Phoenix Contact 2866789 QUINT-PS/1AC/24DC/40 Power Supply

Phoenix Contact 2866789 QUINT-PS/1AC/24DC/40 Power Supply: Compatibility and Replacement Notes

In modern industrial automation, the power supply layer is not a passive component — it is the structural foundation upon which every other control system layer depends. The Phoenix Contact 2866789 QUINT-PS/1AC/24DC/40 is a high-performance, single-phase DIN-rail mounted power supply delivering a stable 24VDC output at 40A continuous current. Engineered for demanding industrial environments, this unit is purpose-built for integration within QUINT-series control architectures, where consistent power delivery, intelligent diagnostics, and system-level coordination are non-negotiable requirements.

Unlike generic power supplies, the QUINT-PS/1AC/24DC/40 is designed with system integration in mind. Its SFB (Selective Fuse Breaking) technology enables it to reliably trip downstream circuit breakers — including Phoenix Contact QUINT-FUSE and QUINT-DIODE modules — even under high-impedance fault conditions. This capability transforms the power supply from a simple energy converter into an active participant in the system’s protection and fault-isolation architecture.

Product Specification Table

System Compatibility Notes

The QUINT-PS/1AC/24DC/40 (2866789) is most effectively deployed as the central power node in a multi-tier control cabinet architecture. In a typical QUINT-based system, this power supply feeds a 24VDC bus that simultaneously powers the CPU module, distributed I/O racks, communication gateways, and HMI panels — all of which must receive clean, regulated power to maintain deterministic control behavior.

At the control layer, the QUINT-PS/1AC/24DC/40 provides the stable 24VDC rail required by Phoenix Contact RFC 460R or RFC 470S ILC controllers, as well as third-party PLCs such as Siemens S7-300/S7-400 CPUs or Allen-Bradley ControlLogix processors installed in the same cabinet. The 40A output capacity ensures that even during cold-start inrush events — when multiple I/O modules and communication cards initialize simultaneously — the bus voltage remains within tolerance.

At the I/O layer, the power supply directly supports Phoenix Contact Axioline F and Inline I/O modules, which are commonly deployed in distributed I/O configurations across the same DIN rail segment. The QUINT-DIODE redundancy module can be paired with a second QUINT-PS unit to create a 1+1 redundant power architecture, eliminating single points of failure in critical process control applications.

At the network and communication layer, the stable 24VDC output powers communication gateways such as the Phoenix Contact FL SWITCH 2000 series managed Ethernet switches and FL COMSERVER UNI serial-to-Ethernet converters, ensuring that PROFINET, EtherNet/IP, or Modbus TCP communication remains uninterrupted even during load transients on the power bus.

At the HMI layer, the QUINT-PS/1AC/24DC/40 supplies power to operator panels and touch screens — including Phoenix Contact TP 3057T or third-party Weintek and Siemens TP700 Comfort panels — which require a clean, low-ripple 24VDC supply to maintain display stability and touchscreen responsiveness during high-load periods.

At the execution layer, the power supply supports relay output modules, motor starter modules, and solenoid valve drivers. The SFB boost current (up to 80A for 12 seconds) ensures that downstream Phoenix Contact QUINT-FUSE branch circuit protectors trip cleanly under fault conditions, preventing nuisance shutdowns of adjacent circuits and maintaining system uptime.

For energy buffering and ride-through applications, the QUINT-PS/1AC/24DC/40 integrates seamlessly with the QUINT-BUFFER/24DC/40 capacitor module and the QUINT-UPS/24DC/20 uninterruptible power supply module, providing bridging times of up to several seconds during mains interruptions — a critical requirement in water treatment SCADA systems, oil and gas DCS panels, and pharmaceutical batch control cabinets.

