Rockwell Automation 1766-Lxxxx User Manual

User Manual

MicroLogix 1400 Programmable Controllers

Bulletin 1766 Controllers and 1762 Expansion I/O

Important User Information

IMPORTANT

Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety
Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/
important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference,
and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

available from

) describes some

WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death,
property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the
consequence

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
surfaces may reach dangerous temperatures.

Identifies information that is critical for successful application and understanding of the product.

Allen-Bradley, Rockwell Automation, MicroLogix, RSL inx, RSLogix 500 and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Summary of Changes

To help you find new and updated information in this release of the manual, we
have included change bars as shown to the right of this paragraph.

The table below lists the sections that document new features and additional or
updated information about existing features.

Summary of Changes

Topic Page

Viewing and changing of protocol configuration through LCD 59

MicroLogix 1400 LCD Menu Structure Tree updated with Protocol Configuration 60

Protocol Configuration step-by-step guide 116

Firmware Revision History

Features are added to the controllers through firmware upgrades. See the latest
release notes, 1766-RN001
level you need. Firmware upgrades are not required, except to allow you access to
the new features. You can only upgrade firmware within the same series of
controller.

, to be sure that your controller’s firmware is at the

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 iii

Summary of Changes

Notes:

iv Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Table of Contents

Summary of Changes

Hardware Overview

Install Your Controller

Firmware Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Preface

Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Common Techniques Used in this Manual. . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 1

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Component Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MicroLogix 1400 Memory Module and Built-in Real-Time Clock. . 2

1762 Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 2

Agency Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Disconnecting Main Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Periodic Tests of Master Control Relay Circuit . . . . . . . . . . . . . . . . . 11

Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Isolation Transformers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Power Supply Inrush. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Loss of Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Input States on Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Other Types of Line Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Preventing Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Master Control Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Using Emergency-Stop Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Schematic (Using IEC Symbols) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Schematic (Using ANSI/CSA Symbols). . . . . . . . . . . . . . . . . . . . . . . . 16

Installing a Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Using the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Connecting the Battery Wire Connector . . . . . . . . . . . . . . . . . . . . . . . 19

Controller Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Controller and Expansion I/O Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mounting the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 v

Table of Contents

DIN Rail Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1762 Expansion I/O Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Mounting 1762 Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

DIN Rail Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Connecting Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Chapter 3

Wire Your Controller

Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Wiring Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Wire without Spade Lugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Wire with Spade Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Using Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Recommended Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Grounding the Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Terminal Block Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Sinking and Sourcing Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA,

1766-L32AWAA, 1766-L32BXBA Wiring Diagrams . . . . . . . . . . . 36

Controller I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Minimizing Electrical Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Wiring Your Analog Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Analog Channel Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Minimizing Electrical Noise on Analog Channels . . . . . . . . . . . . . . . 41

Grounding Your Analog Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Expansion I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Digital Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Analog Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Chapter 4

Communication Connections

vi Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Supported Communication Protocols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Default Communication Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Using the Communications Toggle Functionality . . . . . . . . . . . . . . . . . . . 60

Changing Communication Configuration . . . . . . . . . . . . . . . . . . . . . . 61

Connecting to the RS-232 Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Making a DF1 Point-to-Point Connection. . . . . . . . . . . . . . . . . . . . . . 64

Using a Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Connecting to a DF1 Half-Duplex Network . . . . . . . . . . . . . . . . . . . . 68

Connecting to a RS-485 Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

DH-485 Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

DH-485 Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Table of Contents

Connecting the Communication Cable to the DH-485 Connector. .
74

Grounding and Terminating the DH-485 Network . . . . . . . . . . . . . 75

Connecting the AIC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Cable Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Recommended User-Supplied Components . . . . . . . . . . . . . . . . . . . . 80

Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Install and Attach the AIC+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Powering the AIC+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Connecting to DeviceNet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Cable Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Connecting to Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Ethernet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Chapter 5

Using the LCD

Operating Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Main Menu and Default Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Operating Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Using Menus to Choose Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Selecting Between Menu Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Cursor Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Setting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Viewing I/O Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Monitor User Defined Target Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Target User Defined File Number (TUF) . . . . . . . . . . . . . . . . . . . . . . 97

Monitoring a Bit File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Monitoring Integer Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Monitoring Double Integer files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Monitor Floating point Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Monitor System Status Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Using the Mode Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Controller Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Changing Mode Switch Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Using a User Defined LCD Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

User Defined LCD Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Configuring Advanced Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Changing Key In Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Key In Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Changing Key In Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Using Communications Toggle Functionality . . . . . . . . . . . . . . . . . . . . . 122

Ethernet Network Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Viewing Ethernet Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Configuring the IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Configuring the Ethernet Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 vii

Table of Contents

Configuring Ethernet Protocol Setup. . . . . . . . . . . . . . . . . . . . . . . . . . 130

Using Trim Pots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Trim Pot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Changing Data Value of a Trim Pot . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Trim Pot Configuration in LCD Function File . . . . . . . . . . . . . . . . 135

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Viewing System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Viewing Fault Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Saving/Loading Communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . 138

Saving Communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Loading communication EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

LCD setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Configuring contrast value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Configuring the backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Protocol Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Modbus RTU Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Chapter 6

Using Real-Time Clock and
Memory Modules

Online Editing

Real-Time Clock Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Operation at Power-up and Entering a Run or Test Mode. . . . . . . 147

Writing Data to the Real-Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . 147

RTC Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Memory Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

User Program , User Data, Datalog and Recipe Back-up. . . . . . . . . 149

Program Compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Data File Download Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Memory Module Write Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Removal/Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Memory Module Information File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Program /Data Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Program /Data Upload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Chapter 7

Directions and Cautions for MicroLogix 1400 Online

Editing User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

A Download is Required Before Starting Online Editing . . . . . . . . 151

Types of Online Editing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Edit Functions in Runtime Online Editing. . . . . . . . . . . . . . . . . . . . . 153

Edit Functions in Program Online Editing. . . . . . . . . . . . . . . . . . . . . 153

Appendix A

Specifications

viii Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Specifications for Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Specifications for Outputs in Hazardous Locations

(Class 1, Division 2, Groups A, B, C, D) . . . . . . . . . . . . . . . . . . . . . . . 157

Table of Contents

Specifications for Outputs in (Non-Hazardous) Locations only 158

Working Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Expansion I/O Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Digital I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Appendix B

Replacement Parts

Troubleshooting Your System

MicroLogix 1400 Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Lithium Battery (1747-BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Battery Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Appendix C

Understanding the Controller Status Indicators . . . . . . . . . . . . . . . . . . . 185

Controller Status LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Status Indicators on the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

I/O Status Indicators on the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Controller Error Recovery Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Analog Expansion I/O Diagnostics and Troubleshooting. . . . . . . . . . . 190

Module Operation and Channel Operation . . . . . . . . . . . . . . . . . . . 190

Power-up Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Critical and Non-Critical Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Module Error Definition Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Calling Rockwell Automation for Assistance . . . . . . . . . . . . . . . . . . . . . . 193

Appendix D

Using ControlFLASH to Upgrade
Your Operating System

Preparing for Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Install ControlFLASH Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Prepare the Controller for Firmware Upgrade . . . . . . . . . . . . . . . . . 196

Using ControlFLASH for Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . 197

ControlFLASH Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Missing or Corrupt OS state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Recovering from Missing or Corrupt OS State . . . . . . . . . . . . . . . . . 210

Appendix E

Connecting to Networks via RS­232/RS-485 Interface

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 ix

RS-232 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

RS-485 Communication Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

DF1 Full-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Table of Contents

DF1 Half-Duplex Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

DF1 Half-Duplex Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Considerations When Communicating as a DF1 Slave

on a Multi-drop Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Using Modems with MicroLogix Programmable Controllers . . . . 214

DH-485 Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

DH-485 Configuration Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Devices that use the DH-485 Network . . . . . . . . . . . . . . . . . . . . . . . . 216

Important DH-485 Network Planning Considerations . . . . . . . . . 217

Example DH-485 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Modbus Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Distributed Network Protocol (DNP3) . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Appendix F

MicroLogix 1400 Distributed
Network Protocol (DNP3)

Channel Configuration for DNP3 Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Channel 0 and Channel 2 Link Layer Configuration. . . . . . . . . . . . 227

Channel 1 Link Layer Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 228

DNP3 Slave Application Layer Configuration . . . . . . . . . . . . . . . . . 230

Channel 0 and Channel 2 Link Layer Configuration Parameters. 232

Channel 1(Ethernet) Link Layer Configuration Parameters . . . . . 236

DNP3 Slave Application Layer Configuration Parameters. . . . . . . 241

DNP3 Slave Application Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Internal Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

DNP3 Objects and MicroLogix 1400 Data Files . . . . . . . . . . . . . . . . . . . 260

DNP3 Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

DNP 3 Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

DNP3 Binary Input Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

DNP3 Binary Output Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

DNP3 Double Bit Binary Input Object. . . . . . . . . . . . . . . . . . . . . . . . 274

DNP3 Counter Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

DNP3 Frozen Counter Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

DNP3 Analog Input Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

DNP3 Analog Output Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

DNP3 BCD Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

DNP3 Data Set Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

Object Quality Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

DNP3 Device Attribute Object. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Event Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Generating Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Control Generating Event. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Reporting Event By Polled Response . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Reporting Event By Unsolicited Response . . . . . . . . . . . . . . . . . . . . . 313

Collision Avoidance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

x Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Table of Contents

Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Download a User Program via DNP3 Network . . . . . . . . . . . . . . . . . . . . 317

Default Directories and Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

Generating *.IMG files using RSLogix 500/RSLogix Micro . . . . . 318

Rules for File Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

Rules for Downloading a User Program . . . . . . . . . . . . . . . . . . . . . . . 321

Rules for Uploading a User Program . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Rules for Initializing a User Program . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Rules for uploading Communication Status Files. . . . . . . . . . . . . . . 324

Starting and Stopping User Programs (Mode Change) via DNP3

Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Initialize User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Start User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Stop User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Diagnostics for Ethernet Channel (Channel 1). . . . . . . . . . . . . . . . . 332

Diagnostics for Secure Authentication . . . . . . . . . . . . . . . . . . . . . . . . 339

Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Implementation Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Connecting to Networks via
Ethernet Interface

Appendix G

MicroLogix 1400 Controllers and Ethernet Communication . . . . . . . 355

MicroLogix 1400 Performance Considerations . . . . . . . . . . . . . . . . . . . . 356

MicroLogix 1400 and PC Connections to the

Ethernet Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

Ethernet Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

Connecting an Ethernet switch on the Ethernet Network. . . . . . . 357

Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358

Ethernet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360

Duplicate IP address Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361

Configuring the Ethernet Channel on the MicroLogix 1400 . . . . . . . . 362

Configuration Using RSLogix 500/RSLogix Micro Programming

Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

Configuration Via BOOTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

Using the Rockwell Automation BOOTP/DHCP Utility . . . . . . 365

Using a DHCP Server To Configure Your Processor . . . . . . . . . . . . . . . 367

Using Subnet Masks and Gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

Manually Configuring Channel 1 for Controllers on

Subnets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

MicroLogix 1400 Embedded Web Server Capability . . . . . . . . . . . . . . . 369

Appendix H

System Loading and Heat
Dissipation

Rockwell Automation Publication 1766-UM001H-EN-E - May 2014 xi

System Loading Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371

System Loading Example Calculations . . . . . . . . . . . . . . . . . . . . . . . . 372

System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Table of Contents

Current Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Calculating Heat Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Glossary

Index

xii Rockwell Automation Publication 1766-UM001H-EN-E - May 2014

Preface

Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:

• who should use this manual

• the purpose of this manual

• related documentation

• conventions used in this manual

• Rockwell Automation support

Who Should Use this Manual

Purpose of this Manual

Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use MicroLogix 1400 controllers.

You should have a basic understanding of electrical circuitry and familiarity with
relay logic. If you do not, obtain the proper training before using this product.

This manual is a reference guide for MicroLogix 1400 controllers and expansion
I/O. It describes the procedures you use to install, wire, and troubleshoot your
controller. This manual:

• explains how to install and wire your controllers

• gives you an overview of the MicroLogix 1400 controller system

Refer to publication 1766-RM001
Instruction Set Reference Manual for the MicroLogix 1400 instruction set and
for application examples to show the instruction set in use. Refer to your
RSLogix 500/RSLogix Micro programming software user documentation for
more information on programming your MicroLogix 1400 controller.

, MicroLogix 1400 Programmable Controllers

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 xv

Preface

Related Documentation

The following documents contain additional information concerning Rockwell
Automation products. To obtain a copy, contact your local
Rockwell Automation office or distributor.

Resource Description

MicroLogix 1400 Programmable Controllers Instruction Set
Reference Manual 1766-RM001

MicroLogix 1400 Programmable Controllers Installation
Instructions 1766 -IN001

Information on the MicroLogix 1400 Controllers instruction set.

Information on mounting and wiring the MicroLogix 1400 Controllers, including a
mounting template for easy installation.

Advanced Interface Converter (AIC+) User Manual

1761-UM004

DeviceNet Interface User Manual 1761-UM005

DF1 Protocol and Command Set Reference Manual 1770-6.5.16

Modbus Protocol Specifications Available from

www.modbus.org

Distributed Network Protocol(DNP3) Specifications Available
from www.dnp.org

Allen-Bradley Programmable Controller Grounding and Wiring
Guidelines 1770-4.1

Application Considerations for Solid-State Controls SGI-1.1

National Electrical Code - Published by the National Fire
Protection Association of Boston, MA.

Allen-Bradley Publication Index SD499 A complete listing of current documentation, including ordering instructions. Also

Allen-Bradley Industrial Automation Glossary AG-7.1

Common Techniques Used in this Manual

The following conventions are used throughout this manual:

• Bulleted lists such as this one provide information, not procedural steps.

A description on how to install and connect an AIC+. This manual also contains
information on network wiring.

Information on how to install, configure, and commission a DNI.

Information on DF1 open protocol.

Information about the Modbus protocol.

Information about the Distributed Network Protocol.

In-depth information on grounding and wiring Allen-Bradley programmable controllers.

A description of important differences between solid-state programmable controller
products and hard-wired electromechanical devices.

An article on wire sizes and types for grounding electrical equipment.

indicates whether the documents are available on CD-ROM or in multi-languages.

A glossary of industrial automation terms and abbreviations.

• Numbered lists provide sequential steps or hierarchical information.

