OMRON S8VK-T12024 DIN Rail Power Supply

S8VK: OMRON S8VK series switching power supply

T: Model for three-phase AC400V input

120: Rated power 120W

24: DC24V output

Core Specifications

Terminal Definition

1. L1, L2, L3: Three-phase AC input
2. PE: Protective earth
3. +V, -V: DC24V output
4. V.ADJ: Output voltage trim potentiometer
5. DC ON: Green indicator for normal output

Typical Application Scenarios

Three-phase industrial control cabinets, machine tools, packaging equipment, HVAC automatic control, 380V powered automated production lines, supplying DC24V for PLCs, sensors, relays and valve islands.

In-series Comparison

S8VK-T12024: 120W / 5A / Width 40mm

S8VK-T24024: 240W /10A / Width 60mm

S8VK-T48024: 480W /20A / Width 95mm

S8VK-T96024: 960W /40A

Alternative Selection Reference

1. OMRON single-phase version: S8VK-C12024 (also 120W/24V, single-phase 220V input, do not confuse)
2. Domestic alternatives: Meanwell DRT-120-24, Delta DRP0120, Phoenix Contact three-phase 24V/5A rail power supply

Troubleshooting Guidelines

1. DC indicator off: Check three-phase input voltage, PE earthing, input circuit breaker; failure to start if two phases are missing
2. Voltage drop under load: Load exceeds rated 5A; high-temperature derating; low input voltage
3. Intermittent undervoltage alarm: Main circuit voltage fluctuation, loose terminal wiring
4. Overvoltage latch-off: Triggered by output overvoltage, restore by power cycling; check for load short circuit / reverse voltage

OMRON S8VK-T12024 Detailed Technical Specifications

Three-phase 380V input DIN rail switching power supply, rated 120W DC24V/5A

1. Input Specifications

2. Output Specifications

3. Insulation & Withstand Voltage
4. Input ↔ Output: AC3000V, 1min, cut-off current 20mA
5. Input ↔ PE: AC2500V, 1min, cut-off current 20mA
6. Output ↔ PE: AC1000V, 1min, cut-off current 30mA
7. Insulation Resistance: ≥100MΩ (DC500V, between input/output/PE)
8. Environmental Conditions

5. Mechanical Specifications

Mounting: DIN35mm rail mounting

Dimensions: H125 × W40 × D112.2 mm

Terminals: Screw-type terminals

Weight: Approx. 600g

Optional: Conformal coated PCB version (anti-corrosion & dust-proof)

6. Reliability & Certifications

MTBF: ≥135,000 hours

Indicator: Green DC ON lamp, illuminates when output ≥80~90% rated voltage

Safety Certifications: UL, CSA, CE and other global industrial standards

7. Terminal Definition
8. L1, L2, L3: Three-phase AC input
9. PE: Protective earth (must be earthed reliably)
10. +V, -V: DC24V output
11. V.ADJ: Output voltage trim potentiometer
12. Summary of Protection Functions

✅ Overload protection (auto-recovery)

✅ Short-circuit protection (auto-recovery)

✅ Output overvoltage protection (latch-off, reset by power cycle)

✅ Built-in undervoltage monitoring

✅ Input surge suppression

9. Critical Notes
10. Derating is mandatory when ambient temperature＞50℃
11. Load capacity will be limited under two-phase input
12. External diodes are mandatory for series connection; direct series connection is prohibited
13. PE terminal must be reliably earthed to comply with safety standards

OMRON S8VK-T Three-phase DIN Rail Power Supply Full Series List

S8VK-T: Three-phase AC380~480V input, DC24V output, DIN35 rail mounting, fanless natural cooling; suffix -400 = conformal coated PCB (for dust, moisture and corrosive environments)

Standard Models

Conformal Coated (Anti-corrosion) Models

Accessory List

Common Specifications for Entire S8VK-T Series

1. Input: Three-phase AC380～480V; operating range AC320～576V; two-phase input supported; DC450~810V DC input
2. Output: DC24V, adjustable range 24V±10% (V.ADJ potentiometer)
3. Protection: Overload / short-circuit (auto-recovery), output overvoltage latch-off (reset by power cycle), built-in undervoltage monitoring
4. Environment: Operating temperature -40℃ ~ +70℃, derating required above 50℃; fanless natural cooling; IP20 cabinet use
5. Withstand Voltage: Input↔Output AC3000V 1min; Input↔PE AC2500V 1min; Output↔PE AC1000V 1min
6. Mounting: DIN35 rail, screw terminals; multiple units parallelable for capacity expansion; max. 2 units in series (external diode required)

Quick Selection Tips

All models are single DC24V output. S8VK-T series has no other voltage options (12V/48V not available in T series)

Model without -400: Standard PCB for normal control cabinets; with `-400`: Coated board for dusty, humid and corrosive gas environments

S8VK-T is three-phase power supply, do not confuse with single-phase S8VK-C / S8VK-G

Redundant power supply requires separate S8VK-R redundancy module

OMRON S8VK-T Three-phase DIN Rail Power Supply Cross-Brand Model Comparison Table

Matching prerequisites: Three-phase AC380~480V input, DC24V output, DIN35 rail mount, fanless natural cooling. Grouped into【Premium International Brands】【Taiwan Brands】【Domestic Industrial Brands】; replacement rating marked. ⚠️Differences exist in dimension, terminal layout, BOOST capability and PCB coating. Drawings must be verified for direct replacement.

Conformal Coated Version (-400 Anti-corrosion) Cross Reference

S8VK-Txxx24-400 (PCB conformal coating for dusty/humid/corrosive environments)

1. Phoenix Contact: QUINT4 series Coated version (coating option via suffix)
2. Meanwell TDR: Custom conformal coating available (standard TDR uncoated, custom order required)
3. Siemens: SITOP PSU coated version
4. Domestic: RDW series with three-proof coating

Redundancy Module Cross Reference (S8VK-R10 / S8VK-R20)

Key Difference Notes (Selection Focus)

1. BOOST Peak Capacity

S8VK-T fixed 120% Power Boost for all models; Phoenix QUINT4 has stronger dynamic BOOST for short-time peak loads; Meanwell TDR uses conventional constant current limiting.

2. Input Characteristics

OMRON S8VK-T supports two-phase input. Some competitors’ three-phase power supplies do not support two-phase single-side power supply, verify carefully for retrofit projects.

3. Dimension & Installation

OMRON S8VK-T is compact narrow-width design; Phoenix TRIO and Siemens SITOP models of same power are generally wider. DIN rail mounting space is the most common bottleneck for direct replacement.

4. Protection Logic Difference

S8VK-T overvoltage protection is output latch-off, reset by power cycle. Some competitors adopt hiccup auto-recovery, which may affect control system logic.

5. Temperature Range

OMRON S8VK-T features -40℃ cold start advantage; some Taiwan and domestic brands have lower limit of -30℃, use caution for cold-region equipment.

Selection Recommendation Strategy

Export equipment, high reliability, cold environment: Prefer Phoenix QUINT4 / Siemens SITOP

Cost priority, ordinary domestic automation equipment: Meanwell TDR series

Budget control for domestic projects: Domestic RDW three-phase DIN rail power supply