 modules must be mounted and configured at the end of the local configuration.

TM2 Digital Input Expansion Modules

The following table shows the compatible TM2 digital input expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

M251 General Overview

Reference Channels Channel Type Voltage

Current

TM2DAI8DT 8 Regular inputs 120 Vac

7.5 mA

TM2DDI8DT 8 Regular inputs 24 Vdc

7mA

TM2DDI16DT 16 Regular inputs 24 Vdc

7mA

TM2DDI16DK 16 Regular inputs 24 Vdc

5mA

TM2DDI32DK 32 Regular inputs 24 Vdc

5mA

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Terminal Type

Removable screw terminal block

HE10 (MIL 20) connector

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M251 General Overview

TM2 Digital Output Expansion Modules

The following table shows the compatible TM2 digital output expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel type Voltage

Current

TM2DRA8RT 8 Relay outputs 30 Vdc / 240 Vac

TM2DRA16RT 16 Relay outputs 30 Vdc / 240 Vac

TM2DDO8UT 8 Regular transistor

outputs (sink)

TM2DDO8TT 8 Regular transistor

outputs (source)

TM2DDO16UK 16 Regular transistor

outputs (sink)

TM2DDO16TK 16 Regular transistor

outputs (source)

TM2DDO32UK 32 Regular transistor

outputs (sink)

TM2DDO32TK 32 Regular transistor

outputs (source)

2 A max

24 Vdc

0.3 A max per output

24 Vdc

0.5 A max per output

24 Vdc

0.1 A max per output

24 Vdc

0.4 A max per output

24 Vdc

0.1 A max per output

24 Vdc

0.4 A max per output

TM2 Digital Mixed Input/Output Expansion Modules

The following table shows the compatible TM2 digital mixed I/O expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel type Voltage

Current

TM2DMM8DRT 4 Regular inputs 24 Vdc

7mA

4 Relay outputs 24 Vdc / 240 Vac

TM2DMM24DRF 16 Regular inputs 24 Vdc

8 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

7 mA

7 A maximum per common line / 2 A maximum per output

Terminal type

Removable screw terminal block

HE10 (MIL 20) connector

Terminal type

Removable screw terminal block

Non-removable spring terminal block

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TM2 Analog Input Expansion Modules

The following table shows the compatible TM2 analog input expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

M251 General Overview

Reference Channels Channel type Voltage

Current

TM2AMI2HT 2 High-level inputs 0...10 Vdc

4...20 mA

TM2AMI2LT 2 Low-level inputs Thermocouple type

J,K,T

TM2AMI4LT 4 Analog inputs 0...10 Vdc

0...20 mA PT100/1000 Ni100/1000

TM2AMI8HT 8 Analog inputs 0...20 mA

0...10 Vdc

TM2ARI8HT 8 Analog inputs NTC / PTC Removable screw

TM2ARI8LRJ 8 Analog inputs PT100/1000 RJ11 connector

TM2ARI8LT 8 Analog inputs PT100/1000 Removable screw

Terminal Type

Removable screw terminal block

terminal block

TM2 Analog Output Expansion Modules

The following table shows the compatible TM2 analog output expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel type Voltage

Current

TM2AMO1HT 1 Analog outputs 0...10 Vdc

4...20 mA

TM2AVO2HT 2 Analog outputs +/- 10 Vdc Removable screw

Terminal Type

Removable screw terminal block

terminal block

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M251 General Overview

TM2 Analog Mixed Input/Output Expansion Modules

The following table shows the compatible TM2 analog mixed I/O expansion modules with the corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel type Voltage

Current

TM2AMM3HT 2 Analog inputs 0...10 Vdc 4...20 mA Removable screw

1 Analog outputs 0...10 Vdc 4...20 mA

TM2AMM6HT 4 Analog inputs 0...10 Vdc 4...20 mA Removable screw

2 Analog outputs 0...10 Vdc 4...20 mA

TM2ALM3LT 2 Low-level inputs Thermo J,K,T,

PT100

1 Analog outputs 0...10 Vdc 4...20 mA

Terminal Type

terminal block

Removable screw terminal block

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TM3 Expansion Modules

Introduction

The range of TM3 expansion modules includes:

 Digital modules, classified as follows:

 Input modules  Output modules  Mixed input/output modules

 Analog modules, classified as follows:

 Input modules  Output modules  Mixed input/output modules

 Expert modules  Safety modules  Transmitter and Receiver modules

For more information, refer to the following documents:

 TM3 Digital I/O Modules Hardware Guide  TM3 Analog I/O Modules Hardware Guide  TM3 Expert I/O Modules Hardware Guide  TM3 Safety Modules Hardware Guide  TM3 Transmitter and Receiver Modules Hardware Guide

(see page 27)

(see page 31)

(see page 34) (see page 34)

M251 General Overview

(see page 28)

(see page 30)

(see page 32)

(see page 33)

(seepage35)

TM3 Digital Input Modules

The following table shows the TM3 digital input expansion modules, with corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel Type Voltage

Current

TM3DI8A 8 Regular inputs 120 Vac

7.5 mA

TM3DI8 8 Regular inputs 24 Vdc

7mA

TM3DI8G 8 Regular inputs 24 Vdc

7mA

TM3DI16 16 Regular inputs 24 Vdc

7mA

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Terminal Type / Pitch

Removable screw terminal block /

5.08 mm

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal blocks /

3.81 mm

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M251 General Overview

Reference Channels Channel Type Voltage

Current

TM3DI16G 16 Regular inputs 24 Vdc

7mA

TM3DI16K 16 Regular inputs 24 Vdc

5mA

TM3DI32K 32 Regular inputs 24 Vdc

5mA

TM3 Digital Output Modules

The following table shows the TM3 digital output expansion modules, with corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel Type Voltage

Current

TM3DQ8R 8 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

TM3DQ8RG 8 Relay outputs 24 Vdc / 240 Vac

TM3DQ8T 8 Regular transistor

outputs (source)

TM3DQ8TG 8 Regular transistor

outputs (source)

TM3DQ8U 8 Regular transistor

outputs (sink)

TM3DQ8UG 8 Regular transistor

outputs (sink)

TM3DQ16R 16 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

24 Vdc 4 A maximum per common line/0.5 A maximum per output

8 A maximum per common line / 2 A maximum per output

Terminal Type / Pitch

Removable spring terminal blocks /

3.81 mm

HE10 (MIL 20) connector

Terminal Type / Pitch

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal blocks /

3.81 mm

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M251 General Overview

Reference Channels Channel Type Voltage

Current

TM3DQ16RG 16 Relay outputs 24 Vdc / 240 Vac

8 A maximum per common line / 2 A maximum per output

TM3DQ16T 16 Regular transistor

outputs (source)

24 Vdc 8 A maximum per common line / 0.5 A maximum per output

TM3DQ16TG 16 Regular transistor

outputs (source)

24 Vdc 8 A maximum per common line / 0.5 A maximum per output

TM3DQ16U 16 Regular transistor

outputs (sink)

24 Vdc 8 A maximum per common line / 0.5 A maximum per output

TM3DQ16UG 16 Regular transistor

outputs (sink)

24 Vdc 8 A maximum per common line / 0.5 A maximum per output

TM3DQ16TK 16 Regular transistor

outputs (source)

24 Vdc 2 A maximum per common line / 0.1 A maximum per output

TM3DQ16UK 16 Regular transistor

outputs (sink)

24 Vdc 2 A maximum per common line / 0.1 A maximum per output

TM3DQ32TK 32 Regular transistor

outputs (source)

24 Vdc 2 A maximum per common line / 0.1 A maximum per output

TM3DQ32UK 32 Regular transistor

outputs (sink)

