Rockwell Automation Publication 1766-UM001O-EN-P - September 2021 149
Appendix B
Replacement Parts
MicroLogix 1400 
Replacement Kits
The table below provides a list of replacement parts and their catalog number.
Lithium Battery (1747-BA) 
Installation 
Follow the procedure below to ensure proper replaceable battery installation.
1. Insert a battery into the battery pocket with wires facing up.
2. Insert the battery wire connector into the battery connector.
3. Secure the battery connector wires around the 1762 expansion bus 
connector as shown in Figure 66 on page 150
.
Topic Page
MicroLogix 1400 Replacement Kits 149
Lithium Battery (1747-BA) 149
Description Catalog Number
Lithium Battery 1747-BA
IMPORTANT When the controller’s Battery Low indicator is lit, check whether the battery 
wire connector is connected correctly or replace the replaceable battery 
with a new one immediately. When the indicator turns on, it means that 
either the battery is disconnected, or that the battery requires 
replacement. The controller is designed to operate for up to 2 weeks, from 
the time that the indicator first turns on. We recommend that you replace 
the battery immediately when the indicator turns on.