CompactLogix deprecated controllers

Now that we have introduced the CompactLogix product line, it is time to dive into the wide range of form factors and varying features available. In this first section, we will discuss the CompactLogix controllers that have reached the end of their life cycle and are no longer supported by Rockwell Automation. It is important to identify these controllers as it is still quite common to encounter them operating in the field today.

First, we will introduce the L43 and L45 controllers in the following section.

Bulletin 1768 – L43 and L45

The CompactLogix L43 and L45 controllers were first introduced in 2001 and have subsequently been replaced by the 5370 and 5380 CompactLogix controllers. The L43 and L45 platforms featured the following:

• A compact flash memory card
• An Ethernet port
• A serial RS-232 port
• 1769/1768 modules (can only be placed to the right of the power supply)
• A power supply module

The following illustration depicts the L43 and L45 CompactLogix series controller with power supply and I/O modules:

As of July 2020, the Bulletin 1768-L43 and 1768-L45 CompactLogix controllers have been discontinued and are no longer available for sale. Rockwell Automation recommends migrating to the newer CompactLogix 5370 or CompactLogix 5380 control platform.

In the next section, we will detail the L23x controller, which is also no longer being produced by Rockwell Automation.

Bulletin 1769 – L23x

The L23x CompactLogix controller is a highly compact controller featuring embedded I/O. The L23x controller has been discontinued and replaced by the 5370 and 5380 CompactLogix controllers.

The L23x platform featured the following:

• A serial RS-232 port
• An Ethernet port (only on E models)
• Embedded I/O
• An embedded power supply module

The following illustration shows the L23E featuring an embedded network card and its embedded I/O points:

L23x CompactLogix controllers have been discontinued and are no longer available for sale. Rockwell Automation recommends migrating to the newer CompactLogix 5370 or CompactLogix 5380 control platform.

In the next section, we will discuss the CompactLogix L3x modular controllers.

Bulletin 1769 – L3x modular controllers

The L3x CompactLogix controller is a modular controller platform featuring replaceable I/O cards similar to the ControlLogix platform. The L3x controller has been discontinued and replaced by the 5370 and 5380 CompactLogix controllers.

The L3x platform featured the following:

• A CompactFlash memory card
• A serial RS232, or ControlNet, or Ethernet port
• 1769 modules that can be placed to the left or right of the power supply module
• A power supply module

The following illustration depicts the L3x controller, its power supply, and I/O modules:

L3x CompactLogix controllers have been discontinued and are no longer available for sale. Rockwell Automation recommends migrating to the newer CompactLogix 5370 or CompactLogix 5380 control platform.

In the following section, we will introduce the modern line of embedded I/O CompactLogix controllers, the 5370 controllers.