Technical Specifications

Main Features and Advantages

20 A / 480 W capacity sized for Ovation controller + I/O loads.​ The headline spec of Emerson 1X01047H01L​ is its 24 V DC 20 A continuous rating, which comfortably covers a WFC/WCC controller processor card, the controller’s Ethernet/comms modules, a populated I/O base cluster (drawing from the 24 V DC backplane), and auxiliary cabinet hardware (network switch, fiber media converter, RIO node processor) on a single PSU. Smaller Ovation cabinets (e.g., auxiliary-skids with 1–2 I/O bases) can run on one Emerson 1X01047H01L; larger CCR cabinets run A/B redundant pairs. By contrast, the 5 A / 10 A class PSUs common in process-panel work would collapse under a loaded Ovation backplane—Emerson 1X01047H01L​ is deliberately sized for DCS-class rather than instrument-class load.

Universal AC input eliminates regional SKU split.​ The 100–240 V AC (47–63 Hz) auto-sensing front end means one Emerson 1X01047H01L​ spare covers both 120 V AC North-American MCC feeds and 230 V AC European/Asian cabinet supplies without jumper, voltage-select switch, or hardware change. For EPCs deploying Ovation on a global fleet (e.g., a Japanese OEM turbine with 100 V control feeding an Ovation panel, vs. the same skid sold into Germany at 230 V), the universal input collapses the BOM. The high power-factor (>0.98 at 230 V) also keeps upstream UPS and genset sizing honest.

N+1 redundancy with external redundancy module.​ While the Emerson 1X01047H01L​ itself is a single-unit PSU, it is designed to pair with Emerson’s Ovation external redundancy module (OR module, sits between two PSUs and the 24 V DC bus) to build 1+1 or N+1 redundant arrays. In this topology, two Emerson 1X01047H01L​ units feed the OR module, which does diode-Oring and current sharing; if one PSU trips or is pulled for service, the bus holds within millivolts. This is the standard architecture in turbine-control and BOP drops where an unscheduled DCS-controller reboot costs five-figure ramp losses. Hot-swap extraction/reinsertion is supported—the controller doesn’t see the swap.

Fanless convection design for dirty-panel longevity.​ The Emerson 1X01047H01L​ is convection-cooled through a fine vent grid in the metal housing, with no fan, no bearings, no airflow path that pulls coal-dust or sugar-mill particulate through the PCB. In a 20-year-old coal-plant MCC room where the site’s 2010-vintage panel fans have all been replaced twice, the Emerson 1X01047H01L​ quietly runs on thermal convection alone. The trade-off is derating above ~50–60 °C ambient; Ovation cabinets in turbine bays are typically climate-controlled or forced-ventilated anyway, so the rating matches the envelope.

Cross-platform sparing with DeltaV VE5126.​ Emerson markets the Emerson 1X01047H01L​ as the Ovation-badged equivalent of the DeltaV VE5126 (also 24 V DC / 20 A, DIN rail, redundant-capable). For conglomerate plants that run Ovation on the power island and DeltaV on the process/utility island (common in integrated refinery+power complexes), stocking Emerson 1X01047H01L​ covers both platforms—one spare SKU serves two DCS fleets. This is a deliberate Emerson parts-consolidation play and a win for MRO buyers.

Legacy lifecycle and storeroom strategy.​ Although Emerson continues Ovation support, the Emerson 1X01047H01L​ is a mature SKU with new-surplus allocation tightening as Emerson nudges upgrades toward newer Ovation hardware generations. Generation fleets that standardized on 1X01047-series PSUs in the 2005–2015 window now face the classic spare cliff: the PSU is cheap (~$400–$900 secondary) but a single failure can take a WFC rack offline. Smart MRO holds 1 cold-spare Emerson 1X01047H01L​ per 8–12 deployed units in critical service, plus a matched redundancy-module spare for paired cabinets. For plants mid-retrofit to newer Ovation revisions, the Emerson 1X01047H01L​ also serves as the interim PSU during controller-swap cutovers.

Application Field

The Emerson 1X01047H01L​ deploys wherever an Ovation DCS controller rack or remote I/O drop needs a regulated 24 V DC 20 A feeder—which, given Ovation’s dominance in power generation, means its application map is essentially the global generation fleet plus the heavy-process periphery that adopted Ovation for SCADA-DCS convergence.

In coal-fired units, Emerson 1X01047H01L​ sits in the CCR Ovation cabinet feeding the WFC that supervises boiler master, turbine governor interface, and BOP sequencing; secondary units feed RIO drops in the sootblower local cabinet, the PA/FD/ID fan MCC local panels, and the ash-handling compressor yard. In combined-cycle gas plants, the GT annex local panel (400–800 m from CCR) typically runs an Ovation RIO drop headed by a Emerson 1X01047H01L-fed I/O base, since the 24 V DC feeder must survive the VFD-switching EMI neighborhood of the GT starting converter. In hydro stations, the penstock valve-yard local panels and spillway gatehouses—often unheated—use Emerson 1X01047H01L​ because the -20 °C (and in some firmware/batch -40 °C) low-end rating suits northern-climate outdoor cabinets better than consumer-grade DIN PSUs.

Beyond pure power gen, the Emerson 1X01047H01L​ appears in large water/wastewater treatment​ plants that standardized on Ovation for SCADA-DCS, and in refinery/chemical utility islands​ (boiler house, cooling tower, demineralizer) where the main process DCS may be Honeywell TDC/Experion or Yokogawa CS, but the utility island was subcontracted on Ovation. Nuclear auxiliary systems​ (BOP, radwaste, CVCS skid) also run Ovation in many fleets, with Emerson 1X01047H01L​ as the PSU of record.

Retrofit and service context is equally material. Many Ovation installs from the Westinghouse-era (late 1990s) through the 2010s are now 15–25 years old; when a Emerson 1X01047H01L​ in a WFC cabinet drifts (capacitor aging → ripple rise → controller NMI) or fails post-lightning-event on the AC feed, the plant has three paths: air-freight a surplus unit, re-wire the cabinet to a modern third-party DIN PSU (requires Emerson deviation and re-validation), or full DCS hardware refresh (multi-million). The middle path—cold-spare Emerson 1X01047H01L​ on the storeroom rack—is what most fleet managers chose, sustaining secondary-market demand for tested-pull units with traceable plant origin and capacitor-health verification.