Introduction
Thank you for purchasing the OMRON S8VS-48024-. This Instruction Manual describes the functions, performance, and application methods required to use the S8VS-48024-.
Please ensure that a specialist with electrical knowledge operates the S8VS-48024-.
Read and understand this Instruction Manual before use. Keep this manual handy for reference.
When using S8VS-48024A- or S8VS-48024B-, also read the 'S8VS Operation Manual'.
Safety Precautions
General Warnings
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage.
- Do not disassemble, modify, or repair the product. Do not touch the interior. (Risk of electric shock, fire, product failure)
- Do not touch the product while power is supplied or immediately after power is turned off. (Risk of minor burns)
- Tighten terminal screws to the specified torque (1.08 N•m). (Risk of fire)
- Do not touch terminals while power is supplied. Always close the terminal cover after wiring. (Risk of minor electric shock injury)
- Prevent metal pieces, conductors, wire scraps, or cuttings from entering the product. (Risk of electric shock, fire, product failure)
- Internal working voltage can be up to 370V, and this voltage may remain for up to 30 seconds after power is switched off.
Installation and Storage Environment Precautions
- Store the product in an ambient temperature of –25 to +65°C and relative humidity of 25 to 90%.
- For extended storage (over three months, only for S8VS-48024A-), store at –25 to +30°C and 25 to 70% RH.
- Avoid adverse heat radiation due to mounting status; use standard mounting direction. Incorrect mounting may cause internal parts to deteriorate or fail, and the maintenance forecast monitor function may not work correctly.
- Do not use the product if internal parts are deteriorated or broken, or if operating beyond derating curves (refer to derating curve diagrams).
- Use the product where relative humidity is 25 to 85%.
- Avoid places exposed to direct sunlight.
- Avoid places exposed to liquid penetration, foreign substances, or corrosive gas.
- Avoid places subject to shock or vibration. Keep the power supply as far as possible from vibration sources.
- If vibration or impact is expected, use a metal DIN rail to prevent metallic filings from abrasion.
- If used in areas with excessive electronic noise, keep the power supply as far as possible from noise sources.
- Do not loosen screws on the main body's side face, as this can cause internal part deterioration from heat radiation.
Wiring Precautions
- Connect the ground completely using the specified protective earthing terminal. Failure to do so may cause electric shock or malfunction.
- Ensure input and output terminals are wired correctly. Incorrect wiring may cause ignition.
- Use appropriate wire types and torque for terminals:
- Input Terminal: AWG14 to 16 (1.309 to 2.081 mm²), torque 1.08 N•m (9.6 in. lb.).
- Output Terminal: AWG14 (2.081 mm²), torque 1.08 N•m (9.6 in. lb.).
- Alarm Output Terminal: AWG18 to 28 (0.081 to 0.823 mm²).
- Use copper stranded or solid wires rated for a minimum of 60°C or 60/75°C.
- Output terminals are rated for 10A per terminal. Use two or more terminals for currents exceeding this rating.
- Provide a maximum 15A overcurrent protection on each positive output wire.
- Do not apply more than 100N force to the terminal block when tightening.
- Remove any protective sheet from the product before power-on.
- (For S8VS-48024-F models): Do not insert more than one wire per terminal. Use the tool insertion hole to insert or remove I/O wires, ensuring a secure connection. Never insert a wire into the tool insertion hole.
Nomenclature
The power supply unit features the following components:
- AC Input Terminal: (Fuse located on the (L) side)
- Protective Earthing Terminal: ( )
- DC Output Terminal: (–V), (+V)
- Output Indicator: (DC ON: green light)
- Output Voltage Adjuster: (V.ADJ) - Potentiometer for voltage adjustment.
