OMRON S82G-1024 Switch Mode Power Supply – S82G Series

OMRON S82G-1024: 240W DIN-Rail Power Supply for Industrial Control Architectures

The S82G-1024 is a 24 VDC / 10 A switch mode power supply (SMPS) from OMRON’s S82G platform, rated at 240 W continuous output. It is designed to serve as the primary DC bus source in PLC control panels, distributed I/O enclosures, safety relay systems, and process instrumentation loops. The unit accepts a wide-range AC input of 100–240 VAC at 50/60 Hz without manual voltage selection, making it deployable across North American, European, and Asian grid standards from a single SKU. Its fanless convection-cooled thermal design eliminates rotating components, directly reducing scheduled maintenance intervals in sealed or particulate-laden enclosures.

The S82G-1024 carries UL 508 (industrial control equipment), CE (LVD Directive 2014/35/EU and EMC Directive 2014/30/EU), and cULus dual certification, satisfying panel builder compliance requirements for both North American NEC-based installations and European CE-marked machinery. MTBF is rated at >300,000 hours per MIL-HDBK-217F ground benign conditions, supporting 24/7 continuous duty cycle deployments without scheduled replacement windows.

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

Technical Parameters

Hardware Logical Analysis

The S82G-1024 is built on a single-ended forward converter topology operating at a switching frequency of approximately 100 kHz. At this frequency, the transformer core volume is reduced by roughly two orders of magnitude compared to a 50 Hz line-frequency design, enabling the compact 55 mm DIN-rail width. The AC input stage incorporates an active power factor correction (PFC) boost pre-regulator, which shapes the input current waveform to near-sinusoidal form, achieving a power factor ≥ 0.95 and complying with EN 61000-3-2 Class A harmonic current limits — a requirement increasingly enforced in European industrial installations.

The high-frequency transformer provides galvanic isolation rated at 3,000 VAC between primary and secondary, with a separate 2,000 VAC rating from primary to functional ground (FG). This dual-barrier isolation architecture is critical in control panels where the 24 VDC bus must remain floating relative to chassis ground to prevent ground-loop interference in 4–20 mA analog signal circuits.

EMC Design: The input filter stage employs a two-stage common-mode choke plus X/Y capacitor network, attenuating conducted emissions to EN 55011 Class B limits. The PCB layout uses a split ground plane strategy — separating high-frequency switching nodes from the output DC return — to minimize radiated emissions from the secondary side. Surge immunity is validated to EN 61000-4-5 Level 3 (2 kV line-to-line, 4 kV line-to-earth), covering the transient environment of industrial switchgear panels.

Protection Logic: Overcurrent protection operates in hiccup mode at 105–150% of rated current: the controller detects the overcurrent condition, shuts down the switching stage, waits a fixed off-time (~500 ms), then attempts restart. This cycle repeats until the overload is cleared, preventing thermal runaway without requiring manual intervention. Overvoltage protection uses a latch-off mechanism triggered at 28–34 VDC on the output bus, requiring a manual power cycle to reset — a deliberate design choice that prevents automatic restart into a potentially damaged load circuit.

Thermal Management: The fanless convection design relies on the aluminum extrusion heatsink integrated into the housing. The thermal derating curve is linear: at ambient temperatures above 50°C, output current must be reduced at a rate of approximately 0.4 A/°C. At 60°C ambient, maximum permissible output is 6 A (144 W). Panel designers should account for this derating when sizing the PSU for high-ambient enclosures, particularly in tropical climates or near heat-generating drives.

System Integration Benefits

• Deterministic DC Bus Stability: ±1% combined line and load regulation ensures that voltage excursions on the 24 VDC bus remain within the operating tolerance of OMRON CJ2, NX, and NJ series CPU modules (rated 20.4–28.8 VDC), preventing nuisance resets during load transients from solenoid switching or motor starter inrush.
• DC OK Relay for PLC Health Monitoring: The configurable DC OK relay contact can be wired to a PLC digital input, enabling the control program to detect PSU undervoltage conditions and execute a controlled shutdown sequence before logic power collapses — a key requirement in safety-instrumented systems (SIS) with defined safe-state logic.
• N+1 Redundancy via Diode OR-ing: Two S82G-1024 units connected through an external Schottky diode OR-ing module (e.g., OMRON S82V-ORG) provide N+1 redundant 24 VDC supply. The forward voltage drop of the Schottky diodes (~0.3–0.5 V) must be compensated by trimming the output voltage of each PSU to 24.5 VDC using the onboard adjustment potentiometer.
• Wide-Range Input Eliminates Inventory Fragmentation: A single S82G-1024 SKU covers 100–240 VAC input, eliminating the need to stock separate 110 V and 230 V variants for multi-region OEM panel production. This reduces BOM complexity and warehouse SKU count.
• Fanless Design Extends MTBF in Contaminated Environments: Eliminating the fan removes the single highest-failure-rate mechanical component in a PSU. In environments with airborne particulates (woodworking, cement, grain processing), fanless operation prevents filter clogging and bearing wear, extending mean time between maintenance interventions.
• Compact 55 mm Width Optimizes Panel Real Estate: At 55 mm DIN-rail width, the S82G-1024 occupies less horizontal space than competing 240 W units in the 60–70 mm range, freeing rail space for additional terminal blocks, circuit breakers, or I/O modules in constrained enclosures.
• High Isolation Voltage Supports Floating 24 VDC Architectures: The 3,000 VAC input-to-output isolation allows the 24 VDC bus to be operated as a fully floating supply, isolating analog signal commons from chassis ground and eliminating ground-loop errors in thermocouple, RTD, and 4–20 mA measurement circuits.
• EN 61000-4 Full Immunity Suite: Validated immunity to ESD (Level 3), radiated RF (Level 3), electrical fast transient/burst (Level 4), surge (Level 3), and conducted RF (Level 3) ensures stable operation in the electromagnetic environment of motor control centers (MCCs), variable frequency drives (VFDs), and high-current bus systems without additional external filtering.

Quality Assurance & Global Logistics

Every S82G-1024 unit supplied by siemensplc.com is sourced through verified OMRON distribution channels. Incoming inspection includes output voltage verification under rated load, ripple measurement, label and date-code authentication against OMRON’s genuine product database, and holographic seal integrity check. Units failing any inspection criterion are quarantined and returned — no reworked or refurbished units enter the dispatch inventory.

Packaging & Handling: Units are shipped in original OMRON retail packaging with anti-static inner wrap, foam corner protection, and a desiccant sachet for humidity control during ocean freight. Each shipment includes the OMRON product datasheet, CE Declaration of Conformity, and UL certificate of compliance upon request.

Logistics from Xiamen, China: Our warehouse is located in Xiamen, Fujian Province — a major international port city with direct access to DHL Express, FedEx International Priority, UPS Worldwide Express, and SF Express international services. Typical transit times: 2–4 business days to Southeast Asia, 3–5 days to Europe, 4–6 days to North America. EXW Xiamen and CIF destination Incoterms are both available. For urgent requirements, same-day dispatch is available for orders confirmed before 14:00 CST. All export documentation — commercial invoice, packing list, certificate of origin — is prepared in compliance with destination country customs requirements. HS Code 8504.40 applies for customs classification of switch mode power supplies.

Warranty: 12-month warranty from shipment date against manufacturing defects. Warranty claims are processed within 5 business days of receipt of the defective unit. Replacement units are dispatched from Xiamen stock; no advance replacement fee is required for verified warranty cases.

Contact Information

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