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Product Introduction
The Allen Bradley 1769-L31 CompactLogix Dual Serial Port Controller is a compact programmable automation controller designed for industrial applications requiring dual serial communication and reliable control. Part of the CompactLogix family, this controller provides an efficient solution for machines and systems that need both processing power and serial connectivity without Ethernet integration.
Equipped with two RS‑232 serial ports, the controller enables communication with various industrial devices such as operator interfaces, barcode scanners, and serial drives. One port is channel-isolated (Ch0) for safety and signal integrity, while the second port (Ch1) is non-isolated. The integrated controller can manage up to 16 local I/O modules across 3 I/O banks, allowing flexible system expansion.
With 512 KB user memory, the 1769-L31 can store control programs, configuration settings, and communication data. Its compact size and open-style enclosure make it suitable for small control cabinets and OEM machinery where space is limited.
Product Specifications
| Parameter | Specification |
|---|---|
| Product Model | 1769-L31 |
| Product Type | CompactLogix Dual Serial Port Controller |
| User Memory | 512 KB |
| Communication Ports | 2 × RS‑232 |
| Channel Isolation | Ch0 isolated, Ch1 non‑isolated |
| Max Local I/O Modules | 16 |
| Max I/O Banks | 3 |
| Enclosure Type | Open style |
| Wiring | Copper, 22–14 AWG, 90 °C |
| Mounting Method | DIN Rail / Panel Mount |
| Dimensions | 132 x 67.5 mm |
| Weight | 0.3 kg |
Applications
• Compact machine automation
Suitable for small machines requiring dual serial communication for device monitoring and control.
• Industrial equipment control
Used to manage sensors, switches, and actuators in conveyors, packaging, or assembly devices.
• Serial communication with devices
The dual RS‑232 ports support barcode readers, operator panels, and serial drives for system integration.
• OEM machinery
Ideal for OEM equipment where compact size and dual serial connectivity are essential.
• Distributed I/O systems
Supports local I/O modules and multiple I/O banks for small-scale distributed control applications.
Advantages
• Dual serial communication
Two RS‑232 ports allow simultaneous connection to multiple serial devices, with channel isolation for safety.
• Expandable I/O capacity
Supports up to 16 local I/O modules across 3 I/O banks for flexible system configuration.
• Compact design
Small footprint allows installation in limited spaces and compact control cabinets.
• Reliable industrial performance
Designed for stable operation in industrial environments, with robust wiring compatibility.
• Flexible control solution
Ideal for small automation systems requiring programmable control and serial connectivity.
