Allen-Bradley 1762-L24AWAR MicroLogix 1200 PLC

1762-L24AWAR MicroLogix 1200 Programmable Controller

Product Introduction

The 1762-L24AWAR from Allen‑Bradley is a self‑contained programmable logic controller within the MicroLogix 1200 family. This unit combines a power supply, processor, and I/O in a single compact housing. Therefore, it minimises the need for additional components and streamlines panel design.

This controller provides fourteen 120V AC digital inputs and ten relay outputs. These AC inputs connect directly to standard industrial sensors and switches without external interface devices. Meanwhile, the relay outputs are capable of switching both AC and DC loads, making them suitable for driving contactors, solenoids, and indicator lamps. Additionally, the 1762-L24AWAR includes a built‑in serial port that supports DF1 and DH‑485 protocols, enabling communication with HMIs, programming terminals, and other automation equipment.

Furthermore, this controller operates on a wide AC supply range from 120 to 240V AC, accommodating various global power standards. Its robust electrical design includes comprehensive isolation between I/O groups and the backplane, ensuring reliable operation in electrically noisy environments. The controller’s compact dimensions and horizontal mounting orientation make it an excellent choice for control panels with limited space.

Whether you are upgrading an existing machine or designing a new control system, the 1762-L24AWAR delivers dependable performance at an attractive price point. Its balanced feature set makes it a popular option for OEMs and system integrators worldwide.

Technical Specifications

The 1762-L24AWAR offers consistent and reliable performance across its I/O and communication features. Key parameters are detailed below:

Power Supply

• Nominal input voltage: 120/240V AC (operating range 120–240V AC)

• Operating frequency: 47–63 Hz

• User power output: 400 mA at 5V DC; 350 mA at 24V DC

Input Specifications (14 AC Inputs)

• Input type: 120V AC (sink/source)

• On‑state voltage: 79–132V AC

• Off‑state voltage: 0–20V AC

• On‑state current:

  • 5 mA minimum at 79V AC

  • 12 mA nominal at 120V AC

  • 16 mA maximum at 132V AC

• Off‑state leakage: 2.5 mA maximum

• Maximum inrush current: 250 mA at 120V AC

Output Specifications (10 Relay Outputs)

• Contact configuration: Normally open (Form A)

• Contact rating: Refer to standard MicroLogix 1200 relay specifications

• Switching delay: Typical 10 ms

Communication

• Port: 1 x built‑in serial port (Programmer/HMI Port)

• Supported protocols: DF1, DH‑485 (Full‑Duplex)

• Note: This port can respond to messages but cannot initiate them; parameters are fixed

Isolation

• Five independent isolation barriers:

  • Input group to backplane

  • Output group to backplane

  • Input group to input group

  • Output group to output group

  • Power supply to backplane

These specifications ensure that the 1762-L24AWAR can interface reliably with a wide range of field devices. The multiple isolation barriers significantly enhance noise immunity and protect against ground loops.

Mechanical & Environmental Ratings

The controller is built for industrial environments. Its mechanical and environmental characteristics include:

• Dimensions (H x W x D): 90 x 160 x 87 mm (3.54 x 6.30 x 3.43 in.)

• Weight: Approximately 0.9 kg (2.0 lb)

• Mounting: Horizontal DIN‑rail or panel mount

• Operating temperature: 0–55 °C (32–131 °F)

• Storage temperature: –40 to 85 °C (–40 to 185 °F)

• Relative humidity: 5–95% non‑condensing

• Vibration tolerance: 1.5G at 10–500 Hz

• Shock tolerance: 15G

The controller must be mounted horizontally to ensure proper ventilation and heat dissipation. Additionally, install it in a clean, dry environment with circuits not exceeding Over Voltage Category II.

Installation Guidelines

Proper installation of the 1762-L24AWAR ensures optimal performance and longevity. Follow these steps:

1. Mounting: Secure the controller on a 35 mm DIN rail or directly onto a mounting plate. Ensure horizontal orientation and maintain adequate clearance for airflow around the unit.

2. Power Connection: Connect the AC power supply to the designated input terminals. Verify that the voltage and frequency match the controller’s ratings. Install appropriate overcurrent protection (fuse or circuit breaker) as per local electrical codes.

3. Grounding: Connect the ground terminal to the system’s protective earth. A low‑impedance ground path is essential for both safety and noise reduction.

4. Input Wiring: Connect AC field devices to the input terminals. Ensure that the input voltage stays within the specified on‑state range and that the total current does not exceed the module’s capacity.

5. Output Wiring: Connect loads to the relay output terminals. For inductive loads (solenoids, contactors), install external surge suppression devices to protect the relay contacts and extend their service life.

6. Communication: Connect the serial port to an HMI, programming terminal, or other compatible device. Note that this port operates in slave mode and cannot initiate message transmissions.

7. Configuration: Use RSLogix 500 or Connected Components Workbench to program the controller. Configure I/O, communication parameters, and application logic as required.

After installation, power up the system and verify that the 1762-L24AWAR operates correctly. Check the status LEDs for power, run, and fault conditions. Always follow ESD precautions when handling the unit.

Packaging List

When you order the 1762-L24AWAR, the package includes:

• 1762-L24AWAR MicroLogix 1200 controller (1 unit)

• Removable terminal blocks (input and output)

• DIN‑rail mounting clips (pre‑installed)

• Quick‑start installation guide (printed)

Note: Programming cables, software, and communication accessories are sold separately.

Frequently Asked Questions (FAQ)

1. What is the difference between the 1762-L24AWA and the 1762-L24AWAR?
The 1762-L24AWAR is a variant with a different communication port configuration. Specifically, its serial port operates in slave‑only mode and cannot initiate messages, whereas the standard version may offer more flexible communication options. Always check your application requirements before selecting.

2. Can I add expansion I/O modules to this controller?
Yes, the 1762-L24AWAR supports up to 6 expansion modules from the MicroLogix 1200 family. However, ensure that the total current draw does not exceed the controller’s built‑in power supply capacity.

3. What protocols does the built‑in port support?
The port supports DF1 and DH‑485 (Full‑Duplex) protocols. It operates in slave mode, meaning it can respond to requests from a master device but cannot initiate its own message transmissions.

4. Is this controller suitable for high‑vibration environments?
The 1762-L24AWAR is tested to withstand 15G shock and 1.5G vibration at 10–500 Hz. For extreme vibration conditions, we recommend additional mechanical damping or isolation mounting.

5. What shipping carriers do you use?
We ship all orders via FedEx, UPS, or DHL to ensure fast and reliable delivery worldwide. Please contact our sales team for tracking information and estimated delivery times.