Allen-Bradley ControlLogix DeviceNet 1756-DNB User manual

Publication 1756-IN566B-EN-P - April 2001
Installation Instructions
ControlLogix DeviceNet
Scanner Module
Catalog Number 1756-DNB
Use this manual as a guide to install the ControlLogix™ DeviceNet™
Scanner Module. The following table identifies what this manual
contains and where to find specific information.
Topic See Page
European Communities (EC) Directive Compliance 3
Preventing Electrostatic Discharge 4
Understand the Module’s Software Features 5
Identify Module Components 6
Prepare to Install the Module 7
Installing or Removing the Module Under Power 8
Determine Module Slot Location 9
Install the Module 10
Remove or Replace the Module 11
Wire the DeviceNet Connector 12
Connect the Module to the DeviceNet Network 13
Apply Chassis Power 13
Using the Manual Configuration Pushbutton 14
Interpreting the Alphanumeric Display 16
Interpreting the LED Status Indicators 19
ControlLogix Controller Interface 21
Hazardous Location Information 25
Specifications 27
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Throughout this manual we use the following notes to make you
aware of safety considerations:
Warning and Attention statements help you to:
•identify a hazard
•avoid a hazard
•recognize the consequences
We use the following note to call attention to critical information:
Change bars are used to indicate information that has changed or
been added since the previous version of these instructions.
WARNING
!
Identifies information about practices or
circumstances that have the potential to create an
explosion hazard.
ATTENTION
!
Identifies information about other practices or
circumstances that can lead to personal injury or
death, property damage or economic loss.
IMPORTANT
Identifies information that is critical for successful
application and understanding of the product.

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European Communities (EC) Directive Compliance
If this product has the CE mark it 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 the Council Directive 89/336/EC
Electromagnetic Compatibility (EMC) by applying the following
standards, in whole or in part, documented in a technical
construction file:
•EN 50081-2 EMC — Generic Emission Standard, Part 2 —
Industrial Environment
•EN 50082-2 EMC — Generic Immunity Standard, Part 2 —
Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low
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,
publication 1770-4.1
•Automation Systems Catalog, publication B113
Open style devices must be provided with environmental and safety
protection by proper mounting in enclosures designed for specific
application conditions. See NEMA Standards publication 250 and IEC
publication 529, as applicable, for explanations of the degrees of
protection provided by different types of enclosure.
Allen-Bradley

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Publication 1756-IN566B-EN-P - April 2001
Enclosure and Environmental Requirements Specific To This Product
This product must be mounted within a suitable system enclosure to
prevent personal injury resulting from accessibility to live parts. The
interior of this enclosure must be accessible only by the use of a tool.
This industrial control equipment is intended to operate in a Pollution
Degree 2 environment, in overvoltage category II applications, (as
defined in IEC publication 664A) at altitudes up to 2000 meters
without derating.
Preventing Electrostatic Discharge
The DeviceNet scanner module is sensitive to electrostatic discharge.
ATTENTION
!
This module is sensitive to electrostatic discharge.
Electrostatic discharge can damage integrated
circuits or semiconductors if you touch backplane
connector pins. Follow these guidelines when you
handle the module:
•Touch a grounded object to discharge static
potential.
•Wear an approved wrist-strap grounding
device.
•Do not touch the backplane connector or
connector pins.
•Do not touch circuit components inside the
module.
•If available, use a static-safe work station.
•When not in use, keep the module in its
static-shield bag.

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Understand the Module’s Software Features
The 1756-DNB module has the software features described in the
following sections. You activate these features by using RSNetWorx
for DeviceNet™ software (catalog no. 9357-DNETL3). For more
information, refer to the appropriate RSNetWorx for DeviceNet
documentation, and to the 1756-DNB Scanner User Manual,
publication 1756-UM515C-EN-P.
Slave Mode
The slave mode feature allows processor-to-processor
communication. It does this by allowing the scanner to perform as a
slave device to another master on the network.
Like other slaves, the scanner module exchanges data with only one
master when it is in slave mode. You control what information is
exchanged through the scan list configuration and associated
mapping functions of RSNetWorx for DeviceNet software.
The 1756-DNB can function in the following modes:
Change of State
The scanner module can send and receive data on a change of state
basis with slave devices that also have this feature. Data is sent:
•whenever a data change occurs, or
•at a user-configurable heartbeat rate
Scanner is in this mode when it
Null contains an empty or disabled scan list (out-of-box default).
Master serves as a master to one or more slaves but is not
simultaneously serving as a slave to another master.
Slave serves as a slave to another master.
Dual serves as both a master to one or more slaves and as a slave to
another master simultaneously.
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Change of state increases system performance by reducing network
traffic, since data is only sent on an as-needed basis. Use RSNetWorx
for DeviceNet software to activate this feature.
Cyclic I/O
The scanner module can send and receive data on a cyclic basis with
slave devices that also have this feature.
Cyclic I/O increases system performance by reducing network traffic,
since data is only sent at a user-configurable rate. Use RSNetWorx for
DeviceNet software to activate this feature.
Identify Module Components
Use the following figure to identify the external components of the
module.
DeviceNet TM
MOD/NET I/O OK
Backplane
Connector
Product
Label
Front View
Side View
Front
Panel
Wiring
DeviceNet
Connector
Health and
Status Indicators
Label
Color
Codes
Door

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Prepare to Install the Module
Before you install the module, make sure that you have these
components.
1756-DNB module 1756-A4, 1756-A7, or 1756-A10 chassis 1756-PA72/75 or 1756-PB72/75
power supply
DeviceNet open-style or
10-position connector
DeviceNet truck
small screwdriver
or drop cable
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8ControlLogix DeviceNet Scanner Module
Publication 1756-IN566B-EN-P - April 2001
Installing or Removing the Module Under Power
This module is designed to be installed or removed while chassis
power is applied.
Prepare the Chassis for Module Installation
Before you install the module, you must install and connect a
ControlLogix chassis and power supply. A 4-slot chassis with a power
supply is shown below.
WARNING
!
When you insert or remove a module while
backplane power is on, 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 device causing unintended machine
motion or loss of process control
•causing an explosion in a hazardous
environment
Repeated electrical arcing causes excessive wear
to contacts on both the module and its mating
connector. Worn contacts may create electrical
resistance that can affect module operation.
1756-A4
Chassis
Power
Supply

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For information on installing these products, refer to the publications
listed in the following table.
Determine Module Slot Location
This figure shows chassis slot numbering in a 4-slot chassis. Slot 0 is
the first slot and is always located to the right of the power supply.
You can use any size ControlLogix chassis and install the module in
any slot. You can also install multiple 1756-DNB modules in the same
chassis. You can install as many modules as your power supply can
accommodate (i.e., number for which the power supply is rated).
Chassis
Type
Chassis
Installation
Power
Supply
Power Supply
Installation
Series B: 1756-A4, -A7, -A10, -A13 Pub. No.
1756-IN080
1756-PA72/B Pub. No.
1756-5.67
1756-PB72/B
1756-PA75/A Pub. No.
1756-5.78
1756-PB75/A
Power Supply
Slot 0
Slot 1
Slot 2
Slot 3
Chassis
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Install the Module
POWER
1
2
3
Align the circuit board with top
and bottom guides in the chassis.
Circuit board
Slide the module into the chassis.
Make sure the module properly connects
to the chassis backplane.
The module is fully installed
when it is flush with the power
supply or other installed modules.