
Allen-Bradley 1768-L45 CompactLogix Controller: Powerful Processor for Mid-Range
Product Summary
The 1768-L45 is a Rockwell Automation CompactLogix processor. This controller provides a powerful Logix platform for medium-sized applications. It integrates a large 3MB memory for complex programs. You get one fully isolated RS232 communication port. This module offers a cost-effective control solution for demanding industrial environments.
Product Procurement & Buyer Guide
Mid-Range Automation Powerhouse
The 1768-L45 delivers the power needed for mid-size automation tasks. It handles motion, I/O, and network demands efficiently. This controller supports up to four local 1768 expansion modules. It also accommodates thirty 1769 Compact I/O modules across three banks. This configuration provides excellent system scalability for growing operations.
Core Communication and Expansion Capabilities
This processor includes one isolated RS232 serial port. It supports DF1 full and half duplex protocols. The port also handles DH485 communication at speeds up to 38.4 Kbps. For Ethernet connectivity, you can install up to two modules like the 1768-ENBT. This flexibility makes integration into existing networks simple.

Critical Specifications for Procurement
The 1768-L45 consumes a maximum power of 48.0 Watts and dissipates only 8.3 Watts. It requires a backplane current of 2.0 Amps at 24 Volts. The operating temperature range is 0 to 60 degrees Celsius. Its robust design handles 5G vibration from 10 to 500 Hz. This unit also has a T4 temperature code rating of 135 degrees Celsius.
Integration with Motion Control
You can pair this controller with the 1768-M04SE SERCOS interface module. This combination enables precise synchronized motion control. The 1768-L45 supports up to two of these motion modules. It allows control of up to eight Kinetix servo drives. This makes it ideal for multi-axis applications in packaging or assembly.
Expert Technical Evaluation
The controller offers a total backplane current draw of 7.6 Amps at 5.2 Volts. This ensures reliable power delivery to all connected modules. It features an isolation voltage of 30 Volts continuous. The unit is cUL-us certified for use in the US and Canada. It also meets CISPR 11 Group 1, Class A emission standards for industrial settings.

Deep-Dive Technical FAQ
Question 1: What programming cable do I need for the 1768-L45?
You should use cable 1747-CP3 or 1756-CP3. This right-angle cable is 3 meters long.
Question 2: Can I add non-volatile memory to this controller?
Yes, you can use the optional CompactFlash card 1784-CF128 for storage.

Question 3: What is the maximum number of modules I can install?
You can install up to 30 I/O modules in three local banks. You also get support for four 1768 series modules.