I. High-temperature-resistant structural design for industrial PLCs (durable, anti-interference, and easy integration)

　　1. Industrial-grade protection and high-temperature-resistant materials

　　High-strength, high-temperature-resistant housing:

　　Made of UL94 V-0 flame-retardant cast aluminum and ABS composite material (3mm wall thickness, 1mm thicker than the home adapter), it offers high-temperature resistance from -20°C to 70°C (suitable for use near high-temperature equipment in industrial workshops and in enclosed control cabinets in summer). It shows no signs of embrittlement or deformation after 5000 hours of high-temperature aging testing. The surface is sprayed with an antistatic and anti-corrosion coating (impedance 10⁶-10⁹Ω) to resist dust absorption and oil corrosion in the workplace, achieving an IP42 protection rating (dust and oil splash protection). Enhanced Heat Dissipation Structure:

　　A built-in 15cm² aluminum comb-shaped heat sink (40% higher heat dissipation efficiency than a flat heat sink) is featured. The linear adjustment tube (industrial-grade LM7824) is directly bonded to the heat sink. Combined with natural convection in the control cabinet, the case temperature remains ≤55°C (ambient temperature 40°C) at full load at 24V/1A. The fanless design prevents dust from clogging the air duct, making it suitable for industrial dusty environments.

　　2. PLC Control Cabinet Installation Compatibility

　　Industrial Standard Installation:

　　Supports dual modes: 35mm DIN rail mounting (compatible with 90% of industrial control cabinet rails) and panel flush mounting (75×45mm cutout). The mounting clips are made of rust-resistant stainless steel with a clamping force of ≥80N. Vibration resistance meets IEC 60068-2-6 standards (10-500Hz, 5g acceleration), preventing the adapter from shifting due to workplace vibrations. Industrial-grade interface design:

　　The input uses a locking AC receptacle (compatible with 100-240V AC industrial plugs and vibration-resistant), and the output uses Phoenix terminals (5.08mm pitch, supporting 2.5mm² wire crimping), compatible with PLC control cabinet wiring standards. Both input and output cables support a wire diameter of 10mm or greater, meeting industrial high-current transmission requirements and preventing voltage drops caused by line loss. II. Core Performance (Industrial-Grade Stable Power Supply + High-Temperature Reliability)

　　1. Wide-Voltage Input and Precise Output (Suitable for PLC Power Supply Requirements)

　　Wide-Voltage Input and Power Specifications:

　　The input is compatible with 100-240V AC (50/60Hz), compatible with global industrial power grids (e.g., 220V in China and 110V in Europe and the United States), without the need for adapter replacement. The output is 24V DC constant voltage + 1A constant current (rated power 24W), with a voltage accuracy of ±1% (output fluctuation ≤0.24V when the load varies from 0.2A to 1A). This fully meets the power supply needs of small industrial PLCs (such as the Siemens S7-200 SMART and Mitsubishi FX3U) and expansion modules (most PLC host power ≤20W).

　　Low ripple ensures stable PLC logic:

　　The four-stage filtering (electrolytic capacitors + ceramic capacitors + inductors + LDO secondary voltage regulation) design ensures output ripple ≤ 5mVp-p (far below the PLC's required upper limit of 10mVp-p), preventing ripple interference with the PLC's digital/analog signal acquisition (for example, preventing data drift in analog input modules). The ripple rejection ratio is ≥ 70dB (at 50Hz/60Hz operating frequency). This ensures clean power supply even near strong interference sources such as inverters and motors, ensuring accurate triggering of PLC logic commands. 2. High-Temperature-Resistant and Industrial-Grade Components

　　High-Temperature-Resistant Component Selection:

　　Core components are industrial-grade, high-temperature-resistant models: 125°C long-life electrolytic capacitors (lifespan ≥8000 hours, twice that of household capacitors), metal film resistors with a -55°C to 150°C temperature range, and an industrial-grade three-terminal voltage regulator (LM7824IT, temperature range -40°C to 125°C). Even at full load in a 70°C environment, output parameter drift is ≤2%, with no issues of capacitor bulging or resistor burnout.

