The 1766-L32BWA is a capable member of the MicroLogix 1400 controller family from Allen-Bradley. This model distinguishes itself with a mix of fast and standard DC inputs, making it ideal for applications requiring high-speed counting and precise timing. Its relay outputs provide robust switching for various loads. Additionally, the controller supports multiple communication protocols for flexible integration.
Furthermore, the Allen-Bradley 1766-L32BWA offers enhanced features like a built-in web server and email capabilities. These functions simplify remote monitoring and diagnostics. The unit also includes a backlit LCD screen for convenient local configuration and status checking. Consequently, this controller remains a popular choice for machine builders, even though it has been discontinued. Specifically, its combination of high-speed inputs and versatile networking makes it suitable for a wide range of automation tasks.
The 1766-L32BWA operates on a power supply of 100 to 240V AC at 47-63 Hz. Its power consumption is rated at 120 VA. The controller provides 20 KB of memory for user programs and data storage. For time-sensitive applications, it includes a built-in real-time clock (RTC) for scheduling and event logging.
The I/O configuration is particularly noteworthy. It features twelve (12) fast 24V DC inputs that support a rated frequency of 100 kHz. These are ideal for high-speed counting and positioning applications. Additionally, it includes eight (8) normal 24V DC inputs for general-purpose digital sensing. For outputs, it provides twelve (12) relay outputs that can operate across different voltage categories, ranging from 5 to 125V DC or 5 to 264V AC. This flexibility allows the 1766-L32BWA to energize various electrical loads directly.
Connectivity is a strong point of the MicroLogix 1400 series. The 1766-L32BWA includes three integrated communication ports. First, it has a combo isolated RS-232/RS-485 port. Second, a non-isolated RS-232 port is available for programming or local HMI connection. Third, an Ethernet I/P port supports 10/100 Mbps networked communication.
These ports support a wide array of protocols for maximum flexibility. The serial ports handle DF1, DH-485, Modbus RTU, DNP3 Serial, and ASCII protocols. Meanwhile, the Ethernet port supports Ethernet I/P, DNP3 Ethernet, and Modbus TCP/IP. When configured for Modbus RTU over RS-485, you can implement a daisy-chain topology with up to 32 devices. This is an ideal solution for integrating power meters and other Modbus instruments. Additionally, the Ethernet port provides access to an embedded web server for remote monitoring via standard browsers.
The 1766-L32BWA is designed for standard industrial environments. Its open-style enclosure requires installation inside a control cabinet. The controller measures 90 x 180 x 87 mm (3.5 x 7.08 x 3.43 inches). It weighs approximately 2 pounds (0.9 kg), making it easy to handle and mount.
Furthermore, the controller supports two mounting methods: panel mounting or DIN rail mounting. It is designed for horizontal orientation only. The unit includes a debris strip to protect internal electronics during installation. You should remove this strip after completing all wiring and panel work to ensure proper ventilation. Additionally, the controller is suitable for use in clean, dry locations with circuits not exceeding Over Voltage Category II. The recommended wire size for connections is 22 to 14 AWG.
Proper installation of the 1766-L32BWA ensures reliable long-term operation. First, select a suitable mounting location inside a grounded enclosure. The environment should be free from excessive moisture, dust, and conductive contaminants. Next, choose either panel mounting with screws or secure it onto a standard DIN rail.
During installation, keep the factory-installed debris strip in place. This protects the circuit board from metal shavings and dust generated during panel preparation. After completing all drilling and cutting, remember to remove this strip. Then, proceed with wiring the power supply and I/O connections. Use copper conductors rated for the appropriate temperature. Verify that the input voltage matches the controller's rating before powering up. Finally, secure all wiring connections tightly to prevent intermittent faults and ensure signal integrity.
Your purchase of the 1766-L32BWA will include the following items:
1766-L32BWA Controller Base Unit
Removable Terminal Blocks for I/O wiring
Debris Strip (pre-installed on the unit)
Quick Start Installation Guide
All orders are shipped via FedEx, UPS, or DHL for fast and reliable worldwide delivery.
What is the difference between fast and normal DC inputs on the 1766-L32BWA?
The 1766-L32BWA has twelve fast DC inputs that support 100 kHz high-speed counting. These are ideal for encoders and high-speed sensors. The eight normal DC inputs are for standard digital signals like pushbuttons and limit switches.
Can I expand the I/O of this MicroLogix 1400 controller?
Yes, you can. The Allen-Bradley 1766-L32BWA supports expansion with up to seven 1762-series expansion I/O modules. This allows you to increase the total I/O count as your application requirements grow.
What protocols does the Ethernet port support on this controller?
The Ethernet port on the 1766-L32BWA supports Ethernet I/P, DNP3 Ethernet, and Modbus TCP/IP protocols. This enables seamless connectivity to HMIs, SCADA systems, and other networked devices.
Is the 1766-L32BWA still in production?
No, the 1766-L32BWA has been discontinued by Allen-Bradley. However, it remains available through authorized distributors and aftermarket suppliers while stock lasts. It continues to be a reliable choice for existing installations.
How many Modbus RTU devices can I connect to this controller?
When configured for Modbus RTU over RS-485, the 1766-L32BWA supports a daisy-chain topology with up to 32 devices. This makes it an excellent solution for integrating power meters and other Modbus instruments in a single network.
| Brand Name | |
| Model No. | 1766-L32BWA |
| Product Type | Programmable Logic Controller |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
