Rockwell Automation 1757-BEM User Manual

Installation Instructions

ProcessLogix Battery Extension Module

Cat. No. 1757-BEM

This document explains how to install the Battery Extension Module (1757-BEM) into the
ProcessLogix™ System.

Top ic Page

Important User Information 2

North American Hazardous Location Approval 3

1757-BEM Functionality 6

Self Test Circuitry 6

RIUP Support 7

Available Battery Power 7

Recommended Configuration 8

Battery Pack 7

Switchover Circuitry 8

Understanding the Electrical Design 8

Installing the Battery into the Battery Extension Module 10

Determining the 1757-BEM Chassis Slot Location 11

Installing the 1757-BEM into the Chassis 12

Wiring the 1757-BEM Status Connector 13

Specifications 14

Rockwell Automation Support Backcover

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2 ProcessLogix Battery Extension 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://www.ab.com/manuals/gi) 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 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.

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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

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

• recognize the consequence

Labels may be located on or inside the module to alert people that dangerous voltage
may be present.

Labels may be located on or inside the module to alert people that surfaces may be
dangerous temperatures.

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ProcessLogix Battery Extension Module 3

North American Hazardous Location Approval

The following information applies when
operating this equipment in hazardous
locations:

Products marked “CL I, DIV 2, GP A, B, C, D” are
suitable for use in Class I Division 2 Groups A, B, C,
D, Hazardous Locations and nonhazardous locations
only. Each product is supplied with markings on the
rating nameplate indicating the hazardous location
temperature code. When combining products within
a system, the most adverse temperature code (lowest
“T” number) may be used to help determine the
overall temperature code of the system.
Combinations of equipment in your system are
subject to investigation by the local Authority Having
Jurisdiction at the time of installation.

WARNING

EXPLOSION HAZARD

• Do not disconnect
equipment unless
power has been
removed or the area is
known to be
nonhazardous.

• Do not disconnect
connections to this
equipment unless
power has been
removed or the area is
known to be
nonhazardous. Secure
any external
connections that mate
to this equipment by
using screws, sliding
latches, threaded
connectors, or other
means provided with
this product.

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

• If this product contains
batteries, they must
only be changed in an
area known to be
nonhazardous.

Informations sur l’utilisation de cet équipement
en environnements dangereux :

Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
conviennent qu’à une utilisation en environnements
de Classe I Division 2 Groupes A, B, C, D dangereux
et non dangereux. Chaque produit est livré avec des
marquages sur sa plaque d’identification qui
indiquent le code de température pour les
environnements dangereux. Lorsque plusieurs
produits sont combinés dans un système, le code de
température le plus défavorable (code de
température le plus faible) peut être utilisé pour
déterminer le code de température global du
système. Les combinaisons d’équipements dans le
système sont sujettes à inspection par les autorités
locales qualifiées au moment de l’installation.

AVERTISSEMENT

RISQUE D’EXPLOSION

• Couper le courant ou
s’assurer que
l’environnement est
classé non dangereux
avant de débrancher
l'équipement.

• Couper le courant ou
s'assurer que
l’environnement est
classé non dangereux
avant de débrancher les
connecteurs. Fixer tous
les connecteurs
externes reliés à cet
équipement à l'aide de
vis, loquets coulissants,
connecteurs filetés ou
autres moyens fournis
avec ce produit.

• La substitution de
composants peut rendre
cet équipement
inadapté à une
utilisation en
environnement de
Classe I, Division 2.

• S’assurer que
l’environnement est
classé non dangereux
avant de changer les
piles.

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4 ProcessLogix Battery Extension Module

IMPORTANT

WARNING

WARNING

The Control Processor contains a non-rechargeable lithium battery
(catalog no. 1757-PLXBAT) that provides memory backup time of 6
days (with a fully-charged battery). Ideally, you should remove the
lithium battery when a 1757-BEM (NI-CD) is also present (to prevent
it from being needlessly depleted), but both may be present in the
controller chassis. If both batteries are present, the BAT LED will turn
red instead of green when the CPM goes through startup diagnostics
and enters the IDLE state.

Battery Handling

When you connect or disconnect the battery 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.

For Safety information on the handling of lithium batteries, such as the
1757-PLXBAT, including handling and disposal of leaking batteries, see
Guidelines for Handling Lithium Batteries, publication AG 5-4.

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.

Removal and Insertion Under Power (RIUP):

• When you insert or remove the module while backplane 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. 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.

Removable Terminal Blocks (RTB) for I/O connections:

• 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.

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ProcessLogix Battery Extension Module 5

ATTENTION

ATTENTION

Environment and Enclosure

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 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 pr event personal injury resulting from accessibility to live parts. 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.

See NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure. Also, see the appropriate sections in this
publication, as well as the Allen-Bradley publication 1770-4.1 (“Industrial
Automation Wiring and Grounding Guidelines”), for additional
installation requirements pertaining to this equipment.

Preventing Electrostatic Discharge

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.

• If available, use a static-safe workstation.

• When not in use, store the equipment in appropriate static-safe

packaging.

Publication 1757-IN093B-EN-P - April 2004