Overview

The QUINT‑PS/1AC/24DC/40 (Part No. 2866789) is a primary‑switched DIN‑rail power supply from Phoenix Contact’s QUINT POWER series. It is engineered for mission‑critical automation systems requiring high reliability, selective protection, and heavy‑load startup.

Key features include Selective Fuse Breaking (SFB) technology, which provides six times the nominal current for 12 ms, allowing circuit breakers to trip quickly and selectively. This isolates only the faulty branch, preventing system‑wide shutdowns.

The unit also incorporates POWER BOOST static reserve to reliably start heavy loads and preventive function monitoring, which continuously reports critical operating states before failures occur, increasing uptime and reducing maintenance costs.

Technical Data

Typical Applications

• Industrial automation panels requiring high‑current 24 V DC distribution.

• Process control systems where preventive monitoring ensures uptime.

• Machine building where heavy loads must be started safely using POWER BOOST.

• Energy systems needing selective fuse protection to isolate faults.

Example: OEMs often use this supply to power PLCs, sensors, actuators, and motor controllers in harsh industrial environments.

FAQ

Q1: What is the output rating of the 2866789 power supply?
A1: It delivers 24 V DC at 40 A, with adjustable voltage from 5 V to 56 V DC.

Q2: What makes SFB technology important?
A2: SFB trips circuit breakers quickly at six times the nominal current, isolating faults without shutting down the system.

Q3: Can it start heavy loads?
A3: Yes, the POWER BOOST reserve ensures reliable startup of demanding loads.

Q4: How does preventive monitoring help?
A4: It reports critical operating states before failures occur, increasing system availability.

Q5: Where is it typically used?
A5: In automation panels, process industries, and machine building where reliability and high current capacity are essential.