• Italic type is used for emphasis.

xvi Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Hardware Overview

1

4451544514

Left side view Top view

Chapter

1

Hardware Features

The Bulletin 1766, MicroLogix 1400 programmable controller contains a power
supply, input and output circuits, a processor, an isolated combination
RS-232/485 communication port, an Ethernet port, and a non-isolated RS-232
communication port. Each controller supports 32 discrete I/O points(20 digital
inputs, 12 discrete outputs) and 6 analog I/O points(4 analog inputs and 2 analog
outputs : 1766-L32BWAA, 1766-AWAA and 1766-BXBA only).

The hardware features of the controller are shown below.

1

256 7

43

ESC

OK

9101113 12

Description

1 Comm port 2 - 9-pin D-Shell RS-232C connector

2 Memory module (refer to MicroLogix 1400 Memory Module Installation Instructions, publication 1766-IN010A

memory module).

3 User 24V (for 1766-BWA and 1766-BWAA only)

4 Input terminal block

5 LCD Display Keypad (ESC, OK, Up, Down, Left, Right)

6 Battery compartment

7 1762 expansion bus connector

8 Battery connector

9 Output terminal block

10 LCD Display

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 1

8

for instructions on installing the

Chapter 1 Hardware Overview

Description

11 Indicator LED panel

12 Comm port 1 - RJ45 connector

13 Comm port 0 - 8-pin mini DIN RS-232C/RS-485 connector

Controller Input and Output Description

Catalog Number Description

Input
Power

1766-L32BWA 100/240V AC 24V DC 12 Fast 24V DC Inputs

1766-L32AWA None 20 120V AC Inputs

1766-L32BXB 24V DC 12 Fast 24V DC Inputs

1766-L32BWAA 100/240V AC 24V DC 12 Fast 24V DC Inputs

1766-L32AWAA None 20 120V AC Inputs

1766-L32BXBA 24V DC 12 Fast 24V DC Inputs

(1)

Isolated RS-232/RS-485 combo port.

(2)

Non-isolated RS-232. Standard D-sub connector

User
Power

Embedded
Discrete I/O

8 Normal 24V DC Inputs
12 Relay Outputs

12 Relay Outputs

8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs

8 Normal 24V DC Inputs
12 Relay Outputs

12 Relay Outputs

8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs

Embedded
Analog I/O

None 1 RS232/RS485

4 Voltage Inputs
2 Voltage
Outputs

Comm. Ports

1 Ethernet

(2)

1 RS232

(1)

Component Descriptions

MicroLogix 1400 Memory Module and Built-in Real-Time Clock

The controller has a built-in real-time clock to provide a reference for
applications that need time-based control.

The controller is shipped with a memory module port cover in place. You can
order a memory module, 1766-MM1, as an accessory. The memory module
provides optional backup of your user program and data, and is a means to
transport your programs between controllers.

The program and data in your MicroLogix 1400 is non-volatile and is stored
when the power is lost to the controller. The memory module provides additional
backup that can be stored separately. The memory module does not increase the
available memory of the controller.

2 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 1 - 1766-MM1 Memory Module

TIP

M

o

d

u

l

e

M

e

m

o

ry

44536

1762 Expansion I/O 1762 Expansion I/O Connected to MicroLogix 1400 Controller

4456344581

1762 Expansion I/O

Hardware Overview Chapter 1

1762 expansion I/O can be connected to the MicroLogix 1400 controller, as
shown below.

Figure 2 - 1762 Expansion I/O

Expansion I/O

Catalog Number Description

Digital

1762-IA8 8-Point 120V AC Input Module

1762-IQ8 8-Point Sink/Source 24V DC Input Module

1762-IQ16 16-Point Sink/Source 24V DC Input Module

1762-IQ32T 32-Point Sink/Source 24V DC Input Module

1762-OA8 8-Point 120/240V AC Triac Output Module

1762-OB8 8-Point Sourcing 24V DC Output Module

A maximum of seven I/O modules, in any combination, can be
connected to a controller. See Appendix H to determine how much
heat a certain combination generates.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 3

Chapter 1 Hardware Overview

Expansion I/O

Catalog Number Description

1762-OB16 16-Point Sourcing 24V DC Output Module

1762-OB32T 32-Point Sourcing 24V DC Output Module

1762-OV32T 32-Point Sinking 24V DC Output Module

1762-OW8 8-Point AC/DC Relay Output Module

1762-OW16 16-Point AC/DC Relay Output Module

1762-OX6I 6-Point Isolated AC/DC Relay Output Module

1762-IQ8OW6 8-Point Sink/Source 24V DC Input and 6-Point AC/DC Relay Output

Module

Analog

1762-IF4 4-Channel Voltage/Current Analog Input Module

1762-OF4 4-Channel Voltage/Current Analog Output Module

1762-IF2OF2 Combination 2-Channel Input 2-Channel Output Voltage/Current

Analog Module

Temperature

1762-IR4 4-Channel RTD/Resistance Input Module

1762-IT4 4-Channel Thermocouple/mV Input Module

Communication Cables

Use only the following communication cables with the MicroLogix 1400
controllers. These cables are required for Class I Div. 2 applications.

• 1761-CBL-AM00 Series C or later

• 1761-CBL-AP00 Series C or later

• 1761-CBL-PM02 Series C or later

• 1761-CBL-HM02 Series C or later

• 2707-NC9 Series C or later

• 1763-NC01 Series A or later

• 1747-CP3 Series A or later

ATTENTION: UNSUPPORTED CONNECTION
Do not connect a MicroLogix 1400 controller to another MicroLogix
family controller such as MicroLogix 1000, MicroLogix 1200,
MicroLogix 1500, or the network port of a 1747-DPS1 Port Splitter
using a 1761-CBL-AM00 (8-pin mini-DIN to 8-pin mini-DIN) cable or
equivalent.
This type of connection will cause damage to the RS-232/485
communication port (Channel 0) of the MicroLogix 1400 and/or the
controller itself. The communication pins used for RS-485
communications on the MicroLogix 1400 are alternately used for
24V power on the other MicroLogix controllers and the network
port of the 1747-DPS1 Port Splitter.

Programming

Programming the MicroLogix 1400 controller is done using
RSLogix 500/RSLogix Micro, Revision 8.10.00 or later for Series A controllers

4 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Hardware Overview Chapter 1

and 8.30.00 or later for Series B controllers. Communication cables for
programming are available separately from the controller and software.

Communication Options

The MicroLogix 1400 controllers provide three communications ports, an
isolated combination RS-232/485 communication port (Channel 0), an
Ethernet port (Channel 1) and a non-isolated RS-232 communication port
(Channel 2).

The Channel 0 and Channel 2 ports on the MicroLogix 1400 can be connected
to the following:

• operator interfaces, personal computers, etc. using DF1 Full Duplex
point-to-point

• a DH-485 network

• a DF1 Radio Modem network

• a DF1 half-duplex network as an RTU Master or RTU Slave

• a Modbus network as an RTU Master or RTU Slave

• an ASCII network

• a DeviceNet network as a slave or peer using a DeviceNet Interface

(catalog number 1761-NET-DNI)

• an Ethernet network using the Ethernet Interface module (catalog number
1761-NET-ENI, or 1761-NET-ENIW)

• a DNP3 network as a Slave

When connecting to RS-485 network using DH-485, DF1 Half-Duplex
Master/Slave, Modbus RTU Master/Slave or DNP3 Slave protocols, the
MicroLogix 1400 can be connected directly via Channel 0 without an Advanced
Interface Converter, catalog number 1761-NET-AIC. The Channel 0 combo
port provides both RS-232 and RS-485 isolated connections. The appropriate
electrical interface is selected through your choice of communication cable. The
existing MicroLogix 1761 communication cables provide an interface to the
RS-232 drivers. The 1763-NC01 cable provides an interface to the RS-485
drivers.

The controller may also be connected to serial devices, such as bar code readers,
weigh scales, serial printers, and other intelligent devices, using ASCII. See
Default Communication Configuration on page 60 for the configuration settings
for Channel 0. MicroLogix 1400 can be connected directly to RS-485 network
via channel 0, using ASCII.

The MicroLogix 1400 supports EtherNet/IP communication via the Ethernet
communication Channel 1. In addition, either Modbus TCP or DNP3 over IP
can be enabled for Channel 1. You can connect your controller to a local area
network that provides communication between various devices at 10 Mbps or
100 Mbps. This port supports CIP explicit messaging (message exchange) only.
The controller cannot be used for CIP implicit messaging (real-time I/O
messaging). The controller also includes an embedded web server which allows

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 5

Chapter 1 Hardware Overview

viewing of not only module information, TCP/IP configuration, and diagnostic
information, but also includes the data table memory map and data table monitor
screen using a standard web browser.

See Chapter 4 for more information on connecting to the available
communication options.

6 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Chapter

2

Install Your Controller

This chapter shows you how to install your controller. The only tools you require
are a flat or Phillips head screwdriver and drill. Topics include:

• agency certifications

• compliance to European Union Directives

• installation considerations

• safety considerations

• power considerations

• preventing excessive heat

• master control relay

• installing a memory module

• using the battery

• controller mounting dimensions

• controller and expansion I/O spacing

• mounting the controller

• mounting 1762 expansion I/O

• connecting 1762 expansion I/O

Agency Certifications

Compliance to European Union Directives

• UL Listed Industrial Control Equipment for use in Class I, Division 2,
Hazardous Locations, Groups A, B, C, D

• CE marked for all applicable directives

• C-Tick marked for all applicable acts

• C-UL Listed Industrial Control Equipment for use in Canada

This product has the CE mark and is approved for installation within the
European Union and EEA regions. It has been designed and tested to meet the
following directives.

EMC Directive

This product is tested to meet Council Directive 2004/108/EC Electromagnetic
Compatibility (EMC) and the following standards, in whole or in part,
documented in a technical construction file:

• EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 7

Chapter 2 Install Your Controller

• EN 61131-2; Programmable Controllers (Clause 11)

• EN 61000-6-4

EMC - Part 6-4: Generic Standards - Emission Standard for Industrial
Environments

• EN 61000-6-2
EMC - Part 6-2: Generic Standards - Immunity for Industrial
Environments

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 2006/95/ECLow Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers, Part
2 - Equipment Requirements and Tests.

For specific information required by EN 61131-2, see the appropriate sections in
this publication, as well as the following Allen-Bradley publications:

• Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1

• Guidelines for Handling Lithium Batteries, publication AG-5.4

• Automation Systems Catalog, publication B115

Installation Considerations

Most applications require installation in an industrial enclosure (Pollution

(1)

Degree 2
Category II

) to reduce the effects of electrical interference (Over Voltage

(2)

) and environmental exposure. Locate your controller as far as
possible from power lines, load lines, and other sources of electrical noise such as
hard-contact switches, relays, and AC motor drives. For more information on
proper grounding guidelines, see the Industrial Automation Wiring and
Grounding Guidelines publication 1770-4.1

ATTENTION: Electrostatic discharge can damage semiconductor
devices inside the controller. Do not touch the connector pins or
other sensitive areas.

ATTENTION: Vertical mounting of the controller is not supported
due to heat build-up considerations.

(1)

Pollution Degree 2 is an environment where normally only non-conductive pollution occurs except that
occasionally temporary conductivity caused by condensation shall be expected.

(2)

Overvoltage Category II is the load level section of the electrical distribution system. At this level, transient
voltages are controlled and do not exceed the impulse voltage capability of the products insulation.

.

8 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

ATTENTION: Be careful of metal chips when drilling mounting
holes for your controller or other equipment within the enclosure or
panel. Drilled fragments that fall into the controller or I/O modules
could cause damage. Do not drill holes above a mounted controller
if the protective debris shields are removed or the processor is
installed.

WARNING: Do not place the MicroLogix 1400 Programmable
Controller in direct sunlight. Prolonged exposure to direct sunlight
could degrade the LCD display and have adverse effects on the
controller.
The controller is not designed for outdoor use.

Safety Considerations

Safety considerations are an important element of proper system installation.
Actively thinking about the safety of yourself and others, as well as the condition
of your equipment, is of primary importance. We recommend reviewing the
following safety considerations.

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to
use in hazardous locations.

WARNING: EXPLOSION HAZARD

• Substitution of components may impair suitability for Class I,
Division 2.

• Do not replace components or disconnect equipment unless power
has been switched off.

• Do not connect or disconnect components unless power has been
switched off.

• This product must be installed in an enclosure. All cables
connected to the product must remain in the enclosure or be
protected by conduit or other means.

• All wiring must comply with N.E.C. article 501-4(b).

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 9

Chapter 2 Install Your Controller

Use only the following communication cables in Class I, Division 2 hazardous
locations.

Environment Classification Communication Cables

Class I, Division 2 Hazardous Environment 1761-CBL-AC00 Series C or later

1761-CBL-AM00 Series C or later

1761-CBL-AP00 Series C or later

1761-CBL-PM02 Series C or later

1761-CBL-HM02 Series C or later

2707-NC9 Series C or later

1763-NC01 Series A or later

1747-CP3 Series

Disconnecting Main Power

WARNING: Explosion Hazard

Do not replace components, connect equipment, or disconnect
equipment unless power has been switched off.

The main power disconnect switch should be located where operators and
maintenance personnel have quick and easy access to it. In addition to
disconnecting electrical power, all other sources of power (pneumatic and
hydraulic) should be de-energized before working on a machine or process
controlled by a controller.

Safety Circuits

WARNING: Explosion Hazard

Do not connect or disconnect connectors while circuit is live.

Circuits installed on the machine for safety reasons, like overtravel limit switches,
stop push buttons, and interlocks, should always be hard-wired directly to the
master control relay. These devices must be wired in series so that when any one
device opens, the master control relay is de-energized, thereby removing power to
the machine. Never alter these circuits to defeat their function. Serious injury or
machine damage could result.

Power Distribution

There are some points about power distribution that you should know:

10 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

• The master control relay must be able to inhibit all machine motion by
removing power to the machine I/O devices when the relay is
de-energized. It is recommended that the controller remain powered even
when the master control relay is de-energized.

• If you are using a DC power supply, interrupt the load side rather than the
AC line power. This avoids the additional delay of power supply turn-off.
The DC power supply should be powered directly from the fused
secondary of the transformer. Power to the DC input and output circuits
should be connected through a set of master control relay contacts.

