Product Introduction
The Allen-Bradley 1766-L32BWAA is a MicroLogix 1400 Programmable Logic Controller from the Bulletin 1766 family. Designed for demanding industrial applications, this compact controller integrates three communication ports—a combo RS232/RS485 port, an isolated RS232 port, and an Ethernet port—along with embedded I/O channels. With 38 I/O points, it delivers flexible control for a wide range of automation tasks.
Technical Specifications
Below are the key parameters of the Allen-Bradley 1766-L32BWAA, sourced directly from the manufacturer's data:
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1766-L32BWAA |
| Module Type |
Controller |
| Product Family |
MicroLogix |
| Series |
MicroLogix 1400 |
| Inputs |
12 Digital Fast 24V DC, 8 Digital Normal 24V DC, 4 Analog |
| Outputs |
12 Relay, 2 Analog |
| Number of I/O |
38 I/O points |
| Operating Power |
110 to 240 Volts AC |
| Analog Input Signal Range |
0…10.0V DC |
| Memory |
20 KB |
| Feature |
Built-in RTC |
| Mounting Options |
Panel and DIN Rail |
| Dimensions |
3.5 x 7.08 x 3.43 inches |
| Weight |
2 pounds |
| Power Supply |
100/240V AC |
| Operating Frequency |
47-63 Hz |
| Power Consumption |
120 VA |
| Communication Ports |
1 RS232/RS485, 1 Ethernet, 1 RS232 |
| Supported Protocols |
Serial: DF1, ASCII, MODBUS RTU, DNP3, DH485; Ethernet: Ethernet I/P, DNP3, MODBUS TCP/IP |
Key Features & Benefits
-
Integrated Communication: The 1766-L32BWAA includes an isolated RS-232/485 port, a non-isolated RS-232 port, and an Ethernet port, enabling seamless integration into existing networks.
-
Flexible I/O Configuration: With 12 fast 24V DC inputs, 8 normal 24V DC inputs, 12 relay outputs, and 4 analog inputs plus 2 analog outputs, this controller adapts to various control requirements.
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Enhanced Diagnostics: A built-in LCD with backlight allows easy network configuration and real-time status monitoring of the controller and I/O.
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Time-Based Control: The embedded real-time clock (RTC) provides accurate timestamping for applications that require time-stamped events.
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Expandable: Supports up to seven 1762 expansion I/O modules, offering scalability for growing applications.
Industry Applications
The Allen-Bradley 1766-L32BWAA excels in applications that demand reliable, mixed-signal control. In packaging machinery, its fast 24V DC inputs and relay outputs handle high-speed counting and actuator control. For material handling systems, the Ethernet port enables remote monitoring via Modbus TCP/IP or EtherNet/IP, while the analog channels manage variable speed drives. In water treatment facilities, the DNP3 protocol support allows seamless integration with SCADA systems, ensuring efficient process control.
Installation & Setup Guidance
Mount the 1766-L32BWAA on a standard DIN rail or panel using the integrated slots. Ensure the enclosure is open and the environment is clean and dry, with circuits not exceeding Over-Voltage Category II. Connect AC power (110-240V AC) via the terminal block, observing correct polarity. For serial communication, use the combo RS232/485 port for multi-drop networks; the isolated RS232 port is ideal for direct PC connections. The Ethernet port supports standard RJ45 cabling; configure IP settings via the built-in LCD or web server. Verify all wiring before power-up to avoid damage.
Maintenance & Reliability
Routine maintenance of the 1766-L32BWAA is minimal but essential for long-term reliability. Periodically inspect the controller for dust accumulation on the vents and ensure the ambient temperature stays within specified limits. Check the battery-backed RAM battery every two years; replace it proactively to prevent program loss. Verify that all communication cables are securely seated and free from corrosion. Following these simple steps will maximize uptime and extend the service life of your investment.
Compatibility & Integration
The 1766-L32BWAA integrates seamlessly with other Rockwell Automation components, including 1762 expansion I/O modules. Its serial ports support DF1, ASCII, Modbus RTU, DNP3, and DH485 protocols, while the Ethernet port supports EtherNet/IP, DNP3, and Modbus TCP/IP. This makes it compatible with a broad range of HMIs, SCADA systems, and third-party devices. The controller also features a built-in web server and email capabilities, allowing remote diagnostics and notifications.
Selection Guide & Purchasing Advice
Before purchasing the Allen-Bradley 1766-L32BWAA, verify your power supply voltage (100-240V AC) and communication protocol requirements. Confirm the number of I/O points and whether expansion modules are needed. For applications requiring high-speed counting, note the up to 6 embedded 100 kHz high-speed counters. PLC Source PRO offers genuine, factory-sealed units with fast shipping. Contact our team to ensure compatibility with your existing system or to discuss volume pricing.