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- Allen Bradley
- 1769-L31
- CompactLogix I/O Module
- USA
- 118 mm × 70 mm × 87 mm
- 0.41kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Allen Bradley 1769-L31 CompactLogix Controller Detailed Overview
Product Introduction
The Allen Bradley 1769-L31 is a CompactLogix 5370 series programmable automation controller designed for small to medium industrial automation systems. It provides a balance between processing capability, communication flexibility, and modular expansion, making it suitable for machine-level control applications.
This controller is widely used in packaging equipment, conveyor systems, material handling machines, OEM equipment, and general industrial automation systems.
The 1769-L31 belongs to an earlier generation CompactLogix platform but is still recognized for its stable performance, simple architecture, and reliable control capability.
It is designed with a modular structure that supports 1769 Compact I/O expansion modules, allowing flexible system configuration depending on application requirements.
The controller is now considered a legacy model, but it remains in use in many installed industrial systems due to its reliability and long service life.
Brand Information
| Item | Description |
|---|---|
| Brand | Industrial Automation Controller Manufacturer |
| Product Type | Programmable Logic Controller (PLC / PAC) |
| Product Category | Compact Industrial Controller |
| Main Function | Machine Control & Automation |
| Communication Protocol | RS-232 / Ethernet via expansion |
| Application Fields | Manufacturing, Packaging, Logistics |
| Mounting Type | DIN Rail Mount |
Product Series Information
| Item | Description |
|---|---|
| Product Series | CompactLogix 1769 Series |
| Controller Family | CompactLogix |
| Architecture Type | Modular PLC Platform |
| Expansion System | 1769 Compact I/O Modules |
| Communication Architecture | Serial-based + modular communication |
| Programming Software | RSLogix 5000 / Studio 5000 |
| Motion Capability | Limited / basic control |
| Product Lifecycle | Discontinued (legacy system) |
Detailed Technical Specifications
| Parameter | Details |
|---|---|
| Model | 1769-L31 |
| Controller Type | CompactLogix Programmable Automation Controller |
| User Memory | 512 KB |
| Nonvolatile Memory | CompactFlash support (1784-CF128) |
| Digital I/O | Via 1769 expansion modules |
| Analog I/O | Via 1769 expansion modules |
| Communication Ports | 2 × RS-232 serial ports |
| Ethernet Port | Not built-in (requires module/gateway) |
| Serial Protocols | DF1, DH-485, ASCII |
| Maximum I/O Modules | Up to 16 local modules |
| I/O Banks | Up to 3 banks |
| Programming Languages | Ladder Logic, Function Block, Structured Text |
| Operating Voltage | 24V DC system power |
| Power Consumption | Approx. 5–7 W typical |
| Battery Backup | 1747-BA battery supported |
| Mounting Type | DIN rail / panel mount |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Dimensions | 118 mm × 70 mm × 87 mm |
| Weight kg | Approx. 0.41 kg |
| Communication Protocol | Serial RS-232 |
| Firmware Upgrade | Supported (legacy tools) |
| Certifications | UL, CE, CSA |
Product Features
1. Dual Serial Communication Architecture
The controller includes two RS-232 communication channels, allowing integration with legacy industrial devices, HMIs, and serial communication networks.
It supports DF1, DH-485, and ASCII protocols, making it suitable for older industrial systems.
2. Modular I/O Expansion Capability
The 1769-L31 supports up to 16 Compact I/O modules, allowing flexible system configuration.
It can also be expanded into multiple I/O banks depending on system design requirements.
3. Stable Industrial Control Performance
Although an older generation controller, it provides stable scan time and reliable execution for small to medium automation tasks.
It is widely used in long-life industrial installations where replacement is not frequent.
4. Compact and Simple Architecture
The controller design is simple and compact, reducing installation complexity.
It is suitable for OEM machines where control logic is stable and not frequently modified.
5. Reliable Memory and Battery Backup
The system includes battery-supported memory retention to ensure program stability during power loss.
This is important for continuous production systems.
Product Applications
Packaging Machines
Used in basic packaging systems such as sealing machines, labeling machines, and small filling systems.
