Allen-Bradley 1769-L24ER-QB1B CompactLogix 5370 L2 Controller

The Allen-Bradley 1769-L24ER-QB1B is a powerful packaged programmable automation controller. It belongs to the CompactLogix 5370 L2 product family. This controller is ideal for small to medium industrial applications. It integrates I/O, communication ports, and power supply into one unit. You can use it for factory automation or process control systems.

Technical Specifications of the 1769-L24ER-QB1B

The 1769-L24ER-QB1B offers 768 Kbytes of embedded memory. You can expand this memory using a 1784-SD1 or 1784-SD2 card. The controller supports up to 32 tasks. Each task can run up to 100 programs. It uses a 24V DC isolated power supply. The current draw is 1.54 A at 5V DC. It also draws 0.95 A at 24V DC.

Input and Output Details

This controller has sixteen (16) sinking/sourcing 24V DC digital inputs. The input voltage range is 10 to 28.8V DC. The off-state maximum current is 1.5 mA. The on-state current is 2 mA (min) to 5 mA (max) per channel. It also has sixteen (16) sinking 24V DC digital outputs. The output voltage range is 20.4 to 26.4V DC. The maximum voltage drop is 1V DC at 1A. Each output point handles 0.83 A at 40°C. At 60°C, each point handles 0.5 A.

Communication and Memory Features

The 1769-L24ER-QB1B includes two (2) Ethernet/IP ports. These ports support Device Level Ring (DLR) and linear topology. You can connect up to 8 Ethernet nodes. The RS232 port supports ASCII, DH485, and DF1 protocols. The USB port allows initial configuration downloads. The non-volatile memory uses a 1 GB Secure Digital (SD) card. This card ships with the controller. An optional 2 GB SD card is also available.

Installation Guidelines for the 1769-L24ER-QB1B

Mount the 1769-L24ER-QB1B on a standard DIN rail. Use copper wire rated for 90°C. Solid wire size should be 22-14 AWG. Stranded wire size should be 22-16 AWG. Leave at least 50 mm of space around the controller for airflow. Do not place it near high-voltage devices. The controller dimensions are 4.53 x 4.13 x 4.65 inches. Always disconnect power before wiring.

Package Contents

• One (1) Allen-Bradley 1769-L24ER-QB1B CompactLogix controller

• One (1) 1784-SD1 1GB Secure Digital memory card

• One (1) terminal block (Part number 1769-RTBN18)

• Product documentation and quick start guide

Common FAQs for the 1769-L24ER-QB1B

1. What programming languages does the 1769-L24ER-QB1B support?
The 1769-L24ER-QB1B supports Relay Ladder, Structured Text, Function Block, and SFC. The safety task only uses Relay Ladder.

2. Can I add more I/O modules to this controller?
Yes, the 1769-L24ER-QB1B supports up to four (4) additional 1769 Compact I/O modules. This expands your total I/O count easily.

3. Does the 1769-L24ER-QB1B require a battery?
No, this controller uses an internal energy storage circuit. It does not need a lithium battery. The SD card retains your program safely.

4. What is the maximum operating temperature for this unit?
The 1769-L24ER-QB1B operates reliably from 0°C to 60°C. Output current derating applies above 40°C as shown in the specifications.

5. How do I restore a program from the SD card?
Insert the SD card into the 1769-L24ER-QB1B and cycle power. The controller automatically loads the program from the card. This transfers data from non-volatile to volatile memory.

Why Choose the Allen-Bradley 1769-L24ER-QB1B?

This controller saves panel space with its compact design. It offers advanced control features at a low cost. The dual Ethernet ports provide flexible network topologies. You get reliable performance for small to medium machines. Order the 1769-L24ER-QB1B today to improve your automation system.