Product Overview
The Allen-Bradley 1766-L32BWAA is a MicroLogix 1400 Programmable Logic Controller (PLC) from the Bulletin 1766 family. This compact controller integrates three communication ports—a combo RS232/RS485 port, an isolated RS232 port, and an Ethernet port—offering flexible connectivity for diverse industrial applications. With 38 I/O points, a 20 KB memory, and a built-in real-time clock, the 1766-L32BWAA delivers reliable performance for machine control, process automation, and remote monitoring tasks.
Technical Specifications
The table below lists the key technical parameters for the Allen-Bradley 1766-L32BWAA, sourced directly from the manufacturer's data.
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number / Catalog No. |
1766-L32BWAA |
| Module Type |
Controller |
| Product Family |
MicroLogix |
| Series |
MicroLogix 1400 |
| Product Type |
MicroLogix 1400 Controller |
| Inputs |
(12) Digital Fast 24 Volts DC, (8) Digital Normal 24 Volts DC, (4) Analog |
| Outputs |
(12) Relay, (2) Analog |
| Number of I/O |
38 I/O points |
| Operating Power |
110 to 240 Volts AC |
| Number of Discrete Inputs |
Twelve (12) Fast 24V DC Inputs; Eight (8) Normal 24V DC Inputs |
| Channel Count |
(20) IP, (12) OP |
| Analog Input Signal Range |
0…10.0V DC - 1 LSB |
| Memory |
20 KB |
| Feature |
Built-in RTC |
| Number of Discrete Outputs |
Twelve (12) Relay |
| Mounting Options |
Panel and DIN Rail |
| Number of Analog Outputs |
Two (2) Single Ended |
| Dimensions |
3.5 x 7.08 x 3.43 inches |
| Weight |
2 pounds |
| Power supply |
100/240V AC |
| UPC |
10612598518132 |
| Operating Frequency |
47-63 Hz |
| Power Consumption |
120 VA |
| Power supply inrush current |
120V AC: 25 A for 8 ms; 240V AC: 40A for 4 ms |
| Communication port |
1 RS232 / RS485; 1 Ethernet; 1 RS232 |
| Supported Protocols |
Serial: DF1, ASCII, MODBUS RTU, DNP3, DH485; Ethernet: Ethernet I/P, DNP3, MODBUS TCP/IP |
| Shipping weight |
2 lbs |
Key Features & Benefits
-
Versatile Connectivity: The 1766-L32BWAA includes an isolated RS-232/485 port, a non-isolated RS-232 port, and an Ethernet port. This trio supports serial protocols like DF1, ASCII, Modbus RTU, DNP3, and DH485, plus Ethernet protocols such as EtherNet/IP, DNP3 over IP, and Modbus TCP/IP.
-
Embedded I/O: With 20 digital inputs (12 fast 24V DC, 8 normal 24V DC), 12 relay outputs, 4 analog inputs (0-10V DC), and 2 analog outputs, the controller handles mixed-signal applications without extra modules.
-
Memory & RTC: A 20 KB user memory and a built-in real-time clock (RTC) enable time-based control and data logging.
-
Robust Power Input: Operates on 110-240V AC (100/240V AC) at 47-63 Hz, with power consumption of 120 VA and controlled inrush current.
-
Compact & Mounting Flexibility: Dimensions of 3.5 x 7.08 x 3.43 inches and weight of 2 pounds allow panel or DIN rail mounting.
Industry Applications
The Allen-Bradley 1766-L32BWAA suits various industrial settings:
-
Machine Control: Use the fast 24V DC inputs for high-speed counting and the relay outputs for actuator control in packaging or assembly machines.
-
Process Automation: The analog I/O (0-10V DC) and Ethernet connectivity enable monitoring and control of temperature, pressure, or flow loops in small process systems.
-
Remote Monitoring: With DNP3 and Modbus TCP/IP support, the 1766-L32BWAA can integrate into SCADA systems for remote data acquisition and control.
Installation & Setup
Mount the controller on a panel or DIN rail using the built-in slots. Ensure the enclosure is clean and dry, with circuits not exceeding Over-Voltage Category II. Connect the AC power (100-240V AC) following local codes. For communication, wire the RS-232/485 port for serial devices and the Ethernet port for network integration. Use the built-in LCD and backlight to configure network settings and monitor I/O status during commissioning.
Maintenance & Reliability
Routine checks include verifying power supply stability, inspecting communication cables for damage, and ensuring the enclosure remains dust-free. The battery-backed RAM preserves programs during power loss; replace the battery as recommended by the manufacturer to avoid data loss. Periodic testing of the real-time clock keeps time-based functions accurate.
Compatibility & Integration
The 1766-L32BWAA supports up to seven 1762 expansion I/O modules, allowing system scaling. It communicates with Rockwell Automation software and third-party systems via EtherNet/IP, Modbus TCP/IP, and serial protocols. The embedded web server and email capabilities enable remote diagnostics and notifications.
Buying Guide
Before purchasing, verify your power source (100-240V AC) and required I/O configuration. Consider expansion needs—the 1766-L32BWAA supports up to seven 1762 modules. For reliable sourcing, PLC Source PRO offers genuine Allen-Bradley parts with fast shipping. Ensure the part number matches your application exactly.