Specifications

ControlLogix™ Controller and Memory Board 21
Publication
1756-IN101H-EN-P - June 2003
Connect a Battery
To maintain the memory of the controller while the controller is
without power, either use nonvolatile memory or connect a battery:
To connect a 1756-BATM battery module, see the ControlLogix
Battery Module Installation Instructions, publication 1756-IN576.
!
WARNING
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, including handling and disposal of
leaking batteries, see Guidelines for Handling
Lithium Batteries, publication AG 5-4.
ATTENTION
!
Connect only a 1756-BA1 battery or a 1756-BATM
battery module to the controller. If you connect a
different battery, you may damage the controller.
If your controller: And you want to: Then:
has nonvolatile
memory
A battery is permitted but not
required.
does not have
nonvolatile
memory
maintain memory only while the
controller is in the chassis
Connect a 1756-BA1 battery or
a 1756-BATM battery module.
maintain memory while the
controller is out of the chassis
Connect a 1756-BA1 battery.