- Main Display Unit
- Operation Display Unit
- Control Keys: Mode Key, Up Key, Down Key
- Alarm Output Terminal
- Undervoltage Alarm Output Terminal (DC LOW): (emitter/collector) (for S8VS-48024A- models)
- Maintenance Forecast Monitor Terminal (Yrs): (emitter/collector) (for S8VS-48024B- models)
- Total Run Time Monitor Terminal (kh): (emitter/collector)
- No connect terminals
Safety Standards and Ratings
- Conforms to UL62368-1, EN62368-1, CSA C22.2 No. 62368-1.
- Overvoltage Category: III (input to output), II (input to ground).
- Protection Class: I.
- Climatic Class: 3K3.
- Use in pollution degree 2 environments.
Precautions for Correct Use
Mounting
- Mounting Direction: Standard vertical mounting is recommended. Avoid mounting in orientations that impede heat dissipation. (Diagrams show valid/invalid mounting positions).
- Mounting Space: Ensure adequate clearance for natural air circulation: 75mm or more above and below, and 20mm or more on the sides.
Derating Curve
A derating curve (Fig.5) illustrates the relationship between load percentage and ambient air temperature. Use this curve to determine allowable load when mounting space is reduced or ambient temperatures are high. For example, if mounting space is reduced by 5mm below the recommended 75mm, the allowable temperature may need to be reduced by 1°C.
Input Voltage Tolerance
The power supply accepts a universal input voltage range of 85 to 264 VAC.
Parallel Operation
This product is not designed for parallel operation.
Output Voltage Adjustment
- Default Setting: Output voltage is set to the rated voltage at the factory.
- Adjustable Range: The output voltage can be adjusted from –10% to +15% of the rated output voltage using the V.ADJ potentiometer on the front panel. Turning clockwise increases voltage; counterclockwise decreases it.
- Notes:
- Adjusting the output voltage below 20V may activate the undervoltage alarm function (for S8VS-48024A-/B- models).
- Do not exceed the rated output capacity and current after adjusting the output voltage.
- Be cautious, as the output voltage may exceed the allowable range during adjustment. Always check the output voltage and ensure the connected load is not damaged.
Electrical Tests
- Dielectric Strength Test: 3000 VAC for 1 minute between input and output terminals. Ensure all output and alarm terminals are short-circuited during the test. Increase/decrease test voltage gradually.
- Insulation Resistance Test: Use a 500 VDC ohmmeter. Ensure all output and alarm terminals are short-circuited during the test.
Protection Features
- Overload Protection: The load and power supply are automatically protected from overcurrent damage. Protection resets when the output current returns to the rated range. Continuous operation under overload or short-circuit may damage internal components.
- Overvoltage Protection: The power supply and load are protected from overvoltage. Protection activates if the output voltage exceeds approximately 130% of the rated value. To reset, turn the power supply off for more than 3 minutes, then turn it back on. Always clear the cause of overvoltage before resetting.
Alarm Output
- (Only for S8VS-48024A-/B- models)
- Type: Transistor Output
- Specifications: 30 VDC max., 50 mA max.
- Residual voltage on power-on: ≤ 2 V.
- Leakage current on shutoff: ≤ 0.1 mA.
- For undervoltage alarm, maintenance forecast monitor, and total run time monitor functions, refer to the 'S8VS Operation Manual'.
Troubleshooting: No Output Voltage
If there is no output voltage, check the following:
- Overload Status: Verify that the load is not in an overload condition or short-circuited. Disconnect load wiring for testing.
- Overvoltage/Latching Protection: Attempt to clear protection by turning the power supply off for at least 3 minutes, then turning it back on.
- If the issue persists, consult the OMRON service manual or contact support.
Conformance to EU Directives
Warning: This is a Class A product. In residential, commercial, or light industrial environments, it may cause radio interference. This product is not intended for residential use. In commercial or light industrial environments connected to the public mains supply, users may need to take measures to reduce interference.
Wiring to Alarm Output Terminal
Use the button in the center of the terminal block to insert or remove wires. After insertion, gently pull the wire to ensure it is securely fastened.
