Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 9)

Controller Components
Chapter 2
2Ć4
Battery Pack
The Battery Pack (Cat. No. 1771-BB) is shipped standard with the System
Power Supply and consists of:
A metal Battery Housing (Cat. No. 1771-BH)
A mounting Hardware Set (Cat. No. 1771-BX)
Two D-size alkaline batteries (Cat. No. 1771-BA)
An optional lithium battery (Cat. No. 1770-XO) can be ordered for use with the
Battery Pack, is preferred.
The Battery Pack provides a convenient form of RAM memory backup power
to the Processor when power from the System Power Supply is interrupted. It
provides this memory backup power when the Processor is seated in the
left-most slot of the I/O chassis. An external Battery Pack can also maintain
memory content when the Processor is removed from the I/O Chassis. This is
done by connecting them together with the Mini-Processor Transport Cable
(Cat. No. 1772-CD) as shown in Figure 2.3.
I/O Power Cable
An I/O Power Cable (Figure 2.1) is used to connect the System Power Supply
and the Battery Pack to the I/O Chassis. To accommodate two Power Supply
mounting configurations, this cable is available in two lengths:
Cat. No. 1771-CL I/O Power Cable (1 ft/30.5 cm)
Cat. No. 1771-CM I/O Power Cable (5 ft/1.5 m)