Overview
The Allen-Bradley 1768-L43 is a CompactLogix L43 processor from Rockwell Automation’s CompactLogix family, delivering the Logix platform’s capabilities in a compact, machine-level control package. This controller provides Logix platform capability intended for medium sized applications. The 1768-L43 is ideal for use in small to medium size range of application, compatible for process or factory automation requirements and machines developed by Original Equipment Manufacturers (OEMs).
Key Features
- Integral 2MB memory and one RS232 fully isolated communication port
- Two slots for connecting communication modules and accommodates up to 16 local and remote I/O modules
- Supports coordinated motion control for up to 4 axes when using 1768 motion modules
- Capability to support a maximum of 250 connections
- Programmed using RSLogix 5000 or Studio 5000 Logix Designer
- Online edits are supported without stopping the controller
Technical Specifications
- Supply voltage: 24V with backplane current requirement of 1.3 amps
- Power dissipation: 6.3 watts; overall consumption: 31.3 watts
- Continuous isolation voltage: 30 volts
- Configuration supporting 2 I/O banks
- Communication: RS232 (DF1 or ASCII) with optional EtherNet/IP via modules
Typical Applications
Combined with Compact I/O modules, the CompactLogix platform is perfect for smaller, machine-level control applications with simple motion and is ideal for systems that require standalone and system-connected control over EtherNet/IP, ControlNet, or DeviceNet networks. Common uses include packaging equipment, printing systems, assembly lines, and distributed OEM machine control.
Compatibility & Replacements
Compatible With
- Compact I/O modules (1769 series)
- 1768-series communication modules
- CompactLogix expansion chassis
- EtherNet/IP networks (via communication modules)
- ControlNet and DeviceNet networks (via modules)
Replaces / Drop-In Replacement For
The 1768-L43 directly replaces earlier CompactLogix L43 revisions. The CompactLogix L43 2MB Memory Controller was discontinued as of June 30, 2020 and no longer available for sale; customers are encouraged to consider engineering replacements. For new applications, Rockwell recommends evaluating the CompactLogix 5370 series as a forward-compatible alternative with enhanced capabilities.
Works With
- RSLogix 5000
- Studio 5000 Logix Designer
- Logix5000 ecosystem
- EtherNet/IP protocol
- Modbus RTU and Modbus TCP (via software routines)
- CompactFlash memory cards for program backup
