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User Manual Original Instructions

MicroLogix 1400

Programmable Controllers

Bulletins 1766 Controllers and 1762 Expansion I/O

MicroLogix 1400 Programmable Controllers User Manual

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you

install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to

requirements of all applicable codes, laws, and standards.

Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to be carried out by suitably trained

personnel in accordance with applicable code of practice.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

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.

These labels may also be on or inside the equipment to provide specific precautions.

The following icon may appear in the text of this document.

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.

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

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.

ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Identifies information that is useful and can help to make a process easier to do or easier to understand.

Appendix D

Use ControlFLASH to Upgrade

Appendix E

Connect to Networks Via RS-

Table of Contents Appendix F MicroLogix 1400 Distributed

• About This Publication Preface
• Purpose of this Manual
• Download Firmware, AOP, EDS, and Other Files
• Summary of Changes.
• Additional Resources
• Chapter
• Hardware Overview Hardware Features
  • Component Descriptions
    • MicroLogix 1400 Memory Module and Built-in Real-time Clock
    • 1762 Expansion I/O Modules.
  • Communication Cables
  • Programming
    • Firmware Revision History
  • Communication Options.
  • Chapter
• Install Your Controller Installation Considerations
  • Safety Considerations
    • Hazardous Location Considerations
    • Disconnect Main Power
    • Safety Circuits.
    • Power Distribution
    • Proof Tests of Master Control Relay Circuit.
  • Power Considerations
    • Isolation Transformers
    • Power Supply Inrush
    • Loss of Power Source.
    • Input States on Power Down
    • Other Types of Line Conditions
  • Help Prevent Excessive Heat
  • Master Control Relay
    • Emergency Stop Switches
  • Install a Memory Module
  • Use the Battery.
    • Connect the Battery Wire Connector
  • Controller Mounting Dimensions
  • Controller and Expansion I/O Spacing.
  • Mount the Controller.
    • DIN Rail Mounting
    • Panel Mounting
  • 1762 Expansion I/O Module Dimensions
  • Mount 1762 Expansion I/O Modules
    • DIN Rail Mounting
    • Panel Mounting
  • Connect Expansion I/O Modules Table of Contents
  • Chapter
• Wire Your Controller Wiring Requirements - Wiring Recommendation - Wire without Spade Lugs - Wire with Spade Lugs.
  • Use Surge Suppressors
    • Recommended Surge Suppressors.
  • Ground the Controller.
  • Wiring Diagrams.
    • Terminal Block Layouts
  • Sinking and Sourcing Wiring Diagrams
    • L32BXBA Wiring Diagrams 1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA, 1766-L32AWAA, 1766-
  • Controller I/O Wiring.
    • Minimize Electrical Noise
  • Wire Your Analog Channels
    • Analog Channel Wiring Guidelines
    • Minimize Electrical Noise on Analog Channels
    • Ground Your Analog Cable
  • Expansion I/O Wiring
    • Digital Wiring Diagrams
    • Analog Wiring
  • Chapter
• Communication Connections Supported Communication Protocols
  • Default Communication Configuration
  • Use the Communications Toggle Functionality.
    • Change Communication Configuration
  • Connect to the RS-232 Port
    • Make a DF1 Point-to-Point Connection.
    • Modem.
    • Connect to a DF1 Half-Duplex Network
  • Connect to a RS-485 Network
    • DH-485 Configuration Parameters.
    • Recommended Tools
    • DH-485 Communication Cable
    • Connect the Communication Cable to the DH-485 Connector
    • Ground and Terminate the DH-485 Network.
  • Connect the AIC+
    • Cable Selection Guide.
    • Recommended User-Supplied Components.
    • Install and Attach the AIC+.
    • Power the AIC+
  • Connect to Ethernet
    • Ethernet Connections
  • Chapter Table of Contents
• LCD and Keypad Operating Principles. - Startup Screen - Main Menu and Default Screen. - Operating Buttons. - Select Between Menu Items - Cursor Display. - Set Values
  • I/O Status
    • View I/O Status
  • Monitor User Defined Target Files
    • Target User Defined File Number (TUF)
    • Monitor a Bit File
    • Monitor Integer Files.
    • Monitor Double Integer files
    • Monitor Floating Point Files
    • Monitor System Status Files
  • Mode Switch
    • Controller Modes.
    • Change Mode Switch Position
  • User-defined LCD Screen.
    • User-defined LCD Screen.
  • Configure Advanced Settings
  • Change Key In Mode.
    • Key In Modes.
    • Change Key In Mode
  • Communications Toggle Functionality
  • Ethernet Network Configuration
    • View Ethernet Status
    • Configure the IP Address
    • Configure the Ethernet Port
    • Configure Ethernet Protocol Setup
  • Trim Pots
    • Trim Pot Operation