24 Vdc 2 A maximum per common line / 0.1 A maximum per output

Terminal Type / Pitch

Removable spring terminal blocks /

3.81 mm

Removable screw terminal blocks /

3.81 mm

Removable spring terminal blocks /

3.81 mm

Removable screw terminal blocks /

3.81 mm

Removable spring terminal blocks /

3.81 mm

HE10 (MIL 20) connector

HE10 (MIL 20) connectors

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M251 General Overview

TM3 Digital Mixed Input/Output Modules

This following table shows the TM3 mixed I/O modules, with corresponding channel type, nominal voltage/current, and terminal type:

Reference Channels Channel Type Voltage

Current

TM3DM8R 4 Regular inputs 24 Vdc

7mA

4 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

TM3DM8RG 4 Regular inputs 24 Vdc

7mA

4 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

TM3DM24R 16 Regular inputs 24 Vdc

7mA

8 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

TM3DM24RG 16 Regular inputs 24 Vdc

7mA

8 Relay outputs 24 Vdc / 240 Vac

7 A maximum per common line / 2 A maximum per output

Terminal Type / Pitch

Removable screw terminal block /

5.08 mm

Removable spring terminal block /5.08 mm

Removable screw terminal blocks / 3.81 mm

Removable spring terminal blocks / 3.81 mm

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TM3 Analog Input Modules

The following table shows the TM3 analog input expansion modules, with corresponding resolution, channel type, nominal voltage/current, and terminal type:

M251 General Overview

Reference Resolution Channels Channel

Type

TM3AI2H 16 bit, or

15 bit + sign

TM3AI2HG 16 bit, or

15 bit + sign

TM3AI4 12 bit, or

11 bit + sign

TM3AI4G 12 bit, or

11 bit + sign

TM3AI8 12 bit, or

11 bit + sign

TM3AI8G 12 bit, or

11 bit + sign

TM3TI4 16 bit, or

15 bit + sign

2 inputs 0...10 Vdc

4 inputs 0...10 Vdc

8 inputs 0...10 Vdc

4 inputs 0...10 Vdc

Mode Terminal Type /

Pitch

Removable screw

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

0...20 mA extended

4...20 mA extended

-10…+10 Vdc

0...20 mA

4...20 mA

0...20 mA extended

4...20 mA extended

-10…+10 Vdc

0...20 mA

4...20 mA Thermocouple PT100/1000 NI100/1000

terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal block /

3.81 mm

Removable spring terminal blocks /

3.81 mm

Removable screw terminal block /

3.81 mm

Removable spring terminal blocks /

3.81 mm

Removable screw terminal block /

3.81 mm

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M251 General Overview

Reference Resolution Channels Channel

Type

TM3TI4G 16 bit, or

15 bit + sign

TM3TI4D 16 bit, or

15 bit + sign

TM3TI4DG 16 bit, or

15 bit + sign

TM3TI8T 16 bit, or

15 bit + sign

TM3TI8TG 16 bit, or

15 bit + sign

4 inputs 0...10 Vdc

4 inputs Thermocouple Removable screw

4 inputs Thermocouple Removable spring

8 inputs Thermocouple

TM3 Analog Output Modules

The following table shows the TM3 analog output modules, with corresponding resolution, channel type, nominal voltage/current, and terminal type:

Mode Terminal Type /

Pitch

Removable spring

-10…+10 Vdc

0...20 mA

4...20 mA Thermocouple PT100/1000 NI100/1000

NTC/PTC Ohmmeter

terminal blocks /

3.81 mm

terminal block /

3.81 mm

terminal blocks /

3.81 mm

Removable screw terminal block /

3.81 mm

Removable spring terminal blocks /

3.81 mm

Reference Resolution Channels Channel

Type

TM3AQ2 12 bit, or

11 bit + sign

TM3AQ2G 12 bit, or

11 bit + sign

TM3AQ4 12 bit, or

11 bit + sign

TM3AQ4G 12 bit, or

11 bit + sign

2 outputs 0...10 Vdc

4 outputs 0...10 Vdc

Mode Terminal Type / Pitch

Removable screw

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

-10…+10 Vdc

0...20 mA

4...20 mA

terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

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TM3 Analog Mixed Input/Output Modules

This following table shows the TM3 analog mixed I/O modules, with corresponding resolution, channel type, nominal voltage/current, and terminal type:

M251 General Overview

Reference Resolution Channels Channel

Type

TM3AM6 12 bit, or

11 bit + sign

TM3AM6G 12 bit, or

11 bit + sign

TM3TM3 16 bit, or

15 bit + sign

12 bit, or 11 bit + sign

TM3TM3G 16 bit, or

15 bit + sign

12 bit, or 11 bit + sign

4 inputs 0...10 Vdc

2 outputs

4 inputs 0...10 Vdc

2 outputs

2 inputs 0...10 Vdc

1 outputs 0...10 Vdc

2 inputs 0...10 Vdc

1 outputs 0...10 Vdc

Mode Terminal Type / Pitch

Removable screw

-10...+10 Vdc

0...20 mA

4...20 mA

-10...+10 Vdc

0...20 mA

4...20 mA

-10...+10 Vdc

0...20 mA

4...20 mA Thermocouple PT100/1000 NI100/1000

-10...+10 Vdc

0...20 mA

4...20 mA

-10...+10 Vdc

0...20 mA

4...20 mA Thermocouple PT100/1000 NI100/1000

-10...+10 Vdc

0...20 mA

4...20 mA

terminal block /

3.81 mm

Removable spring terminal block /

3.81 mm

Removable screw terminal block /

5.08 mm

Removable spring terminal block /

5.08 mm

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M251 General Overview

TM3 Expert Modules

The following table shows the TM3 expert expansion modules, with corresponding terminal types:

Reference Description Terminal Type / Pitch

TM3XTYS4

(see Modicon TM3, Expert I/O Modules, Hardware Guide)

TM3XHSC202

(see Modicon TM3, Expert I/O Modules, Hardware Guide)

TM3XHSC202G

(see Modicon TM3, Expert I/O Modules, Hardware Guide)

TM3 Safety Modules

This table contains the TM3 safety modules, with the corresponding channel type, nominal voltage/current, and terminal type:

TeSys module 4 front connectors RJ-45

1 removable power supply connector / 5.08 mm

High Speed Counting (HSC) module Removable screw terminal

blocks / 3.81 mm

High Speed Counting (HSC) module Removable spring terminal

blocks / 3.81 mm

Reference Function

TM3 Bus Couplers

Introduction

The TM3 bus coupler is a device designed to manage fieldbus communication when using TM2 and TM3 expansion modules in a distributed architecture.

For more information, refer to the Modicon TM3 Bus Coupler Hardware Guide

Bus Coupler, Hardware Guide)

Modicon TM3 Bus Couplers

The following table shows the TM3 bus couplers, with ports and terminal types:

Reference Port Communication type Terminal type

TM3BCEIP 2 isolated switched

TM3BCSL 2 isolated ports Serial Line

(see Modicon TM3

Ethernet ports

1 USB mini-B port USB 2.0 USB mini-B

EtherNet/IP Modbus TCP

Modbus

RJ45

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TM4 Expansion Modules

Introduction

The range of TM4 expansion modules includes communication modules.

For more information, refer to the TM4 Expansion Modules Hardware Guide.

TM4 Expansion Modules

The following table shows the TM4 expansion module features:

Module reference Type Terminal type

TM4ES4 Ethernet communication 4 RJ45 connectors

TM4PDPS1 PROFIBUS DP slave communication 1 SUB-D 9 pins female connector

NOTE: The TM4ES4 module has two applications: expansion or standalone. For more information, refer to

TM4 Compatibility.

M251 General Overview

1 screw for functional ground connection

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M251 General Overview

TM5 Fieldbus Interfaces

Introduction

The TM5 fieldbus interfaces are devices designed to manage EtherNet/IP communication when using TM5 System and TM7 expansion modules with a controller in a distributed architecture.

