8MB ControlLogix CPU 1756-L73K Allen Bradley Coated

Product Overview

The Allen-Bradley 1756-L73K is a conformal-coated ControlLogix 5573 processor with 8 MB user memory. It provides high-performance control with integrated USB communication, 1 GB non-volatile memory support, and full controller redundancy for large-scale industrial applications.

Key Specs

• User memory: 8 MB
• I/O memory: 0.98 MB
• Max I/O: 128,000 digital, 4000 analog
• Communication: 1 USB port, optional EtherNet/IP, ControlNet, DeviceNet
• Non-volatile memory: 1 GB (1784-SD1) included, 2 GB (1784-SD2) optional
• Current draw: 5 mA @ 1.2 V DC, 800 mA @ 5.1 V DC
• Power dissipation: 2.5 W
• Controller redundancy: Full support

Why Choose This

• Conformal coating protects against corrosive environments
• 8 MB memory supports large applications with extensive data handling
• Full controller redundancy capability for high-availability systems
• Energy Storage Module eliminates battery maintenance
• 4-character alphanumeric display for local diagnostics

Common Questions

• What does the K suffix mean? K indicates conformal coating for protection in harsh or corrosive environments.
• How many tasks does it support? 32 tasks with up to 1000 programs per task depending on software version.
• Is redundancy supported? Yes, full controller redundancy with 1756-RM2 or 1756-RM2K modules.

Mounting Steps

1. Install the controller in any slot of a Series B or C 1756 chassis.
2. Insert the 1784-SD1 Secure Digital card into the controller slot.
3. Connect the USB port for programming or install communication modules.
4. Verify the Energy Storage Module is fully seated.
5. Download the application using Studio 5000 Logix Designer.

Buying Advice

• Choose 1756-L73K for large applications in corrosive environments requiring 8 MB memory.
• For standard environments, the 1756-L73 offers identical performance without coating.
• Pair with 1756-RM2K redundancy modules for high-availability architectures.