Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 25)

Mini-PLC-2/15 System:
An Overview
Chapter 3
3Ć6
Terminal Strip
Purpose: Provides wire connections for the power supply module.
Hardware: Terminals L1 and L2 label the AC input connections.
Battery Backup
Purpose: Provides battery backup power for the processor’s memory.
Power Supply: Two alkaline D size battery cells or one D size lithium battery
cell.
Function: Guards against the loss of memory if the:
AC power line fails
Power supply fails
Transport Cable
Purpose: Allows the controller to be moved from the I/O chassis without
memory loss.
Function: It electrically connects the battery pack of the system power supply
to the processor module for transporting.
Hardware: Cat. no. 1772-CD transport cable (2 ft/6 cm)
CAUTION: Do not remove the processor module or install the
processor module when the system’s power is on. This could
alter memory content and you must re-enter your program.
Switch Group Assembly
Purpose: Determines output response to a malfunction detected by the
controller.
Location: Left side of the I/O chassis backplane.
Quantity: 8 per switch group assembly. Switches 2-8 are not used with this
controller.
Response:
On indicates that the outputs are left in their last state when a fault is
detected. machine operation can continue after fault detection.