Chapter 1: Introduction; Revisions In This Manual - Emerson PACSystems RX3i Manual

Battery & Energy Pack Manual
GFK-2741J

Chapter 1: Introduction

Many PACSystems CPUs require a battery, an energy pack or a supercapacitor array to back
up volatile memory. This memory is separate from the non-volatile flash memory. This
manual covers the technologies used to back up volatile memory on PACSystems RSTi-EP,
RX3i and RX7i CPUs, and RXi Controllers. Other manuals and documents published by
Emerson may discuss memory retention technologies in passing. However, when it comes
to energy sources used by PACSystems to back up volatile memory, this manual should be
considered the definitive source.
Other methods of retaining volatile memory, such as real-time clock batteries, are not
covered by this manual. Note, however, that RX7i CPUs use the same battery mechanism to
back up the calendar clock and user memory.
This manual includes:
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1.1

Revisions in this Manual

Rev
J
H
G
F
E
D
C
Introduction
A battery selection guide, information on battery life and usage, disposal
instructions, and agency compliance
RXi Energy Pack specifications, installation, operation, and service and
maintenance.
A list of CPUs which rely on supercapacitor technology.
Date Description
Oct 2019 Following Emerson's acquisition of this product, changes have been made to
apply appropriate branding and registration of the product with required
certification agencies. No changes to material, process, form, fit or
functionality.
Aug-2018 Updated for CPL410.
May 2018 Added data retention for various modules (Refer Section 2.2).
Mar-2018 Added section on super capacitors.
Updated for CPE302, CPE100, CPE115.
Format update includes captions for figures and table of figures.
Dec-2016 Addition of IC695ACC403.
Jun-2015 Corrections & clarifications.
Mar-2015 Addition of IC695ACC402.
Chapter 1
Oct 2019
1