Periodic Tests of Master Control Relay Circuit

Any part can fail, including the switches in a master control relay circuit. The
failure of one of these switches would most likely cause an open circuit, which
would be a safe power-off failure. However, if one of these switches shorts out, it
no longer provides any safety protection. These switches should be tested
periodically to assure they will stop machine motion when needed.

Power Considerations

The following explains power considerations for the micro controllers.

Isolation Transformers

You may want to use an isolation transformer in the AC line to the controller.
This type of transformer provides isolation from your power distribution system
to reduce the electrical noise that enters the controller and is often used as a
step-down transformer to reduce line voltage. Any transformer used with the
controller must have a sufficient power rating for its load. The power rating is
expressed in volt-amperes (VA).

Power Supply Inrush

During power-up, the MicroLogix 1400 power supply allows a brief inrush
current to charge internal capacitors. Many power lines and control transformers
can supply inrush current for a brief time. If the power source cannot supply this
inrush current, the source voltage may sag momentarily.

The only effect of limited inrush current and voltage sag on the MicroLogix 1400
is that the power supply capacitors charge more slowly. However, the effect of a
voltage sag on other equipment should be considered. For example, a deep voltage
sag may reset a computer connected to the same power source. The following
considerations determine whether the power source must be required to supply
high inrush current:

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 11

Chapter 2 Install Your Controller

• The power-up sequence of devices in a system.

• The amount of the power source voltage sag if the inrush current cannot be

supplied.

• The effect of voltage sag on other equipment in the system.

If the entire system is powered-up at the same time, a brief sag in the power source
voltage typically will not affect any equipment.

Loss of Power Source

The power supply is designed to withstand brief power losses without affecting
the operation of the system. The time the system is operational during power loss
is called program scan hold-up time after loss of power. The duration of the
power supply hold-up time depends on the type and state of the I/O, but is
typically between 10 milliseconds and 3 seconds. When the duration of power
loss reaches this limit, the power supply signals the processor that it can no longer
provide adequate DC power to the system. This is referred to as a power supply
shutdown. The processor then performs an orderly shutdown of the controller.

Preventing Excessive Heat

Input States on Power Down

The power supply hold-up time as described above is generally longer than the
turn-on and turn-off times of the inputs. Because of this, the input state change
from “On” to “Off” that occurs when power is removed may be recorded by the
processor before the power supply shuts down the system. Understanding this
concept is important. The user program should be written to take this effect into
account.

Other Types of Line Conditions

Occasionally the power source to the system can be temporarily interrupted. It is
also possible that the voltage level may drop substantially below the normal line
voltage range for a period of time. Both of these conditions are considered to be a
loss of power for the system.

For most applications, normal convective cooling keeps the controller within the
specified operating range. Ensure that the specified temperature range is
maintained. Proper spacing of components within an enclosure is usually
sufficient for heat dissipation.

In some applications, a substantial amount of heat is produced by other
equipment inside or outside the enclosure. In this case, place blower fans inside

12 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

TIP

TIP

the enclosure to assist in air circulation and to reduce “hot spots” near the
controller.

Additional cooling provisions might be necessary when high ambient
temperatures are encountered.

Do not bring in unfiltered outside air. Place the controller in an
enclosure to protect it from a corrosive atmosphere. Harmful
contaminants or dirt could cause improper operation or damage to
components. In extreme cases, you may need to use air conditioning to
protect against heat build-up within the enclosure.

Master Control Relay

A hard-wired master control relay (MCR) provides a reliable means for
emergency machine shutdown. Since the master control relay allows the
placement of several emergency-stop switches in different locations, its
installation is important from a safety standpoint. Overtravel limit switches or
mushroom-head push buttons are wired in series so that when any of them opens,
the master control relay is de-energized. This removes power to input and output
device circuits. Refer to the figures on pages 15 and 16.

ATTENTION: Never alter these circuits to defeat their function
since serious injury and/or machine damage could result.

If you are using an external DC power supply, interrupt the DC output
side rather than the AC line side of the supply to avoid the additional
delay of power supply turn-off.

The AC line of the DC output power supply should be fused.

Connect a set of master control relays in series with the DC power
supplying the input and output circuits.

Place the main power disconnect switch where operators and maintenance
personnel have quick and easy access to it. If you mount a disconnect switch
inside the controller enclosure, place the switch operating handle on the outside
of the enclosure, so that you can disconnect power without opening the
enclosure.

Whenever any of the emergency-stop switches are opened, power to input and
output devices should be removed.

When you use the master control relay to remove power from the external I/O
circuits, power continues to be provided to the controller’s power supply so that
diagnostic indicators on the processor can still be observed.

The master control relay is not a substitute for a disconnect to the controller. It is
intended for any situation where the operator must quickly de-energize I/O
devices only. When inspecting or installing terminal connections, replacing

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 13

Chapter 2 Install Your Controller

TIP

TIP

output fuses, or working on equipment within the enclosure, use the disconnect
to shut off power to the rest of the system.

Do not control the master control relay with the controller. Provide
the operator with the safety of a direct connection between an
emergency-stop switch and the master control relay.

Using Emergency-Stop Switches

When using emergency-stop switches, adhere to the following points:

• Do not program emergency-stop switches in the controller program. Any
emergency-stop switch should turn off all machine power by turning off
the master control relay.

• Observe all applicable local codes concerning the placement and labeling
of emergency-stop switches.

• Install emergency-stop switches and the master control relay in your
system. Make certain that relay contacts have a sufficient rating for your
application. Emergency-stop switches must be easy to reach.

• In the following illustration, input and output circuits are shown with
MCR protection. However, in most applications, only output circuits
require MCR protection.

The following illustrations show the Master Control Relay wired in a grounded
system.

In most applications input circuits do not require MCR protection;
however, if you need to remove power from all field devices, you must
include MCR contacts in series with input power wiring.

14 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Schematic (Using IEC Symbols)

Disconnect

Isolation
Tr an sf or me r

Emergency-Stop
Push Button

Fuse MCR

230V AC
I/O
Circuits

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.

Fuse

Overtravel
Limit Switch

MCR

MCR

MCR

Stop Start

Line Terminals: Connect to terminals of Power
Supply (1766-L32AWA, 1766-L32AWAA,
1766-L32BWA, 1766-L32BWAA).

115V AC or
230V AC
I/O Circuits

L1

L2

230V AC

Master Control Relay (MCR)
Cat. No. 700-PK400A1

Suppressor
Cat. No. 700-N24

MCR

Suppr.

24V DC
I/O
Circuits

(Lo)

(Hi)

DC Power Supply.
Use IEC 950/EN 60950

X1 X2

115V AC
or 230V AC

Line Terminals: Connect to 24V DC terminals of
Power Supply (1766-L32BXB, 1766-L32BXBA)

_

+

44564

Install Your Controller Chapter 2

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 15

Chapter 2 Install Your Controller

Emergency-Stop
Push Button

230V AC

Operation of either of these contacts will
remove power from the external I/O
circuits, stopping machine motion.

Fuse MCR

Fuse

MCR

MCR

MCR

Stop

Start

Line Terminals: Connect to terminals of Power
Supply (1766-L32AWA, 1766-L32AWAA,
1766-L32BWA, 1766-L32BWAA).

Line Terminals: Connect to 24V DC terminals of
Power Supply (1766-L32BXB, 1766-L32BXBA).

230V AC
Output
Circuits

Disconnect

Isolation
Transformer

115V AC or
230V AC
I/O Circuits

L1

L2

Master Control Relay (MCR)
Cat. No. 700-PK400A1

Suppressor
Cat. No. 700-N24

(Lo)

(Hi)

DC Power Supply. Use
NEC Class 2 for UL
Listing

.

X1 X2

115V AC or
230V AC

_

+

MCR

24 V DC
I/O
Circuits

Suppr.

Overtravel
Limit Switch

44565

44534

Schematic (Using ANSI/CSA Symbols)

Installing a Memory Module

16 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

1. Remove the memory module port cover.

Install Your Controller Chapter 2

M

o

d

u

l

e

M

e

m

o

ry

44535

M

o

d

u

l

e

M

e

m

o

ry

44536

IMPORTANT

2. Align the connector on the memory module with the connector pins on
the controller.

3. Firmly seat the memory module into the controller.

Using the Battery

4. Use a screwdriver as in step 1 to remove the memory module in the future.

The MicroLogix 1400 controller is equipped with a replaceable battery (catalog
number 1747-BA). The Battery Low indicator on the LCD display of the
controller shows the status of the replaceable battery. When the battery is low, the
indicator is set (displayed as a solid rectangle). This means that either the battery
wire connector is disconnected, or the battery may fail within 2 weeks if it is
connected.

The MicroLogix 1400 controller ships with the battery wire connector
connected.
Ensure that the battery wire connector is inserted into the connector
port if your application needs battery power. For example, when using
a real-time clock (RTC).
Replacing the battery when the controller is powered down will lose
all user application memory. Replace the battery when the controller is
powered on.
Refer to the SLC 500 Lithium Battery Installation Instructions,

publication 1747-IN515, for more information on installation, handling,

usage, storage, and disposal of the battery.

See RTC Battery Operation on page 120, for more information on the
use of the battery in relation with RTC.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 17

Chapter 2 Install Your Controller

IMPORTANT

WARNING: When you connect or disconnect the battery an

electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that the area is nonhazardous before
proceeding.
For Safety information on the handling of lithium batteries, including
handling and disposal of leaking batteries, see Guidelines for Handling

Lithium Batteries, publication AG 5-4.

When the controller’s Battery Low indicator is set (displayed as a solid
rectangle) with the battery wire connector connected, you should
install a new battery immediately.

18 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

1762 I/O expansion
bus connector

Battery wires
twisted pair

Battery

Battery wire
connector

Battery connector

44522

Battery compartment

Connecting the Battery Wire Connector

Follow the procedure below to connect the battery wire connector to the battery
connector.

1. Insert the replaceable battery wire connector into the controller’s battery
connector.

2. Secure the battery connector wires so that it does not block the 1762
expansion bus connector as shown below

.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 19

Chapter 2 Install Your Controller

1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA,
1766-L32AWAA, 1766-L32BXBA

44516

ESC

OK

Top

Bottom

Side

44517

Controller Mounting Dimensions

C

A

Dimension Measurement

A 90 mm (3.5 in.)

B 180 mm (7.087 in.)

C 87 mm (3.43 in.)

B

Controller and Expansion I/O Spacing

Mounting the Controller

The controller mounts horizontally, with the expansion I/O extending to the
right of the controller. Allow 50 mm (2 in.) of space on all sides of the controller
system for adequate ventilation. Maintain spacing from enclosure walls, wireways,
adjacent equipment, and so on, as shown below.

MicroLogix 1400 controllers are suitable for use in an industrial environment
when installed in accordance with these instructions. Specifically, this equipment

20 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

TIP

debris strip

44513

is intended for use in clean, dry environments (Pollution degree 2
circuits not exceeding Over Voltage Category II

ATTENTION: Do not remove the protective debris shield until
after the controller and all other equipment in the panel near the
controller are mounted and wiring is complete. Once wiring is
complete, remove protective debris shield. Failure to remove shield
before operating can cause overheating.

ATTENTION: Electrostatic discharge can damage semiconductor
devices inside the controller. Do not touch the connector pins or
other sensitive areas.

(2)

(IEC 60664-1).

(1)

) and to

(3)

For environments with greater vibration and shock concerns, use the
panel mounting method described on page 23, rather than DIN rail
mounting.

(1)

Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that
occasionally a temporary conductivity caused by condensation shall be expected.

(2)

Over Voltage Category II is the load level section of the electrical distribution system. At this level transient
voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3)

Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)
designations.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 21

Chapter 2 Install Your Controller

A

B

C

44518

DIN Rail Mounting

The maximum extension of the latch is 14 mm (0.55 in.) in the open position.
A flat-blade screwdriver is required for removal of the controller. The
controller can be mounted to EN50022-35x7.5 or EN50022-35x15 DIN rails.
DIN rail mounting dimensions are shown below.

Dimension Height

A 90 mm (3.5 in.)

B 27.5 mm (1.08 in.)

C 27.5 mm (1.08 in.)

Follow this procedure to install your controller on the DIN rail.

1. Mount your DIN rail. (Make sure that the placement of the controller on
the DIN rail meets the recommended spacing requirements,
see Controller and Expansion I/O Spacing on page 20. Refer to the
mounting template inside the back cover of this document.)

2. Close the DIN latch, if it is open.

3. Hook the top slot over the DIN rail.

4. While pressing the controller down against the top of the rail, snap the

bottom of the controller into position.

5. Leave the protective debris shield attached until you are finished wiring the
controller and any other devices.

To remove your controller from the DIN rail:

1. Place a flat-blade screwdriver in the DIN rail latch at the bottom of the
controller.

2. Holding the controller, pry downward on the latch until the latch locks in
the open position.

3. Repeat steps 1 and 2 for the second DIN rail latch.

4. Unhook the top of the DIN rail slot from the rail.

22 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

open closed

44519

44520

ESC

OK

Mounting Template

44521

ESC

OK

Panel Mounting

Mount to panel using #8 or M4 screws. To install your controller using mounting
screws:

1. Remove the mounting template from inside the back cover of the
MicroLogix 1400 Programmable Controllers Installation Instructions,
publication 1766-IN001

.

2. Secure the template to the mounting surface. (Make sure your controller is
spaced properly. See Controller and Expansion I/O Spacing on page 20.)

3. Drill holes through the template.

4. Remove the mounting template.

5. Mount the controller.

6. Leave the protective debris shield in place until you are finished wiring the

controller and any other devices.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 23

Chapter 2 Install Your Controller

44567

1762 Expansion I/O Dimensions

A

C

B

Dimension Measurement

A 90 mm (3.5 in.)

B 40 mm (1.57 in.)

C 87 mm (3.43 in.)

Mounting 1762 Expansion I/O

ATTENTION: During panel or DIN rail mounting of all devices, be

sure that all debris such as metal chips and wire stands, is kept
from falling into the module. Debris that falls into the module could
cause damage when the module is under power.

DIN Rail Mounting

The module can be mounted using the following DIN rails:

• 35 x 7.5 mm (EN 50 022 - 35 x 7.5), or

• 35 x 15 mm (EN 50 022 - 35 x 15).