For more information, refer to the Modicon TM5 System Interface – Hardware Guide.

TM5 Fieldbus Interfaces

The following table shows the TM5 fieldbus interfaces with ports and terminal type:

Reference Port Communication type Terminal type

TM5NEIP1 2 Ethernet switched ports EtherNet/IP RJ45

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TM5 CANopen Fieldbus Interfaces

Introduction

The TM5 fieldbus module is a CANopen interface with built-in power distribution and is the first TM5 distributed I/O island.

For more information, refer to the Modicon TM5 CANopen Interface Hardware Guide.

Modicon TM5 CANopen Fieldbus Interfaces

The following table shows the TM5 CANopen fieldbus interfaces:

Reference Communication type Terminal type

TM5NCO1 CANopen 1 SUB-D 9, male

M251 General Overview

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M251 General Overview

TM7 CANopen Fieldbus Interfaces

Introduction

The TM7 fieldbus modules are CANopen interfaces with 24 Vdc digital configurable input or output on 8 or 16 channels.

For more information, refer to the Modicon TM7 CANopen Interface I/O Blocks Hardware Guide.

Modicon TM7 CANopen Fieldbus Interfaces

The following table shows the TM7 CANopen fieldbus interfaces:

Reference Number of channels Voltage/Current Communication type Terminal type

TM7NCOM08B 8 inputs

8 outputs

TM7NCOM16A 16 inputs

16 outputs

TM7NCOM16B 16 inputs

16 outputs

24 Vdc / 4 mA 24 Vdc / 500 mA

CANopen M8 Connector

CANopen M12 Connector

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M251 General Overview

Accessories

Overview

This section describes the accessories and cables.

Accessories

Reference Description Use Quantity

TMASD1 SD Card

(see page 49)

TMAT2PSET Set of 5 removable

screw terminal block

NSYTRAAB35 End brackets Helps secure the controller or receiver module and

TM2XMTGB Grounding Bar Connects the cable shield and the module to the

TM200RSRCEMC Shielding take-up

clip

Use to update the controller firmware, initialize a controller with a new application or clone a controller, manage user files, etc.,.

Connects 24 Vdc power supply. 1

their expansion modules on a top hat section rail (DIN rail).

functional ground.

Mounts and connects the ground to the cable shielding.

Cables

25 pack

Reference Description Details Length

TCSXCNAMUM3P Terminal port/USB

port cordset

TCSMCN3M4F3C2 RS-232 serial link

cordset 1 RJ45 connector and 1 SUB-D 9 connector

TCSMCN3M4M3S2 RS-232 serial link

cordset 1 RJ45 connector and 1 SUB-D 9 connector

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From the USB mini-B port on the M251 Logic Controller to USB port on the PC terminal.

For DTE terminal (printer). 3 m

For DCE terminal (modem, converter). 3 m

3m (10 ft)

(9.84 ft)

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M251 General Overview

Reference Description Details Length

490NTW000•• Ethernet shielded

cable for DTE connections

Standard cable, equipped with RJ45 connectors at each end for DTE. CE compliant.

490NTW000••U Standard cable, equipped with RJ45

connectors at each end for DTE. UL compliant.

TCSECE3M3M••S4 Cable for harsh environment, equipped with

RJ45 connectors at each end. CE compliant.

TCSECU3M3M••S4 Cable for harsh environment, equipped with

RJ45 connectors at each end. UL compliant.

2, 5, 12, 40, or 80 m (6.56, 16.4, 39.37,

131.23 or 262.47 ft)

2, 5, 12, 40, or 80 m (6.56, 16.4, 39.37,

131.23, or 262.47 ft)

1, 2, 3, 5, or 10 m (3.28, 6.56, 9.84, 16.4,

32.81 ft)

1, 2, 3, 5, or 10 m (3.28, 6.56, 9.84, 16.4,

32.81 ft)

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Modicon M251 Logic Con troller

M251 Features

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M251 Features

Chapter 2

M251 Features

Overview

This chapter describes the Modicon M251 Logic Controller features.

What Is in This Chapter?

This chapter contains the following topics:

Real Time Clock (RTC) 44

Run/Stop 48

SD Card 49

Topic Page

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M251 Features

Real Time Clock (RTC)

Overview

The M251 Logic Controller includes an RTC to provide system date and time information, and to support related functions requiring a real-time clock. To continue keeping time when power is off, a non-rechargeable battery is required (see reference below). A battery LED on the front panel of the controller indicates if the battery is depleted or absent.

This table shows how RTC drift is managed:

RTC Characteristics Description

RTC drift Less than 60 seconds per month without any user calibration at 25 °C

Battery

The controller has one battery.

In the event of a power interruption, the backup battery maintains the RTC for the controller.

This table shows the characteristics of the battery:

Characteristics Description

Use In the event of a transient power outage, the battery powers the RTC.

Backup life At least 2 years at 25 °C maximum (77 °F). At higher temperatures, the time

Battery monitoring Yes

Replaceable Yes

Controller battery type Lithium carbon monofluoride, type Panasonic BR2032

(77 °F)

is reduced.

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Installing and Replacing the Battery

While lithium batteries are preferred due to their slow discharge and long life, they can present hazards to personnel, equipment and the environment and must be handled properly.

EXPLOSION, FIRE, OR CHEMICAL BURNS

 Replace with identical battery type.  Follow all the instructions of the battery manufacturer.  Remove all replaceable batteries before discarding unit.  Recycle or properly dispose of used batteries.  Protect battery from any potential short-circuit.  Do not recharge, disassemble, heat above 100 °C (212 °F), or incinerate.  Use your hands or insulated tools to remove or replace the battery.  Maintain proper polarity when inserting and connecting a new battery.

Failure to follow these instructions will result in death or serious injury.

To install or replace the battery, follow these steps:

Step Action

1 Remove power from your controller.

2 Use an insulated screw-driver to pull out the battery holder.

M251 Features

DANGER

3 Side out the battery holder of the controller

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M251 Features

Step Action

4 Remove the battery from the battery holder.

5 Insert the new battery into the battery holder in accordance with the polarity markings on the

battery.

6 Replace the battery holder on the controller and verify that the latch clicks into place.

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M251 Features

Step Action

7 Slide in the battery holder of the controller.

8 Power up your M251 Logic Controller.

9 Set the internal clock. For further details on the internal clock, refer to M251 Logic Controller

Programming Guide

(see Modicon M251 Logic Controller, Programming Guide)

NOTE: Replacement of the battery in the controllers other than with the type specified in this documentation may present a risk of fire or explosion.

WARNING

IMPROPER BATTERY CAN PROVOKE FIRE OR EXPLOSION

Replace battery only with identical type: Panasonic Type BR2032.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

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M251 Features

Run/Stop

The M251 Logic Controller can be operated externally by the following:

 a hardware Run/Stop switch  an EcoStruxure Machine Expert software command.

The M251 Logic Controller has a Run/Stop hardware switch, which puts the controller in a RUN or STOP state.

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SD Card

Overview

When handling the SD card, follow the instructions below to help prevent internal data on the SD card from being corrupted or lost or an SD card malfunction from occurring:

LOSS OF APPLICATION DATA

 Do not store the SD card where there is static electricity or probable electromagnetic fields.  Do not store the SD card in direct sunlight, near a heater, or other locations where high

 Do not bend the SD card.  Do not drop or strike the SD card against another object.  Keep the SD card dry.  Do not touch the SD card connectors.  Do not disassemble or modify the SD card.  Use only SD cards formatted using FAT or FAT32.

Failure to follow these instructions can result in equipment damage.

The M251 Logic Controller does not recognize NTFS formatted SD cards. Format the SD card on your computer using FAT or FAT32.

