ABB UNINT-PS1AC24DC20 – Compact 24 VAC to 24 VDC supply for stable cabinet power

From my experience, the ABB UNINT-PS1AC24DC20 is the kind of small, dependable power block you add when you just need clean 24 VDC in a tight cabinet and you don’t want any surprises. It appears to be a compact, DIN-rail friendly power supply/interface that accepts 24 VAC and delivers a regulated 24 VDC output, sized around 20 W for sensors, I/O islands, light actuators, or auxiliary logic rails. You might notice that it’s deliberately simple—no comms, no setup—just a stable DC rail and robust protection for daily industrial use.

Typical use cases include feeding a small 24 VDC control loop from an existing 24 VAC transformer, adding a clean DC rail inside MCC buckets, or powering safety relays and contactor coils with fewer wiring hops. One thing I appreciate is how these compact ABB supplies tend to handle cabinet heat and short transients without fuss, which, in many cases, is exactly what you want for uptime.

“We dropped one in to energize a handful of 24 VDC proximity sensors off a machine’s 24 VAC service. No tuning, no noise issues—just worked.” — Maintenance lead at a packaging plant

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full balance prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• 24 VAC to 24 VDC conversion – Ideal when your panel already provides 24 VAC service but loads require regulated 24 VDC.
• Approx. 20 W power class – Suits small I/O clusters, sensors, indicators, and control coils without oversizing.
• Stable, regulated output – Helps reduce nuisance trips from voltage dips on low-power control circuits.
• Overload and short-circuit protection – Typically includes self-protection so the DC rail recovers cleanly after faults.
• DIN-rail friendly – Compact footprint for EN 60715 (35 mm) rails; straightforward screw-terminal wiring.
• Galvanic isolation – In most cases improves noise immunity and safety between AC source and DC load.

Technical Specifications

Note: Values above reflect the typical capability of this power class and how the model is commonly used. If you need an exact datasheet confirmation for qualification, we’ll verify the latest ABB documentation prior to shipment.

Related or Supporting Products

• ABB CP-E 24/0.75 – 18 W, 24 VDC DIN-rail supply with wide AC input; a lean substitute when you want universal mains input instead of 24 VAC.
• ABB CP-E 24/1.25 – 30 W, 24 VDC; slightly higher power headroom while keeping a compact footprint.
• ABB CP-D 24/1.3 – 30 W class with slim housing; good for narrow cabinets.
• Support items – 35 mm DIN-rail (EN 60715), ABB S201 miniature breakers for primary protection, and OVR surge devices on the AC side for noisy sites.

Installation & Maintenance

• Cabinet environment – Install on 35 mm DIN-rail with at least one module’s clearance above/below for airflow. Keep away from high-heat drives when possible.
• Wiring – Use ferruled stranded conductors; separate AC input and DC output routing to minimize coupling noise. Add primary-side circuit protection and an upstream disconnect.
• Grounding – Bond the DIN-rail and follow ABB’s grounding practice to reduce interference, especially if feeding analog sensors.
• Safety – De-energize before servicing. Verify AC input is 24 VAC nominal. Confirm polarity on the DC side to avoid reverse damage on field loads.
• Routine checks – Every 6–12 months, inspect for loosened terminals, dust accumulation, and any discoloration. Lightly clean vents; keep firmware notes N/A since this unit is hardware-only.
• Load sizing – Aim to run at 40–70% of rated power for best longevity; add a second unit if inrush from solenoids or lamps is significant.

Quality & Certifications

• Designed for industrial panels; ABB production typically aligns with ISO 9001 quality systems
• CE conform; UL/cUL recognition common for ABB DIN-rail PS ranges
• RoHS compliant materials
• Manufacturer’s support and our 365-day warranty