Battery & Energy Pack Manual
Chapter 1
GFK-2741J Oct 2019
Introduction 1
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:
•
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.
1.1 Revisions in this Manual
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.
Added section on super capacitors.
Updated for CPE302, CPE100, CPE115.
Format update includes captions for figures and table of figures.
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