Omron S8VK-C48024 DIN Rail Power Supply – S8VK-C Series

Omron S8VK-C48024: Single-Phase 48W Switch Mode Power Supply for 24 VDC Industrial Control Buses

The Omron S8VK-C48024 is a 48 W, DIN rail-mounted switch mode power supply (SMPS) designed for continuous-duty service in industrial control panels, PLC power distribution architectures, and distributed I/O enclosures. It accepts a universal single-phase AC input of 100–240 VAC at 50/60 Hz and delivers a tightly regulated 24 VDC / 2 A DC output, making it grid-agnostic across North American, European, and Asian installations without hardware reconfiguration.

In a control loop hierarchy, the S8VK-C48024 occupies the primary power conditioning layer — the interface between raw AC mains and the 24 VDC logic rail that energizes PLC CPUs, digital I/O modules, proximity sensors, and solenoid valve coils. Its output regulation holds within ±1% under full load transients, its input filter suppresses conducted EMI back onto the AC bus, and its autonomous protection logic responds to short-circuit, overcurrent, and overvoltage faults without requiring operator intervention. These three characteristics collectively determine the stability and determinism of every downstream control element.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The S8VK-C48024 is built on a flyback converter topology with active power factor correction (PFC) integrated into the primary stage. At the sub-100 W power class, the flyback architecture is the technically correct choice: it achieves galvanic isolation between AC input and DC output through a high-frequency transformer operating in the 65–130 kHz switching band, which physically breaks the common-mode noise coupling path between the AC mains and the 24 VDC logic rail. This isolation is not incidental — it is the primary mechanism that prevents ground-loop interference from corrupting analog sensor signals on 4–20 mA current loops and thermocouple inputs wired into the same panel.

Input EMC Filter Architecture: The AC input stage incorporates a two-stage LC filter: a common-mode choke wound on a high-permeability ferrite core, combined with X2-class and Y2-class capacitors. This network attenuates conducted emissions to EN 55032 Class B limits across the 150 kHz–30 MHz frequency band. In panel environments where variable-frequency drives (VFDs) and servo amplifiers inject substantial high-frequency noise onto the AC bus — typically 50–500 mVrms at switching harmonics — this filter prevents that noise from propagating into the DC distribution rail and triggering spurious transitions on digital I/O modules or corrupting encoder feedback signals.

Secondary Regulation Loop: Output voltage regulation is implemented via an optocoupler feedback path referencing a precision shunt regulator (TL431-class, ±0.5% reference accuracy). The feedback loop bandwidth is tuned to reject load transients with a settling time under 1 ms for a 50% step load change, maintaining output voltage within the ±1% specification band without overshoot that could damage 24 VDC-rated field devices. The front-panel trim potentiometer allows field adjustment of the output rail within ±10% (21.6–26.4 VDC) to compensate for cable voltage drop in long panel wiring runs — a practical requirement in distributed I/O architectures where the PSU may be located 8–15 meters from terminal loads.

Thermal Derating and Component Margin: The convection-cooled aluminum heatsink is bonded directly to the primary switching MOSFET and the secondary rectifier diode — the two highest-dissipation components. Omron’s thermal design targets component junction temperatures at least 15°C below their datasheet maximums at the rated 60°C ambient limit. Above 50°C, the output current must be derated linearly; this conservative margin directly extends MTBF under sustained high-temperature operation in sealed enclosures or tropical climates.

Fault Protection State Machine: Overcurrent protection engages at 105–150% of rated current using a hiccup-mode response: the converter shuts down, holds off for approximately 500 ms, then attempts a soft restart. If the fault condition persists, the cycle repeats indefinitely. This behavior prevents thermal runaway in wiring fault scenarios while enabling automatic recovery when a transient overload clears — eliminating manual reset requirements in unattended remote installations. Short-circuit protection operates continuously on the same auto-recovery basis.

System Integration Benefits

• Stable 24 VDC Rail Under Dynamic Load Steps: ±1% regulation during simultaneous energization of multiple solenoid valves or relay coils prevents voltage sag that would cause PLC CPU undervoltage resets or I/O module communication timeouts on PROFIBUS or DeviceNet segments.
• No Input Tap Selection Required: Universal 100–240 VAC input eliminates the risk of incorrect voltage tap configuration during panel commissioning — a documented failure mode with older transformer-based linear supplies that required manual tap selection.
• EN 55032 Class B EMC Compliance: Ensures the PSU does not degrade the electromagnetic environment within the control enclosure, preserving analog signal integrity on 4–20 mA process loops and thermocouple inputs operating at millivolt signal levels.
• 20 ms Hold-up Time at Full Load: Sustains 24 VDC output through AC mains interruptions up to 20 ms (one full 50 Hz cycle), preventing PLC program execution interruption during momentary grid disturbances in facilities without UPS infrastructure.
• 40 mm DIN Rail Footprint: Compact housing width minimizes horizontal rail consumption in high-density panel layouts. Output terminal blocks accept wire cross-sections up to 2.5 mm² (AWG 14), consistent with standard industrial panel wiring practice.
• Autonomous Fault Recovery: Hiccup-mode OCP and auto-recovery short-circuit protection eliminate manual reset procedures after transient fault events, reducing unplanned downtime in continuous-process and batch manufacturing applications.
• 3,000 VAC Input-Output Isolation: Exceeds the 1,500 VAC minimum required by IEC 62368-1 for industrial equipment, providing a safety margin that accommodates surge events on poorly conditioned AC supplies in heavy industrial environments.
• Green Power-on LED Indicator: Provides immediate visual confirmation of DC output presence without instrumentation, accelerating panel commissioning and fault isolation during scheduled maintenance windows.
• Field-Adjustable Output Voltage: ±10% trim range allows the 24 VDC rail to be set to 25.5–26.0 VDC to compensate for cable drop in long wiring runs, ensuring field devices at the end of the distribution bus receive voltage within their specified operating range.
• RoHS Compliance: Meets EU Directive 2011/65/EU restrictions on hazardous substances, satisfying procurement requirements for CE-marked end products and supporting environmental compliance documentation for OEM customers.

Quality Assurance & Global Logistics

Every Omron S8VK-C48024 unit dispatched from siemensplc.com is sourced through verified Omron distribution channels. Units are supplied in original Omron packaging with intact manufacturer labels, date codes, and serial numbers. No relabeling, repackaging, or modification is performed. Prior to dispatch, output voltage and load regulation are verified under bench test conditions; units that fall outside specification are quarantined and not shipped.

All shipments originate from our warehouse in Xiamen, China — a primary export hub with direct carrier access to DHL Express, FedEx International Priority, UPS Worldwide Express, and TNT Economy Express networks. Standard in-stock lead time is 3–5 business days to most international destinations. Next-flight-out expedited options are available for urgent project timelines. Every shipment includes a complete export documentation package: commercial invoice, packing list, Certificate of Origin (COO), and HS Code 8504.40 classification for customs clearance in the destination country.

• In-stock units dispatched within 1–2 business days of payment confirmation
• Volume pricing available for system integrators and OEM manufacturers (MOQ: 1 unit)
• Export documentation: CI, PL, COO, HS 8504.40 — included with every shipment
• 12-month warranty against manufacturing defects from shipment date
• RFQ response within 4 business hours for standard quantity inquiries
• Partial shipments and split deliveries available for phased project schedules

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.