Allen-Bradley MicroLogix 1400 Modules: 1766-L32AWA

Technical Dossier

Product Details And Specifications

Allen-Bradley MicroLogix 1400 Series Technical Notes

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

The Evolution of MicroLogix 1400 Architecture

The MicroLogix 1400 was introduced by Rockwell Automation circa 2008 as a successor to the MicroLogix 1200, addressing demand for embedded Ethernet/IP connectivity and expanded analog I/O without migrating to the CompactLogix platform. The core CPU architecture is based on a 32-bit processor running RSLogix 500 / Studio 5000 Logix Designer (via CCW — Connected Components Workbench) firmware. Key architectural milestones include:

Generation 1 (FRN 1.x – 5.x): Initial release with embedded 10/100 Ethernet, RS-232 (Channel 0), RS-232/485 (Channel 1), and 6 analog I/O channels. Data logging via microSD card introduced. Modbus RTU master/slave support added in early firmware revisions.

Generation 2 (FRN 6.x – 21.x): Expanded PID instruction set, enhanced data logging triggers, and improved EtherNet/IP explicit messaging. Firmware 21 represents the final major feature release. Compatibility with 1762-series MicroLogix 1200 expansion I/O modules is maintained throughout all revisions, allowing up to 7 expansion modules for a maximum of 256 I/O points.

End-of-Life Transition: Rockwell Automation announced the MicroLogix 1400 series as end-of-life (EOL) with last-time-buy windows closing progressively from 2022 onward. The recommended migration path is to the Micro820 (2080-series) or Micro850 (2080-series) controllers for new designs, or CompactLogix 5380 for applications requiring higher throughput. However, the installed base remains substantial, and spare parts demand for 1766-series controllers and 1762-series expansion modules continues across maintenance and MRO procurement channels.

MicroLogix 1400 Full Catalog & Functionalities (SKU List)

The following catalog covers the primary 1766-series base units and 1762-series expansion I/O modules compatible with the MicroLogix 1400 platform. All SKUs are genuine Rockwell Automation / Allen-Bradley part numbers.

Base Controller Units (1766-series):

1766-L32AWA: 20 DI / 12 relay DO, 120/240V AC power, embedded Ethernet, RS-232/485, 6 analog I/O, microSD slot — standard AC-powered relay output base unit.

1766-L32BWA: 20 DI / 12 relay DO, 24V DC power supply input, relay outputs — DC-powered variant of the relay output base unit.

1766-L32BXB: 20 DI / 12 transistor (sourcing) DO, 24V DC power — high-speed transistor output base unit for pulse train and encoder applications.

1766-MM1: 1 MB microSD memory card — factory-supplied data logging and recipe storage media for 1766-series controllers.

Expansion I/O Modules (1762-series — MicroLogix 1200/1400 compatible):

1762-IA8: 8-point 120V AC digital input expansion module — extends AC input capacity for field device integration.

1762-IQ8: 8-point 24V DC digital input expansion module — standard DC input expansion for sensor arrays.

1762-IQ16: 16-point 24V DC digital input expansion module — high-density DC input for large I/O count applications.

1762-OA8: 8-point 120/240V AC digital output expansion module — relay-free AC output for solenoid and contactor control.

1762-OB8: 8-point 24V DC sourcing digital output expansion module — transistor output for DC load switching.

1762-OB16: 16-point 24V DC sourcing digital output expansion module — high-density DC output expansion.

1762-OW8: 8-point relay output expansion module — dry contact relay outputs for mixed voltage load control.

1762-OW16: 16-point relay output expansion module — high-density relay output for multi-circuit switching.

1762-IF2OF2: 2 analog inputs / 2 analog outputs expansion — 0–10V / 4–20mA configurable analog I/O for process variable control.

1762-IF4: 4-channel analog input expansion module — 0–10V / 4–20mA / ±10V configurable inputs for multi-sensor process monitoring.

1762-OF4: 4-channel analog output expansion module — 0–10V / 4–20mA configurable outputs for multi-loop control.

1762-IT4: 4-channel thermocouple / RTD input expansion module — direct thermocouple (J, K, T, E, R, S, B) and RTD (Pt100) input for temperature measurement.

1762-IQ8OW6I: 8 DC inputs / 6 relay outputs combination module — mixed I/O expansion for compact panel designs.

1762-NC4: 4-axis high-speed counter / encoder input module — quadrature encoder, pulse, and frequency measurement for motion feedback applications.

Quality Control for the MicroLogix 1400 Range

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.