When using the M251 Logic Controller and an SD card, observe the following to avoid losing valuable data:

 Accidental data loss can occur at any time. Once data is lost it cannot be recovered.  If you forcibly extract the SD card, data on the SD card may become corrupted.  Removing an SD card that is being accessed could damage the SD card, or corrupt its data.  If the SD card is not positioned correctly when inserted into the controller, the data on the card

M251 Features

NOTICE

temperatures can occur.

and the controller could become damaged.

NOTICE

LOSS OF APPLICATION DATA

 Backup SD card data regularly.  Do not remove power or reset the controller, and do not insert or remove the SD card while it

is being accessed.

Failure to follow these instructions can result in equipment damage.

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M251 Features

This figure shows the SD card slot:

It is possible to set the Write-Control Tab to prevent write operations to the SD card. Push the tab up, as shown in the example on the right-hand side, to release the lock and enable writing to the SD card. Before using an SD card, read the manufacturer's instructions.

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Step Action

1 Insert the SD card into the SD card slot:

2 Push until you hear it “click”:

M251 Features

SD Card Slot Characteristics

Topic Characteristics Description

Supported type Standard Capacity SD (SDSC)

High Capacity SDHC

Global memory Size 16 GB max.

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M251 Features

TMASD1 Characteristics

Characteristics Description

Card removal durability Minimum 1000 times

File retention time 10 years @ 25 °C (77 °F)

Flash type SLC NAND

Memory size 256 MB

Ambient operation temperature –10 … +85°C (14...185 °F)

Storage temperature –25 … +85°C (–13...185 °F)

Relative humidity 95% max. non-condensing

Write/Erase cycles 3,000,000 (approximately)

NOTE: The TMASD1 has been rigorously tested in association with the logic controller. For other commercially available cards, consult your local sales representative.

NOTE: The SD card can be used directly on your PC.

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Modicon M251 Logic Con troller

M251 Installation

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M251 Installation

Chapter 3

M251 Installation

Overview

This chapter provides installation safety guidelines, device dimensions, mounting instructions, and environmental specifications.

What Is in This Chapter?

This chapter contains the following sections:

Section Topic Page

3.1 M251 Logic Controller General Rules for Implementing 54

3.2 M251 Logic Controller Installation 59

3.3 M251 Electrical Requirements 74

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M251 Installation

M251 Logic Controller G eneral Rules for Implementing

Section 3.1

M251 Logic Controller General Rules for Implementing

What Is in This Section?

This section contains the following topics:

Environmental Characteristics 55

Certifications and Standards 58

Topic Page

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Environmental Characteristics

Enclosure Requirements

M251 Logic Controller system components are designed as Zone B, Class A industrial equipment according to IEC/CISPR Publication 11. If they are used in environments other than those described in the standard, or in environments that do not meet the specifications in this manual, the ability to meet electromagnetic compatibility requirements in the presence of conducted and/or radiated interference may be reduced.

All M251 Logic Controller system components meet European Community (CE) requirements for open equipment as defined by IEC/EN 61131-2. You must install them in an enclosure designed for the specific environmental conditions and to minimize the possibility of unintended contact with hazardous voltages. Use metal enclosures to improve the electromagnetic immunity of your M251 Logic Controller system. Use enclosures with a keyed locking mechanism to minimize unauthorized access.

Environmental Characteristics

All the M251 Logic Controller module components are electrically isolated between the internal electronic circuit and the input/output channels within the limits set forth and described by these environmental characteristics. For more information on electrical isolation, see the technical specifications of your particular controller found later in the current document. This equipment meets CE requirements as indicated in the table below. This equipment is intended for use in a Pollution Degree 2 industrial environment.

M251 Installation

WARNING

UNINTENDED EQUIPMENT OPERATION

Do not exceed any of the rated values specified in the environmental and electrical characteristics tables.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

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M251 Installation

The following table shows the general environmental characteristics:

Characteristic Minimum

Tested Range

Specification

Standard compliance IEC/EN 61131-2

– IEC/EN 61010-2201

Ambient operating temperature – Horizontal

–10...55 °C (14...131 °F)

installation

– Vertical installation –10...35 °C (14...95 °F)

Storage temperature – –25...70 °C (- 13...158 °F)

Relative humidity – Transport and

10...95 % (non-condensing)

storage

Operation 10...95 % (non-condensing)

Degree of pollution IEC/EN 60664-1 2

Degree of protection IEC/EN 61131-2 IP20 with protective covers in place

Corrosion immunity – Atmosphere free from corrosive gases

Operating altitude – 0...2000 m (0...6560 ft)

Storage altitude – 0...3000 m (0...9843 ft)

Vibration resistance IEC/EN 61131-2 Panel mounting or

mounted on a top

hat section rail (DIN

rail)

3.5 mm (0.13 in) fixed amplitude from 5...8.4 Hz

9.8 m/s

(32.15 ft/s2) (1 gn) fixed

acceleration from 8.4...150 Hz 10 mm (0.39 in) fixed amplitude from 5...8.7 Hz

29.4 m/s

(96.45 ft/s2) (3 gn) fixed

acceleration from 8.7...150 Hz

Mechanical shock resistance –

147 m/s

or 482.28 ft/s2 (15 gn) for a duration of 11 ms

NOTE: The tested ranges may indicate values beyond that of the IEC Standard. However, our internal standards

define what is necessary for industrial environments. In all cases, we uphold the minimum specification if indicated.

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Electromagnetic Susceptibility

The M251 Logic Controller system meets electromagnetic susceptibility specifications as indicated in the following table:

Characteristic Minimum Specification Tested Range

Electrostatic discharge IEC/EN 61000-4-2 8 kV (air discharge)

4 kV (contact discharge)

Radiated electromagnetic field

Fast transients burst IEC/EN 61000-4-4 24 Vdc main

Surge immunity IEC/EN 61000-4-5

Induced electromagnetic field IEC/EN 61000-4-6 10 Vrms (0.15...80 MHz)

Conducted emission IEC 61000-6-4

Radiated emission IEC 61000-6-4 30...230 MHz: 40 dBμV/m QP

1 Common Mode 2 Differential Mode

IEC/EN 61000-4-3 10 V/m (80...1000 MHz)

3 V/m (1.4...2 GHz) 1 V/m (2...3 GHz)

2kV (CM

power lines

24 Vdc I/Os 2 kV (clamp)

Relay output 1 kV (clamp)

Digital I/Os 1 kV (clamp)

Communication

1kV (clamp)

line

IEC/EN 61131-2

–

DC Power lines 0.5 kV 0.5 kV

Relay Outputs – –

24 Vdc I/Os – –

Shielded cable

1kV – (between shield and ground)

 10...150 kHz: 120...69 dBμV/m QP  150...1500 kHz: 79...63 dBμV/m QP  1.5...30 MHz: 63 dBμV/m QP

230...1000 MHz: 47 dBμV/m QP

and DM2)

M251 Installation

NOTE: The tested ranges may indicate values beyond that of the IEC Standard. However, our internal standards

define what is necessary for industrial environments. In all cases, we uphold the minimum specification if indicated.

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M251 Installation

Certifications and Standards

Introduction

The M251 Logic Controllers are designed to conform to the main national and international standards concerning electronic industrial control devices:

 IEC/EN 61131-2  UL 508  CSA 22.2 n° 142  CSA E61131-2

The M251 Logic Controllers have obtained the following conformity marks:

 CE  cULus  CSA

For product compliance and environmental information (RoHS, REACH, PEP, EOLI, etc.), go to

www.schneider-electric.com/green-premium

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M251 Logic Controller Installation

Section 3.2

M251 Logic Controller Installation

What Is in This Section?

This section contains the following topics:

Installation and Maintenance Requirements 60

M251 Logic Controller Mounting Positions and Clearances 63

Top Hat Section Rail (DIN rail) 66

Installing and Removing the Controller with Expansions 70

Direct Mounting on a Panel Surface 73

M251 Installation

Topic Page

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M251 Installation

Installation and Maintenance Requirements

Before Starting

Read and understand this chapter before beginning the installation of your system.