    • Change Data Value of a Trim Pot
    • Trim Pot Configuration in LCD Function File
    • Error Conditions
  • View System Information.
  • View Fault Code
  • Save or Load Communication EEPROM
    • Save Communication EEPROM
    • Load communication EEPROM
  • LCD setup
    • Configure Contrast Value
    • Configure the Back Light
  • Protocol Configuration
    • Modbus RTU Slave Node Address
  • LCD Password Setup
    • Set the LCD Password
    • Activate the LCD Password Table of Contents
    • Deactivate the LCD Password
    • Change LCD Password
  • Chapter
  • Real-Time Clock Operation Modules
    • Operation at Power-up and Entering a Run or Test Mode
    • Write Data to the Real-Time Clock
    • RTC Battery Operation
  • Memory Module Operation
    • User Program, User Data, Datalog, and Recipe Back-up
    • Program Compare
    • Data File Download Protection.
    • Memory Module Write Protection
    • Removal/Insertion Under Power
    • Memory Module Information File
    • Program /Data Download.
    • Program /Data Upload
  • Chapter
• Online Editing Overview of Online Editing - Online Editing Terms.
  • Effects of Online Editing On Your System
    • System Impacts
    • Data Table File Size.
    • Online Edit Error
  • Directions and Cautions for MicroLogix 1400 Online Editing User
    • A Download is Required Before Starting Online Editing
  • Types of Online Editing.
    • Edit Functions in Runtime Online Editing.
    • Edit Functions in Program Online Editing
  • Chapter
• Auto Reset Functionality Automatic Controller Recovery - Enable the Status Bit
• Specifications Working Voltage Appendix A
  • 1762 Expansion I/O Specifications
    • Analog Modules.
• Replacement Parts MicroLogix 1400 Controller Replacement Kits. Appendix B
  • Lithium Battery (1747-BA)
    • Installation
    • Battery Handling.
    • Storage
    • Transportation Table of Contents
    • Disposal.
• Troubleshoot Your System Understand the Controller Status Indicators Appendix C - Controller Status Indicators - Status Indicators on the LCD - I/O Status Indicators on the LCD - Normal Operation - Error Conditions
  • Controller Error Recovery Model
  • Analog Expansion I/O Diagnostics and Troubleshooting
    • Module Operation and Channel Operation.
    • Power-up Diagnostics
    • Critical and Non-Critical Errors
    • Module Error Definition Table.
    • Error Codes.
  • Contact Rockwell Automation for Assistance
  • Prepare for Firmware Update Your Operating System
    • Install ControlFLASH Software
    • Use DMK Extraction Tool for Firmware Update
    • Prepare the Controller for Firmware Update
  • Use ControlFLASH for Firmware Update
  • ControlFLASH Error Messages
  • Missing or Corrupt OS state
    • Recover from Missing or Corrupt OS State
  • RS-232 Communication Interface 232/RS-485 Interface
  • RS-485 Communication Interface
  • DF1 Full-duplex Protocol
  • DF1 Half-duplex Protocol
    • DF1 Half-duplex Operation
    • Considerations When Communicating as a DF1 Slave on a Multi-drop Link
    • Using Modems with MicroLogix Programmable Controllers
  • DH-485 Communication Protocol
    • DH-485 Configuration Parameters.
    • Devices that use the DH-485 Network.
    • Important DH-485 Network Planning Considerations
    • Example DH-485 Connections
  • Modbus Communication Protocol
  • ASCII
  • Distributed Network Protocol (DNP3)
  • Disable Serial Channels 0 and
• Channel Configuration for DNP3 Slave Network Protocol
  • Channel 0 and Channel 2 Link Layer Configuration
  • Channel 1 Link Layer Configuration
  • DNP3 Slave Application Layer Configuration.
  • Channel 0 and Channel 2 Link Layer Configuration Parameters
  • Channel 1 (Ethernet) Link Layer Configuration Parameters
  • DNP3 Slave Application Layer Configuration Parameters
• DNP3 Slave Application Layer
  • Function Codes.
  • Internal Indications.
• DNP3 Objects and Controller Data Files.
  • DNP3 Data Files.
  • DNP3 Configuration Files
  • DNP3 Binary Input Object
  • DNP3 Binary Output Object.
  • DNP3 Double Bit Binary Input Object
  • DNP3 Counter Object
  • DNP3 Frozen Counter Object
  • DNP3 Analog Input Object
  • DNP3 Analog Output Object
  • DNP3 BCD Object.
  • DNP3 Data-Set Object.
  • Object Quality Flags
• DNP3 Device Attribute Object.
• Event Reporting
  • Generate Events
  • DNP3 10K Event Logging
  • Control Generating Event
  • Report Event By Polled Response
  • Report Event By Unsolicited Response
• Collision Avoidance
• Time Synchronization.
• Download a User Program Via DNP3 Network
  • Default Directories and Files
  • Generate *.IMG files using RSLogix 500/RSLogix Micro
  • Rules for File Authentication
  • Rules for Downloading a User Program
  • Rules for Uploading a User Program
  • Rules for Initializing a User Program
  • Rules for uploading Communication Status Files
  • Start and Stop User Programs (Mode Change) Via DNP3 Network.
  • Initialize User Program.
  • Start User Program.
  • Stop User Program
• Diagnostics
  • Diagnostics for Ethernet Channel (Channel 1)
  • Diagnostics for Secure Authentication
• Function Codes.

