SKU: Allen Bradley 1764-24AWA

Allen-Bradley 1764-24AWA MicroLogix 1500 Base Unit

The Allen-Bradley 1764-24AWA is a 120 VAC powered MicroLogix 1500 PLC base unit featuring 12 embedded AC inputs and 12 relay outputs. Brand new factory-sealed units are ready for industrial machinery deployments with fast worldwide shipping. Keep your legacy control panels running efficiently.

The Allen-Bradley 1764-24AWA serves as a modular MicroLogix 1500 Base Unit designed to build a compact programmable logic controller (PLC) footprint. Operating as the foundational hardware carrier, this base unit houses the internal power supply and embedded I/O channels, and it requires a matching 1764 processor module (such as the 1764-LSP or 1764-LRP) to execute user ladder logic programs.

Hardware Specifications

Parameter	Specification
Model	1764-24AWA
Brand	Allen-Bradley / Rockwell Automation
Origin	USA
Weight	0.2 kg (Net Base Only)
Dimensions	9.3 x 7.6 x 4.8 cm
Line Voltage Input	85 to 265 VAC (47 to 63 Hz)
Power Consumption	70 VA maximum
Embedded Inputs	12 Channels, 120 VAC
Embedded Outputs	12 Channels, Individually Isolated Relay Contacts
Continuous Current per Relay	2.5 A per point (8.0 A max per common terminal)
Expansion Capacity	Up to 8 local 1769 Compact I/O modules
Communication Ports	Channel 0 RS-232C (via processor interface)

Local I/O Architecture & Density Scaling

The 1764-24AWA features a split-chassis modular layout that separates the operational processor from the primary field wiring terminal strips. The embedded I/O allocation consists of 12 distinct 120 VAC discrete input circuits and 12 electromechanical relay output contacts. Out of the 12 relay outputs, 2 points feature independent galvanic isolation to allow mixing unique voltage potentials on the same base hardware.

For expanded process architectures, the embedded bus allows high-density scaling. Up to 8 local 1769 Compact I/O expansion modules can be connected directly to the right side of the base unit. Using remote expansion banks, the hardware can address up to a maximum limit of 512 physical I/O points, balancing mid-tier system flexibility with a space-saving footprint.

Frequently Asked Questions

Q: Can the 1764-24AWA run standalone control applications without a processor module?

A: No. The 1764-24AWA is strictly a hardware base containing power supply and I/O routing buses. It must be mechanically mated to a 1764-LSP or 1764-LRP processor unit to form a functional PLC assembly.

Q: What is the configuration rule for expanding 1769 modules on this base?

A: You can connect up to 8 modules locally. However, system power distribution constraints must be verified by calculating the total backplane current draw for the 5 VDC and 24 VDC buses against the integrated 70 VA power supply capacity.

Field Installation Guidelines

DIN Rail Mounting Alignment: Snaps directly onto standard 35 mm symmetric DIN rails. Ensure the rear panel plastic latch is pulled down before placing it on the rail, then push it upward to lock the base securely.
Processor Interlocking: Slide the 1764 series processor straight down into the forward face receptacle of the base module. Ensure the mechanical retaining slide clip snaps shut completely to protect internal backplane continuity.
Terminal Block Torque Adjustments: Wire field loops using the integrated screw terminal block. Tighten the screws to the designated torque limits to maintain consistent connectivity under plant floor vibration.
Airflow Clearance Requirements: Maintain at least 50 mm (2 inches) of open clearance on all sides of the base assembly to ensure natural convection cooling matches the standard environmental rating.