Product Overview
From the CompactLogix 5370 product line, the Allen-Bradley 1769-L33ER programmable automation controller delivers a modular and cost-effective solution for medium-sized automation tasks. As a processor module, it supports up to 32 I/O modules across 3 banks, providing scalable control for manufacturing lines, packaging systems, and material handling. This controller is designed for engineers who need reliable performance without the complexity of larger platforms.
Technical Specifications Breakdown
Key parameters for the 1769-L33ER are listed below for quick reference:
| Feature | Specification |
|---|---|
| Part Number | 1769-L33ER |
| Brand | Allen-Bradley |
| Product Family | CompactLogix |
| Product Line | CompactLogix 5370 |
| Product Type | Programmable Automation Controller |
| Module Type | Processor Module |
| Communication | Ethernet |
| Communication Ports | 1 USB; 1 Ethernet |
| Supported Protocols | EtherNet I/P |
| Memory | 2MB |
| Maximum I/O Modules Supported | 32 Modules |
| Maximum I/O Banks Supported | 3 banks |
| Number of Tasks | 32 |
| Programs per Task | 100 |
| Operating Temperature | 0° to +60°C (+32° to +140°F) |
| Vibration (Operating) | 10 to 500 Hz, 5G, 0.030 in. peak-to-peak |
| Mounting | DIN Rail; Panel Mounting |
| Shipping Weight | 2 pounds |
| Shipping Dimensions | 8 x 8 x 5 inches |
Industry Applications
This controller excels in discrete manufacturing and process control where reliable Ethernet/IP communication is essential. Common applications include conveyor systems, packaging lines, and batch processing. With 2MB memory and support for 32 tasks, the 1769-L33ER handles complex logic sequences typical in automotive assembly and food processing. The dual Ethernet port (embedded switch) simplifies network topology, reducing cabling costs in distributed control architectures.
Installation and Setup Guidance
Mount the controller on a DIN rail or panel, ensuring the enclosure maintains the operating temperature range of 0° to +60°C. Use copper wire rated for 90°C with solid sizes 22 to 14 AWG or stranded 22 to 16 AWG. The controller draws 560 mA at 5V DC from the backplane; select a compatible power supply such as 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4. For shock resistance, panel mounting provides 30g tolerance versus 20g for DIN rail. Connect Ethernet using standard Cat5/Cat6 cables up to 100 meters.
Maintenance and Reliability
Periodically inspect the enclosure for dust and verify ambient temperature stays within 0° to +60°C. The 1769-L33ER uses internal energy storage for memory retention, eliminating battery replacement. For non-volatile storage, the included 1784-SD1 card (1GB) can be upgraded to the 1784-SD2 (2GB). Check vibration levels remain below 5G at 10-500 Hz to avoid connection issues.
Compatibility and Integration
The controller communicates via EtherNet/IP, supporting up to 32 Ethernet nodes. It integrates with HMIs, SCADA, and DCS systems. For DeviceNet networks, add a 1769-SDN scanner module. The USB port aids initial configuration and troubleshooting. Electronic keying prevents incompatible module installation, with options for Compatible Module, Disable Keying, or Exact Match.
Troubleshooting and Common Issues
If the controller faults, verify electronic keying settings match the installed hardware. Check Ethernet cable integrity and ensure the power supply distance rating of four slots is respected. For memory issues, confirm the 1784-SD1 card is properly seated. Overheating may occur if enclosure temperature exceeds 60°C; install cooling if needed.
Selection Guide and Purchasing Advice
When selecting the 1769-L33ER, confirm your application requires up to 32 I/O modules and 3 banks. The controller supports Series A and B revisions. For availability and lifecycle status, contact SpareTechPLC before ordering. We stock genuine Allen-Bradley parts to ensure system reliability.
Please verify current lifecycle status and availability with SpareTechPLC before ordering.