Before mounting the module on a DIN rail, close the DIN rail latch. Press the
DIN rail mounting area of the module against the DIN rail. The latch
momentarily opens and locks into place.

Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or
1492-EAH35) for vibration or shock environments. The following illustration
shows the location of the end anchors.

24 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Install Your Controller Chapter 2

TIP

TIP

End anchor

End anchor

44974

90
(3.54)

100.06
(3.939)

40.4
(1.59)

A

40.4
(1.59)

14.2
(0.568)

MicroLogix

1400

1762 I/O

1762 I/O

1762 I/O

For more than 2 modules: (number of modules - 1) x 40 mm (1.59 in.)

NOTE: All dimensions are in mm
(inches). Hole spacing tolerance:
±0.4 mm (0.016 in.).

A = 165 mm (6.497 in.)

44568

1762 expansion I/O must be mounted horizontally as illustrated.

For environments with greater vibration and shock concerns, use the
panel mounting method described below, instead of DIN rail
mounting.

Panel Mounting

Use the dimensional template shown below to mount the module. The preferred
mounting method is to use two M4 or #8 panhead screws per module. Mounting
screws are required on every module.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 25

Chapter 2 Install Your Controller

TIP

TIP

44975

Connecting Expansion I/O

The expansion I/O module is attached to the controller or another I/O module
by means of a flat ribbon cable after mounting, as shown below.

Use the pull loop on the connector to disconnect modules. Do not pull
on the ribbon cable.

Up to seven expansion I/O modules can be connected to a controller.

ATTENTION: Remove power before removing or inserting an I/O
module. When you remove or insert a module with power applied,
an electrical arc may occur. An electrical arc can cause personal
injury or property damage by:

• sending an erroneous signal to your system’s field devices,
causing the controller to fault

• causing an explosion in a hazardous environment

Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create electrical
resistance, reducing product reliability.

WARNING: EXPLOSION HAZARD
In Class I, Division 2 applications, the bus connector must be fully
seated and the bus connector cover must be snapped in place.

In Class I, Division 2 applications, all modules must be mounted in
direct contact with each other as shown on page 26. If DIN rail
mounting is used, an end stop must be installed ahead of the
controller and after the last 1762 I/O module.

26 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Chapter

TIP

Wire Your Controller

This chapter describes how to wire your controller and expansion I/O. Topics
include:

• wire requirements

• using surge suppressors

• grounding the controller

• wiring diagrams

• sinking and sourcing wiring diagrams

• controller I/O wiring

• wiring your analog channels

• expansion I/O wiring

3

Wiring Requirements

Wiring Recommendation

ATTENTION: Before you install and wire any device, disconnect

power to the controller system.

ATTENTION: Calculate the maximum possible current in each
power and common wire. Observe all electrical codes dictating the
maximum current allowable for each wire size. Current above the
maximum ratings may cause wiring to overheat, which can cause
damage.
United States Only: If the controller is installed within a potentially
hazardous environment, all wiring must comply with the requirements
stated in the National Electrical Code 501-10 (b).

• Allow for at least 50 mm. (2 in.) between I/O wiring ducts or terminal
strips and the controller.

• Route incoming power to the controller by a path separate from the device
wiring. Where paths must cross, their intersection should be
perpendicular.

Do not run signal or communications wiring and power wiring in the
same conduit. Wires with different signal characteristics should be
routed by separate paths.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 27

Chapter 3 Wire Your Controller

Finger-safe cover

44527

• Separate wiring by signal type. Bundle wiring with similar electrical
characteristics together.

• Separate input wiring from output wiring.

• Label wiring to all devices in the system. Use tape, shrink-tubing, or other

dependable means for labeling purposes. In addition to labeling, use
colored insulation to identify wiring based on signal characteristics. For
example, you may use blue for DC wiring and red for AC wiring.

Wire Requirements

Wire Type Wire Size (2 wire maximum per terminal screw)

1 wire per terminal 2 wire per terminal

Solid Cu-90°C (194°F) #12 to #20 AWG #16 to #20 AWG

Stranded Cu-90°C (194°F) #14 to #20 AWG #18 to #20 AWG

Wiring torque = 0.56 Nm (5.0 in-lb) rated

Wire without Spade Lugs

When wiring without spade lugs, it is recommended to keep the finger-safe covers
in place. Loosen the terminal screw and route the wires through the opening in
the finger-safe cover. Tighten the terminal screw making sure the pressure plate
secures the wire.

Wire with Spade Lugs

The diameter of the terminal screw head is 5.5 mm (0.220 in.). The input and
output terminals of the MicroLogix 1400 controller are designed for a 6.35 mm
(0.25 in.) wide spade (standard for #6 screw for up to 14 AWG) or a 4 mm
(metric #4) fork terminal.

28 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Wire Your Controller Chapter 3

Finger-safe cover

44528

+DC or L1

Suppression
Device

DC COM or L2

AC or DC
Outputs

Load

VAC/DC

Out 0
Out 1

Out 2

Out 3

Out 4

Out 5
Out 6

Out 7
COM

When using spade lugs, use a small, flat-blade screwdriver to pry the finger-safe
cover from the terminal blocks as shown below. Then loosen the terminal screw.

Using Surge Suppressors

Because of the potentially high current surges that occur when switching
inductive load devices, such as motor starters and solenoids, the use of some type
of surge suppression to protect and extend the operating life of the controllers
output contacts is required. Switching inductive loads without surge suppression
can significantly reduce the life expectancy of relay contacts. By adding a
suppression device directly across the coil of an inductive device, you prolong the
life of the output or relay contacts. You also reduce the effects of voltage
transients and electrical noise from radiating into adjacent systems.

The following diagram shows an output with a suppression device. We
recommend that you locate the suppression device as close as possible to the load
device.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 29

If the outputs are DC, we recommend that you use an 1N4004 diode for surge
suppression, as shown below. For inductive DC load devices, a diode is suitable. A
1N4004 diode is acceptable for most applications. A surge suppressor can also be

Chapter 3 Wire Your Controller

+24V DC

IN4004 Diode

Relay or Solid
State DC Outputs

24V DC common

VAC/DC

Out 0
Out 1

Out 2
Out 3
Out 4
Out 5

Out 6
Out 7
COM

(A surge suppressor
can also be used.)

Surge Suppression for Inductive AC Load Devices

Output Device Output DeviceOutput Device

Varistor

RC Network

Surge
Suppressor

used. See for recommended suppressors. As shown below, these surge
suppression circuits connect directly across the load device.

Suitable surge suppression methods for inductive AC load devices include a
varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below.
These components must be appropriately rated to suppress the switching
transient characteristic of the particular inductive device. See Recommended
Surge Suppressors on page 30 for recommended suppressors.

Recommended Surge Suppressors

Use the Allen-Bradley surge suppressors shown in the following table for use with
relays, contactors, and starters.

Recommended Surge Suppressors

Device Coil Voltage Suppressor Catalog Number Type

Bulletin 100/104K 700K 24…48V AC 100-KFSC50 RC

110…280V AC 100-KFSC280

380…480V AC 100-KFSC480

12…55 V AC, 12…77V DC 100-KFSV55 MOV

30 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

56…136 VAC, 78…180V DC 100-KFSV136

137…277V AC, 181…250 V DC 100-KFSV277

12…250V DC 100-KFSD250 Diode

(4)

Wire Your Controller Chapter 3

Recommended Surge Suppressors

Device Coil Voltage Suppressor Catalog Number Type

Bulletin 100C, (C09 - C97) 24…48V AC 100-FSC48

110…280V AC 100-FSC280

380…480V AC 100-FSC480

12…55V AC, 12…77V DC 100-FSV55

56…136V AC, 78…180V DC 100-FSV136

137…277V AC, 181…250V DC 100-FSV277

278…575V AC 100-FSV575

12…250V DC 100-FSD250

Bulletin 509 Motor Starter Size 0 - 5 12…120V AC 599-K04 MOV

240…264V AC 599-KA04

Bulletin 509 Motor Starter Size 6 12…120V AC 199-FSMA1

12…120V AC 199-GSMA1

Bulletin 700 R/RM Relay AC coil Not Required

24…48V DC 199-FSMA9 MOV

50…120V DC 199-FSMA10

130…250V DC 199-FSMA11

Bulletin 700 Type N, P, PK or PH Relay 6…150V AC/DC 700-N24 RC

24…48V AC/DC 199-FSMA9 MOV

50…120V AC/DC 199-FSMA10

130…250V AC/DC 199-FSMA11

6…300V DC 199-FSMZ-1 Diode

Miscellaneous electromagnetic devices

6…150V AC/DC 700-N24 RC

limted to 35 sealed VA

(1)

Catalog numbers for screwless terminals include the string ’CR’ after ’100-’.
For example: Cat. No. 100-FSC48 becomes Cat. No. 100-CRFSC48; Cat. No. 100-FSV55 becomes 100-CRFSV55; and so on.

(2)

For use on the interposing relay.

(3)

For use on the contactor or starter.

(4)

RC Type not to be used with Triac outputs.
Varistor is not recommended for use on the relay outputs.

(1)

(1)

(1)

(1)

(1)

(1)

(1)

(1)

(2)

(3)

RC

MOV

Diode

RC

MOV

(4)

Grounding the Controller

In solid-state control systems, grounding and wire routing helps limit the effects
of noise due to electromagnetic interference (EMI). Run the ground connection
from the ground screw of the controller to the ground bus prior to connecting
any devices. Use AWG #14 wire. For AC-powered controllers, this connection
must be made for safety purposes.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 31

Chapter 3 Wire Your Controller

TIP

Grounding stamping

44519

ATTENTION: All devices connected to the RS-232/485 communication port must be referenced to controller
ground, or be floating (not referenced to a potential other than ground). Failure to follow this procedure may result
in property damage or personal injury.

• For 1766-L32BWA and 1766-L32BWAA controllers, the COM of the sensor supply is also connected to chassis
ground internally. The 24V DC sensor power source should not be used to power output circuits. It should only be
used to power input devices.

• For 1766-L32BXB and 1766-L32BXBA controllers, the VDC NEUT or common terminal of the power supply is also
connected to chassis ground internally.

This product is intended to be mounted to a well grounded mounting surface
such as a metal panel. Refer to the Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1

, for additional information. Additional
grounding connections from the mounting tab or DIN rail, if used, are not
required unless the mounting surface cannot be grounded.

Use all four mounting positions for panel mounting installation.

Wiring Diagrams

ESC

OK

ATTENTION: Remove the protective debris strip before applying
power to the controller. Failure to remove the strip may cause the
controller to overheat.

The following illustrations show the wiring diagrams for the MicroLogix 1400
controllers. Controllers with DC inputs can be wired as either sinking or sourcing
inputs. (Sinking and sourcing does not apply to AC inputs.) Refer to Sinking and
Sourcing Wiring Diagrams on page 36.

The controller terminal block layouts are shown below. The shading on the labels
indicates how the terminals are grouped.

32 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

TIP

This symbol denotes a protective earth ground terminal which

IN1

IN0 IN2

IN3

COM 0

IV0(+) IV2(+)

COM 1

IV1(+) IV3(+)

IN5 IN7

IN4 IN6

COM 2

IN8 IN10

IN9 IN11

COM 3

IN13 IN15 IN17 IN19

IN12 IN14 IN16 IN18

COM
ANA

L1

DC0

OV1

OUT0

OUT1 OUT2 OUT3 OUT4

OUT5

OUT7 OUT8 OUT10

OUT6 OUT9 OUT11

OV0

VAC

L2/N

VAC

VAC

DC1
VAC

DC2
VAC

DC3

VAC

DC4
VAC

DC6
VAC

COM
ANA

DC5

VAC

Group 0 Group 1 Group 2 Group 3 Group 5Group 4 Group 6

Input Terminal Block

Output Terminal Block

44524

provides a low impedance path between electrical circuits and earth
for safety purposes and provides noise immunity improvement. This
connection must be made for safety purposes on AC-powered
controllers.

This symbol denotes a functional earth ground terminal which
provides a low impedance path between electrical circuits and earth
for non-safety purposes, such as noise immunity improvement.

Terminal Block Layouts

ATTENTION: When you connect or disconnect the Removable

Terminal Block (RTB) with field side power applied, an electrical arc
can occur. This could cause an explosion in hazardous location
installations. Be sure that power is removed or the area is
nonhazardous before proceeding.

Wire Your Controller Chapter 3

When used in a Class I, Division 2, hazardous location, this equipment
must be mounted in a suitable enclosure. All wiring must be in
accordance with Class I, Division 2 wiring methods of Article 501 of
the National Electrical Code and/or in accordance with Section 18-1J2
of the Canadian Electrical Code, and in accordance with the authority
having jurisdiction.

Figure 3 - 1766-L32BWA/L32BWAA

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 33

Chapter 3 Wire Your Controller

IN1

IN0 IN2

IN3

COM 0

IV0(+) IV2(+)

COM 1

IV1(+) IV3(+)

IN5 IN7

IN4 IN6

COM 2

IN8 IN10

IN9 IN11

COM 3

IN13 IN15 IN17 IN19

IN12 IN14 IN16 IN18

COM
ANA

L1

DC0

OV1

OUT0

OUT1 OUT2 OUT3 OUT4

OUT5

OUT7 OUT8 OUT10

OUT6 OUT9 OUT11

OV0

VAC

L2/N

VAC

VAC

DC1
VAC

DC2
VAC

DC3
VAC

DC4
VAC

DC6
VAC

COM
ANA

DC5

VAC

Group 0 Group 1 Group 2 Group 3 Group 5Group 4 Group 6

Input Terminal Block

Output Terminal Block

44525

Input Terminal Block

Output Terminal Block

44526

ATTENTION: The 24V DC sensor supply of the 1766-L32BWA and
1766-L32BWAA controllers should not be used to power output
circuits. It should only be used to power input devices, for example,
sensors and switches. See Master Control Relay on page 13 for
information on MCR wiring in output circuits.