Table of Contents

Notes:

Preface

About This Publication 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.

Rockwell Automation recognizes that some of the terms that are currently used in our industry and in this publication are not in alignment with the movement toward inclusive language in technology. We are proactively collaborating with industry peers to find alternatives to such terms and making changes to our products and content. Please excuse the use of such terms in our content while we implement these changes.

Purpose of this Manual This manual is a reference guide for MicroLogix 1400 controllers and 1762 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

See MicroLogix 1400 Programmable Controllers Reference Manual, publication 1766-RM001, for the MicroLogix 1400 instruction set and for application examples to show the instruction set in use. See your RSLogix 500®/RSLogix™ Micro programming software user documentation for more information on programming your MicroLogix 1400 controller.

Download Firmware, AOP,

EDS, and Other Files

Download firmware, associated files (such as AOP, EDS, and DTM), and access product release notes from the Product Compatibility and Download Center at rok.auto/pcdc.

Summary of Changes This publication contains the following new or updated information. This list includes substantive

updates only and is not intended to reflect all changes.

Additional Resources These documents contain additional information concerning related products from Rockwell

Automation.

Topic Page Updated template throughout Added 1762 Expansion I/O Specifications 134 Updated Certifications 135

Additional Resources

Resource Description MicroLogix 1400 Programmable Controllers Reference Manual, publication 1766-RM

Information on the MicroLogix 1400 Controllers instruction set.