The use and application of the information contained herein require expertise in the design and programming of automated control systems. Only you, the user, machine builder or integrator, can be aware of all the conditions and factors present during installation and setup, operation, and maintenance of the machine or process, and can therefore determine the automation and associated equipment and the related safeties and interlocks which can be effectively and properly used. When selecting automation and control equipment, and any other related equipment or software, for a particular application, you must also consider any applicable local, regional or national standards and/or regulations.

Pay particular attention in conforming to any safety information, different electrical requirements, and normative standards that would apply to your machine or process in the use of this equipment.

Disconnecting Power

All options and modules should be assembled and installed before installing the control system on a mounting rail, onto a mounting plate or in a panel. Remove the control system from its mounting rail, mounting plate or panel before disassembling the equipment.

HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH

 Disconnect all power from all equipment including connected devices prior to removing any

covers or doors, or installing or removing any accessories, hardware, cables, or wires except under the specific conditions specified in the appropriate hardware guide for this equipment.

 Always use a properly rated voltage sensing device to confirm the power is off where and when

indicated.

 Replace and secure all covers, accessories, hardware, cables, and wires and confirm that a

proper ground connection exists before applying power to the unit.

 Use only the specified voltage when operating this equipment and any associated products.

Failure to follow these instructions will result in death or serious injury.

DANGER

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Programming Considerations

UNINTENDED EQUIPMENT OPERATION

 Only use software approved by Schneider Electric for use with this equipment.  Update your application program every time you change the physical hardware configuration.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Operating Environment

In addition to the Environmental Characteristics, refer to Product Related Information in the beginning of the present document for important information regarding installation in hazardous locations for this specific equipment.

UNINTENDED EQUIPMENT OPERATION

Install and operate this equipment according to the conditions described in the Environmental Characteristics.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

M251 Installation

WARNING

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M251 Installation

Installation Considerations

UNINTENDED EQUIPMENT OPERATION

 Use appropriate safety interlocks where personnel and/or equipment hazards exist.  Install and operate this equipment in an enclosure appropriately rated for its intended

environment and secured by a keyed or tooled locking mechanism.

 Use the sensor and actuator power supplies only for supplying power to the sensors or

actuators connected to the module.

 Power line and output circuits must be wired and fused in compliance with local and national

regulatory requirements for the rated current and voltage of the particular equipment.

 Do not use this equipment in safety-critical machine functions unless the equipment is

otherwise designated as functional safety equipment and conforming to applicable regulations and standards.

 Do not disassemble, repair, or modify this equipment.  Do not connect any wiring to reserved, unused connections, or to connections designated as

No Connection (N.C.).

Failure to follow these instructions can result in death, serious injury, or equipment damage.

NOTE: JDYX2 or JDYX8 fuse types are UL-recognized and CSA approved.

WARNING

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M251 Logic Controller Mounting Positions and Clearances

Introduction

This section describes the correct mounting positions for the M251 Logic Controller.

NOTE: Keep adequate spacing for proper ventilation and to maintain the operating temperature specified in the Environmental Characteristics

Correct Mounting Position

To obtain optimal operating characteristics, the M251 Logic Controller should be mounted horizontally on a vertical plane as shown in the figure below:

Acceptable Mounting Positions

The M251 Logic Controller can also be mounted vertically on a vertical plane as shown below.

(seepage55)

M251 Installation

NOTE: Expansion modules must be mounted above the controller.

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M251 Installation

Incorrect Mounting Position

The M251 Logic Controller should only be positioned as shown in the Correct Mounting Position figure. The figures below show the incorrect mounting positions.

Minimum Clearances

UNINTENDED EQUIPMENT OPERATION

 Place devices dissipating the most heat at the top of the cabinet and ensure adequate

ventilation.

 Avoid placing this equipment next to or above devices that might cause overheating.  Install the equipment in a location providing the minimum clearances from all adjacent

structures and equipment as directed in this document.

 Install all equipment in accordance with the specifications in the related documentation.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

The M251 Logic Controller has been designed as an IP20 product and must be installed in an enclosure. Clearances must be respected when installing the product.

There are 3 types of clearances to consider:

 The M251 Logic Controller and all sides of the cabinet (including the panel door).  The M251 Logic Controller terminal blocks and the wiring ducts to help reduce potential

electromagnetic interference between the controller and the duct wiring.

 The M251 Logic Controller and other heat generating devices installed in the same cabinet.

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M251 Installation

The following figure shows the minimum clearances that apply to all M251 Logic Controller references:

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M251 Installation

Top Hat Section Rail (DIN rail)

Dimensions of Top Hat Section Rail DIN Rail

You can mount the controller or receiver and their expansions on a 35 mm (1.38 in.) top hat section rail (DIN rail). The DIN rail can be attached to a smooth mounting surface or suspended from a EIA rack or mounted in a NEMA cabinet.

Symmetric Top Hat Section Rails (DIN Rail)

The following illustration and table indicate the references of the top hat section rails (DIN rail) for the wall-mounting range:

Reference Type Rail Length (B)

NSYSDR50A A 450 mm (17.71 in.)

NSYSDR60A A 550 mm (21.65 in.)

NSYSDR80A A 750 mm (29.52 in.)

NSYSDR100A A 950 mm (37.40 in.)

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M251 Installation

The following illustration and table indicate the references of the symmetric top hat section rails (DIN rail) for the metal enclosure range:

Reference Type Rail Length (B-12 mm)

NSYSDR60 A 588 mm (23.15 in.)

NSYSDR80 A 788 mm (31.02 in.)

NSYSDR100 A 988 mm (38.89 in.)

NSYSDR120 A 1188 mm (46.77 in.)

The following illustration and table indicate the references of the symmetric top hat section rails (DIN rail) of 2000 mm (78.74 in.):

Reference Type Rail Length

NSYSDR200

NSYSDR200D

A 2000 mm (78.74 in.)

1 Unperforated galvanized steel 2 Perforated galvanized steel

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M251 Installation

Double-Profile Top Hat Section Rails (DIN rail)

The following illustration and table indicate the references of the double-profile top hat section rails (DIN rails) for the wall-mounting range:

Reference Type Rail Length (B)

NSYDPR25 W 250 mm (9.84 in.)

NSYDPR35 W 350 mm (13.77 in.)

NSYDPR45 W 450 mm (17.71 in.)

NSYDPR55 W 550 mm (21.65 in.)

NSYDPR65 W 650 mm (25.60 in.)

NSYDPR75 W 750 mm (29.52 in.)

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M251 Installation

The following illustration and table indicate the references of the double-profile top hat section rails (DIN rail) for the floor-standing range:

Reference Type Rail Length (B)

NSYDPR60 F 588 mm (23.15 in.)

NSYDPR80 F 788 mm (31.02 in.)

NSYDPR100 F 988 mm (38.89 in.)

NSYDPR120 F 1188 mm (46.77 in.)

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M251 Installation

Installing and Removing the Controller with Expansions

Overview

This section describes how to install and remove the controller with its expansion modules from a top hat section rail (DIN rail).

To assemble expansion modules to a controller or receiver module, or to other modules, refer to the respective expansion modules hardware guide(s).

Installing a Controller with its Expansions on a DIN Rail

The following procedure describes how to install a controller with its expansion modules on a top hat section rail (DIN rail):

Step Action

1 Fasten the top hat section rail (DIN rail) to a panel surface using screws.

2 Position the top groove of the controller and its expansion modules on the top

edge of the DIN rail and press the assembly against the top hat section rail (DIN rail) until you hear the top hat section rail (DIN rail) clip snap into place.

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Step Action

3 Place 2 terminal block end clamps on both sides of the controller and

expansion module assembly.

AB1AB8P35

NOTE: Type ABB8P35 or equivalent terminal block end clamps help

minimize sideways movement and improve the shock and vibration characteristics of the controller and expansion module assembly.

