Configured for discrete AC input sensing and relay output switching in the MicroLogix 1400 platform, the Allen-Bradley 1766-L32AWA (1766L32AWA Controller) provides 32-point control with 20 KB battery-backed RAM and an AC power supply.

Model and Configuration

The supplied data identifies 1766L32AWA as the compact catalog reference for 1766-L32AWA. No additional suffix interpretation is assigned because the supplied documentation does not define the individual characters of the catalog number.

Controller Specifications

Discrete I/O and Control Architecture

The controller provides 20 discrete inputs and 12 relay outputs. The supplied input specification identifies the discrete inputs as 120 VAC, while the controller power supply is specified as 100-240 VAC with an operating frequency of 47-63 Hz.

The 12 relay outputs provide electrically switched contacts for discrete control circuits. Relay outputs should be connected according to the electrical characteristics of the controlled load and the applicable wiring requirements.

The 32-point I/O arrangement is integrated into the MicroLogix 1400 controller rather than implemented as a separate I/O expansion module.

Memory and Industrial Control Interface

The 1766-L32AWA contains 20 KB of battery-backed RAM according to the supplied technical data. Battery-backed memory requires the installed battery system to remain within its specified service condition to preserve retained data.

As part of the MicroLogix 1400 platform, controller communication and programming functions depend on the complete controller configuration. No specific communication port parameters, protocol settings, or firmware revision are provided in the supplied information and are therefore not assigned here.

AC Power and Relay Switching

The controller accepts an AC supply identified as 100-240 VAC, with a stated operating range of 110-240 VAC. The listed operating frequency is 47-63 Hz.

The 12 relay outputs are separate from the 20 AC discrete inputs. Field wiring should maintain appropriate segregation between input circuits, relay load circuits, and the controller power supply.

No numerical power consumption value is provided in the supplied data. A specific consumption figure should therefore be obtained from the applicable manufacturer documentation rather than estimated.

Ordering Information

• 1 x Allen-Bradley 1766-L32AWA MicroLogix 1400 Controller
• Catalog reference: 1766-L32AWA
• Alternate catalog reference: 1766L32AWA
• Integrated configuration: 20 discrete inputs and 12 relay outputs
• Memory: 20 KB battery-backed RAM
• No separate expansion module or accessory kit is identified in the supplied product information.

Installation and Wiring Notes

• Verify the AC supply voltage before energizing the controller.
• Maintain correct separation between AC input wiring, relay output wiring, and controller power conductors.
• Use field protection appropriate to the connected relay loads and AC circuits.
• Do not exceed the electrical ratings applicable to the relay output contacts.
• Confirm input circuit voltage before connecting the 20 discrete inputs.
• Secure all field conductors to prevent intermittent contact caused by vibration or mechanical movement.
• Route control wiring away from high-current conductors where practical to reduce electrical interference.
• Confirm the battery condition when retained RAM data is required.
• Do not assume hot-swap operation unless explicitly supported by the complete MicroLogix 1400 installation configuration.

Frequently Asked Questions

• How many I/O points does the 1766-L32AWA provide?

  The controller has 32 integrated I/O points: 20 discrete inputs and 12 relay outputs.

• What type of inputs are provided?

  The supplied data identifies 20 discrete inputs rated for 120 VAC operation.

• What type of outputs does the controller use?

  Twelve relay contact outputs are provided. The supplied information does not specify individual contact voltage or current ratings.

• What is the controller memory capacity?

  The 1766-L32AWA provides 20 KB of battery-backed RAM according to the supplied product information.

• What power supply does the controller require?

  The supplied data identifies a 100-240 VAC power supply and states an operating power range of 110-240 VAC.

• What operating frequency is specified?

  The AC supply frequency is specified as 47-63 Hz. No separate frequency range is provided for individual I/O circuits.

• Is power consumption specified?

  No numerical power consumption value is included in the supplied information. A value should not be inferred without manufacturer documentation.

• Can the relay outputs be treated as DC transistor outputs?

  No. The supplied specification identifies the 12 outputs as relay contacts. Their switching characteristics must therefore be evaluated according to the applicable relay specifications.