Industrial Application Notes

The Phoenix Contact 2866789 QUINT-PS/1AC/24DC/40 is deployed across a wide range of industrial sectors where power supply reliability directly impacts process continuity and safety:

Manufacturing and Discrete Automation: In automotive body-in-white welding lines and electronics assembly SMT lines, the QUINT-PS/1AC/24DC/40 powers robot controller I/O interfaces, vision system lighting controllers, and conveyor drive enable circuits. Its 40A capacity supports high-density I/O racks without requiring parallel power supply configurations.

Power Generation and Electrical Utilities: In substation automation panels and generator control systems, the QUINT-PS/1AC/24DC/40 provides the 24VDC supply for IEC 61850-compliant protection relay auxiliary circuits, RTU communication modules, and bay controller I/O cards. Its wide input voltage range (85–264VAC) accommodates unstable grid conditions common in remote power generation sites.

Oil, Gas, and Petrochemical: In ATEX Zone 2 classified control rooms and marshalling cabinets, the QUINT-PS/1AC/24DC/40’s ATEX certification allows direct installation without additional enclosure barriers. It powers SIL-rated safety I/O modules and ESD system logic solvers in compliance with IEC 61511 functional safety requirements.

Water and Wastewater Treatment: In SCADA-controlled pump stations and filtration plant MCC panels, the QUINT-PS/1AC/24DC/40 supplies power to flow transmitters, level sensors, and variable frequency drive enable circuits. The integrated relay signal output allows the SCADA system to monitor power supply health and trigger alarms before a failure occurs.

Mining and Metallurgy: In underground conveyor control panels and surface processing plant DCS cabinets, the QUINT-PS/1AC/24DC/40 operates reliably across the full -25°C to +70°C temperature range, making it suitable for both climate-controlled control rooms and non-air-conditioned field junction boxes.

Packaging and Process Lines: In high-speed filling, labeling, and palletizing lines, the QUINT-PS/1AC/24DC/40 supports servo drive enable circuits, pneumatic valve manifold solenoids, and barcode scanner power rails — all from a single, compact DIN-rail mounted unit that minimizes cabinet footprint while maximizing available current capacity.

Product Compatibility FAQ

Q1: Can the QUINT-PS/1AC/24DC/40 (2866789) be used in a redundant power supply configuration, and what additional components are required?
Yes. The QUINT-PS/1AC/24DC/40 is fully compatible with the Phoenix Contact QUINT-DIODE/40 redundancy module, which allows two QUINT-PS units to be connected in a 1+1 redundant configuration. The QUINT-DIODE module prevents reverse current flow between the two power supplies and provides automatic switchover in the event of a primary supply failure. No additional programming or configuration is required — the redundancy is handled entirely at the hardware level, making it suitable for SIL 2 and SIL 3 safety-instrumented system power architectures.

Q2: How does the SFB (Selective Fuse Breaking) technology affect compatibility with downstream circuit protection devices in a QUINT architecture?
SFB technology allows the QUINT-PS/1AC/24DC/40 to deliver up to 200% of its rated output current (approximately 80A) for up to 12 seconds during a downstream short-circuit event. This high-current pulse is specifically calibrated to reliably trip Phoenix Contact QUINT-FUSE branch circuit protectors and standard DIN-rail circuit breakers, even under high-impedance fault conditions where a conventional power supply would simply current-limit and leave the fault uncleared. Engineers should verify that all downstream branch circuit protectors have a rated breaking current below the SFB boost level to ensure selective tripping behavior.

Q3: What is the warranty coverage for the QUINT-PS/1AC/24DC/40 (2866789) supplied by ZYPLC, and what does it include?
All Phoenix Contact QUINT-PS/1AC/24DC/40 units supplied by ZYPLC are covered by a warranty terms confirmed during quotation from the date of shipment. This warranty covers manufacturing defects, component failures under normal operating conditions, and functional non-conformance to published specifications. ZYPLC provides pre-shipment functional testing and documentation for each unit. For warranty claims or technical support, contact ZYPLC at plc.sales@zyplc.com or +86 19859288691.