Figure 4 - 1766-L32AWA/L32AWAA

Figure 5 - 1766-L32BXB/L32BXBA

IN9 IN11

COM 2

OUT7

COM 3

IN13 IN15 IN17 IN19

IN12 IN14 IN16 IN18

OUT8 OUT9 OUT10

DC3
VAC

DC5

VAC

VAC

OUT11

IN0 IN2

COM 0

IN1

IN3

VDC

VDC

+24

OUT0

NEUT

DC0
VAC

Group 0 Group 1 Group 3 Group 4 Group 5Group 2

COM 1

IN5 IN7

IN4 IN6

OUT1 OUT2 OUT4 OUT6

DC1

VDC2 OUT3 OUT5 DC4

VAC

IN8 IN10

COM 2

Wire Types and Sizes

Wire Type Wire Size

COM
ANA

OV0

IV0(+) IV2(+)

COM
ANA

OV1

IV1(+) IV3(+)

34 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Output Terminal Grouping

Wire Your Controller Chapter 3

Wire Types and Sizes

Solid wire Cu-90⋅C (194⋅F) 14…22 AWG

Stranded wire Cu-90⋅C (194⋅F) 16…22 AWG

Wiring torque = 0.791Nm (7 in-lb) rated.

Controllers Output Group Description

1766-L32BWA
1766--L32BWAA

1766-L32AWA
1766-L32AWAA

1766-L32BXB
1766-L32BXBA

Group 0 Isolated relay output VAC/DC0 OUT 0

Group 1 Isolated relay output VAC/DC1 OUT 1

Group 2 Isolated relay output VAC/DC2 OUT 2

Group 3 Isolated relay output VAC/DC3 OUT 3

Group 4 Isolated relay output VAC/DC4 OUT 4, OUT 5

Group 5 Isolated relay output VAC/DC5 OUT 6, OUT 7

Group 6 Isolated relay output VAC/DC6 OUT 8…11

Group 0 Isolated relay output VAC/DC0 OUT 0

Group 1 Isolated relay output VAC/DC1 OUT 1

Group 2 Isolated relay output VAC/DC2 OUT 2

Group 3 Isolated relay output VAC/DC3 OUT 3

Group 4 Isolated relay output VAC/DC4 OUT 4, OUT 5

Group 5 Isolated relay output VAC/DC5 OUT 6, OUT 7

Group 6 Isolated relay output VAC/DC6 OUT 8…11

Group 0 Isolated relay output VAC/DC0 OUT 0

Group 1 Isolated relay output VAC/DC1 OUT 1

Group 2 FET output VDC2/COM 2 OUT 2…7

Group 3 Isolated relay output VAC/DC3 OUT 8

Group 4 Isolated relay output VAC/DC4 OUT 9

Group 5 Isolated relay output VAC/DC5 OUT 10, OUT 11

Outputs
Voltage Terminal

Output Terminal

WARNING: If you connect or disconnect wiring while the

field-side power is on, an electrical arc can occur. This could cause
an explosion in hazardous location installations. Be sure that
power is removed or the area is nonhazardous before proceeding.

WARNING: The local programming terminal port is intended for
temporary use only and must not be connected or disconnected
unless the area is free of ignitable concentrations of flammable
gases or vapors.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 35

Chapter 3 Wire Your Controller

TIP

NOT

USED

NOT

USED

COM 0

L2a

L1a

IN0 IN1 IN2 IN3 COM 1

L2b

L1b

IN4 IN5 IN6 IN7 COM 2

L2c

L1c

IN8 IN9 IN10 IN11

COM 3

L2d

L1d

IN12 IN13 IN14 IN15

IN17 IN18 IN19IN16

COM

ANA

A

GND AIN0

IV0(+) IV1(+) IV2(+) IV3(+)

A

IN1 AIN2 AIN3

1766-L32AWAA only

Sinking and Sourcing Wiring Diagrams

Any of the MicroLogix 1400 DC embedded input groups can be configured as
sinking or sourcing depending on how the DC COM is wired on the group.

Type Definition

Sinking Input The input energizes when high-level voltage is applied to the input terminal

(active high). Connect the power supply VDC (-) to the input group’s COM
terminal.

Sourcing Input The input energizes when low-level voltage is applied to the input terminal

(active low). Connect the power supply VDC (+) to the input group’s COM
terminal.

ATTENTION: The 24V DC sensor power source must not be used
to power output circuits. It should only be used to power input
devices (for example. sensors, switches). See Master Control Relay
on page 13 for information on MCR wiring in output circuits.

1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA, 1766-L32AWAA, 1766-L32BXBA Wiring Diagrams

In the following diagrams, lower case alphabetic subscripts are
appended to common-terminal connections to indicate that different
power sources may be used for different isolated groups, if desired.

Figure 6 - 1766-L32AWA/L32AWAA Input Wiring Diagram

(1) “NOT USED” terminals are not intended for use as connection points.

(1)

36 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Wire Your Controller Chapter 3

DC

COM 0

-DCa

+DCa

IN0 IN1 IN2 IN3DCCOM 1

-DCb

+DCb

IN4 IN5 IN6 IN7DCCOM 2

-DCc

+DCc

IN8 IN9 IN10 IN11

-DC +DC

24V DC
Sensor

Power

DC OUT

- 24V +

DC

COM 3

-DCd

+DCd

IN12 IN13 IN14 IN15

IN17 IN18 IN19IN16

COM

ANA

A

GND AIN0

IV0(+) IV1(+) IV2(+) IV3(+)

A

IN1 AIN2 AIN3

1766-L32BWAA only

DC

COM 0

+DCa

-DCa

IN0 IN1 IN2 IN3DCCOM 1

+DCb

-DCb

IN4 IN5 IN6 IN7DCCOM 2

+DCc

-DCc

IN8 IN9 IN10 IN11

-DC +DC

24V DC
Sensor

Power

DC OUT

- 24V +

DC

COM 0

-DCa

+DCa

IN0 IN1 IN2 IN3

DC

COM 1

-DCb

+DCb

IN4 IN5 IN6 IN7

DC

COM 2

-DCc

+DCc

IN8 IN9 IN10 IN11

NOT

USED

NOT

USED

DC

COM 3

-DCd

+DCd

IN12 IN13 IN14 IN15

IN17 IN18 IN19IN16

COM

ANA

A

GND AIN0

IV0(+) IV1(+) IV2(+) IV3(+)

A

IN1 AIN2 AIN3

1766-L32BXBA only

Figure 7 - 1766-L32BWA/L32BWAA Sinking Input Wiring Diagram

Figure 8 - 1766-L32BWA/L32BWAA Sourcing Input Wiring Diagram

1766-L32BWAA only

-DCd

+DCd

DC

COM 3

IN12 IN13 IN14 IN15

IN17 IN18 IN19IN16

GNDAIN0

A

COM

IV0(+) IV1(+) IV2(+) IV3(+)

ANA

Figure 9 - 1766-L32BXB/L32BXBA Sinking Input Wiring Diagram

IN1AIN2AIN3

A

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 37

Chapter 3 Wire Your Controller

DC

COM 0

+DCa

-DCa

IN0 IN1 IN2 IN3

DC

COM 1

+DCb

-DCb

IN4 IN5 IN6 IN7

DC

COM 2

+DCc

-DCc

IN8 IN9 IN10 IN11

NOT

USED

NOT

USED

L1

L2

-DCa L1a L2a A

OUT0AOUT1

A

GND

L1 L2/N

100-240 VAC

DC0
VAC

OUT0 DC1

VAC

OUT1 DC2

VAC

OUT2 DC3

VAC

OUT3 DC4

VAC

OUT4 OUT5 DC5

VAC

OUT6 OUT7 DC6

VAC

OUT8 OUT9 OUT10 OUT11

COM
ANA

OV0 OV1

+DCa L1b L2b L1c L2c L1d L2d L3d L1e L2e L3e L1f L2f L3f L4f L5f

CR CR CR CR CR CR

+DC

-DC

-DCa +DCb -DCb AOUT0 AOUT1AGND

+ 24V -

DC IN

DC0
VAC

OUT0 DC1

VAC

OUT1 VDC2 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 COM2 DC3

VAC

OUT8 DC4

VAC

OUT9 DC5

VAC

OUT10 OUT11

COM
ANA

OV0 OV 1

+DCa +DCc -DCc +DCd -DCd +DCe -DCe +DCf -DCf -DCf

CR CR CR CR CRCR

Figure 10 - 1766-L32BXB/L32BXBA Sourcing Input Wiring Diagram

1766-L32BXBA only

-DCd

+DCd

A

GND AIN0

A

IN1 AIN2 AIN3

DC

IN12 IN13 IN14 IN15

COM 3

IN17 IN18 IN19IN16

COM

IV0(+) IV1(+) IV2(+) IV3(+)

ANA

Figure 11 - 1766-L32AWA/L32AWAA and 1766-L32BWA/L32BWAA Output Wiring
Diagram

Figure 12 - 1766-L32BXB/L32BXBA Output Wiring Diagram

Controller I/O Wiring

Minimizing Electrical Noise

Because of the variety of applications and environments where controllers are
installed and operating, it is impossible to ensure that all environmental noise will
be removed by input filters. To help reduce the effects of environmental noise,
install the MicroLogix 1400 system in a properly rated (for example, NEMA)
enclosure. Make sure that the MicroLogix 1400 system is properly grounded.

A system may malfunction due to a change in the operating environment after a
period of time. We recommend periodically checking system operation,

38 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

particularly when new machinery or other noise sources are installed near the
MicroLogix 1400 system.

Wire Your Controller Chapter 3

Sensor 2 (V)
Voltage

44529

Sensor 3
(V) Voltage

Sensor 0 (V)
Voltage

Sensor 1 (V)
Voltage

Wiring Your Analog Channels

Analog input circuits can monitor voltage signals and convert them to serial
digital data.

Input Terminal Block

I/9 I/11

COM 3

I/13 I/15 I/17 I/19

I/12 I/14 I/16 I/18

IV0(+) IV2(+)

COM
ANA

IV1(+) IV3(+)

/7

I/8 I/10

COM 2

The controller does not provide loop power for analog inputs. Use a power
supply that matches the transmitter specifications as shown.

The analog output can support a voltage function as shown in the following
illustration.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 39

Chapter 3 Wire Your Controller

OV1O/3 O/4

O/5

O/7 O/8 O/10

O/6 O/9 O/11

OV0

3CDC4

VAC

DC6
VAC

COM
ANA

DC5

VAC

Output Terminal Block

Voltage Load

44680

Voltage Load

Figure 13 - Analog Output

Analog Channel Wiring Guidelines

Consider the following when wiring your analog channels:

• The analog common (COM) is connected to earth ground inside the
module. These terminals are not electrically isolated from the system. They
are connected to chassis ground.

• Analog channels are not isolated from each other.

• Use Belden 8761, or equivalent, shielded wire.

• Under normal conditions, the drain wire (shield) should be connected to

the metal mounting panel (earth ground). Keep the shield connection to
earth ground as short as possible.

• To ensure optimum accuracy for voltage type inputs, limit overall cable
impedance by keeping all analog cables as short as possible. Locate the I/O
system as close to your voltage type sensors or actuators as possible.

• The controller does not provide loop power for analog inputs. Use a power
supply that matches the transmitter specifications as shown below.

40 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 14 - Analog Input Transmitter Specifications

IV0(+), IV1(+), IV2(+) or IV3(+)

Controller

IV0(+), IV1(+), IV2(+) or IV3(+)

Controller

+-

+-+

-

IV0(+), IV1(+), IV2(+) or IV3(+)

COM ANA

Controller

+

-

+

-

GND

+

-

COM ANA

COM ANA

2-Wire Transmitter

3-Wire Transmitter

4-Wire Transmitter

Transmitter

Transmitter

Transmitter

Supply

Signal

Supply

Signal

Powe r
Supply

Powe r
Supply

44530

Wire Your Controller Chapter 3

Minimizing Electrical Noise on Analog Channels

Inputs on analog channels employ digital high-frequency filters that significantly
reduce the effects of electrical noise on input signals. However, because of the
variety of applications and environments where analog controllers are installed
and operated, it is impossible to ensure that all environmental noise will be
removed by the input filters.

Several specific steps can be taken to help reduce the effects of environmental
noise on analog signals:

• install the MicroLogix 1400 system in a properly rated enclosure, for
example, NEMA. Make sure that the MicroLogix 1400 system is properly
grounded.

• use Belden cable #8761 for wiring the analog channels, making sure that
the drain wire and foil shield are properly earth grounded.

• route the Belden cable separately from any AC wiring. Additional noise
immunity can be obtained by routing the cables in grounded conduit.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 41

Chapter 3 Wire Your Controller

IMPORTANT

Foil Shield

Black Wire

Drain Wire

Clear Wire

Insulation

44531

Common
connected
internally.

44570

Grounding Your Analog Cable

Use shielded communication cable (Belden #8761). The Belden cable has two
signal wires (black and clear), one drain wire, and a foil shield. The drain wire and
foil shield must be grounded at one end of the cable.

Do not ground the drain wire and foil shield at both ends of the
cable

Expansion I/O Wiring

Digital Wiring Diagrams

The following illustrations show the digital expansion I/O wiring diagrams.

Figure 15 - 1762-IA8 Wiring Diagram

L1

IN 0

IN 1

IN 2

IN 3

100/120V AC

L2

IN 5

IN 7

AC

COM

AC

COM

IN 4

IN 6

42 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 16 - 1762-IQ8 Wiring Diagram

IN 7

IN 5

IN 3

IN 1

DC

COM

IN 6

IN 4

IN 2

IN 0

24V DC

DC

COM

Common connected
internally.