MicroLogix 1400 Programmable Controllers Installation Instructions, publication 1766 -IN

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

Advanced Interface Converter (AIC+) User Manual, publication 1761-UM004 A description on how to install and connect an AIC+. This manual also contains information on network wiring. DeviceNet Interface User Manual, publication 1761-UM005 Information on how to install, configure, and commission a DeviceNet® Interface. DF1 Protocol and Command Set Reference Manual, publication 1770-6.5.16 Information on DF1 open protocol. Modbus Protocol Specifications available from www.modbus.org Information about the Modbus protocol. Distributed Network Protocol (DNP3) Specifications Available from www.dnp.org Information about the Distributed Network Protocol.

System Security Design Guidelines Reference Manual, publication SECURE-RM

Provides guidance on how to conduct security assessments, implement Rockwell Automation® products in a secure system, harden the control system, manage user access, and dispose of equipment.

UL Standards Listing for Industrial Control Products, publication CMPNTS-SR002 Assists original equipment manufacturers (OEMs) with construction of panels, to help ensure that they conform to the requirements of Underwriters Laboratories. American Standards, Configurations, and Ratings: Introduction to Motor Circuit Design, publication IC-AT

Provides an overview of American motor circuit design based on methods that are outlined in the NEC.

Chapter 1

Hardware Overview

Hardware Features The MicroLogix 1400 programmable controller contains a power supply, input and output circuits, a

processor, an isolated combination RS-232/RS-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-L32AWAA, and 1766-L32BXBA only).

Figure 1 shows the hardware features of the controller.

Figure 1 - Controller Hardware Features

ESC

OK

Left side view Top view

Controller Description

Description Description 1 Comm port 2 – 9-pin D-shell RS-232C connector 8 Battery connector 2 Memory module 9 Output terminal block 3 User 24V (for 1766-BWA and 1766-BWAA only) 10 LCD display 4 Input terminal block 11 Status indicator panel 5 LCD display keypad (ESC, OK, Up, Down, Left, Right) 12 Comm port 1 – RJ45 connector 6 Battery compartment 13 Comm port 0 – 8-pin mini DIN RS-232C/RS-485 connector 7 1762 expansion bus connector

Chapter 1 Hardware Overview

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.

Figure 2 - 1766-MM1 Memory Module

Controller Input and Output Description

Catalog Number

Description

Input Power User Power Embedded Discrete I/O Embedded Analog I/O Comm. Ports

1766-L32BWA

100/240V AC

24V DC

12 fast 24V DC inputs 8 normal 24V DC inputs 12 relay outputs

None

1 RS-232/RS-485 (1)

1 Ethernet 1 RS-232(2)

1766-L32AWA

None

20 120V AC inputs 12 relay outputs

1766-L32BXB 24V DC

12 fast 24V DC inputs 8 normal 24V DC inputs 6 relay outputs 3 fast DC outputs 3 normal DC outputs

1766-L32BWAA

100/240V AC

24V DC

12 fast 24V DC inputs 8 normal 24V DC inputs 12 relay outputs

4 voltage inputs 2 voltage outputs

1766-L32AWAA

None

20 120V AC inputs 12 relay outputs

1766-L32BXBA 24V DC

12 fast 24V DC inputs 8 normal 24V DC inputs 6 relay outputs 3 fast DC outputs 3 normal DC outputs

(1) Isolated RS-232/RS-485 combo port. (2) Non-isolated RS-232. Standard D-sub connector

M Mod ule em^ o^ ry

Chapter 1 Hardware Overview

Programming Program the MicroLogix 1400 controller using RSLogix 500/RSLogix Micro software, version 8.10.

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

Firmware Revision History

Features are added to the controllers through firmware updates. Use the listing in Table 1 to be sure that your controller’s firmware is at the level you need. Firmware updates are not required, but they allow you to access to the new features.

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 with a 1761-CBL-AM (8-pin mini-DIN to 8-pin mini-DIN) cable or equivalent. This type of connection damages the RS-232/RS-485 communication port (Channel 0) of the MicroLogix 1400 and/or the controller itself. The communication pins that are 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.

