Product Overview

The Allen-Bradley 2080-PS120-240VAC​ is a system power supply module developed by Rockwell Automation for the Allen-Bradley Micro800 family of programmable logic controllers (Micro820, Micro830, Micro850, Micro870). Designed to mount directly onto the left end of a Micro800 expansion rack or inside a Micro820 base unit’s power bay, the Allen-Bradley 2080-PS120-240VAC​ converts a wide-range single-phase AC mains input (100–240 V AC, 50/60 Hz) into a regulated 24 V DC output capable of supplying up to 3.0 A (72 W) to power the Micro800 processor, connected expansion I/O modules, and optionally a limited number of external 24 V DC field devices such as sensors or small pilot loads—provided the total current does not exceed the supply’s rated capacity.The Allen-Bradley 2080-PS120-240VAC​ is a passive module in terms of communication—it does not consume I/O image table space nor require configuration in CCW (Connected Components Workbench)—but it is essential for establishing the 5 V DC and 24 V DC backplane rails that the processor and I/O modules draw from. A green PWR LED on the front indicates that the AC input is present and the 24 V DC output is within specification; a missing or dim LED typically points to loss of AC mains, incorrect wiring polarity on the AC side, or an overloaded DC output. The Allen-Bradley 2080-PS120-240VAC​ includes short-circuit and overload protection on the 24 V DC side, automatically recovering when the fault condition is cleared. Its compact footprint (matching a single Micro800 module width) and tool-less DIN rail latch make it a straightforward addition to any Micro800 panel build.For machines and OEM equipment standardized on the Micro800 platform, the Allen-Bradley 2080-PS120-240VAC​ delivers globally acceptable AC input compatibility (100–264 V AC), eliminating the need for region-specific power supplies when shipping equipment internationally. It is the standard AC-powered supply recommended for Micro830, Micro850, and Micro870 racks; the smaller Micro820 (2080-LC20-xxx) typically has an integral power input but can also benefit from a clean 24 V DC feed from a separately mounted Allen-Bradley 2080-PS120-240VAC​ in panel when external sensor power is required.

Technical Specifications

Product Model | 2080-PS120-240VACManufacturer | Rockwell Automation / Allen-BradleyProduct Type | Micro800 Series System Power Supply Module (AC Input / 24 V DC Output)Input Voltage Range | 100–240 V AC (single phase), 50/60 Hz, universal rangeInput Current (Typical) | 1.5 A @ 100 V AC ; 0.8 A @ 240 V ACOutput Voltage | 24 V DC nominal (±5 %)Rated Output Current | 3.0 A maximum @ 24 V DC (72 W)Inrush Current | < 30 A peak (cold start, < 1 ms)Hold-Up Time | > 20 ms @ full load, nominal inputOverload Protection | Current-limited; auto-recovery on fault removalShort Circuit Protection | Yes (latching or hiccup mode, auto-restart after removal)Backplane Power Provided | 5 V DC & 24 V DC to Micro800 rack backplane busMaximum Backplane Load Supported | Per Micro800 system design (typically up to 4–8 expansion modules depending on current draw)Indicators | 1 × Green LED (PWR — illuminated when 24 V DC output is valid)Mounting | 35 mm DIN Rail (EN 60715) or direct panel mount; tongue-and-groove interlock with Micro800 modulesDimensions (H×W×D) | Approx. 90 × 40 × 75 mm (3.54 × 1.57 × 2.95 in.) — 1 Micro800 module widthWeight | Approx. 160 g (0.35 lb)Operating Temperature | 0 °C to +55 °C (+32 °F to +131 °F)Storage Temperature | -40 °C to +85 °CHumidity | 5 %–95 % RH, non-condensingVibration / Shock | 5G @ 10–500 Hz (operating); 25G shock (panel mount)Certifications | UL 508, cULus Listed, CE Marked, KC, RoHS Compliant, Class I Div 2 (some revisions)Wiring Method | Screw terminals (AC input L/N/PE; DC output +/–)

Main Features and Advantages

Universal AC Input for Global OEM Deployment:The Allen-Bradley 2080-PS120-240VAC​ accepts any AC mains voltage between 100 V and 240 V AC (47–63 Hz), making it suitable for equipment exported to North America (120 V AC), Europe (230 V AC), or Asia-Pacific markets without change. This universal-input design eliminates the need to stock region-specific power supplies and simplifies bill-of-materials management for machine builders.Sufficient Capacity for Processor + I/O + Light Field Loads:With a 3.0 A (72 W) 24 V DC output, the Allen-Bradley 2080-PS120-240VAC​ comfortably powers a Micro850 processor, up to six or eight typical 8-point digital I/O expansion modules, and a modest number of 24 V DC sensors (proximity switches, photoeyes) or a small HMI backlight load—provided the sum of backplane + external loads stays ≤ 3 A. For heavier external loads, Rockwell recommends a separate 24 V DC auxiliary supply, but the built-in capacity covers most compact machine applications.Integrated Overload and Short-Circuit Protection:The 24 V DC output stage of the Allen-Bradley 2080-PS120-240VAC​ is protected against overload and short circuit. If a field wire fault draws excess current, the supply folds back or latches off and automatically attempts recovery once the fault clears—protecting both the supply and downstream modules. This reduces nuisance tripping and the need for external fusing on the 24 V DC side in many installations.