Overview
The Allen-Bradley 1768-L45 is a CompactLogix processor designed for mid-to-large automation systems requiring reliable logic execution, motion control, and flexible I/O expansion. This controller provides 3 MB of user memory for control logic, motion, and data handling, and supports up to four 1768-series modules locally and up to thirty 1769 I/O modules through expansion banks. It features a modular architecture with four local 1768 slots and an integrated RS-232 serial port supporting multiple DF1 and DH-485 protocols.
Key Features
- 1.2 GHz PowerPC 440 processor with 2 MB of user memory (Flash memory) and 128 MB of RAM
- Supports up to 8,000 I/O points in a system
- Accommodates up to four local 1768 I/O modules and can integrate with a total of 30 1769 I/O modules
- Supports EtherNet/IP, ControlNet, and DeviceNet via communication modules, enabling seamless information flow across networks
- Designed for motion control applications such as material handling, packaging, and metal forming with up to 8 axes of motion
- Built-in RS-232 port supports DF1 point-to-point, master, slave, radio modem modes, ASCII communication, and DH-485 networking
Technical Specifications
- User Memory: 3MB
- I/O Memory: 0.8MB
- Processor: 1.2 GHz PowerPC 440
- Power Consumption: 48 Watts total
- Input Voltage: 24 volts DC
- Input Current: 7.6 amperes
- Backplane Current: 2 Amps at 24 Volts with 1769 modules
- Operating Temperature Range: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
- Local I/O Capacity: Up to four 1768 I/O modules locally
- Expansion I/O: Up to thirty 1769 Compact I/O modules in three I/O banks
- Mounting Clearances: 105 mm (4.13 in.) for top and bottom, 90 mm (3.54 in.) for side clearances
- Isolation Voltage: 30 V continuous (tested at 500 V AC for 60 seconds)
Typical Applications
The 1768-L45 is commonly used in industries like manufacturing, packaging, material handling, and more. Its motion-control capabilities and high I/O capacity make it suitable for:
- Integrated motion and synchronization control systems
- Batch and discrete process automation
- Distributed remote I/O installations
- Multi-axis machinery and assembly lines
- Material handling and conveyor systems
Compatibility & Replacements
Compatible With
- 1768 CompactLogix modules (local I/O)
- 1769 Compact I/O modules (remote expansion)
- 1768-ENBT communication module for EtherNet/IP protocol
- 1768-EWEB web server module for Ethernet with remote monitoring capability
- 1768-CNB and 1768-CNBR modules for ControlNet communication (simplex and redundant)
- Serial SERCOS modules (up to four modules with maximum 250 connections)
- 1768-PA3 or 1768-PB3 power supplies
- 1784-CF128 CompactFlash card memory modules
Replaces / Drop-In Replacement For
Compared to the 1768-L43 controller which supports only two local modules and sixteen expansion I/Os, the 1768-L45 provides increased capacity with up to four local I/O and thirty expansion modules, making it ideal for larger automation systems. Verify compatibility with your system integrator before ordering.
Works With
- Studio 5000 Logix Designer programming software
- EtherNet/IP networks
- ControlNet and DeviceNet fieldbus networks
- DF1 point-to-point and master/slave networks
- DH-485 serial networks
- Modbus protocols (via logic)
- SERCOS motion control systems
