Omron’s S8VK power supplies are built for industrial reliability
Without stable power, even the most advanced control systems can falter, leading to downtime and production hiccups. This is where Omron’s S8VK series of switch-mode power supplies comes in, offering a lineup designed to meet the demands of industrial applications, such as Programmable Logic Controller (PLC) systems, sensors, servomotors, and safety relays.
The best place to understand the S8VK series is with the S8VK data sheet, which serves as a user manual, troubleshooting guide, and design blueprint all rolled into one. However, to determine which of these to look into, we’ll explore an overview of specifications and details from the various lines in the S8VK family.
| Key S8VK Features | |
| Feature Category | Description / Key Characteristics |
| Efficiency & Power Boost |
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| Environmental Fortitude |
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| Installation & Design |
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| Safety & Compliance |
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Understanding the Omron S8VK Series Through the S8VK Data Sheets
Across the board, you’ll find characteristics such as a compact design and a commitment to easy and fast installation, often facilitated by convenient DIN rail mounting clips. These power supplies are built to withstand harsh environments, boasting wide operating temperature ranges. In many cases, they have specially coated Printed Circuit Boards (PCBs) to resist dust, moisture, and chemical exposure. They’re also typically packed with safety features such as overload and overvoltage protection. The blend of global safety and noise standards, as mentioned above, makes them suitable for worldwide deployment.
Standard and Smart Industrial Power Supplies: S8VK-G & S8VK-S & S8VK-X
The S8VK-G and S8VK-S series anchor the S8VK family, providing a stable DC output for applications such as PLC logic circuits, I/O modules, machine vision systems, and instrumentation. Designed for cabinet mounting, they’re the go-to choice for system integrators and OEMs seeking reliable performance in standard or harsh operating environments. The S8VK-X enhances its functionality with built-in monitoring and communication capabilities, which are discussed in detail below.
About The S8VK-G Series
The S8VK-G series is the general-purpose champion of the family, offering proven reliability and simple integration.
They offer a universal input, handling 100 to 240 VAC (with an allowable range of 85 to 264 VAC) and a DC input from 90 to 350 VDC, simplifying deployment in international equipment builds. The S8VK-G series also features a Power Boost function, capable of supplying 120% of the rated current for short bursts, which is handy for starting inductive loads or handling sudden power surges. Output options vary from 15W to 480W, with common voltages like 5V, 12V, 24V, and 48V.
S8VK-G: compact, reliable power for everyday automation.
S8VK-S Series Capabilities
The S8VK-S series builds on the S8VK-G’s strengths, particularly emphasizing environmental resilience. If your application is exposed to conditions like dust, humidity, or corrosive gases, the S8VK-S, with its PCBs conformally coated with silicone resin, offers even better protection.
This series is also improved by its ease of wiring, thanks to Push-in Plus terminals that simplify connections and reduce installation time. It’s also designed for side-by-side mounting, often up to 55°C, allowing for denser panel layouts. The S8VK-S also includes the Power Boost function, which can deliver 150% more power for higher power models (240W and 480W). Efficiency is high, with some models achieving a typical efficiency of 92% for a 230 VAC input.
S8VK-X Series: For IoT Applications
The S8VK-X series extends the capabilities of Omron’s standard S8VK power supplies by integrating IoT connectivity. Unlike conventional power supplies, it continuously reports key electrical and diagnostic data.
Capabilities include:
- Applicable environments: Suitable for packaging and assembly lines, industrial machine tools, process control systems, and other complex industrial operations.
- Built-in communication protocols: EtherNet/IP and Modbus TCP for remote monitoring.
- Real-time parameter reporting: Output voltage, output current, peak current, internal temperature, and estimated service life.
- Predictive maintenance support: Enables monitoring of performance trends to prevent unexpected downtime.
- Operational diagnostics: Multiple on-board LEDs indicate output voltage health (DC OK), load status, and error conditions for quick visual checks.
Built-in network control with the S8VK-X
| S8VK-G vs S8VK-S vs S8VK-X Key Spec Comparison | |||
| Feature | S8VK-G | S8VK-S | S8VK-X |
| Input Voltage | 100-240 VAC (85-264 VAC allowable), 90-350 VDC | 100-240 VAC (85-264 VAC allowable), 90-350 VDC | 100-240 VAC (85-264 VAC allowable), 90-350 VDC |
| Output Wattage Range | 15W to 480W | 30W to 480W | 30W to 480W |
| Operating Temp. Range | -40 to 70°C | -40 to 70°C | -40 to 70°C |
| Power Boost | 120% | 120% (for 30W-120W), 150% (for 240W-480W) | 120% (up to 120W), 150% (for 240W-480W) |
| Terminal Type | Screw terminals | Push-in Plus terminals | Push-in Plus terminals |
| Communication | – | – | EtherNet/IP, Modbus TCP |
| PCB Coating | Standard | Conformal Coated PCBs | Conformal Coated PCBs |
Three-Phase Power Supplies: S8VK-T & S8VK-WB
When you’re dealing with power needs in the hundreds of watts, for example, 480 W or 960 W, on a three-phase grid, the S8VK-T and S8VK-WB series are built to deliver.
S8VK-T Series Information
The S8VK-T series is purpose-built for applications that demand significant power with a 3-phase input. With power ratings from 120W to a substantial 960W, the S8VK-T is equipped to supply the heavy current needs of large motors, heaters, and other power-hungry industrial components. It’s suited for industrial power grids using 380 to 480 VAC. It can also handle 2-phase input and DC input from 450 to 600 VDC.
Efficiency is a critical concern for high-power units, and the S8VK-T performs well, with 480W and 960W models often including Power Factor Correction (PFC) for reduced input current and increased efficiency, achieving a typical efficiency of up to 93%. It also includes multiple DC output terminals for easier parallel and series operations (though external diodes might be required for series operation), a detail highlighted in the S8VK data sheet.
S8VK-T: heavy-duty three-phase power
About The S8VK-WB Series
Building on the sturdy foundation of the S8VK-T, the S8VK-WB series takes three-phase power supplies a step further with even more compactness and advanced features:
- The S8VK-WB also boasts 5G vibration resistance, allowing it to maintain stable operation in equipment exposed to significant mechanical vibrations, such as conveyors, motors, or mobile machinery.
- Diagnostics are improved with visual status operation indicators, multiple LEDs, and digital outputs for “DC OK” and “I-out > 100%” signals, providing clearer troubleshooting information to minimize downtime.
- The Power Boost functionality is 150%, allowing it to handle significant current surges.
| S8VK-T vs S8VK-WB Key Spec Comparison | ||
| Feature | S8VK-T | S8VK-WB |
| Input Voltage | 3-phase 380-480 VAC (320-576 VAC allowable), 2-phase 380-480 VAC (340-576 VAC allowable), 450-600 VDC | 3-phase 380-480 VAC (340-576 VAC allowable), 2-phase 340-576 VAC, 450-810 VDC (except 960W) |
| Output Wattage Range | 120W to 960W | 240W to 960W |
| Operating Temp. Range | -40 to 70°C | -40 to 70°C |
| Power Boost | 120% | 150% |
| Terminal Type | Screw terminals | Push-in Plus terminals |
| PCB Coating | Standard | Conformal Coated PCBs |
| Efficiency | Up to 93% (480W/960W models) | Over 93% |
| Diagnostics | Output indicator (LED: Green) | Visual status indicators, DC OK/I-out output terminals |
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