Rockwell Automation 1756-CN2, 1756-CN2R User Manual

Installation Instructions

ControlLogix ControlNet Interface Module

Catalog Numbers 1756-CN2, 1756-CN2R, Series B

Topic	Page
Important User Information	2
European Hazardous Location Approval	3
North American Hazardous Location Approval	4
Environment and Enclosure	5
Prevent Electrostatic Discharge	5
The ControlNet Interface Module and Redundant Media	6
Understanding Standalone and Redundant Control	6
Example Redundant System	7
Before You Begin	8
Parts List	8
Identify Module Features	9
Set the Module’s Network Address Switches	10
Reset the Module to the Original Factory Settings	10
Keeper Configuration - Automatic Keeper Crossload	11
Prepare the Chassis for Module Installation	12
Determine Module Slot Location	12
Install the Module	13
Connect the Module to the Network	14
Remove the Module	18
Install or Remove the Module Under Power	18
Install the EDS File	19
Configure RSLinx Software to Use the USB Port	20
Set Up the USB Driver	21
Status Indicators	22
Module Status Indicator and Display	23
ControlNet Channel Status Indicators	29
Specifications	31
Additional Resources	35

2 ControlLogix ControlNet Interface Module

Important User Information

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 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com) describes some 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.

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

SHOCK HAZARD

Labels may be on or inside the equipment (for example, drive or motor) to alert people that dangerous voltage may be present.

BURN HAZARD

Labels may be on or inside the equipment (for example, drive or motor) to alert people that surfaces may reach dangerous temperatures.

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ControlLogix ControlNet Interface Module 3

European Hazardous Location Approval

European Zone 2 Certification

(The following applies when the product bears the EEx Marking.)

This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC.

The Laboratoire Central des Industries Electriques (LCIE) certifies that this equipment has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in potentially explosive atmospheres, given in Annex II to this Directive. Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15.

This equipment is not resistant to sunlight or other sources of UV radiation.

IMPORTANT

This equipment must be installed in an enclosure providing at least IP54 protection when applied in Class I, Zone 2 environments.

This equipment shall be used within its specified ratings defined by Allen-Bradley.

Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 40% when applied in Class I, Zone 2 environments.

This equipment must be used only with ATEX certified backplanes.

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4 ControlLogix ControlNet Interface Module

North American Hazardous Location Approval

The following information applies when							Informations sur l’utilisation de cet
operating this equipment in hazardous							équipement en environnements dangereux.
locations.
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for							Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
use in Class I Division 2 Groups A, B, C, D, Hazardous							conviennent qu'à une utilisation en environnements de
Locations and nonhazardous locations only. Each product is							Classe I Division 2 Groupes A, B, C, D dangereux et non
supplied with markings on the rating nameplate indicating							dangereux. Chaque produit est livré avec des marquages sur
the hazardous location temperature code. When							sa plaque d'identification qui indiquent le code de
combining products within a system, the most adverse							température pour les environnements dangereux. Lorsque
temperature code (lowest "T" number) may be used to help							plusieurs produits sont combinés dans un système, le code de
determine the overall temperature code of the system.							température le plus défavorable (code de température le plus
Combinations of equipment in your system are subject to							faible) peut être utilisé pour déterminer le code de
investigation by the local Authority Having Jurisdiction at							température global du système. Les combinaisons
the time of installation.							d'équipements dans le système sont sujettes à inspection par
							les autorités locales qualifiées au moment de l'installation.
					EXPLOSION HAZARD -						RISQUE D’EXPLOSION –
	WARNING						AVERTISSEMENT
					• Do not disconnect equipment unless						• Couper le courant ou s'assurer
					power has been removed or the						que l'environnement est classé
					area is known to be nonhazardous.						non dangereux avant de
					• Do not disconnect connections to						débrancher l'équipement.
					this equipment unless power has						• Couper le courant ou s'assurer
					been removed or the area is known						que l'environnement est classé
					to be nonhazardous. Secure any						non dangereux avant de
					external connections that mate to						débrancher les connecteurs. Fixer
					this equipment by using screws,						tous les connecteurs externes
					sliding latches, threaded						reliés à cet équipement à l'aide
					connectors, or other means						de vis, loquets coulissants,
					provided with this product.						connecteurs filetés ou autres
					• Substitution of components may						moyens fournis avec ce produit.
					impair suitability for Class I,						• La substitution de composants
					Division 2.						peut rendre cet équipement
					• If this product contains batteries,						inadapté à une utilisation en
					they must only be changed in an						environnement de Classe I,
					area known to be nonhazardous.						Division 2.
											• S'assurer que l'environnement est
											classé non dangereux avant de
											changer les piles.

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ControlLogix ControlNet Interface Module 5

Environment and Enclosure

	ATTENTION	This equipment is intended for use in a Pollution Degree 2 industrial environment, in
		overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes
		up to 2000 meters (6562 feet) without derating.

This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance.

This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or minimize the spread of flame, complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if non-metallic. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.

In addition to this publication, see:

Industrial Automation Wiring and Grounding Guidelines, for additional installation requirements, Allen-Bradley publication 1770-4.1.

NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure.

Prevent Electrostatic Discharge

	ATTENTION	This equipment is sensitive to electrostatic discharge, which can cause internal damage
		and affect normal operation. Follow these guidelines when you handle this equipment:

• Touch a grounded object to discharge potential static.

