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Allen Bradley 1761-L32BWA

Brand: Allen Bradley
Model: 1761-L32BWA

Inventory situation: Goods are available in stock.

Functional Features

The Allen Bradley 1761-L32BWA is a Micro800 series programmable logic controller (PLC) developed for small to medium-sized industrial automation applications. This PLC stands out for its ease of installation, dependable performance, and applicability for applications such as packaging machines, conveyor systems, and small production lines. With 32 I/O ports (16 inputs, 16 outputs) and a 24V DC power supply, it effectively handles basic to moderate control duties, making it a popular choice for small-scale automation projects.

The 1761-L32BWA has a user-friendly programming interface using Allen Bradley's Connected Components Workbench software. Even users with rudimentary automation skills can benefit from this tool, which makes writing logic, testing programs, and debugging easier. It also features built-in communication interfaces (RS-232 and RS-485) that handle protocols such as DF1 and Modbus, allowing it to connect with sensors, motors, and other industrial equipment seamlessly. The PLC's compact size saves space in control cabinets, and its sturdy design works well in conditions with temperatures ranging from 0°C to 60°C, making it suitable for most production settings.

Notably, the Allen Bradley 1761-L32BWA integrates well with the Mitsubishi GT2512-STBD, a high-quality human-machine interface (HMI) from the GOT2000 series. The 1761-L32BWA's Modbus capability enables it to connect effortlessly with the GT2512-STBD, which serves as a visual control center. The GT2512-STBD's 12.1-inch touchscreen displays real-time data from the 1761-L32BWA, including input/output status and machine speeds, allowing operators to easily monitor processes. Its user-friendly interface also enables fast adjustments-such as adjusting production numbers or stopping a conveyor-right from the screen, saving downtime and increasing efficiency.

Specifications

Processor Type	32-bit microprocessor
Input/Output	Supports both analog and digital input/output modules.
Memory	Data storage: relatively small memory capacity, suitable for simple control applications.
Communication	Supports DH-485 and RS-232 communication interfaces.
Dimensions	Height: 90 mm (3.5 inches) Width: 180 mm (7.09 inches) Depth: 70 mm (2.76 inches)
Weight	Approximately 0.9 kg
Power Requirements	Input voltage is generally 24V DC
Environmental Conditions	Operating temperature range: 0°C to 60°C

Application Scenarios

The Allen Bradley 1761-L32BWA is a compact MicroLogix 1000 PLC with 20 digital inputs (24V DC) including 1 high-speed input (up to 6.6 kHz) and 12 relay outputs, designed for small to medium automation tasks requiring reliable control in space-limited environments. This 120/240V AC-powered controller delivers a scan speed of less than 1.2 ms per 1000 Boolean instructions, making it ideal for applications where fast response times matter. Below are its most common real-world applications with measurable benefits.

Municipalities and industrial facilities use the Allen Bradley 1761-L32BWA to control small pump stations with 3-5 pumps. Its 20 digital inputs connect to float switches, pressure sensors, and motor overload protection devices, while the 12 relay outputs manage pump motors, valves, and alarm systems. The high-speed input monitors flow meters to track water usage with 99.5% accuracy, reducing manual data collection time by 75%. The controller's 1KB memory stores pump runtime data, enabling maintenance teams to schedule service based on actual usage rather than fixed intervals, cutting unexpected breakdowns by 40%.

OEMs integrate the Allen Bradley 1761-L32BWA into tabletop packaging machines for food, pharmaceuticals, and consumer goods. It controls conveyor belts, filling nozzles, sealing mechanisms, and label applicators using its 12 relay outputs, while the 20 inputs monitor product presence, lid closure, and temperature sensors. The high-speed input tracks product movement at up to 6.6 kHz, ensuring labels apply within 0.5 mm of the target position, improving labeling accuracy by 35%. This PLC reduces machine setup time from 30 minutes to 10 minutes per product changeover, increasing production line efficiency by 25%.

FAQ

Q: How many I/O points does the 1761-L32BWA have?

A: The Allen Bradley 1761-L32BWA provides 32 total I/O points comprising 20 digital inputs (24V DC, sinking or sourcing configurable) and 12 relay outputs (dry contact, individually isolated). The inputs accept a voltage range of 14–30V DC and include one high-speed counter input rated at 6.6 kHz. This fixed I/O architecture does not support expansion modules-all I/O is contained within the controller itself.

Q: What is the memory capacity and program storage of the 1761-L32BWA?

A: The 1761-L32BWA contains 1K EEPROM non-volatile memory structured as approximately 737 instruction words and 437 data words. The EEPROM retains all ladder logic programs and data without requiring a backup battery, even during extended power outages.

Q: How fast is the processing speed?

A: The controller achieves a throughput of 1.5 milliseconds for a 500-instruction program. For individual bit instructions, the XIC (Examine If Closed) instruction executes in 0.37 microseconds. Typical scan time is approximately 0.9 milliseconds per kilobyte of program.

Q: What are the power supply specifications?

A: The 1761-L32BWA operates on a universal AC power supply accepting 85–264V AC at 47–63 Hz (nominal 120/240V AC). Power consumption measures 16 VA at 120V AC and 22 VA at 240V AC, with inrush current reaching 30 amps for 4 milliseconds at startup. The built-in power supply also provides 400 mA of 24V DC backplane output for powering external sensors directly from the PLC terminals.

Q: What is the operating temperature range?

A: When mounted horizontally, the ambient operating temperature range is 0°C to 55°C (32°F to 131°F). When mounted vertically, the range reduces to 0°C to 40°C (32°F to 104°F) due to reduced heat dissipation. Storage temperature capability extends down to -20°C (-4°F) for non-operating conditions.

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