Overview
The Phoenix Contact QUINT-PS/1AC/24DC/40 is a primary-switched power supply unit designed for demanding industrial automation applications. This 24V/960W unit delivers 40A continuous output with single-phase AC input and DIN-rail mounting via screw connections. The QUINT POWER platform combines robust circuit protection, preventive diagnostics, and configurable output voltage adjustment to maximize system uptime.
Key Features
- SFB Technology (Selective Fuse Breaking): Magnetic circuit breakers trip at six times nominal current, enabling selective fault isolation while maintaining operation of unaffected circuits.
- Static Power Boost: Reliable starting of heavy loads through static power reserve POWER BOOST, supporting inrush currents up to 1.5× nominal current.
- Preventive Function Monitoring: High system availability ensured through preventive function monitoring, which reports critical operating states before errors occur.
- Adjustable Output Voltage: Output adjustable from 18 V DC to 29.5 V DC, covering typical industrial 24V requirements with tolerance margin.
- Wide Input Range: Input voltage 85-240 Vac or 90-350 Vdc for global compatibility.
- Industrial Reliability: Tested in accordance with ISA G3 Harsh Group A standard for corrosive-gas environments.
Technical Specifications
- Output Voltage: 24 V DC (adjustable 18–29.5 V DC)
- Output Current: 40 A continuous; 60 A boost (short duration)
- Output Power: 960 W nominal
- Input Voltage (AC): 100–240 V AC, −15% to +10%
- Input Voltage (DC): 90–300 V DC
- Frequency Range: 50/60 Hz (±10%)
- Mounting: DIN rail (35 mm)
- Connection: Screw terminals
- Operating Temperature: −10 to +60 °C (standard); −13 to +158 °F
- Protection Features: SFB technology, surge protection, preventive diagnostics
- Standards: ISA G3 Harsh Group A, industrial automation certifications
Typical Applications
- PLC and industrial control system power
- Distributed I/O and valve manifold supply
- Motion control and servo drive supply
- HMI and gateway power for automation networks
- Remote and mining site equipment (wide input, harsh-environment rated)
- Manufacturing systems requiring high uptime and load protection
Compatibility & Replacements
Compatible With
- Allen-Bradley PLCs and I/O modules (24V DC field power)
- Siemens S7 and SIMATIC controllers
- Mitsubishi, Omron, and other 24V DC automation devices
- Distributed I/O racks and terminal modules
- Industrial networking (PROFINET, EtherNet/IP) equipment
- Safety relays and control modules rated 24V DC
Replaces / Drop-In Replacement For
- Phoenix Contact QUINT-PS/1AC/24DC series (legacy models)
- Other 24V/40A industrial power supplies in equivalent form factor
- Verify mechanical fit and terminal configuration before replacement
Works With
- QUINT POWER software for configuration and diagnostics
- NFC interface for non-contact parameter adjustment (QUINT4 models)
- Standard 24V DC automation ecosystems
- Surge protection modules and monitoring devices




















