Phoenix Contact QUINT-PS/1AC/24VDC/10 2866763 Retrofit Power Supply

Phoenix Contact QUINT-PS/1AC/24VDC/10 2866763: Retrofit-Compatible Power Supply for Legacy Automation Systems

The Phoenix Contact QUINT-PS/1AC/24VDC/10 (Part No. 2866763) is a high-performance, single-phase DIN rail power supply delivering a regulated 24 VDC output at 10 A continuous current. Designed for demanding industrial environments, this unit is a direct retrofit replacement for aging or discontinued power supply modules within the QUINT Power series — one of Phoenix Contact’s most widely deployed power supply platforms across process automation, machine control, and panel-building applications worldwide.

As legacy control systems age and original spare parts become increasingly difficult to source, the QUINT-PS/1AC/24VDC/10 2866763 provides a reliable, drop-in compatible solution that minimizes engineering rework and reduces system downtime during modernization projects. Whether you are replacing a failed unit in an existing control cabinet, upgrading an aging power distribution rail, or migrating a legacy PLC platform to a modern architecture, this power supply is engineered to integrate seamlessly into your existing infrastructure.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the QUINT-PS/1AC/24VDC/10 2866763 into a legacy control system begins with a thorough audit of the existing power distribution architecture. In most retrofit scenarios, this unit replaces a failed or end-of-life power supply feeding a 24 VDC backplane bus that powers a mix of I/O modules, communication gateways, and field devices. Before removing the old unit, engineers should document the total connected load — including all Phoenix Contact QUINT-ORING redundancy modules, STEP-PS or TRIO-PS auxiliary supplies, and any downstream 24 VDC consumers such as Siemens ET 200SP I/O stations or Allen-Bradley 1734 POINT I/O adapters sharing the same distribution rail.

Terminal wiring is a critical checkpoint. The QUINT-PS/1AC/24VDC/10 uses clearly labeled L, N, PE input terminals and +24V / 0V / PE output terminals. When replacing an older unit, verify that existing wire ferrules are in good condition and that cable cross-sections fall within the 0.2–10 mm² acceptance range. In cabinets where the original wiring used ring terminals, plan for a brief re-termination step. If the control cabinet also houses a Phoenix Contact QUINT-UPS uninterruptible power supply module or a QUINT-BUFFER capacitor module on the same DIN rail segment, confirm that the combined charging and load current does not exceed the 10 A rated output of the new supply.

For systems that include a Profibus DP or PROFINET communication backbone — for example, a Siemens S7-300 or S7-400 PLC rack connected to remote I/O via a Phoenix Contact FL SWITCH industrial Ethernet switch — the power supply replacement should be coordinated with a brief, planned network pause rather than a hot-swap, to avoid spurious diagnostic alarms in the SCADA or DCS historian. Similarly, if the cabinet contains a Phoenix Contact RAD-900 wireless I/O module or a serial RS-485 gateway, confirm that the 24 VDC rail voltage is stable within ±1% before re-enabling communication links.

In I/O expansion scenarios — such as adding Phoenix Contact Axioline F or Inline I/O modules to an existing rack — the QUINT-PS/1AC/24VDC/10 2866763 provides sufficient headroom for moderate expansions. Calculate the additional current draw of each new I/O slice, including digital output modules driving solenoid valves or relay coils, and confirm the total remains below 10 A. For larger expansions, a second QUINT-PS unit with a QUINT-ORING diode module provides redundant, load-sharing power without requiring a larger single supply.

Signal isolation is another consideration in retrofit projects. Where the existing system uses Phoenix Contact MCR signal conditioners or MINI Analog Pro isolators to separate field-level 4–20 mA loops from the PLC I/O bus, ensure these devices are powered from the same regulated 24 VDC rail and that their ground reference is maintained after the power supply swap. A floating ground or a shifted reference voltage can introduce measurement offsets that are difficult to diagnose without a calibrated loop tester.

Downtime Control During System Migration

Minimizing production downtime is the primary concern in any live-system power supply replacement. For the QUINT-PS/1AC/24VDC/10 2866763, the recommended approach is a pre-staged swap: mount the new unit on a temporary DIN rail section, pre-wire all terminals, and perform a bench-level output voltage verification before the scheduled maintenance window. This reduces in-cabinet work time to under 15 minutes in most installations.

Before de-energizing the cabinet, export or photograph the current PLC program version and HMI screen configuration. For Siemens TIA Portal projects connected to an S7-1200 or S7-1500 controller, use the “Upload from device” function to capture the live program state. For older Step 7 Classic projects on S7-300 hardware, save the project to an offline backup. This protects against accidental program loss if the CPU loses its retentive memory during the power interruption — particularly important if the CPU battery is aged or absent.

During the swap, tag and photograph all terminal connections before disconnection. Use a structured re-connection sequence: PE first, then 0V, then +24V output, then AC input. After energizing, verify output voltage at the supply terminals and at the far end of the 24 VDC distribution bus to confirm acceptable voltage drop across the wiring run. Activate the QUINT-PS Static Boost Function (SFB) by briefly shorting the output to confirm that the supply can deliver the high inrush current required to trip downstream miniature circuit breakers — a critical safety verification step before returning the system to production.

For systems with a Phoenix Contact QUINT-UPS or battery buffer module on the same rail, re-commission the UPS module after the main supply is stable, following the manufacturer’s battery conditioning sequence. Document the commissioning date and output voltage setting in the cabinet logbook to support future maintenance cycles and warranty claims.

Retrofit Support FAQ

Q1: Is the QUINT-PS/1AC/24VDC/10 2866763 a direct replacement for earlier QUINT Power revisions?
Yes. The 2866763 is the current production revision of the QUINT-PS/1AC/24VDC/10 and is mechanically and electrically compatible with all prior revisions of this model. Terminal layout, DIN rail footprint, and output characteristics are unchanged, allowing direct substitution without panel modification.

Q2: What commissioning checks are required after installation?
After installation, verify output voltage (nominal 24 VDC, adjustable via front-panel potentiometer), confirm the green OK LED is illuminated, and perform an SFB (Static Boost Function) test by briefly loading the output to confirm high-current delivery capability. Check all downstream devices for normal operation before returning the system to automatic control.

Q3: Can this unit be wired in parallel with another QUINT-PS for redundancy?
Direct parallel connection of two QUINT-PS units is not recommended without a QUINT-ORING diode module, which provides true redundant power sharing and prevents reverse current flow. The QUINT-ORING module mounts on the same DIN rail and requires no additional wiring beyond the standard 24 VDC bus connections.

Q4: What warranty and supply assurance does NINERMAS provide?
Every QUINT-PS/1AC/24VDC/10 2866763 shipped by NINERMAS includes a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions. Units are sourced from authorized supply chains, inspected prior to dispatch, and shipped with full documentation. In-stock units are available for immediate dispatch to minimize your system downtime.