-DC (sinking)
+DC (sourcing)

+DC (sinking)

-DC (sourcing)

44571

+DC (Sinking)

-DC (Sourcing)

-DC (Sinking)
+DC (Sourcing)

+DC (Sinking)

-DC (Sourcing)

-DC (Sinking)
+DC (Sourcing)

44572

Wire Your Controller Chapter 3

Figure 17 - 1762-IQ16 Wiring Diagram

IN 0

IN 1

IN 2

IN 3

IN 4

24V DC

IN 5

IN 6

IN 7

DC

COM 0

IN 8

IN 9

IN 10

IN 11

IN 13

IN 15

IN 12

IN 14

DC

COM 1

24V DC

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 43

Chapter 3 Wire Your Controller

44920

OUT 5

VAC

1

OUT 2

OUT 0

OUT 7

OUT 4

OUT 3

OUT 1

VAC

0

OUT 6

CR

CR

CR

CR

CR

CR

L2

L1

L2

L1

44573

Figure 18 - 1762-IQ32T Wiring Diagram

Figure 19 - 1762-OA8 Wiring Diagram

44 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 20 - 1762-OB8 Wiring Diagram

+DC

24V DC (source)

-DC

OUT 6

OUT 4

OUT 2

OUT 0

OUT 7

OUT 5

OUT 3

OUT 1

+VDC

CR

CR

CR

CR

CR

CR

DC COM

44574

OUT 6

OUT 2

OUT 0

OUT 10

OUT 5

OUT 7

OUT 9

OUT 11

OUT 13

OUT 15

OUT 14

OUT 3

OUT 1

VDC+

OUT 8

OUT 12

CR

CR

CR

CR

CR

CR

CR

CR

CR

CR

OUT 4

DC COM

24V DC (source)

+DC

-DC

44575

Figure 21 - 1762-OB16 Wiring Diagram

Wire Your Controller Chapter 3

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 45

Chapter 3 Wire Your Controller

44925

Figure 22 - 1762-OB32T Wiring Diagram

46 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 23 - 1762-OV32T Wiring Diagram

44915

OUT 5

VAC-VDC2

OUT 2

OUT 0

OUT 7

OUT 4

OUT3

OUT 1

VAC-VDC 1

OUT 6

CR

CR

CR

CR

CR

CR

L1 VAC1 +

L2 DC1 COM

L1 VAC2 +

L2 DC2 COM

44576

Wire Your Controller Chapter 3

Figure 24 - 1762-OW8 Wiring Diagram

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 47

Chapter 3 Wire Your Controller

OUT 2

OUT 0

OUT 3

OUT 1

VAC-VDC

0

CR

CR

CR

OUT 6

OUT 4

OUT 7

OUT 5

CR

CR

CR

OUT 10

OUT 8

OUT 11

OUT 9

VAC-VDC

1

CR

CR

CR

OUT 14

OUT 12

OUT 15

OUT 13

CR

CR

CR

L1

L2

+DC

-DC

44577

Figure 25 - 1762-OW16 Wiring Diagram

48 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 26 - 1762-OX6I Wiring Diagram

L1-0

L1-1

L1-2

L1-3

L1-4

L1-5

OUT0 N.C.

OUT0 N.O.

OUT1 N.C.

OUT1 N.O.

OUT2 N.C.

OUT2 N.O.

OUT3 N.O.

OUT3 N.C.

OUT4 N.C.

OUT4 N.O.

OUT5 N.C.

OUT5 N.O.

CR

CR

CR

CR

CR

CR

L1 OR +DC

L1 OR +DC

L1 OR +DC

L1 OR +DC

L1 OR +DC

L1 OR +DC

L2 OR -DC

L2 OR -DC

L2 OR -DC

L2 OR -DC

L2 OR -DC

L2 OR -DC

44578

Wire Your Controller Chapter 3

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 49

Chapter 3 Wire Your Controller

44579

Figure 27 - 1762-IQ8OW6 Wiring Diagram

IN 1

IN 3

+DC (Sinking)

-DC (Sourcing)

-DC (Sinking)
+DC (Sourcing)

IN 4

IN 6

IN 7

DC

COM 1

IN 0

IN 2

DC

COM 0

IN 5

+DC (Sinking)

-DC (Sourcing)

-DC (Sinking)
+DC (Sourcing)

L1 or +DC

CR

VAC

VDC

OUT 0

OUT 2

OUT 4

VAC
VDC

OUT 1

OUT 3

OUT 5

Connected Internally

L1 or +DC

CR

CR

CR

L2 or -DC

Analog Wiring

Consider the following when wiring your analog modules:

• The analog common (COM) is not connected to earth ground inside the
module. All terminals are electrically isolated from the system.

• Channels are not isolated from each other.

• Use Belden 8761, or equivalent, shielded wire.

• Under normal conditions, the drain wire (shield) should be connected to

the metal mounting panel (earth ground). Keep the shield connection to
earth ground as short as possible.

• To ensure optimum accuracy for voltage type inputs, limit overall cable
impedance by keeping all analog cables as short as possible. Locate the I/O
system as close to your voltage type sensors or actuators as possible.

• The module does not provide loop power for analog inputs. Use a power
supply that matches the input transmitter specifications.

1762-IF2OF2 Input Type Selection

Select the input type, current or voltage, using the switches located on the
module’s circuit board and the input type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1400 Programmable Controllers
Instruction Set Reference Manual, publication 1766-RM001
switches through the ventilation slots on the top of the module. Switch 1 controls

50 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

. You can access the

Wire Your Controller Chapter 3

1

ON

2

Ch0 Ch1

Current (ON) Default

Voltage (OFF)

Switch Location

channel 0; switch 2 controls channel 1. The factory default setting for both
switch 1 and switch 2 is Current. Switch positions are shown below.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 51

Chapter 3 Wire Your Controller

1762-IF2OF2 Output Type Selection

The output type selection, current or voltage, is made by wiring to the
appropriate terminals, Iout or Vout, and by the type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1400 Programmable Controllers
Instruction Set Reference Manual, publication 1766-RM001

ATTENTION: Analog outputs may fluctuate for less than a second
when power is applied or removed. This characteristic is common
to most analog outputs. While the majority of loads will not
recognize this short signal, it is recommended that preventive
measures be taken to ensure that connected equipment is not
affected.

.

1762-IF2OF2 Wiring

The following illustration shows the 1762-IF2OF2 analog expansion I/O
terminal block.

52 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Figure 28 - 1762-IF2OF2 Terminal Block Layout

V Out 1

V Out 0

IN 1 (+)

IN 0 (+)

I Out 1

I Out 0

IN 1 (-)

IN 0 (-)

COM

COM

Common connected internally.

IN 0 (+)

IN 0 (-)

V out 0

V out 1

I out 0

I out 1

COM

IN 1 (-)

IN 1 (+)

COM

Analog Sensor

Load

Figure 29 - Differential Sensor Transmitter Types

Wire Your Controller Chapter 3

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 53

Chapter 3 Wire Your Controller

+

+

-

-

+-+

-

IN +

IN -

COM

+

-

IN +

IN -

COM

+

-

IN +

IN -

COM

Power

Supply

(1)

Tr an sm it te r

Tr an sm it te r

Tr an sm it te r

Supply

Supply

Signal

Signal

Module

Module

Module

2-Wire Transmitter

3-Wire Transmitter

4-Wire Transmitter

Power

Supply

(1)

Power

Supply

(1)

(1) All power supplies rated N.E.C. Class 2.

1

Ch0 Ch1 Ch2 Ch3

ON

2 1ON2

Current (ON Default)

Voltage (OFF)

Switch Location

Figure 30 - Single-ended Sensor/Transmitter Types

54 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

1762-IF4 Input Type Selection

Select the input type, current or voltage, using the switches located on the
module’s circuit board and the input type/range selection bits in the
Configuration Data File. Refer to MicroLogix 1400 Programmable Controllers
Instruction Set Reference Manual, publication 1766-RM001. You can access the
switches through the ventilation slots on the top of the module.

Figure 31 - 1762-IF4 Terminal Block Layout

TIP

IN 1 (+)

IN 0 (+)

IN 1 (-)

IN 0 (-)

IN 3 (+)

IN 2 (+)

IN 3 (-)

IN 2 (-)

COM

COM

Commons internally connected.

IN 0 (+)

IN 0 (-)

IN 3 (+)

IN 3 (-)

IN 2 (+)

IN 2 (-)

COM

IN 1 (-)

IN 1 (+)

COM

Analog Sensor

Figure 32 - Differential Sensor Transmitter Types

Wire Your Controller Chapter 3

Grounding the cable shield at the module end only usually provides
sufficient noise immunity. However, for best cable shield
performance, earth ground the shield at both ends, using a 0.01µF
capacitor at one end to block AC power ground currents, if necessary.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 55

Chapter 3 Wire Your Controller

+

+

-

-

+-+

-

IN +

IN -

COM

+

-

IN +

IN -

COM

+

-

IN +

IN -

COM

Power

Supply

(1)

Power

Supply

(1)

Power

Supply

(1)

Tr an sm it te r

Tr an sm it te r

Tr an sm it te r

Module

Supply

Signal

2-Wire Transmitter

3-Wire Transmitter

4-Wire Transmitter

(1)

All power supplies rated N.E.C. Class 2.

Supply

Signal

Module

Module

V out 3

V out 2

V out 1

V out 0

I out 3

I out 2

I out 1

I out 0

COM

COM

Commons connected internally

Figure 33 - Sensor/Transmitter Types

1762-OF4 Output Type Selection

The output type selection, current or voltage, is made by wiring to the
appropriate terminals, Iout or Vout, and by the type/range selection bits in the
Configuration Data File.

1762-OF4 Terminal Block Layout

56 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

1762-OF4 Wiring

I out 0

I out 1

V out 2

V out 3

V out 0

V out 1

COM

I out 3

I out 2

COM

Current Load

Voltage Load

Wire Your Controller Chapter 3

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 57

Chapter 3 Wire Your Controller

Notes:

58 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Chapter

4

Communication Connections

This chapter describes how to communicate with your control system. The
method you use and cabling required to connect your controller depends on what
type of system you are employing. This chapter also describes how the controller
establishes communication with the appropriate network. Topics include:

• supported communication protocols

• default communication configurations

• using communications toggle functionality

• connecting to RS-232 port

• connecting to RS-485 network

• connecting to AIC+

• connecting to DeviceNet

• connecting to Ethernet

Supported Communication Protocols

The MicroLogix 1400 controllers provide three communication channels, an
isolated RS-232/485 communication port (Channel 0), an Ethernet port
(Channel 1) and a non-isolated RS-232 communication port (Channel 2).

MicroLogix 1400 controllers support the following communication protocols
from the primary RS-232/485 communication channel 0 and the RS-232
communication channel 2:

• DH-485

• DF1 Full-Duplex

• DF1 Half-Duplex Master and Slave

• DF1 Radio Modem

• Modbus RTU Master and Slave

• ASCII

• DNP3 Slave

The Ethernet communication channel, Channel 1, allows your controller to be
connected to a local area network for various devices providing 10 Mbps/100
Mbps transfer rate. MicroLogix 1400 controllers support Ethernet/IP with CIP
explicit messaging (message exchange), BOOTP/DHCP Client, HTTP Server,
SMTP Client, DNS Client, SNMP Server, Socket Interface with CIP Generic
messaging, Modbus TCP Client/Server and DNP3 over IP. MicroLogix 1400
controllers do not support Ethernet I/O master capability through CIP implicit
messaging (real-time I/O messaging).

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 59

Chapter 4 Communication Connections

TIP

For more information on MicroLogix 1400 communications, refer to the
MicroLogix 1400 Programmable Controllers Instruction Set Reference Manual,
publication 1766-RM001.

Default Communication Configuration

The MicroLogix 1400 communication Channel 0 has the following default
communication configuration.

For Channel 0, the default configuration is present when:

• The controller is powered-up for the first time.

• The communications toggle functionality specifies default
communications (specified using the LCD Display. The DCOMM
indicator on the LCD Display is on, that is, lit in solid rectangle).

• An OS upgrade is completed.

See Chapter 5 for more information about using the LCD Display.

See Appendix E for more information about communicating.

DF1 Full-Duplex Default Configuration Parameters

Parameter Default

Baud Rate 19.2 KBps

Parity none

Source ID (Node Address) 1

Control Line no handshaking

Error Detection CRC

Embedded Responses auto detect

Duplicate Packet (Message) Detect enabled

ACK Timeout 50 counts

NAK retries 3 retries

ENQ retries 3 retries

Stop Bits 1

Data Bits 8

Using the Communications Toggle Functionality

The Communications Toggle Functionality can be operated using the LCD
display on the controller, as shown below.

Use the Communications Toggle Functionality to change from the user-defined
communication configuration to the default communications mode and back on
Channel 0. The Default Communications (DCOMM) indicator on the LCD
display operates to show when the controller is in the default communications

60 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

TIP

COMM0

CO

MM 1

DCOM

M

BAT. LO

U-DISP

COM

M

2

mode. Hold down the OK key more than 5 seconds to toggle the communication
mode on the Main Menu screen.

The Communication Toggle Functionality only affects the
communication configuration of Channel 0.

Changing Communication Configuration

Follow the procedure below to change from the user-defined communication
configuration to the default communications mode and back. In this example, we
will start from the Main Menu screen of the LCD display, as shown below. If
necessary, press ESC repeatedly until you return to the Main Menu screen.

1. On the Main Menu screen, select Advance Set by using the Up and Down
keys on the LCD keypad. If the menu items shown in the figure below are
not displayed on the Main Menu screen, you need to scroll down the
screen by pressing the Down key.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 61

Chapter 4 Communication Connections

DC

OM

M

2. Press the OK key on the LCD keypad. The Advanced Settings Menu
screen is displayed.

3. Select DCOMM Cfg using the Up and Down keys, and then press the OK
key.

4. The DCOMM Configuration screen is displayed. In this example, the
current status is Disable.

The DCOMM status indicator, which is the fourth of the six indicators at
the top left of the LED display, is displayed as an empty rectangle. It means
that the communication configuration is set to a user-defined
communication mode at present.

62 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

COMM0COM

M

1

D

COM

M

BA

T

.

LO

U-

DI

SP

COM

M

2

5. Use the up arrow to change the indicator position so that it is pointing to
Enable. Press the OK key to change to the default communication mode.

The DCOMM Mode Change Notification screen is displayed. It indicates
that the communication configuration is changed to the default
communication mode. The DCOMM status indicator is displayed in solid
rectangle.

If you change to the user-defined configuration from the default
configuration mode by selecting Disable and pressing the OK key, the
DCOMM Mode Change Notification will be displayed.

6. Press the ESC key to return to the Advanced Set Menu screen, as shown in

Connecting to the RS-232 Port

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 63

step 3.

There are two ways to connect the MicroLogix 1400 programmable controller to
your personal computer using the DF1 protocol: using a point-to-point
connection, or using a modem. Descriptions of these methods follow.

Chapter 4 Communication Connections

ATTENTION: All devices connected to the RS-232/485

communication port must be referenced to controller ground, or be
floating (not referenced to a potential other than ground). Failure to
follow this procedure may result in property damage or personal
injury.