M251 Installation

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M251 Installation

Removing a Controller with its Expansions from a Top Hat Section Rail (DIN Rail)

The following procedure describes how to remove a controller with its expansion modules from a top hat section rail (DIN rail):

Step Action

1 Remove all power from your controller and expansion modules.

2 Insert a flat screwdriver into the slot of the top hat section rail (DIN rail) clip.

3 Pull down the DIN rail clip.

4 Pull the controller and its expansion modules from the top hat section rail (DIN rail)

from the bottom.

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Direct Mounting on a Panel Surface

Overview

This section shows how to install M251 Logic Controller on a panel surface using the mounting holes.

Mounting Hole Layout

This diagram shows the mounting hole layout for M251 Logic Controller:

M251 Installation

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M251 Installation

M251 Electrical Requirements

Section 3.3

M251 Electrical Requirements

What Is in This Section?

This section contains the following topics:

Wiring Best Practices 75

DC Power Supply Characteristics and Wiring 78

Grounding the M251 System 82

Topic Page

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Wiring Best Practices

Overview

This section describes the wiring guidelines and associated best practices to be respected when using the M251 Logic Controller system.

HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH

 Disconnect all power from all equipment including connected devices prior to removing any

covers or doors, or installing or removing any accessories, hardware, cables, or wires except under the specific conditions specified in the appropriate hardware guide for this equipment.

 Always use a properly rated voltage sensing device to confirm the power is off where and when

indicated.

 Replace and secure all covers, accessories, hardware, cables, and wires and confirm that a

proper ground connection exists before applying power to the unit.

 Use only the specified voltage when operating this equipment and any associated products.

Failure to follow these instructions will result in death or serious injury.

LOSS OF CONTROL

 The designer of any control scheme must consider the potential failure modes of control paths

 Separate or redundant control paths must be provided for critical control functions.  System control paths may include communication links. Consideration must be given to the

implications of unanticipated transmission delays or failures of the link.

 Observe all accident prevention regulations and local safety guidelines.  Each implementation of this equipment must be individually and thoroughly tested for proper

operation before being placed into service.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

M251 Installation

DANGER

WARNING

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M251 Installation

Wiring Guidelines

This rules must be applied when wiring a M251 Logic Controller system:

 Communication wiring must be kept separate from the power wiring. Route these 2 types of

wiring in separate cable ducting.

 Verify that the operating conditions and environment are within the specification values.  Use proper wire sizes to meet voltage and current requirements.  Use copper conductors (required).  Use twisted pair, shielded cables for networks, and fieldbus.

Use shielded, properly grounded cables for all communication connections. If you do not use shielded cable for these connections, electromagnetic interference can cause signal degradation. Degraded signals can cause the controller or attached modules and equipment to perform in an unintended manner.

UNINTENDED EQUIPMENT OPERATION

 Use shielded cables for all communication signals.

 Ground cable shields for all communication signals at a single point  Route communication separately from power cables.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Multipoint grounding is permissible if connections are made to an equipotential ground plane

dimensioned to help avoid cable shield damage in the event of power system short-circuit currents.

For more details, refer to Grounding Shielded Cables

NOTE: Surface temperatures may exceed 60 °C (140 °F). To conform to IEC 61010 standards, route primary wiring (wires connected to power mains) separately and apart from secondary wiring (extra low voltage wiring coming from intervening power sources). If that is not possible, double insulation is required such as conduit or cable gains.

WARNING

(see page 83)

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Rules for Removable Screw Terminal Block

The following tables show the cable types and wire sizes for a 5.08 pitch removable screw terminal block (power supply):

The use of copper conductors is required.

LOOSE WIRING CAUSES ELECTRIC SHOCK

Tighten connections in conformance with the torque specifications.

Failure to follow these instructions will result in death or serious injury.

FIRE HAZARD

Use only the correct wire sizes for the maximum current capacity of the power supplies.

Failure to follow these instructions will result in death or serious injury.

M251 Installation

DANGER

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M251 Installation

DC Power Supply Characteristics and Wiring

Overview

This section provides the characteristics and the wiring diagrams of the DC power supply.

DC Power Supply Voltage Range

If the specified voltage range is not maintained, outputs may not switch as expected. Use appropriate safety interlocks and voltage monitoring circuits.

DANGER

FIRE HAZARD

 Use only the correct wire sizes for the maximum current capacity of the I/O channels and

power supplies.

 For relay output (2 A) wiring, use conductors of at least 0.5 mm

rating of at least 80 °C (176 °F).

 For common conductors of relay output wiring (7 A), or relay output wiring greater than 2 A,

use conductors of at least 1.0 mm2 (AWG 16) with a temperature rating of at least 80 °C (176 °F).

Failure to follow these instructions will result in death or serious injury.

(AWG 20) with a temperature

WARNING

UNINTENDED EQUIPMENT OPERATION

Do not exceed any of the rated values specified in the environmental and electrical characteristics tables.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

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DC Power Supply Requirements

The M251 Logic Controllerand associated I/O (TM2, TM3, with a nominal voltage of 24 Vdc. The 24 Vdc power supplies must be rated Safety Extra Low Voltage (SELV) or Protective Extra Low Voltage (PELV) according to IEC 61140. These power supplies are isolated between the electrical input and output circuits of the power supply.

POTENTIAL OF OVERHEATING AND FIRE

 Do not connect the equipment directly to line voltage.

 Use only isolating PELV power supplies and circuits to supply power to the equipment

Failure to follow these instructions can result in death, serious injury, or equipment damage.

For compliance to UL (Underwriters Laboratories) requirements, the power supply must also conform to the various criteria of NEC Class 2, and be inherently current limited to a maximum power output availability of less than 100 VA (approximately 4 A at nominal voltage), or not inherently limited but with an additional protection device such as a circuit breaker or fuse meeting the requirements of clause 9.4 Limited-energy circuit of UL 61010-1. In all cases, the current limit should never exceed that of the electric characteristics and wiring diagrams for the equipment described in the present documentation. In all cases, the power supply must be grounded, and you must separate Class 2 circuits from other circuits. If the indicated rating of the electrical characteristics or wiring diagrams are greater than the specified current limit, multiple Class 2 power supplies may be used.

WARNING

M251 Installation

Controller DC Characteristics

This table shows the characteristics of the DC power supply required for the controller:

Characteristic Value

Rated voltage 24 Vdc

Power supply voltage range 19.2...28.8 Vdc

Power interruption time 10 ms at 24 Vdc

Maximum inrush current 50 A

Power consumption

Isolation between DC power supply and internal

logic

between DC power supply and protective earth ground (PE)

(1) Controller + 7 TM3 expansion modules

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32.6 W, max. 40.4 W

Not isolated

500 Vac

(1)

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M251 Installation

Power Interruption

The duration of power interruptions where the M251 Logic Controller is able to continue normal operation varies depending upon the load to the power supply of the controller, but a minimum of 10 ms is maintained as specified by IEC standards.

When planning the management of the power supplied to the controller, you must consider the power interruption duration due to the fast cycle time of the controller.

There could potentially be many scans of the logic and consequential updates to the I/O image table during the power interruption, while there is no external power supplied to the inputs, the outputs or both depending on the power system architecture and power interruption circumstances.

UNINTENDED EQUIPMENT OPERATION

 Individually monitor each source of power used in the controller system including input power

supplies, output power supplies and the power supply to the controller to allow appropriate system shutdown during power system interruptions.

 The inputs monitoring each of the power supply sources must be unfiltered inputs.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

DC Power Supply Wiring Diagram

This figure shows the power supply terminal block removal procedure:

WARNING

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The following figure shows the wiring of the DC power supply:

* Type T fuse

M251 Installation

For more information, refer to the 5.08 pitch Rules for Removable Screw Terminal block

(see page 77)

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M251 Installation

Grounding the M251 System

Overview

To help minimize the effects of electromagnetic interference, cables carrying fieldbus communication signals must be shielded.