Table 1 - MicroLogix 1400 Controllers

Catalog Number

OS (1)

Series Letter

OS Revision Letter

OS

Firmware Release Number

Release Date Enhancement

1766-L32AWA

1766-L32BWA

1766-L32BBB

A A FRN1 August 2005 Initial product release

A B FRN2 October 2005 According to the SRAM component, MicroLogix 1400 could cause Hard-fault at the start of the Operating System in a very high temperature environment. Corrected. A C FRN3 February 2006 Added Data file write feature through web server.

1766-L32AWA

1766-L32BWA

1766-L32BBB

B A FRN4 February 2007

• Direct connection to RS-485 Network for DF1 half-duplex master driver
• Direct connection to RS-485 Network for DF1 half-duplex slave driver
• Direct connection to RS-485 Network for ASCII driver
• Selectable Stop/Data Bits for Modbus master RTU driver
• Selectable Stop/Data Bits for Modbus slave RTU driver
• Selectable Stop/Data Bits for ASCII driver
• Settable Inactivity Timeout feature for Ethernet driver
• Unsolicited Ethernet messaging to RSLinx® OPC topic
• CIP™ Generic messaging through the Ethernet port
• Unconnected EtherNet/IP protocol for Ethernet driver
• IP conflict detection mechanism
• Email feature
• Ethernet MSG break bit
• DNS functionality when the email feature is used
• Change IP address with Ethernet MSG instruction
• ST file type for all PCCC commands
• HSC (High-Speed Counter) up to 40 KHz
• PTO/PWM up to 40 KHz
• 2-channel Analog Input Filter
• Web View Disable for Data Files

1766-L32AWA

1766-L32BWA

1766-L32BBB

B B FRN5 May 2007

• Fixed anomaly for CIP Messaging Error when CIP Service Code is 4Bh or 4Ch.
• Fixed anomaly for the EtherNet/IP List Identity reply.
• Fixed anomaly for window size error in TCP/IP stack.
• Improved system interrupt delay time.

1766-L32DWD B B FRN5 May 2007 • Initial Product release. Supports the features that are listed above for the 1766- L32AWA, 1766-L32BWA, and 1766-L32BBB controllers.

(1) OS = Operating system

Chapter 1 Hardware Overview

Communication Options MicroLogix 1400 controllers provide three communications ports: an isolated combination RS-232/

RS-485 communication port (Channel 0), an Ethernet port (Channel 1), and a non-isolated RS- communication port (Channel 2).

You can connect Channel 0 and Channel 2 ports on the MicroLogix 1400 controller to the following:

• Operator interfaces, personal computers, and so on, with 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
• 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 an RS-485 network with DH-485, DF1 half-duplex master/slave, Modbus RTU master/slave, or DNP3 slave protocols, you can connect the MicroLogix 1400 controller 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.

You can also connect the controller to serial devices, such as barcode readers, weigh scales, serial printers, and other intelligent devices, using ASCII. See Default Communication Configuration on page 57 for the configuration settings for Channel 0. MicroLogix 1400 controller can be connected directly to the 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 that allows 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 how to connect to the available communication options.

Chapter 2

Install Your Controller

Installation Considerations Most applications require installation in an industrial enclosure (Pollution Degree 2

(a) ) to reduce the effects of electrical interference (Over Voltage Category II(b)^ ) 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 Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.

Safety Considerations Safety considerations are an important element of proper system installation. Actively considering

the safety of yourself and others, and 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.

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

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.

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.

Chapter 2 Install Your Controller

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

Disconnect Main Power

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 that is controlled by a controller.

Safety Circuits

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, which removes 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:

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 501-10(b) and/or in accordance with Section 18-1J2 of the Canadian Electrical Code, and in accordance with the authority having jurisdiction.
• For applicable equipment (for example, relay modules), exposure to some chemicals may degrade the sealing properties of the materials that are used in these devices:
  • Relays, epoxy It is recommended that you periodically inspect these devices for any degradation of properties and replace the module if degradation is found.

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

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

WARNING: Explosion Hazard Do not connect or disconnect connectors while the circuit is live.