• For 1766-L32BWA controllers, the COM of the sensor supply is
also connected to chassis ground internally. The 24V DC sensor
power source should not be used to power output circuits. It
should only be used to power input devices.

• For 1766-L32BXB controllers, the VDC NEUT or common terminal
of the power supply is also connected to chassis ground
internally.

Available Communication Cables

Communication Cables Length

1761-CBL-AM00 Series C or later cables are required for Class I Div 2 applications. 45 cm (17.7 in.)

1761-CBL-AP00 Series C or later cables are required for Class I Div 2 applications. 45 cm (17.7 in.)

1761-CBL-PM02 Series C or later cables are required for Class I Div 2 applications. 2 m (6.5 ft)

1761-CBL-HM02 Series C or later cables are required for Class I Div 2 applications. 2 m (6.5 ft)

2707-NC9 Series C or later cables are required for Class I Div 2 applications. 15 m (49.2 ft)

1763-NC01 Series A or later 30 cm (11.8 in.)

1747-CP3 Series A or later 3 m (9.8 ft)

ATTENTION: UNSUPPORTED CONNECTION
Do not connect a MicroLogix 1400 controller to another MicroLogix
family controller such as MicroLogix 1000, MicroLogix 1200,
MicroLogix 1500, or to the 1747-DPS1 Network port using a
1761-CBL-AM00 (8-pin mini-DIN to 8-pin mini-DIN) cable or
equivalent.
This type of connection will cause damage to the RS-232/485
communication port (Channel 0) of the MicroLogix 1400 and/or the
controller itself. Communication pins used for RS-485
communications are alternately used for 24V power on the other
MicroLogix controllers and the 1747-DPS1 network port .

Making a DF1 Point-to-Point Connection

You can connect the MicroLogix 1400 programmable controller to your personal
computer using a serial cable (1761-CBL-PM02) from your personal computer’s
serial port to the controller’s Channel 0. The recommended protocol for this
configuration is DF1 Full-Duplex.

You can connect a MicroLogix 1400 controller to your personal computer
directly without using an external optical isolator, such as Advanced Interface

64 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

IMPORTANT

MicroLogix 1400 Channel 0

Personal
Computer

1761-CBL-AP00 or

1761-CBL-PM02

1)

44593

Modem Cable

(straight-through)

Personal Computer

Modem

Modem

MicroLogix 1400
Channel 0

Protocol Options

· DF1 Full-Duplex protocol (to 1 controller)

· DF1 Half-Duplex protocol (to multiple controllers)

· Modbus RTU Slave protocol

1761-CBL-AP00 or

1761-CBL-PM02

(1)

(straight-through)

44594

Converter (AIC+), catalog number 1761-NET-AIC, as shown in the illustration
below, because Channel 0 is isolated within the controller.

(1) Series C or later cables are required for Class I Div 2 applications.

Using a Modem

You can use modems to connect a personal computer to one MicroLogix 1400
controller (using DF1 Full-Duplex protocol), to multiple controllers (using DF1
Half-Duplex protocol), or Modbus RTU Slave protocol via Channel 0, as shown
in the following illustration. (See Appendix E for information on types of
modems you can use with the micro controllers.)

Do not attempt to use DH-485 protocol through modems under any
circumstance. The communication timing using DH-485 protocol is not
supported by modem communications.

(1) Series C or later cables are required for Class I Div 2 applications.

You can connect a MicroLogix 1400 controller to your modem directly without
using an external optical isolator, such as AIC+, catalog number 1761-NET-AIC,
as shown in the illustration below, because Channel 0 is isolated within the
controller.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 65

Chapter 4 Communication Connections

DTE Device
(MicroLogix
1400
Channel 0)

DCE Device
(Modem,
PanelView,
etc.)

8-Pin 25-Pin 9-Pin

7 TXD TXD 2 3

4 RXD RXD 3 2

2GND GND7 5

1B(+) DCD8 1

8A(-) DTR204

5 DCD DSR 6 6

6 CTS CTS 5 8

3 RTS RTS 4 7

AIC+ Optical Isolator
or 1766-LEC Channel 2

Modem

9-Pin 25-Pin 9-Pin

3 TXD TXD 2 3

2 RXD RXD 3 2

5GND GND7 5

1CD CD8 1

4DTR DTR204

6 DSR DSR 6 6

8 CTS CTS 5 8

7 RTS RTS 4 7

pins 4 and 6
are internally
connected for
1766-LEC only

MicroLogix 1400 Channel 0 to Modem Cable Pinout

When connecting MicroLogix 1400 Channel 0 to a modem using an RS-232
cable, the maximum that the cable length may be extended is 15.24 m (50 ft).

Constructing Your Own Modem Cable

If you construct your own modem cable, the maximum cable length is 15.24 m
(50 ft) with a 25-pin or 9-pin connector. Refer to the following typical pinout for
constructing a straight-through cable:

66 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

ATTENTION: Do not connect pins 1 and 8. This connection will

cause damage to the RS-232/485 communication port (channel 0)
of the MicroLogix 1400 and/or the controller itself.

Communication Connections Chapter 4

Optical Isolator Modem

9-Pin 25-Pin 9-Pin

3 TXD TXD 2 3

2 RXD RXD 3 2

5GND GND7 5

1CD CD8 1

4DTR DTR204

6 DSR DSR 6 6

8 CTS CTS 5 8

7 RTS RTS 4 7

Constructing Your Own Null Modem Cable

If you construct your own null modem cable, the maximum cable length is

15.24m (50 ft) with a 25-pin or 9-pin connector. Refer to the following typical
pinout:

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 67

Chapter 4 Communication Connections

Connecting to a DF1 Half-Duplex Network

When a communication port is configured for DF1 Half-Duplex Slave, available
parameters include the following:

DF1 Half-Duplex Configuration Parameters

Parameter Options

Baud Rate 300, 600, 1200, 2400, 4800, 9600, 19.2 KBps, 38.4 KBps

Parity none, even

Node Address 0...254 decimal

Control Line no handshaking, half duplex modem (RTS/CTS handshaking, no handshaking (485 network)

Error Detection CRC, BCC

EOT Suppression enabled, disabled

When EOT Suppression is enabled, the slave does not respond when polled if no message is queued. This saves
modem transmission power and time when there is no message to transmit.

Duplicate Packet (Message)
Detect

Poll Timeout (x20 ms) 0...65,535 (can be set in 20 ms increments)

RTS Off Delay (x20 ms) 0...65,535 (can be set in 20 ms increments)

RTS Send Delay (x20 ms) 0...65,535 (can be set in 20 ms increments)

Message Retries 0...255

Pre Transmit Delay
(x1 ms)

enabled, disabled
Detects and eliminates duplicate responses to a message. Duplicate packets may be sent under noisy communication

conditions if the sender’s Message Retries are not set to 0.

Poll Timeout only applies when a slave device initiates a MSG instruction. It is the amount of time that the slave
device waits for a poll from the master device. If the slave device does not receive a poll within the Poll Timeout, a
MSG instruction error is generated, and the ladder program needs to requeue the MSG instruction. If you are using a
MSG instruction, it is recommended that a Poll Timeout value of zero not be used. Poll Timeout is disabled when set to
zero.

Specifies the delay time between when the last serial character is sent to the modem and when RTS is deactivated.
Gives the modem extra time to transmit the last character of a packet.

Specifies the time delay between setting RTS until checking for the CTS response. For use with modems that are not
ready to respond with CTS immediately upon receipt of RTS.

Specifies the number of times a slave device attempts to resend a message packet when it does not receive an ACK
from the master device. For use in noisy environments where message packets may become corrupted in
transmission.

0...65,535 (can be set in 1 ms increments)

•When the Control Line is set to no handshaking, this is the delay time before transmission. Required
for 1761-NET-AIC physical Half-Duplex networks. The 1761-NET-AIC needs delay time to change from
transmit to receive mode.

•When the Control Line is set to DF1 Half-Duplex Modem, this is the minimum time delay between
receiving the last character of a packet and the RTS assertion.

68 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

SLC 5/03
processor

MicroLogix 1400

MicroLogix 1400

MicroLogix
1400

CH0

CH0

CH0

CH0

1761-CBL-AP00 or 1761-CBL-PM02

(4)

1761-CBL-AM00 or 1761-CBL-HM02

(4)

DF1
Master

DF1 Slave

DF1 Slave

straight 9-25 pin cable

straight 9-25
pin cable

radio modem
or lease line

radio
modem or
lease line

AIC+

RS-485 DF1
Half-Duplex

DF1 Slave

1763-NC01 (daisy chain) to AIC+

(4)

AIC+

24V DC power (User Supplied)

1763-NC01 (daisy chain) to AIC+

(4)

44595

RS-485 DF1
Half-Duplex

DF1 Half-Duplex Master-Slave Network

Use the following diagram for DF1 Half-Duplex Master-Slave protocol without
hardware handshaking.

(3)

(1)

(2)

(1) DB-9 RS-232 port
(2) mini-DIN 8 RS-232 port
(3) RS-485 port
(4) Series C or later cables are required for Class I Div 2 applications.

(2)

(3)

(1)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 69

Chapter 4 Communication Connections

Rockwell Software RSLinx 2.0 (or

higher), SLC 5/03, SLC 5/04,
SLC 5/05, PLC-5, or MicroLogix
1000, 1200, and 1500 processors
configured for DF1Half-Duplex
Master. Rockwell Software
RSLinx 2.5 required for MicroLogix

1400.

DF1 Half-Duplex Protocol

MicroLogix 1500 with
1764-LSP or 1764-LRP
Processor (Slave)

SLC 5/03 (Slave)MicroLogix

1000 (Slave)

MicroLogix 1500 with
1764-LRP Processor (Slave)

MicroLogix
1400 (Slave)

Modem

MicroLogix
1200 (Slave)

44596

TIP

A

TERMBCOM

SHLD

CHS GND

44597

DF1 Half-Duplex Network (Using PC and Modems)

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

Connecting to a RS-485 Network

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

The network diagrams on the next pages provide examples of how to connect
MicroLogix 1400 controllers to the RS-485 network.

You can connect a MicroLogix 1400 controller to your RS-485 network directly
without using an external optical isolator, such as Advanced Interface Converter
(AIC+), catalog number 1761-NET-AIC, as shown in the illustrations below,
because Channel 0 is isolated within the controller.

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

Use a 1763-NC01 Series A or later (8-pin mini-DIN to 6-pin RS-485
connector) cable or equivalent to connect a MicroLogix 1400
controller to a RS-485 network.

MicroLogix 1400 controllers support various protocols on the RS-485 network,
including DH-485, DF1 Half-Duplex Master/Slave, Modbus RTU
Master/Slave, ASCII and DNP3 Slave protocols. In this section, DH-485
protocol is used as an example. Any physical connection should be the same as
other protocols.

70 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

DH-485 Configuration Parameters

When MicroLogix communications are configured for DH-485, the following
parameters can be changed:

DH-485 Configuration Parameters

Parameter Options

Baud Rate 9600, 19.2 KBps

Node Address 1...31 decimal

Token Hold Factor 1...4

See Software Considerations on page 191 for tips on setting the parameters listed
above.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 71

Chapter 4 Communication Connections

AIC+ AIC+ AIC+

AIC+

DH-485 Network

SLC 5/04 PanelView 550

MicroLogix
1500

MicroLogix
1000

MicroLogix
1200

Personal
Computer

AIC+

AIC+

MicroLogix 1400

DH-485 Network

1763-NC01

(4)

Belden, shielded, twisted-pair cable

Belden, shielded, twisted-pair cable

1761-CBL-AP00 or
1761-CBL-PM02

1747-CP3
or 1761-CBL-AC00

port 1 or port 2
to PC

24V DC (user supplied)

(1) DB-9 RS-232 port
(2) mini-DIN 8 RS-232 port
(3) RS-485 port
(4) Series A or later cables are required.

44598

DH-485 Network with a MicroLogix 1400 Controller

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

(3)

(1)

TERM

A

B

COM

SHLD

CHS GND

TX

TX PWR

TX

DC SOURCE
CABLE

EXTERNAL

AIC+

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

(2)

TERM

A

B

A-B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

TERM

A

B

COM

SHLD

CHS GND

TX

TX

TX PWR

DC SOURCE
CABLE

EXTERNAL

PanelView

72 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

TERM

A

B

COM

SHLD

CHS GND

TX

TX PWR

TX

DC SOURCE
CABLE

EXTERNAL

A-B

PanelView

PanelView 550

MicroLogix 1400

1761-CBL-AM00
or 1761-CBL-HM02

1747-CP3 or
1761-CBL-AC00

RJ45 port

1761-CBL-AS09
or 1761-CBL-AS03

CH0

44599

Typical 3-Node Network (Channel 0 Connection)

Recommended Tools

To connect a DH-485 network to additional devices, you need tools to strip the
shielded cable and to attach the cable to the AIC+ Advanced Interface
Converter. We recommend the following equipment (or equivalent):

Working with Cable for DH-485 Network

Description Part Number Manufacturer

Shielded Twisted Pair Cable #3106A or #9842 Belden

Stripping Tool Not Applicable Not Applicable

1/8” Slotted Screwdriver Not Applicable Not Applicable

DH-485 Communication Cable

The suggested DH-485 communication cable is either Belden #3106A or #9842.
The cable is jacketed and shielded with one or two twisted-wire pairs and a drain
wire.

One pair provides a balanced signal line and one additional wire is used for a
common reference line between all nodes on the network. The shield reduces the
effect of electrostatic noise from the industrial environment on network
communication.

The communication cable consists of a number of cable segments daisy-chained
together. The total length of the cable segments cannot exceed 1219 m (4000 ft).
However, two segments can be used to extend the DH-485 network to 2438 m
(8000 ft). For additional information on connections using the AIC+, refer to
the Advanced Interface Converter (AIC+) User Manual, publication 1761-6.4.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 73

Chapter 4 Communication Connections

TIP

Belden #3106A
or #9842

Belden #3106A or
#9842

Belden #3106A or
#9842

Connector

Connector

Connector

Incorrect

Orange with

White Stripes

White with Orange Stripes

Shrink Tubing Recommended

Blue (#3106A) or
Blue with White
Stripes (#9842)

Drain Wire

6 Termination
5 A
4 B

3 Common
2 Shield
1 Chassis Ground

When cutting cable segments, make them long enough to route them from one
AIC+ to the next, with sufficient slack to prevent strain on the connector. Allow
enough extra cable to prevent chafing and kinking in the cable.