•Wear an approved grounding wriststrap.

•Do not touch connectors or pins on component boards.

•Do not touch circuit components inside the equipment.

•Use a static-safe workstation, if available.

•Store the equipment in appropriate static-safe packaging when not in use.

For additional information, refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.

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6 ControlLogix ControlNet Interface Module

The ControlNet Interface Module and Redundant Media

Use the 1756-CN2 ControlLogix ControlNet series B module if redundant media is not necessary. Applications requiring redundant media must use the 1756-CN2R module.

Understanding Standalone and Redundant Control

You can use the 1756-CN2R series B modules for standalone or redundant control. For standalone control, only one set of modules is required. For redundant control, two ControlLogix chassis are populated with identical pairs of modules called partners. The chassis that performs active control is called the primary chassis and the modules in the chassis are called primary modules. The other chassis is called the secondary chassis and the modules in the chassis are called secondary modules.

These installation instructions discuss both standalone and redundant control; read them carefully to distinguish the procedures and requirements for each type of control.

IMPORTANT

If you use redundant control, you must select the same ControlNet network address for each set of partner modules (primary and secondary). You must also place the partner modules in the same corresponding slots in their respective redundant-control chassis pair.

For more redundancy information, refer to the ControlLogix Redundancy System User Manual, publication 1756-UM523F.

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ControlLogix ControlNet Interface Module 7

	Example Redundant System
	Primary	1756-RM Module
		1756-CN2R Module
	Chassis
	Redundant
	Control Chassis
	Pair
	Secondary	1756-RM Module
	Chassis	1756-CN2R Module
		1756-CNB/CNBR
	Remote I/O Chassis	1756-CN2 Module
		1756-CN2R Module
		ControlNet
		Network

IMPORTANT

The 1756-CN2 and 1756-CN2R series B modules are supported in both the local chassis (primary and secondary) and the remote chassis (I/O chassis) of a ControlLogix redundancy system, revision 16.5x.

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8 ControlLogix ControlNet Interface Module

Before You Begin

Before you install the module, make sure you know how to handle the module. Refer to Prevent Electrostatic Discharge on page 5.

Parts List

You need all of the components shown.

1756-CN2 or 1756-CN2R		1756-A4, 1756-A7, 1756-A10,			1756-PA72, 1756-PA75,
					1756-PB72, or 1756-PB75
	Module	1756-A13, or 1756-A17 Chassis
					Power Supply
A	B A
1786-TPR, 1786-TPS,
1786-TPYR, or 1786-TPYS Taps(1)			USB Cable (optional)	(2)	Small Screwdriver

-

(1) 1786-TPS or 1786-TPYS taps are recommended for network connections.

(2)	1756-CN2 and 1756-CN2R, series A modules use the 1786-CP cable. However, 1756-CN2 and 1756-CN2R,
	series B modules use a USB cable for temporary network connections.

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ControlLogix ControlNet Interface Module 9

Identify Module Features

These are the hardware components of the 1756-CN2 and 1756-CN2R

series B bridge modules.

Module Status

Alphanumeric

Display

ControlNet	COAX	Module
Channel		Status
Status		Indicator
Indicators
USB Port

Channel A Channel B BNC Connector

BNC Connector

(1756-CN2R only) Front View

Network Address Switches

(not shown) See page 10.

Backplane

Connector

00 -

Factory Reset on Power Up

(Invalid Network Address)

01 - 99

Normal Operation (Valid Network Address)

Side View

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10 ControlLogix ControlNet Interface Module

Set the Module’s Network Address Switches

Use a small screwdriver to set the module’s network address switches. For modules in a standalone chassis, you must specify a unique ControlNet network address. You can select an address of 01...99 for modules in a standalone chassis. Address 00 is an invalid ControlNet address.

Side of Module

Top of Module

Front of Module

This module’s network address is 23.

Reset the Module to the Original Factory Settings

To reset the module to its original settings and clear all keeper

information (see page 11), complete the following steps.

	IMPORTANT	The following procedure instructs you to remove power from the chassis
		before removing the module. This is only necessary if the module is in a
		Class I, Division 2 hazardous location. For more information, see Install or
		Remove the Module Under Power on page 18.

1.Remove power from the chassis.

2.Remove the module from the chassis.

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	ControlLogix ControlNet Interface Module 11
3. Reset the switches to 00.
	Do not use the 00 switch setting during normal module operation.
IMPORTANT

4.Replace the module in the chassis.

5.Apply power to the chassis.

6.After the module status display reads, "Reset Complete-Change Switch Settings," remove power from the chassis.

7.Remove the module from the chassis.

8.Set the switches to their final value.

9.Replace the module in the chassis.

10.Apply power to the chassis.

Keeper Configuration - Automatic Keeper Crossload

The 1756-CN2 series B module is a keeper capable module. This means that, if the module has a valid configuration and has the lowest address among the keeper capable nodes on the network, it becomes the Master Keeper. The Master Keeper is the node that distributes network configuration information to other nodes as the network is formed or as nodes are added to the network.

When the module is first removed from the box, or is reset to the original factory settings, it will automatically attempt to crossload configuration information from the current Master Keeper. If a Master Keeper with a valid network configuration is present on the network, the configuration crossload will succeed; no user configuration is needed. However, if a Master Keeper does not exist, or does not have a valid network configuration, you must use RSNetWorx for ControlNet to download the network configuration information.

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