Introduction
Plant floors have changed. Machines that once ran on hard-wired relay logic now demand compact controllers that speak to HMIs, SCADA systems, and enterprise databases at the same time. The Allen-Bradley 1766-L32AWA answers that shift. As a MicroLogix 1400 controller, it packs 32 I/O points, three communication ports, and a built-in LCD screen into a panel-mount package measuring just 90 x 180 x 87 mm. For oil, gas, and industrial automation teams, that combination means fewer components, simpler panels, and faster commissioning.
What the 1766-L32AWA Delivers
The 1766-L32AWA is a MicroLogix 1400 Controller under the Bulletin 1766 family. It runs on 100/240V AC power at 47-63 Hz with 100 VA consumption, so it drops into most existing control cabinets without a separate DC supply. The unit carries 20 digital 120V AC inputs and 12 relay outputs, giving 32 I/O points total. A built-in real-time clock supports time-based control, and 20 KB of memory handles user programs and data.
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | MicroLogix 1400 Controller |
| Number of I/O | 32 points |
| Discrete Inputs | Twenty (20) 120VAC |
| Discrete Outputs | Twelve (12) Relay |
| Power Supply | 100/240V AC |
| Operating Frequency | 47-63 Hz |
| Power Consumption | 100 VA |
| Communication Ports | 1 RS232/RS485; 1 Ethernet; 1 RS232 |
| Supported Protocols | Serial: DF1, ASCII, MODBUS RTU, DNP3, DH485; Ethernet: DNP3, MODBUS TCP/IP |
| Memory | 20 KB |
| Dimensions | 90 x 180 x 87 mm |
| Mounting | Panel Mounting / DIN Rail |
Communication That Connects Every Level
The 1766-L32AWA ships with three integrated ports. Channel 0 is an 8-pin mini DIN RS-232C/RS-485 combo port. Channel 1 is an RJ45 Ethernet port. Channel 2 is a non-isolated RS-232 port. Serial channels support DF1, ASCII, MODBUS RTU, DNP3, and DH485. The Ethernet channel supports DNP3 and MODBUS TCP/IP. That range lets the controller link machine-level HMIs, supervisory SCADA systems, and enterprise databases without extra hardware.
Integration Note
Wiring into these networks may require an external gateway or connection module. Confirm cables and gateways with your supplier before ordering.
Where It Fits
In oil and gas, the 1766-L32AWA suits wellhead control panels and small pump stations where 120V AC field devices are common. In water treatment, its relay outputs drive pumps and valves directly. On packaging lines, the Ethernet port feeds production data to supervisory systems while serial ports handle legacy devices. The built-in RTC supports shift-based scheduling and time-stamped events.
Installation and Maintenance
Mount the controller horizontally on a grounded panel or DIN rail inside an enclosure. Keep it in a clean, dry environment with circuits not exceeding Over Voltage Category II. A debris strip protects the circuitry during panel work; remove it once installation is complete. For expansion, up to seven 1762 expansion I/O modules can be added. Inspect connections periodically and follow the manufacturer’s manual for all service procedures.
Selection Checklist
Before ordering, confirm your input voltage, I/O count, and communication needs match this configuration. Verify current lifecycle status and availability with Oil AutoTech before ordering. Contact Oil AutoTech today for pricing and availability.
Frequently Asked Questions
What is the input voltage range of the 1766-L32AWA?
The controller operates on 100/240V AC power at 47-63 Hz.
How many communication ports does it have?
It has three: one RS232/RS485 combo port, one Ethernet port, and one RS232 port.
Can I expand the I/O?
Yes. Up to seven 1762 expansion I/O modules can be connected to the base unit.
What protocols does it support?
Serial channels support DF1, ASCII, MODBUS RTU, DNP3, and DH485. Ethernet supports DNP3 and MODBUS TCP/IP.
How is it mounted?
It supports panel mounting or DIN rail mounting in a horizontal orientation.
