Allen-Bradley 1764-24BWA Base Unit SLC 500 Series

The Allen-Bradley 1764-24BWA MicroLogix 1500 Base Unit is a 12-input, 12-output base module for MicroLogix 1500 controllers, designed for compact discrete control tasks. It accepts twelve 24V DC inputs (input circuit type 24 VDC sink/source) and provides twelve relay outputs, enabling straightforward wiring to field devices. The base unit is powered from 85–265 VAC and offers a 24V DC user power output up to 400 mA (400 µF max); power-on surge ratings are 25 A for 8 ms at 120 VAC and 40 A for 4 ms at 240 VAC. Its enclosure measures 6.62 x 3.43 x 5.43 inches and supports DIN rail or panel mounting, includes an RS-232 serial port for programming, and can expand to a total of 512 I/O with compatible expansion modules. This configuration is well suited for small to mid-size automation applications requiring reliable discrete I/O, flexible mounting, and expansion potential within the MicroLogix 1500 ecosystem.