Product Overview
The Allen-Bradley 1769-L32E is a CompactLogix controller from the 5370 family, designed for machine control and medium-sized process applications. This Programmable Automation Controller (PAC) integrates 750 KB memory, one EtherNet/IP port, and one RS-232 serial port, making it a versatile choice for modern industrial systems.
With support for up to 16 Compact I/O modules and 3 expansion banks, the 1769-L32E scales easily with your application. Its compact form factor and flexible mounting options (DIN rail or panel) simplify installation in tight control cabinets.
Technical Specifications
The following table outlines the key parameters of the Allen-Bradley 1769-L32E:
| Specification |
Value |
| Part Number |
1769-L32E |
| Product Line |
CompactLogix |
| Product Type |
Programmable Automation Controller |
| Module Type |
Processor Module |
| Communication Ports |
1 RS232; 1 Ethernet |
| Supported Protocols |
DH485; DF1; ASCII; EtherNet |
| Memory |
750 KB |
| Max I/O Modules |
16 Modules |
| Max I/O Banks |
3 Banks |
| Operating Temperature |
0° to +60°C (+32° to +140°F) |
| Wire Size (Solid) |
22 to 14 AWG |
| Wire Size (Stranded) |
22 to 16 AWG |
| Mounting |
DIN Rail; Panel Mounting |
| Shipping Weight |
2 pounds |
| Shipping Dimensions |
8 x 8 x 5 inches |
Industry Applications
The 1769-L32E excels in discrete and process control applications. Typical uses include packaging machinery, material handling systems, and batch processing lines. Its EtherNet/IP port enables seamless integration with plant-wide networks, while the RS-232 port supports serial devices like barcode scanners.
For example, in a bottling plant, the 1769-L32E coordinates fill-level sensors, conveyor drives, and labeling units, ensuring precise timing and minimal downtime. Its 750 KB memory accommodates complex logic routines, and the ability to add up to 16 local I/O modules allows for system expansion without redesign.
Installation & Setup
Mount the 1769-L32E on a DIN rail or panel using the provided slots. Ensure proper spacing for heat dissipation. Connect the RS-232 port to a programming terminal using a 1747-CP3 or 1756-CP3 cable. For initial Ethernet configuration, use BOOTP-DHCP or download settings via the serial port.
Wire field devices to the I/O modules using copper wire rated for 90°C. Solid wire should be 22 to 14 AWG, and stranded wire 22 to 16 AWG. Tighten terminal screws to the recommended torque of 1.1 to 1.8 N-m to ensure reliable connections.
Maintenance & Reliability
Regularly inspect the controller for dust accumulation and ensure the operating temperature stays within 0° to +60°C. The 1769-L32E uses a replaceable battery (1769-BA) to retain user memory; replace it every few years to prevent program loss. Monitor the status indicators for network activity and module health.
Periodically back up the program to a CompactFlash card (1784-CF128) to safeguard against unexpected failures. Following these practices extends the service life and reduces unplanned downtime.
Compatibility & Integration
The 1769-L32E supports DH485, DF1, ASCII, and EtherNet protocols, allowing connection to Rockwell Automation and third-party devices. It is compatible with RSLogix 5000 software (version 16.00) and can be programmed using relay ladder, structured text, function block, or SFC.
As part of the CompactLogix family, it serves as a migration path for legacy PLC-5 and SLC 500 systems, providing enhanced performance while maintaining existing I/O wiring.
Buying Guide
Before purchasing the 1769-L32E, verify your required I/O count and communication needs. Ensure you have the necessary programming cable and software. Consider adding a 1784-CF128 CompactFlash card for non-volatile memory storage.
PLC Source PRO offers genuine Allen-Bradley 1769-L32E controllers with fast shipping and competitive pricing. Our technical team can assist with compatibility questions.