Use these instructions for wiring the Belden #3106A or #9842 cable. (See Cable
Selection Guide on page 77 if you are using standard Allen-Bradley cables.)

Connecting the Communication Cable to the DH-485 Connector

A daisy-chained network is recommended. Do not make the incorrect
connection shown below:

74 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Single Cable Connection

When connecting a single cable to the DH-485 connector, use the following
diagram.

Communication Connections Chapter 4

to Next Device

to Previous Device

Multiple Cable Connection

When connecting multiple cables to the DH-485 connector, use the following

diagram.

Connections using Belden #3106A Cable

For this Wire/Pair Connect this Wire To this Terminal

Shield/Drain Non-jacketed Terminal 2 - Shield

Blue Blue Terminal 3 - (Common)

White/Orange White with Orange Stripe Terminal 4 - (Data B)

Orange with White Stripe Terminal 5 - (Data A)

Connections using Belden #9842 Cable

For this Wire/Pair Connect this Wire To this Terminal

Shield/Drain Non-jacketed Terminal 2 - Shield

Blue/White White with Blue Stripe Cut back - no connection

Blue with White Stripe Terminal 3 - (Common)

White/Orange White with Orange Stripe Terminal 4 - (Data B)

Orange with White Stripe Terminal 5 - (Data A)

(1)

To prevent confusion when installing the communication cable, cut back the white with blue stripe wire
immediately after the insulation jacket is removed. This wire is not used by DH-485.

(1)

Grounding and Terminating the DH-485 Network

Only one connector at the end of the link must have Terminals 1 and 2 jumpered

together. This provides an earth ground connection for the shield of the

communication cable.

Both ends of the network must have Terminals 5 and 6 jumpered together, as

shown below. This connects the termination impedance (of 120 ohm) that is

built into each AIC+ or the 1763-NC01 cable as required by the DH-485

specification.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 75

Chapter 4 Communication Connections

Jumper

Jumper

Belden #3106A or #9842 Cable
1219 m (4000ft) Maximum

Jumper

DTE Device
(MicroLogix
1400
Channel 0)

DCE Device (DH-485
connector)

8-Pin 6-pin

7 TXD 6 Termination

4RXD 5A

2GND 4B

1 B(+) 3 Common

8 A(-) 2 Shield

5 DCD 1 ChassisGround

6CTS

3RTS

End-of-Line Termination

MicroLogix 1400 Channel 0 to DH-485 Communication Cable Pinout

When connecting MicroLogix 1400 Channel 0 to DH-485 communication
cable pinout using an RS-232 cable, the maximum that the cable length may be
extended is 15.24 m (50 ft). Refer to the following typical pinout:

Connecting the AIC+

You can connect a MicroLogix 1400 controller to a DH-485 network via
Channel 0 directly without using an optical isolator, such as AIC+, catalog

76 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

number 1761-NET-AIC, because Channel 0 is isolated. However, you need to
use an AIC+ to connect your PC or other MicroLogix Family products, such as
MicroLogix 1200, to a DH-485 network.

Communication Connections Chapter 4

AIC+ Advanced Interface Converter
(1761-NET-AIC)

3

2

4

5

1

1761-CBL-PM02

(2)

1761-CBL-AP00

(2)

44600

The following figure shows the external wiring connections and specifications of

the AIC+.

Item Description

1 Port 1 - DB-9 RS-232, DTE

2 Port 2 - mini-DIN 8 RS-232 DTE

3 Port 3 - RS-485 Phoenix plug

4 DC Power Source selector switch

(cable = port 2 power source,
external = external power source connected to item 5)

5 Terminals for external 24V DC power supply and chassis ground

Cable Length Connections from to AIC+ External Power

1761-CBL-AP00
1761-CBL-PM02

(1)

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

(2)

Series C or later cables are required.

(2)

(2)

45 cm (17.7 in.)
2 m (6.5 ft)

For additional information on connecting the AIC+, refer to the Advanced

Interface Converter (AIC+) User Manual, publication 1761-UM001

.

Cable Selection Guide

Supply
Required

(1)

SLC 5/03 or SLC 5/04 processors, ch 0 port 2 yes external

MicroLogix 1000, 1200, or 1500 ch 0 port 1 yes external

MicroLogix 1400 ch 2 port 2 yes external

PanelView 550 through NULL modem
adapter

port 2 yes external

DTAM Plus / DTAM Micro port 2 yes external

PC COM port port 2 yes external

Power
Selection
Switch
Setting

(1)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 77

Chapter 4 Communication Connections

1761-CBL-HM02

(2)

1761-CBL-AM00

(2)

44601

1761-CBL-AC00 1747-CP3

44602

user-supplied cable

44603

1761-CBL-AS03 1761-CBL-AS09

44604

Cable Length Connections from to AIC+ External Power

Supply
Required

1761-CBL-AM00
1761-CBL-HM02

(1)

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

(2)

Series C or later cables are required.

(2)

(2)

45 cm (17.7 in.)
2 m (6.5 ft)

MicroLogix 1000, 1200, or 1500 ch 0 port 2 no cable

to port 2 on another AIC+ port 2 yes external

(1)

Cable Length Connections from to AIC+ External Power

1747-CP3
1761-CBL-AC00

Supply
Required

(1)

3 m (9.8 ft)
45 cm (17.7 in.)

SLC 5/03 or SLC 5/04 processor, channel 0 port 1 yes external

PC COM port port 1 yes external

(1)

PanelView 550 through NULL modem adapter port 1 yes external

DTAM Plus / DTAM Micro™ port 1 yes external

Port 1 on another AIC+ port 1 yes external

MicroLogix 1400 ch 2 port 2 yes external

Power Selection
Switch Setting

Power
Selection
Switch

(1)

Setting

(1)

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

Cable Length Connections from to AIC+ External Power

Supply
Required

(1)

Power Selection
Switch Setting

straight 9-25 pin — modem or other communication device port 1 yes external

(1)

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

(1)

78 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

44605

Programming
Device

Controller

9-Pin D-Shell 8-Pin Mini Din

9RI B(+)1

8CTS GND2

7RTS RTS3

6 DSR RXD 4

5GND DCD5

4DTR CTS6

3TXD TXD7

2RXD A(-)8

1DCD

Cable Length Connections from to AIC+ External Power

1761-CBL-AS03
1761-CBL-AS09

3 m (9.8 ft)

9.5 m (31.17 ft)

SLC 500 Fixed,
SLC 5/01, SLC 5/02, and SLC 5/03 processors

Supply
Required

port 3 yes external

(1)

PanelView 550 RJ45 port port 3 yes external

(1)

External power supply required unless the AIC+ is powered by the device connected to port 2, then the selection switch should be set to cable.

1761-CBL-PM02 Series C (or equivalent) Cable Wiring Diagram

9
8
7
6

5
4
3
2
1

Power Selection
Switch Setting

(1)

687

35

4

12

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 79

Chapter 4 Communication Connections

1761-CBL-AP00 or 1761-CBL-PM02

DB-9 RS-232

RS-485 connector

cable straight D connector

Port 1

Port 2

Port 3

6

7

8

9

1
2

3
4

5

4

1

2

5

67 8

3

6

5

4

3

2
1

Recommended User-Supplied Components

These components can be purchased from your local electronics supplier.

User Supplied Components

Component Recommended Model

external power supply and chassis ground power supply rated for 20.4...28.8V dc

NULL modem adapter standard AT

straight 9-25 pin RS-232 cable see table below for port information if making

own cables

Pin Port 1: DB-9 RS-232 Port 2

1 received line signal detector

(2)

: (1761-CBL-PM02

cable)

Port 3: RS-485
Connector

24V dc chassis ground

(DCD)
2 received data (RxD) ground (GND) cable shield
3 transmitted data (TxD) request to send (RTS) signal ground
4 DTE ready (DTR)

(1)

received data (RxD)

5 signal common (GND) received line signal detector

(3)

DH-485 data B
DH-485 data A

(DCD)

6 DCE ready (DSR)

(1)

clear to send (CTS)

(3)

termination
7 request to send (RTS) transmitted data (TxD) not applicable
8 clear to send (CTS) ground (GND) not applicable
9 not applicable not applicable not applicable

(1)

On port 1, pin 4 is electronically jumpered to pin 6. Whenever the AIC+ is powered on, pin 4 will match the
state of pin 6.

(2)

An 8-pin mini DIN connector is used for making connections to port 2. This connector is not commercially
available. If you are making a cable to connect to port 2, you must configure your cable to connect to the
Allen-Bradley cable shown above.

(3)

In the 1761-CBL-PM02 cable, pins 4 and 6 are jumpered together within the DB-9 connector.

80 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

Safety Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only.

WARNING: EXPLOSION HAZARD
AIC+ must be operated from an external power source.
This product must be installed in an enclosure. All cables
connected to the product must remain in the enclosure or be
protected by conduit or other means.

See Safety Considerations on page 9 for additional information.

Install and Attach the AIC+

1. Take care when installing the AIC+ in an enclosure so that the cable
connecting the MicroLogix controller to the AIC+ does not interfere with
the enclosure door.

2. Carefully plug the terminal block into the RS-485 port on the AIC+ you
are putting on the network. Allow enough cable slack to prevent stress on
the plug.

3. Provide strain relief for the Belden cable after it is wired to the terminal
block. This guards against breakage of the Belden cable wires.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 81

Chapter 4 Communication Connections

24V
DC

DC
NEUT

CHS
GND

Bottom View

Powering the AIC+

MicroLogix 1000, 1200, and 1500 programmable controllers support 24V DC
communication power on Channel 0. When connected to the 8 pin mini-DIN
connector on the 1761-NET-AIC, 1761-NET-ENI, and the 1761-NET-ENIW,
these controllers provide the power for the interface converter modules. The
MicroLogix 1400 does not provide 24V DC communication power through
communication ports. Instead these pins are used to provide RS-485
communications directly. Any AIC+, ENI, or ENIW not connected to a
MicroLogix 1000, 1200, or 1500 controller requires a 24V DC power supply.

If both the controller and external power are connected to the AIC+, the power
selection switch determines what device powers the AIC+.

ATTENTION: If you use an external power supply, it must be
24V DC (-15%/+20%). Permanent damage results if a higher
voltage supply is used.

Set the DC Power Source selector switch to EXTERNAL before connecting the
power supply to the AIC+. The following illustration shows where to connect
external power for the AIC+.

ATTENTION: Always connect the CHS GND (chassis ground)
terminal to the nearest earth ground. This connection must be
made whether or not an external 24V DC supply is used.

Power Options

Below are two options for powering the AIC+:

82 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

• Use the 24V DC user power supply built into the MicroLogix 1000, 1200,
or 1500 controller. The AIC+ is powered through a hard-wired
connection using a communication cable (1761-CBL-HM02, or
equivalent) connected to port 2.

• Use an external DC power supply with the following specifications:
– operating voltage: 24V DC (-15%/+20%)
– output current: 150 mA minimum

Communication Connections Chapter 4

V–

CAN_L

SHIELD

CAN_H

V+

NET

MOD

NODE

DANGER

GND

TX/RX

DeviceNet Node (Port 1)
(Replacement connector
part no. 1761-RPL-RT00)

Use this write-on
area to mark the
DeviceNet node
address.

RS-232 (Port 2)

1761-CBL-HM021761-CBL-AM00

44601

1761-CBL-PM02 1761-CBL-AP00

44600

– rated NEC Class 2

Make a hard-wired connection from the external supply to the screw
terminals on the bottom of the AIC+.

ATTENTION: If you use an external power supply, it must be 24V
DC (-15%/+20%). Permanent damage results if miswired with the
wrong power source.

Connecting to DeviceNet

You can connect a MicroLogix 1400 as a slave to a DeviceNet network using the
DeviceNet Interface (DNI), catalog number 1761-NET-DNI. For additional
information on using the DNI, refer to the DeviceNet Interface User Manual,
publication 1761-UM005

. The following figure shows the external wiring

connections of the DNI.

Cable Selection Guide

(1)

Cable Length Connections from to DNI

1761-CBL-AM00
1761-CBL-HM02

45 cm (17.7 in.)
2 m (6.5 ft)

MicroLogix 1000 port 2

MicroLogix 1100/1400 channel 0 port 2

MicroLogix 1200 port 2

MicroLogix 1500 port 2

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 83

(1)

Series C (or later) cables are required.

Chapter 4 Communication Connections

RS-232/485 Port (Channel 0)

Ethernet Port (Channel 1)

44606

Cable Length Connections from to DNI

1761-CBL-AP00
1761-CBL-PM02

45 cm (17.7 in.)
2 m (6.5 ft)

SLC 5/03 or SLC 5/04 processors, channel 0port 2

PC COM port port 2

1764-LRP processor, channel 1 port 2

MicroLogix 1400 channel 2 port 2

Connecting to Ethernet

You can connect directly a MicroLogix 1400 to an Ethernet network via the
Ethernet port (Channel 1). You do not need to use an Ethernet interface card,
such as the Ethernet Interface (ENI) and (ENIW), catalog number
1761-NET-ENI and 1761-NET-ENIW, to connect your MicroLogix 1400
controller to an Ethernet network. For additional information on connecting to
an Ethernet network, see Connecting to Networks via Ethernet Interface on page

327.

84 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014

Communication Connections Chapter 4

TIP

8 7 6 5 4 3 2 11 2 3 4 5 6 7 8

End view of RJ 45 Plug Looking into a RJ45 Jack

Ethernet Connections

The Ethernet connector, Channel 1, is an RJ45, 10/100Base-T connector. The
pin-out for the connector is shown below.

Pin Pin Name

1Tx+

2Tx-

3Rx+

4 not used by 10/100Base-T

5 not used by 10/100Base-T

6Rx-

7 not used by 10/100Base-T

8 not used by 10/100Base-T

For more information on using ethernet cables with MicroLogix 1400,
see.

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 85

Chapter 4 Communication Connections

Notes:

86 Rockwell Automation Publication 1766-UM001H-EN-P - May 2014