1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory
1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory
1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory
    1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory
1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory

1769-L31 | Allen-Bradley CompactLogix Dual Serial Port Processor, 512 KB Memory

Part #: 1769-L31 Manufactured by: Allen-Bradley
Regular price
$799.00
Sale price
$799.00
Regular price
4 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
Allen-Bradley 1769-L31 CompactLogix Dual Serial Processor, 512KB capacity of memory CPU Module 1769-L31 Allen Bradley seri...  Read more
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • Visa
warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1769-L31
IQElectro offers a free 2-year warranty on all products. You can trust that every purchase is a reliable investment in the future of your company. Warranty Terms
2-3 Day Free Shipping
Packed Ready to Ship
24/7 Expert Support
Return within 30-Days
IQElectro LLC BBB Business Review
IQElectro is Not an authorized distributor for Allen-Bradley
Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1769-L31

Description / Specifications

Description 

The Allen-Bradley 1769-L31 is a CompactLogix controller that is part of the 1769 CompactLogix Programmable Automation Controller (PAC) family. This controller has Two (2) RS232 communication ports, with 512Kbytes memory and supports installation up to Sixteen (16) I/O modules and extended up to Three (3) banks of I/O module.

 

Technical Specifications 

 

Brand Allen-Bradley
Series A and B
Part Number 1769-L31
Manufacturer Rockwell Automation
Channel Isolation Channel 0: Fully isolated; Channel 1: Non-isolated
Communication ports Two (2) RS232
Product Type Controller
Product Line CompactLogix
Module Type Processor Module
Communication Serial
Enclosure Type Rating None (Open Style)
Memory 512 kilobytes
Battery 1769-BA
Shipping Dimensions 8X8X5 inch
Wire Type Copper-90 degrees Celsius
Wire Size (Solid) 22-14 AWG

  

 

Information About 1769-L31

The Allen-Bradley 1769-L31 is a Programmable Automation Controller (PAC) that is part of the 1769 CompactLogix controller family. This controller is ideal for use in small to medium scale applications. This controller is provided with dual RS232 communication interfaces, specifically channel 0 that supports DF1, DH-485 and ASCII protocols and channel 1 that supports DF1 and DH-485 protocols.

Channel 0 is a fully isolated port while Channel 1 is a non-isolated port, both supporting up to 38.4 kbps transmission speed. It also comes with a user memory of 512Kbytes and non-volatile memory option through the 1784-CF64 or 1784-CF128 CompactFlash card.

This controller supports up to Sixteen (16) local I/O modules and may be expanded up to Three (3) banks of Input and Output modules for system expansion. This controller must be installed not more than Four (4) modules away from the power supply, designated by its power supply distance rating.

It is also equipped with commissioning such as I/O forcing for rapid engineering of the controller.

The 1769-L31 comes with easily identifiable LED indicators such as RUN, FORCE, BAT, OK, I/O, DHC0, Channel 0 and Channel 1 LED indicators. Each of these LED operate independently to depict the current controller status.

This controller comes with a 1747-BA battery that is used to maintain contents of user memory where the program is downloaded. This battery is a replaceable unit and provided with a Battery (BAT) status LED. Only one controller can be used in a CompactLogix system.

The 1769-L31 controller has 512 KB of available user memory. It has Two (2) RS-232 serial ports for communication with one for the system or user protocols and one for system protocol only. It can support a maximum of 4 tasks, 16 local I/O modules, and 3 I/O banks. It has a current requirement of 330mA at 5V DC and 40mA at 24V DC. It has a dimension of 8 x 8 x 5 in. and weighs 2 lbs. For installation, it uses the DIN-rail or panel mounting method with an open enclosure. It must always be the leftmost module and be within four modules of the system’s power supply. For wiring, the 1756-CP3 or the 1747-CP3 serial cable with a 2mm^2 (14- 22 AWG) category standard is used. The 1784-CF128 Industrial CompactFlash card can also be installed as a nonvolatile memory. The 1769-BA is the only battery module compatible with this controller.

The 1769-L31 controller has LED status indicators for various commands such as Run, Force, Battery, I/O, and Ok. It is intended for use in overvoltage category II industrial standards with 0 - 60 °C operating temperature and 30g operating shock.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1769-L31
Question: Which communication ports are available on the 1769-L31?
Date Update:09/06/2025
Answer:

The 1769-L31 controller has:

  • Two RS232 communication ports.
  • Channel 0 (fully isolated) supports DF1, DH-485, and ASCII protocols.
  • Channel 1 (non-isolated) supports DF1 and DH-485.
  • Both ports operate at speeds up to 38.4 kbps.

These ports enable connection to various serial devices and networks.

Question: How much user memory does the 1769-L31 controller have?
Date Update:09/06/2025
Answer:

The 1769-L31 controller is equipped with 512 KB of user memory. This memory is used for storing programs, data tables, and configuration information necessary for the controller to operate within an automation system. This memory ensures reliable and consistent control of processes.

