XP Power DNR240PS24-I – 240W DIN Rail Power Supply 24VDC/10A | DNR Series Industrial PSU
Engineering Background: The XP Power DNR Series represents a purpose-built family of DIN rail-mount power supplies engineered for the demands of industrial control panels, machine automation, and process instrumentation. Designed to IEC/EN 61010 and UL 508 standards, the DNR240PS24-I delivers stable 24VDC output in environments where power quality directly impacts system uptime and safety.
Product Positioning: The DNR240PS24-I is the 240W flagship of the DNR Series, targeting system integrators and OEM panel builders who require a compact, high-efficiency PSU with wide-range AC input, active PFC, and robust protection circuitry — all within a 75mm-wide DIN rail footprint. It is the preferred choice when load currents up to 10A must be sustained continuously across ambient temperatures from -25°C to +70°C.
Complete Technical Specifications
- Model / SKU: DNR240PS24-I
- Brand: XP Power
- Series: DNR Series
- Output Power: 240W (continuous)
- Output Voltage: 24VDC (adjustable 22–28V)
- Output Current: 10A
- Input Voltage: 85–264VAC, 47–63Hz (universal input)
- Input Current: 4.0A @ 115VAC / 2.0A @ 230VAC
- Power Factor Correction: Active PFC (>0.95 @ full load)
- Efficiency: ≥91% typical @ 230VAC full load
- Ripple & Noise: ≤150mVp-p
- Hold-Up Time: ≥20ms @ 230VAC full load
- Operating Temperature: -25°C to +70°C (derate above 50°C)
- Storage Temperature: -40°C to +85°C
- Humidity: 5–95% RH non-condensing
- Protection: OVP, OCP, OTP, Short Circuit (auto-recovery)
- Isolation: Input–Output 3,000VAC; Input–Ground 1,500VAC
- Mounting: 35mm DIN Rail (EN 60715)
- Dimensions (W×H×D): 75 × 125 × 117mm
- Weight: ~1.0 kg
- IP Rating: IP20
- Cooling: Convection (fanless)
- Certifications: CE, UL 508, cULus, CB, RoHS
- MTBF: >500,000 hours @ 25°C (MIL-HDBK-217F)
Proven Application Environments
- Industrial Automation: PLC power rails in machine control panels (Siemens S7, Allen-Bradley ControlLogix, Mitsubishi MELSEC)
- Process Control: DCS marshalling cabinets, field instrument loops (4–20mA transmitters, solenoid valves)
- Building Automation: BMS controllers, access control systems, HVAC actuator panels
- Transportation & Infrastructure: Railway trackside cabinets, tunnel lighting control, traffic management systems
- Oil & Gas: Safe-area control panels for wellhead monitoring and pipeline SCADA
- Food & Beverage: Washdown-adjacent control enclosures requiring fanless, low-particulate PSUs
- Renewable Energy: Solar inverter auxiliary supplies, wind turbine nacelle control
Engineering Advantages
- Fanless Convection Cooling: Zero moving parts eliminate the primary failure mode in harsh environments; ideal for sealed or low-ventilation enclosures.
- Active PFC (>0.95): Reduces reactive current draw, minimizes harmonic distortion on facility power, and simplifies UPS sizing.
- Wide Input Range (85–264VAC): Single SKU covers global voltage standards — no tap switching required for 110V/230V sites.
- Adjustable Output (22–28VDC): Compensates for long cable runs or specific load requirements without external regulators.
- Parallel Operation: Supports N+1 redundancy configurations with optional redundancy modules.
- Comprehensive Protection Suite: OVP, OCP, OTP, and short-circuit protection with auto-recovery prevent cascade failures in multi-load panels.
- Compact 75mm Width: Maximizes DIN rail density in space-constrained enclosures.
System Architecture & Signal Flow
The DNR240PS24-I employs a two-stage conversion topology: an active PFC front-end rectifies and boosts the universal AC input to a stable ~400VDC bus, followed by an isolated LLC resonant DC-DC stage that converts to regulated 24VDC. Output is monitored by a dedicated supervisory circuit that triggers OVP, OCP, and OTP responses within microseconds. The 24VDC rail feeds downstream loads via terminal blocks (input L/N/PE, output +V/–V/PE), with a parallel-capable architecture allowing a second DNR240PS24-I or a dedicated redundancy module (e.g., XP Power DCR series) to be connected for 1+1 redundancy without additional switchgear.
Sourcing & Quality Verification
- All units sourced directly from XP Power authorized distribution channels or factory-direct inventory.
- Each unit ships with original XP Power packaging, datasheet, and CE/UL declaration of conformity.
- Batch traceability maintained via XP Power serial number and date code records.
- Pre-shipment functional test: output voltage, load regulation, and protection trip verification.
- Konmask.com maintains ISO-aligned incoming inspection records for every DNR240PS24-I unit.
Procurement Process
- Submit RFQ via konmask.com/pages/contact or email support@konmask.com.
- Receive formal quotation with lead time, quantity breaks, and shipping options within 24 business hours.
- Confirm PO — accepted formats: email PO, Alibaba Trade Assurance, T/T, PayPal.
- Units dispatched within 1–3 business days from verified stock; DHL/FedEx/UPS express available.
- Post-delivery technical support provided by Konmask engineering team at no additional charge.
Technical FAQ
Q: Can two DNR240PS24-I units be paralleled for 480W / 20A output?
A: Yes, with XP Power’s recommended redundancy module. Direct paralleling without a decoupling module is not recommended due to potential current-sharing imbalance.
Q: What is the derating curve above 50°C?
A: Output power must be linearly derated from 100% at 50°C to 60% at 70°C. Consult the official XP Power DNR240PS24-I datasheet for the full derating curve.
Q: Is the DNR240PS24-I suitable for 24VDC NAMUR solenoid valve loops?
A: Yes. The stable 24VDC output with ≤150mVp-p ripple meets NAMUR NE 43 signal quality requirements for field device power.
Q: Does this unit carry UL 508 listing for industrial control panels?
A: Yes. The DNR240PS24-I is cULus listed to UL 508 and UL 60950-1, making it suitable for UL-listed panel builds in North American markets.
Q: What is the warranty period?
A: XP Power provides a 3-year manufacturer warranty. Konmask.com extends additional sourcing guarantee — contact us for details.
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