Frequently Asked Questions
What is Allen-Bradley 1766-L32BWA?
Allen-Bradley 1766-L32BWA is a MicroLogix 1400 programmable logic controller with 32 embedded digital I/O points, a nominal 120/240 VAC power supply, an Ethernet communication port and two serial communication ports.
How many inputs and outputs does 1766-L32BWA have?
The controller provides 20 digital inputs and 12 relay outputs. Its inputs include 12 fast 24 VDC points and eight standard 24 VDC points, giving 32 embedded digital I/O points in total.
What supply voltage does 1766-L32BWA require?
The controller uses a nominal 120/240 VAC supply. The manufacturer specifies a 100-240 VAC input range with -15%/+10% tolerance at 47-63 Hz. It also provides a separate 24 VDC sensor supply rated at 250 mA maximum.
Does 1766-L32BWA have analog inputs or outputs?
No. The 1766-L32BWA does not include embedded analog I/O. The related 1766-L32BWAA version adds four voltage analog inputs and two voltage analog outputs, so the complete catalog number must be checked when analog signals are required.
How much memory does 1766-L32BWA provide?
The controller has 20 KB of battery-backed RAM, divided into 10 KB user program memory and 10 KB user data memory. It also provides 128 KB for data logging, with recipe storage using part of that memory.
What communication ports are available on 1766-L32BWA?
The controller provides one 10/100 Mbps Ethernet RJ45 port, one isolated RS-232/RS-485 port with an eight-pin Mini-DIN connection, and one RS-232 port with a nine-pin D-Sub connection.
Does 1766-L32BWA support EtherNet/IP and Modbus TCP/IP?
Yes. The Ethernet interface supports EtherNet/IP messaging, Modbus TCP/IP and DNP3 over IP. EtherNet/IP messaging support should not be confused with full EtherNet/IP implicit I/O scanning capabilities.
Can 1766-L32BWA be expanded with additional I/O modules?
Yes. The MicroLogix 1400 supports up to seven compatible Bulletin 1762 expansion I/O modules. Selection of expansion modules must consider the controller's power budget and supported module configurations.
What is the difference between 1766-L32BWA and 1766-L32AWA?
The 1766-L32BWA has 20 digital 24 VDC inputs and 12 relay outputs, while the 1766-L32AWA has 20 digital 120 VAC inputs and 12 relay outputs. Both use a nominal 120/240 VAC power supply, but their input circuits are not interchangeable.
What software is used to program 1766-L32BWA?
The controller is programmed using compatible versions of RSLogix 500 or RSLogix Micro software. It uses ladder logic and supports online editing when the software version and controller firmware are compatible.
Does 1766-L32BWA have a built-in LCD and high-speed counters?
Yes. The MicroLogix 1400 includes an LCD and keypad for local monitoring and supported configuration functions. Its 12 fast digital inputs can be used in high-speed counter applications, with up to six high-speed counter channels rated at 100 kHz.
What should be checked before ordering 1766-L32BWA?
Verify the exact catalog number 1766-L32BWA, hardware series and firmware revision, 120/240 VAC power supply, 20 digital 24 VDC input points, 12 relay output points, 20 KB memory capacity, Ethernet and serial communication settings, 1762 expansion module compatibility, program backup, battery condition, open-style enclosure requirements and 180 × 90 × 87 mm controller dimensions before replacing an existing PLC.