Question: Can the 1769-L31 controller’s memory be expanded?
Date Update:09/06/2025
Answer:

Yes, the 1769-L31 can use optional non-volatile memory modules, such as the 1784-CF64 or 1784-CF128 CompactFlash cards. These modules store user programs and configuration data, ensuring the controller can recover quickly after a power cycle. However, the built-in RAM remains at 512 KB.

Question: How can I get the 1769-L31 controller to show up in my Studio 5000 software so I can create a new project?
Date Update:09/06/2025
Answer:

The Allen-Bradley 1769-L31 controller requires a specific version of Studio 5000 (or Logix5000) software to be supported and appear in your project options. The 1769-L31 controller is compatible with versions 13 through 20 of Studio 5000 (or Logix5000). If you have only versions 24 and 30 installed, you won’t see the L31 in the list.
To fix this, download and install an earlier version (for example, version 20) by going to Rockwell Automation’s website, selecting “Downloads by Serial Number,” and entering your product key and serial number. If you do not have a TechConnect support contract, you’ll need to contact your local distributor to get assistance downloading or accessing earlier versions.
Keep in mind that before version 20, the software was called RSLogix 5000. Starting with version 21, it was renamed Studio 5000. Make sure you’re using the correct version that supports the 1769-L31 controller.

Question: Is the 1769-L31 controller still in production?
Date Update:09/06/2025
Answer:

Yes, the Allen-Bradley 1769-L31 CompactLogix controller is still in production and widely available. It is recommended to check Rockwell Automation’s website or with an authorized distributor to confirm its current lifecycle status and compatibility with your automation system.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1769-L31 is a CompactLogix controller that is part of the 1769 CompactLogix Programmable Automation Controller (PAC) family. This controller has Two (2) RS232 communication ports, with 512Kbytes memory and supports installation up to Sixteen (16) I/O modules and extended up to Three (3) banks of I/O module.

 

Technical Specifications 

 

Brand Allen-Bradley
Series A and B
Part Number 1769-L31
Manufacturer Rockwell Automation
Channel Isolation Channel 0: Fully isolated; Channel 1: Non-isolated
Communication ports Two (2) RS232
Product Type Controller
Product Line CompactLogix
Module Type Processor Module
Communication Serial
Enclosure Type Rating None (Open Style)
Memory 512 kilobytes
Battery 1769-BA
Shipping Dimensions 8X8X5 inch
Wire Type Copper-90 degrees Celsius
Wire Size (Solid) 22-14 AWG

  

 

Information About 1769-L31

The Allen-Bradley 1769-L31 is a Programmable Automation Controller (PAC) that is part of the 1769 CompactLogix controller family. This controller is ideal for use in small to medium scale applications. This controller is provided with dual RS232 communication interfaces, specifically channel 0 that supports DF1, DH-485 and ASCII protocols and channel 1 that supports DF1 and DH-485 protocols.

Channel 0 is a fully isolated port while Channel 1 is a non-isolated port, both supporting up to 38.4 kbps transmission speed. It also comes with a user memory of 512Kbytes and non-volatile memory option through the 1784-CF64 or 1784-CF128 CompactFlash card.

This controller supports up to Sixteen (16) local I/O modules and may be expanded up to Three (3) banks of Input and Output modules for system expansion. This controller must be installed not more than Four (4) modules away from the power supply, designated by its power supply distance rating.

It is also equipped with commissioning such as I/O forcing for rapid engineering of the controller.

The 1769-L31 comes with easily identifiable LED indicators such as RUN, FORCE, BAT, OK, I/O, DHC0, Channel 0 and Channel 1 LED indicators. Each of these LED operate independently to depict the current controller status.

This controller comes with a 1747-BA battery that is used to maintain contents of user memory where the program is downloaded. This battery is a replaceable unit and provided with a Battery (BAT) status LED. Only one controller can be used in a CompactLogix system.

The 1769-L31 controller has 512 KB of available user memory. It has Two (2) RS-232 serial ports for communication with one for the system or user protocols and one for system protocol only. It can support a maximum of 4 tasks, 16 local I/O modules, and 3 I/O banks. It has a current requirement of 330mA at 5V DC and 40mA at 24V DC. It has a dimension of 8 x 8 x 5 in. and weighs 2 lbs. For installation, it uses the DIN-rail or panel mounting method with an open enclosure. It must always be the leftmost module and be within four modules of the system’s power supply. For wiring, the 1756-CP3 or the 1747-CP3 serial cable with a 2mm^2 (14- 22 AWG) category standard is used. The 1784-CF128 Industrial CompactFlash card can also be installed as a nonvolatile memory. The 1769-BA is the only battery module compatible with this controller.

The 1769-L31 controller has LED status indicators for various commands such as Run, Force, Battery, I/O, and Ok. It is intended for use in overvoltage category II industrial standards with 0 - 60 °C operating temperature and 30g operating shock.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Check Out These Related Products