14 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Chapter 1          Hardware Overview
 
Component Descriptions MicroLogix 1400 Memory Module and Built-in Real-Time Clock
The controller has a built-in real-time clock to provide a reference for 
applications that need time-based control.
The controller is shipped with a memory module port cover in place. You can 
order a memory module, 1766-MM1, as an accessory. The memory module 
provides optional backup of your user program and data, and is a means to 
transport your programs between controllers. 
The program and data in your MicroLogix 1400 is non-volatile and is stored 
when the power is lost to the controller. The memory module provides 
additional backup that can be stored separately. The memory module does not 
increase the available memory of the controller.
Figure 1 - 1766-MM1 Memory Module
Controller Input and Output Description
Catalog Number
Description
Input 
Power
User 
Power
Embedded 
Discrete I/O
Embedded Analog 
I/O
Comm. Ports
1766-L32BWA
100/240V AC
24V DC
12 Fast 24V DC Inputs
8 Normal 24V DC Inputs
12 Relay Outputs
None
1 RS-232/RS-485
(1)
 
1 Ethernet
1 RS-232
(2)
1766-L32AWA
None
20 120V AC Inputs
12 Relay Outputs
1766-L32BXB 24V DC
12 Fast 24V DC Inputs
8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs
1766-L32BWAA
100/240V AC
24V DC
12 Fast 24V DC Inputs
8 Normal 24V DC Inputs
12 Relay Outputs
4 Voltage Inputs
2 Voltage Outputs
1766-L32AWAA
None
20 120V AC Inputs
12 Relay Outputs
1766-L32BXBA 24V DC
12 Fast 24V DC Inputs
8 Normal 24V DC Inputs
6 Relay Outputs
3 Fast DC Outputs
3 Normal DC Outputs
(1) Isolated RS-232/RS-485 combo port.
(2) Non-isolated RS-232. Standard D-sub connector