UNINTENDED EQUIPMENT OPERATION

 Use shielded cables for communication signals.

 Ground cable shields for communication signals at a single point  Always comply with local wiring requirements regarding grounding of cable shields.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Multipoint grounding is permissible if connections are made to an equipotential ground plane

dimensioned to help avoid cable shield damage in the event of power system short-circuit currents.

The use of shielded cables requires compliance with the following wiring rules:

 For protective ground connections (PE), metal conduit or ducting can be used for part of the

shielding length, provided there is no break in the continuity of the ground connections. For functional ground (FE), the shielding is intended to attenuate electromagnetic interference and the shielding must be continuous for the length of the cable. If the purpose is both functional and protective, as is often the case for communication cables, the cable must have continuous shielding.

 Wherever possible, keep cables carrying one type of signal separate from the cables carrying

other types of signals or power.

WARNING

Protective Ground (PE) on the Backplane

The protective ground (PE) should be connected to the conductive backplane by a heavy-duty wire, usually a braided copper cable with the maximum allowable cable section.

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Shielded Cables Connections

Cables carrying fieldbus communication signals must be shielded. The shielding must be securely connected to ground. The fieldbus communication cable shields must be connected to the protective ground (PE) with a connecting clamp secured to the conductive backplane of your installation.

The shielding of the Modbus cable must be connected to the protective ground (PE).

HAZARD OF ELECTRIC SHOCK

 The grounding terminal connection (PE) must be used to provide a protective ground at all

times.

 Make sure that an appropriate, braided ground cable is attached to the PE/PG ground terminal

before connecting or disconnecting the network cable to the equipment.

Failure to follow these instructions will result in death or serious injury.

ACCIDENTAL DISCONNECTION FROM PROTECTIVE GROUND (PE)

 Do not use the TM2XMTGB Grounding Plate to provide a protective ground (PE).  Use the TM2XMTGB Grounding Plate only to provide a functional ground (FE).

Failure to follow these instructions can result in death, serious injury, or equipment damage.

M251 Installation

DANGER

WARNING

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M251 Installation

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Modicon M251 Logic Con troller

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Modicon M251 Logic Con troller

Part II

Modicon M251 Logic Controller

What Is in This Part?

This part contains the following chapters:

Chapter Chapter Name Page

4 TM251MESC 87

5 TM251MESE 91

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Modicon M251 Logic Controller

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Modicon M251 Logic Con troller

TM251MESC

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TM251MESC

Chapter 4

TM251MESC

TM251MESC Presentation

Description

This figure shows the different components of the TM251MESC logic controller:

N° Description Refer to

1 Dual port Ethernet switch Ethernet port

(see page 101)

2 CANopen port CANopen port

3 Serial line port / Type RJ45 (RS-232 or RS-485) Serial Line

4 Run/Stop switch Run/Stop

(see page 106)

(see page 48)

5 Status LEDs –

6 TM4 bus connector TM4 Expansion Modules

7 TM3/TM2 bus connector TM3 Expansion Modules

8 SD card slot SD Card

9 USB mini-B programming port / For terminal connection to a

programming PC (EcoStruxure Machine Expert)

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USB Mini-B Programming Port

(see page 105)

(see page 49)

(see page 37)

(see page 27)

Page 88

TM251MESC

N° Description Refer to

10 Surface mounting lugs –

11 Clip-on lock for 35 mm (1.38 in.) top hat section rail (DIN-rail) Top Hat Section Rail

12 24 Vdc power supply DC Power supply Characteristics and

Wiring

(see page 78)

13 Protective cover (SD card slot and USB mini-B programming

port)

14 Locking hook (Hook not included) –

15 Battery holder Real Time Clock (RTC)

–

(see page 66)

(see page 44)

Status LEDs

This figure shows the status LEDs:

The following table describes the system status LEDs:

Label Function

Type

PWR Power Green On Indicates that power is applied.

RUN Machine

status

Color Status Description

Off Indicates that power is removed.

Green On Indicates that the controller is running a valid application.

Flashing Indicates that the controller has a valid application that is

stopped.

1 flash Indicates that the controller has paused at BREAKPOINT.

Off Indicates that the controller is not programmed

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TM251MESC

Label Function

Type

ERR Internal Error Red On Indicates that an operating system error has been detected

I/O I/O error Red On Indicates device errors on the serial line, SD card, TM4 bus,

SD SD card

access

BAT Battery Red On Indicates that the battery needs to be replaced.

ETH Ethernet port

status

SL Serial line Green On Indicates the status of serial line

TM4 Error on TM4

bus

CAN-R CANopen

running status

CAN-E CANopen

error

Color Status Description

Fast flashing Indicates that the controller has detected an internal error

Slow flashing Indicates either that a minor error has been detected if RUN

is ON or that no application has been detected

TM3 bus, Ethernet port(s) or CANopen port.

Green On Indicates that the SD card is being accessed

Flashing Indicates that the battery charge is low.

Green On Indicates that the ethernet port is connected and the IP

3 flashes Indicates that the ethernet port is not connected.

4 flashes Indicates that the IP address is already in used.

5 flashes Indicates that the module is waiting for BOOTP or DHCP

6 flashes Indicates that the configured IP address is not valid.

address is defined.

sequence.

(see page 108)

Off Indicates no serial communication

Red On Indicates that an error has been detected on the TM4 bus

Off Indicates that no error has been detected on the TM4 bus

Green On Indicates that the CANopen bus is operational.

Off Indicates that the CANopen master is configured.

Flashing Indicates that the CANopen bus is being initialized.

1 flash per second

Red On Indicates that the CANopen bus is stopped (BUS OFF).

Off Indicates no CANopen detected error.

Flashing Indicates that the CANopen bus is not valid.

1 flash per second

2 flashes per second

Indicates that the CANopen bus is stopped.

Indicates that the controller has detected that the maximum number of error frames has been reached or exceeded.

Indicates that the controller has detected either a Node Guarding or a Heartbeat event.

NOTE: All the LEDs flash when the logic controller is being identified. For more details, refer to the EcoStruxure Machine Expert Programming Guide.

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TM251MESC

Dimensions

This figures shows the external dimensions of the logic controller:

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Modicon M251 Logic Con troller

TM251MESE

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TM251MESE

Chapter 5

TM251MESE

TM251MESE Presentation

Description

This figure shows the different components of the TM251MESE logic controller:

N° Description Refer to

1 Dual port Ethernet switch Ethernet port

2 Ethernet port 2 Ethernet ports

3 Serial line port / Type RJ45 (RS-232 or RS-485) Serial Line

4 Run/Stop switch Run/Stop

(see page 101)

(see page 103)

(see page 106)

(see page 48)

5 Status LEDs –

6 TM4 bus connector TM4 Expansion Modules

7 TM3/TM2 bus connector TM3 Expansion Modules

8 SD card slot SD Card

9 USB mini-B programming port / For terminal connection to a

programming PC (EcoStruxure Machine Expert)

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USB Mini-B Programming Port

(see page 105)

(see page 49)

(see page 37)

(see page 27)

Page 92

TM251MESE

N° Description Refer to

10 Surface mounting lugs –

11 Clip-on lock for 35 mm (1.38 in.) top hat section rail (DIN-rail) Top Hat Section Rail

12 24 Vdc power supply DC Power supply Characteristics and

Wiring

(see page 78)

13 Protective cover (SD card slot and USB mini-B programming

port)

14 Locking hook (Hook not included) –

15 Battery holder Real Time Clock (RTC)

–

(see page 66)

(see page 44)

Status LEDs

This figure shows the status LEDs:

The following table describes the system status LEDs:

Label Function

Type

PWR Power Green On Indicates that power is applied.

