Allen-Bradley 1762-L24AWA MicroLogix 1200 PLC

1762-L24AWA MicroLogix 1200 Programmable Controller

Product Introduction

The 1762-L24AWA from Allen‑Bradley is a self‑contained MicroLogix 1200 programmable logic controller designed for small to medium‑sized control applications. This compact unit integrates a power supply, processor, and I/O into a single housing. Consequently, it reduces the need for separate components and simplifies system design.

This controller features fourteen 120V AC digital inputs and ten relay outputs, making it suitable for direct connection to AC sensors, pushbuttons, and contactors without external interface relays. The relay outputs can switch both AC and DC loads, providing flexibility for driving various actuators and indicating devices. Additionally, the embedded 8‑pin mini‑DIN serial port supports multiple protocols, including DF1, DH‑485, ASCII, and MODBUS, enabling easy integration with HMIs, drives, and other automation devices.

Furthermore, the 1762-L24AWA operates on a wide AC supply range from 100 to 240V AC, accommodating global power standards. Its robust design includes high inrush current tolerance and comprehensive isolation, ensuring reliable performance in industrial environments. The controller’s compact footprint and horizontal mounting orientation make it ideal for control panels with limited space.

Whether you are replacing an aging controller or building a new machine, the 1762-L24AWA offers a cost‑effective and dependable solution. Its balanced mix of I/O, communication, and processing power makes it a popular choice among system integrators and OEMs worldwide.

Technical Specifications

The 1762-L24AWA delivers solid performance across its I/O and communication features. Key parameters are detailed below:

Power Supply

• Nominal input voltage: 120/240V AC (100–240V AC range)

• Operating frequency: 47–63 Hz

• Inrush current:

  • 25A for 8 ms at 120V AC

  • 40A for 4 ms at 240V AC

• Power consumption: 68 VA maximum

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

Input Specifications (14 AC Inputs)

• Input type: 120V AC

• On‑state voltage: 79–132V AC

• Off‑state voltage: 0–20V AC

• On‑state current: 5 mA at 79V AC; 16 mA at 132V AC

• Off‑state leakage: 2.5 mA maximum

• Inrush current: 250 mA maximum

• Input impedance: 10 kΩ at 60 Hz; 12 kΩ at 50 Hz

Output Specifications (10 Relay Outputs)

• Contact configuration: Form A (normally open)

• Contact voltage range: 24–125V DC; 120–240V AC

• Maximum load current per output: 8A per group

• Maximum load per controller: 30A at 150V AC; 20A at 240V AC

• Maximum load control: 1440 VA

• Minimum load per point: 10 mA

• Switching delay (ON/OFF): 10 ms

• Mechanical life: 20 million cycles

• Electrical life: Varies with load (consult derating curves)

Communication

• Port: 1 x 8‑pin mini‑DIN serial port

• Supported protocols: DF1, DH‑485, ASCII, MODBUS (RTU)

These specifications ensure that the 1762-L24AWA can handle a wide range of field devices and communication tasks with confidence. The relay outputs are particularly suitable for controlling motor starters, solenoids, and indicator lamps.

Mechanical & Environmental Ratings

The controller is built to withstand typical industrial conditions. 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.)

• Height with DIN latch open: 104 mm (4.09 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

• Certifications: UL, c‑UL, CE

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

Installation Guidelines

Proper installation of the 1762-L24AWA 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 using the integrated clips. Ensure horizontal orientation and adequate clearance for airflow.

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

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

4. Input Wiring: Connect AC field devices to the input terminals. Ensure that the input voltage is 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. Use external surge suppression (RC snubbers or varistors) for inductive loads to extend relay contact life.

6. Communication: Connect the serial port to an HMI, PC, or other devices using a suitable cable. Configure the protocol and baud rate in the controller’s program.

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-L24AWA operates correctly. Check the status LEDs for power, run, and fault conditions. Always observe electrostatic discharge (ESD) precautions when handling the unit.

Packaging List

When you order the 1762-L24AWA, the package includes:

• 1762-L24AWA 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. Can the 1762-L24AWA communicate with a MODBUS network?
Yes, the built‑in serial port supports MODBUS RTU protocol in addition to DF1, DH‑485, and ASCII. This allows you to connect to MODBUS‑compatible drives, instruments, and other devices.

2. What is the maximum number of expansion modules I can add?
The MicroLogix 1200 system supports up to 6 expansion I/O modules when powered from the controller’s internal power supply. Additional expansion may require an external power supply. Always check the total current draw against the controller’s output capacity.

3. Can I use the relay outputs for high‑speed switching applications?
The relay outputs have a mechanical response time of 10 ms, making them suitable for on/off control rather than high‑speed pulse applications. For PWM or fast switching, consider using transistor output modules.

4. What happens if I exceed the maximum inrush current?
The controller is designed to handle the specified inrush current for a short duration. However, repeated or extended over‑current conditions may damage the internal power supply. Always use proper overcurrent protection and ensure the supply is adequately sized.

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.