1768-L45 CompactLogix Processor Module Allen-Bradley 3MB

Product Overview

The Allen-Bradley 1768-L45 is a CompactLogix processor module. It belongs to the 1768 CompactLogix family. Rockwell Automation designed it for medium-sized automation systems. The controller runs on the Logix platform. It has 3MB integrated memory. One fully isolated RS232 port is built in. The module supports up to 30 Compact I/O modules across 3 I/O banks. It also accepts up to 4 x 1768 modules. Two communication modules can be added for Ethernet and other protocols. This makes the 1768-L45 a flexible choice for control, motion, I/O and network tasks. The unit suits plants that need reliable serial communication and moderate I/O expansion. Oiltech Controls supplies tested units with clear technical verification before shipment.

Technical Specifications

Installation Guide

• Use M4 or #8 screws for mounting.
• Keep the enclosure open only during service.
• Respect the 4-module power supply distance rating.
• Connect the serial cable to the RS232 port.
• Use 1747-CP3 or 1756-CP3 for programming.
• Plan 3 I/O banks for up to 30 x 1769 modules.
• Allow space for up to 4 x 1768 modules.
• Fit communication modules only in supported slots.
• Check backplane current before adding modules.
• Keep ambient temperature within 0°C to +60°C.

Commissioning and Maintenance

• Verify firmware and project compatibility before power-up.
• Use the isolated serial port for DF1 or DH485 setup.
• Confirm module counts in the Logix project.
• Check 2.0 A at 24V backplane current margin.
• Monitor power dissipation during cabinet thermal checks.
• Use CompactFlash 1784-CF128 for optional non-volatile memory.
• Inspect connectors and terminal torque during routine service.
• Replace only with compatible CompactLogix parts.

Compatibility Notes

• Works with 1769 Compact I/O modules.
• Supports up to 30 x 1769 I/O modules in 3 banks.
• Accepts up to 4 x 1768 modules.
• Supports 1768-ENBT and 1768-EWEB for Ethernet.
• Uses 1747-CP3 or 1756-CP3 programming cables.
• Fits Logix-based control architectures for medium applications.
• Use only approved CompactLogix power and I/O arrangements.
• Check backplane current for mixed 1768 and 1769 layouts.

Certification Information

• cUL-us tested and certified for US and Canada.
• Emission standard: CISPR 11 Group 1, Class A.
• Certified at temperature code T4 (135°C).
• Isolation type tested at 500V AC for 60 seconds.
• Designed for industrial environments.
• Meets standard requirements for industrial automation use.

What Is in the Box

• 1 x Allen-Bradley 1768-L45 CompactLogix controller.
• Protective packaging for safe transport.
• Technical order documentation as required.
• Shipping weight is about 2 pounds (0.34 kg).
• Shipping dimensions are about 8 x 8 x 5 inches.
• No extra accessories are included unless stated in the order.

Warranty and Shipping

Every unit includes a 12-month warranty. We ship by FedEx, UPS and DHL. Global shipment support is available. Technical verification is completed before shipment. Please confirm the exact revision and accessories before ordering.

Typical Applications

• Medium-sized factory automation lines.
• Packaging and material handling cells.
• Motion and I/O control panels.
• Serial device integration using DF1 or DH485.
• Legacy CompactLogix upgrades.
• Process skids with moderate I/O counts.
• Systems that need Ethernet through 1768 modules.

Diagnostic Capability

• Serial port supports DF1 Full Duplex and DF1 Half Duplex.
• Serial port supports DH485 communication.
• Controller status can be checked through the Logix environment.
• Isolated RS232 helps reduce communication noise issues.
• Module count checks help catch configuration errors.
• Backplane current limits help prevent overload mistakes.
• Supports system-level diagnostics in integrated control architectures.

Why Buy From Oiltech Controls?

• 15+ years of industrial automation spare parts experience.
• Global shipment support through FedEx, UPS and DHL.
• Tested industrial surplus and refurbished options are available.
• 12-month warranty on supplied units.
• Technical verification before shipment.
• Support for obsolete control systems.
• Clear part number checks before order dispatch.

FAQ

Q: Is the 1768-L45 a controller or an I/O module?
A: It is a CompactLogix processor module and controller.

Q: How much memory does it have?
A: It has 3MB integrated memory.

Q: How many I/O modules can it support?
A: Up to 30 x 1769 Compact I/O modules in 3 banks.

Q: Can I add Ethernet?
A: Yes. It supports 1768-ENBT and 1768-EWEB modules.

Q: What programming cable should I use?
A: Use 1747-CP3 or 1756-CP3.

Q: What is the operating temperature range?
A: The range is 0°C to +60°C (+32°F to +140°F).

Q: Does it come with a warranty?
A: Yes. It includes a 12-month warranty.

Q: How do you ship?
A: We ship by FedEx, UPS and DHL.