RUN Machine

status

Color Status Description

Off Indicates that power is removed.

Green On Indicates that the controller is running a valid application.

Flashing Indicates that the controller has a valid application that is

stopped.

1 flash Indicates that the controller has paused at BREAKPOINT.

Off Indicates that the controller is not programmed

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TM251MESE

Label Function

Type

ERR Internal Error Red On Indicates that an operating system error has been detected

I/O I/O error Red On Indicates device errors on the serial line, SD car d, T M4 b us,

SD SD card

access

BAT Battery Red On Indicates that the battery needs to be replaced.

ETH.1 ETH.2

SL Serial line Green On Indicates the status of serial line

TM4 Error on TM4

Ethernet port status

bus

Color Status Description

Fast flashing Indicates that the controller has detected an internal error

Slow flashing Indicates either that a minor error has been detected if RUN

is ON or that no application has been detected

TM3 bus, Ethernet port(s) or CANopen port.

Green On Indicates that the SD card is being accessed

Flashing Indicates that the battery charge is low.

Green On Indicates that the Ethernet port is connected and the IP

address is defined.

3 flashes Indicates that the Ethernet port is not connected.

4 flashes Indicates that the IP address is already in use.

5 flashes Indicates that the module is waiting for BOOTP or DHCP

sequence.

6 flashes Indicates that the configured IP address is not valid.

(see page 108)

Off Indicates no serial communication

Red On Indicates that an error has been detected on the TM4 bus

Off Indicates that no error has been detected on the TM4 bus

NOTE: All the LEDs flash when the logic controller is being identified. For more details, refer to the EcoStruxure Machine Expert Programming Guide.

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TM251MESE

Dimensions

This figure shows the external dimensions of the logic controller:

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Modicon M251 Logic Con troller

Modicon M251 Logic Controller Communication

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Modicon M251 Logic Controller Communication

Part III

Modicon M251 Logic Controller Communication

What Is in This Part?

This part contains the following chapters:

Chapter Chapter Name Page

6 Integrated Communication Ports 97

7 Connecting the M251 Logic Controller to a PC 109

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Modicon M251 Logic Controller Communication

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Modicon M251 Logic Con troller

Integrated Communication Ports

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Integrated Communication Ports

Chapter 6

Integrated Communication Ports

What Is in This Chapter?

This chapter contains the following topics:

CAN Port 98

Ethernet Port 101

TM251MESE Specific Considerations 103

USB Mini-B Programming Port 105

Serial Line 106

Topic Page

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Integrated Communication Ports

CAN Port

CANopen Capabilities

The Modicon M251 Logic Controller CANopen master has the following features:

Feature Description

Maximum number of slaves on the bus 63 CANopen slave devices

Maximum length of CANopen fieldbus cables According to the CAN specification (see Transmission

Maximum number of PDOs managed by the master 252 TPDOs + 252 RPDOs

For each additional CANopen slave:

 the application size increases by an average of 10 kbytes, which conceivably could result in

exceeding memory limits.

 the configuration initialization time at the startup increases, which conceivably could result in

watchdog timeout.

Although EcoStruxure Machine Expert does not restrict you from doing so, do not exceed more than 63 CANopen slave modules (and/or 252 TPDOs and 252 RPDOs) in order to have a sufficient performance tolerance and avoid any performance degradation.

UNINTENDED EQUIPMENT OPERATION

Do not connect more than 63 CANopen slave devices to the controller to avoid system overload watchdog condition.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Speed and Cable Length

WARNING

(see page 100)

NOTICE

DEGRADATION OF PERFORMANCE

Do not exceed more than 252 TPDOs and 252 RPDOs for the Modicon M251 Logic Controller.

Failure to follow these instructions can result in equipment damage.

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J1939 Capabilities

The Modicon M251 Logic Controller J1939 master has the following features:

Feature Description

Maximum number of ECUs (slaves) on the bus

Maximum length of J1939 fieldbus cables According to the CAN specification (see Transmission Speed

Maximum number of PGNs managed by the master

For each additional ECU with approximately 10 configured (single frame) Parameter Group Numbers (PGNs):

 the application size increases by an average of 15 Kbytes. This figure includes the memory

consumed by implicitly-generated variables for configured Suspected Parameter Numbers (SPNs). This application size increase could result in exceeding memory limits.

 the number of input bits (%I) used on the logic controller increases in proportion to the number

and size of PGNs configured as "TX Signals" in a non-local ECU or "RX Signals" in a local ECU.

 the number of output bits (%Q) used on the logic controller increases in proportion to the number

and size of PGNs configured as "TX Signals" in a local ECU.

NOTE: Thoroughly test your application regarding the number of configured J1939 ECUs connected to the controller, and the number of PGNs configured on each ECU, to avoid a system overload watchdog condition or performance degradation.

For more information, refer to J1939 Interface Configuration

Programming Guide)

Integrated Communication Ports

Limited only by the address range of 0...253 for Electronic Control Units (ECUs).

and Cable Length must be configured to run at 250 Kbps.

Given implicitly by the maximum number of input bits (%I) and output bits (%Q) available on the Modicon M251 Logic Controller: 4096 input bits and 4096 output bits. This results in a maximum of 512 single-packet PGNs (most PGNs are single-packet, containing 8 bytes of data).

(see page 100)

). For J1939, the CAN bus

(see Modicon M251 Logic Controller,

CAN Wiring Diagram

The CAN plug is a male sub-D9 terminal block:

* To be connected externally to the protective earth

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Integrated Communication Ports

Pin Signal Description

1– Reserved

2 CAN_L CAN_L bus line

3 CAN_GND CAN ground

4– Reserved

5 (CAN_SHLD) Optional CAN shield

6 GND Ground

7 CAN_H CAN_H bus line

8– Reserved

9 (CAN_V+) Optional CAN external positive supply

UNINTENDED EQUIPMENT OPERATION

Do not connect wires to unused terminals and/or terminals indicated as “No Connection (N.C.)”.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Transmission Speed and Cable Length

Transmission speed is limited by the bus length and the type of cable used.

The following table describes the relationship between the maximum transmission speed and the bus length (on a single CAN segment without a repeater):

WARNING

100

Maximum transmission baud rate Bus length

1000 Kbps 20 m (65 ft)

800 Kbps 40 m (131 ft)

500 Kbps 100 m (328 ft)

250 Kbps 250 m (820 ft)

125 Kbps 500 m (1,640 ft)

50 Kbps 1000 m (3280 ft)

20 Kbps 2500 m (16,400 ft)

NOTE: The CAN cable must be shielded.

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Schneider Electric M251 Hardware Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Modicon M251 Logic C ontroller

Table of Contents

Safety Information

About the Book

Modicon M251 Logic Con troller Introductio n

M251 General Overview

M251 Logic Controller Description

Maximum Hardware Configuration

TM2 Expansion Modules

TM3 Expansion Modules

TM3 Bus Couplers

TM4 Expansion Modules

TM5 Fieldbus Interfaces

TM5 CANopen Fieldbus Interfaces

TM7 CANopen Fieldbus Interfaces

Accessories

M251 Features

Real Time Clock (RTC)

Run/Stop

SD Card

M251 Installation

M251 Logic Controller G eneral Rules for Implementing

Environmental Characteristics

Certifications and Standards

M251 Logic Controller Installation

Installation and Maintenance Requirements

M251 Logic Controller Mounting Positions and Clearances

Top Hat Section Rail (DIN rail)

Installing and Removing the Controller with Expansions

Direct Mounting on a Panel Surface

M251 Electrical Requirements

Wiring Best Practices

DC Power Supply Characteristics and Wiring

Grounding the M251 System

Modicon M251 Logic Con troller

TM251MESC

TM251MESC Presentation

TM251MESE

TM251MESE Presentation

Modicon M251 Logic Controller Communication

Integrated Communication Ports

CAN Port