Allen-Bradley 1762-L40BWA MicroLogix 1200 PLC

The 1762-L40BWA is the Allen-Bradley (Rockwell Automation) catalog number for a MicroLogix 1200 Controller. It is an all-in-one, brick-style Programmable Logic Controller (PLC) engineered for small-scale, standalone machinery and basic industrial automation systems.

Note: The MicroLogix 1200 product line has reached its End of Life (Discontinued) status by Rockwell Automation, making these units highly valuable for factory maintenance, spare-parts inventory, and legacy panel retrofits.

Part Number Breakdown

To understand its exact hardware configuration, the catalog string breaks down as follows:

• 1762: The hardware bulletin series (MicroLogix 1200 / 1762 Expansion I/O).

• L40: Total integrated I/O count (40 local I/O points).

• B: Input Type = 24V DC Inputs.

• W: Output Type = Relay Outputs.

• A: Power Supply Type = 120/240V AC Line Power.

Detailed Technical Specifications

Communication Ports & Memory Backups

• Channel 0 Serial Port (8-pin Mini-DIN): Located behind the lower flip-cover. It supports RS-232 communication using standard DF1 Full-Duplex/Half-Duplex, DH-485, Modbus RTU Slave, or raw ASCII protocols.

• Memory Modules: Accepts the optional 1762-MM1 or 1762-MM1RTC real-time clock and memory backup modules. These allow you to store and execute a backup copy of the ladder logic without requiring a programming terminal on-site.

• Trim Pots: Features 2 built-in analog trim potentiometers on the front faceplate, which allow operators to adjust variables (like timers or counter presets) manually without changing the program code.

Software & Modern Replacement

• Programming Software: Programmed exclusively using RSLogix 5000 or the free RSLogix Micro Starter/English software packages. It is not programmed via Studio 5000.

• Migration Successor: Rockwell Automation recommends transitioning legacy MicroLogix 1200 architectures to the Micro850 or Micro870 PLC family using the Connected Components Workbench (CCW) software utility.