Conveyor Systems
Applied in simple conveyor control, material transfer lines, and small logistics automation systems.
OEM Equipment
Widely used in machine builder equipment requiring stable and low-complexity control systems.
Manufacturing Equipment
Used in small production machines, assembly equipment, and auxiliary industrial systems.
Legacy Industrial Systems
Common in older installed systems that still operate in factories and require maintenance support.
Product Advantages
| Advantage | Description |
|---|---|
| Stable Operation | Proven long-term industrial reliability |
| Simple Architecture | Easy to configure and maintain |
| Dual Serial Ports | Supports legacy communication systems |
| Modular Expansion | Supports up to 16 I/O modules |
| Compact Design | Saves control cabinet space |
| Low Power Consumption | Efficient energy usage |
| Flexible Communication | Supports multiple serial protocols |
| Easy Maintenance | Simple diagnostics and structure |
| Long Lifecycle Usage | Widely used in legacy systems |
| Cost Effective | Suitable for basic automation |
| Reliable Memory Backup | Battery-supported program retention |
| Industrial Durability | Designed for harsh environments |
Recommended Models from Same Series or Related Controllers
| Parameter | 1769-L31 | 1769-L32E | 1769-L30ER | 1769-L24ER-QB1B | 1769-L27ERM-QBFC1B |
|---|---|---|---|---|---|
| Series | CompactLogix 1769 | CompactLogix 1769 | CompactLogix 5370 L3 | CompactLogix 5370 L2 | CompactLogix 5370 L2 |
| User Memory | 512 KB | 750 KB | 1 MB | 0.75 MB | 1 MB |
| Ethernet | No | Yes | Yes | Yes | Yes |
| Serial Ports | 2 | 1 | No | No | No |
| Integrated I/O | No | No | No | Yes | Yes |
| Motion Capability | Basic | Basic | Basic | 4 axes | 4 axes |
| Max Expansion Modules | 16 | 16 | 16 | 16 | 16 |
| Dimensions | 118×70×87 mm | 118×70×87 mm | 118×55×105 mm | 140×110×87 mm | 140×100×89 mm |
| Weight kg | 0.41 kg | 0.45 kg | 0.65 kg | 0.72 kg | 0.79 kg |
| Application | Legacy Control | Upgraded Legacy | General Control | Machine Control | Motion Systems |
Related Model Notes
1769-L32E
An upgraded version of the L31 with Ethernet/IP communication support and improved integration capability.
1769-L30ER
Modern CompactLogix controller with dual Ethernet and modular expansion for industrial automation systems.
1769-L24ER-QB1B
Compact machine controller with integrated I/O for small to medium automation applications.
1769-L27ERM-QBFC1B
Motion-capable controller with integrated analog and digital I/O for synchronized automation systems.
Popular Models from Same Platform
| Parameter | 1756-L81E | 5069-L310ER | 1734-AENTR | 1769-IF8 | 2080-LC50-48QWB |
|---|---|---|---|---|---|
| Type | ControlLogix CPU | CompactLogix CPU | I/O Adapter | Analog Module | Micro PLC |
| Memory | 3 MB | 2 MB | N/A | N/A | Embedded |
| Communication | Ethernet/IP | Ethernet/IP | Ethernet/IP | Backplane | Ethernet |
| Motion | Advanced | Integrated | None | None | Basic |
| Mounting | Chassis | DIN Rail | DIN Rail | DIN Rail | DIN Rail |
| Dimensions | 145×145×90 | 150×130×90 | 75×35×118 | 118×87×35 | 90×130×80 |
| Weight kg | 1.10 kg | 1.20 kg | 0.15 kg | 0.32 kg | 0.70 kg |
| Main Use | Large Systems | Modern Automation | Distributed I/O | Signal Processing | Small Machines |
Summary
The 1769-L31 is a legacy CompactLogix controller designed for basic to medium industrial automation tasks with serial communication architecture.
Its key value lies in simplicity, reliability, and long-term industrial stability, making it suitable for existing installed systems and basic machine control applications where Ethernet-based upgrades are not required.