　　High-Temperature Protection Mechanism:

　　Built-in dual temperature detection (heat sink temperature + voltage regulator temperature) triggers overheat protection (cutting off output current to 0.3A) when the temperature is ≥85°C. Output automatically resumes when the temperature drops to 65°C. High-temperature-resistant wire (105°C temperature resistance, wire diameter 0.75mm²) prevents cable insulation aging and cracking at high temperatures, which could lead to short circuits. 3. Industrial-grade Protection and Anti-interference

　　Four-fold safety protection (suitable for unattended operation):

　　Short-circuit protection: When the output is short-circuited, the current is limited to ≤1.5A within 10ms and automatically recovers after the fault is resolved (no manual reset is required, preventing unexpected PLC power outages and restarts).

　　Overvoltage protection: Automatically limits the output voltage when the output voltage is ≥26.4V to prevent breakdown of the PLC motherboard power chip.

　　Overcurrent protection: Gradually reduces the output when the load current is ≥1.1A to prevent overload caused by excessive PLC expansion modules.

　　Reverse polarity protection: No current is output when the output polarity is reversed, protecting the PLC interface from damage. Industrial Electromagnetic Compatibility (Immunity):

　　Complies with EN 55022 Class A industrial electromagnetic compatibility standards (radiated interference ≤ 46dBμV/m, conducted interference ≤ 60dBμV), and has passed CE (EN 61000-6-2/4) and UL 60950-1 industrial safety certifications. A common-mode inductor in series with the input circuit and a varistor in parallel with the output provide protection against lightning strikes and surge interference (withstands 2kV transient voltage), ensuring stable operation of the PLC in complex electromagnetic environments. III. Industrial PLC Application Scenario (Host + Expansion + Peripheral)

　　1. Core Scenario: Industrial PLC Host Power Supply

　　Small PLC Host (such as the S7-200 SMART):

　　Provides a stable 24V power supply to the PLC host, suitable for DIN rail mounting within the control cabinet (side-by-side with the PLC to save space). Low-ripple output ensures interference-free operation of the PLC's CPU logic operations. In actual measurements, the PLC's switching output response delay fluctuation was ≤0.1ms after 72 hours of continuous operation, eliminating program errors caused by unstable power supply.

　　PLC Expansion Module (such as digital input/output module):

　　A single adapter can power one PLC host and two expansion modules (total power ≤24W). Power is distributed via Phoenix terminal blocks, eliminating the need for a separate adapter for each module. The 24V output is compatible with the PLC's 24V sensor power supply, simplifying wiring within the control cabinet (using a shared power supply). 2. Extended Application: Powering PLC Peripheral Devices

　　Low-Power Industrial Sensors:

　　Compatible with low-power PLC-controlled peripherals such as 24V photoelectric sensors (power ≤ 1W) and proximity switches (power ≤ 0.5W). A single adapter can simultaneously power a PLC and four sensors, eliminating the need for an additional sensor power supply and reducing equipment costs. Its high-temperature resistance makes it suitable for sensors installed near high-temperature equipment (such as ovens).

　　PLC Programming/Debugging Assistance:

　　When debugging a PLC while away from home, the 100-240V wide-voltage input adapts to on-site mains power (e.g., 220V in a factory or 110V on a construction site) to provide temporary power to the PLC. When used with a portable programmer, this eliminates the need for on-site control cabinet power, increasing debugging flexibility. IV. Maintenance and Industrial-Grade Assurance

　　1. Low-Maintenance Design (Suitable for Industrial Scenarios)

　　Status Visualization and Troubleshooting:

　　Equipped with a dual-color LED indicator (green = normal output, red = fault/protection), the power supply status can be quickly determined from outside the control cabinet. The housing clearly displays input and output parameters and a wiring diagram to prevent miswiring by maintenance personnel. With no wearing parts (no fans, no relays), the heat sink only requires quarterly dust cleaning (compressed air purge), minimizing annual maintenance costs.

　　Long Life and Durability:

　　MTBF (Mean Time Between Failures) is ≥60,000 hours at full load, equivalent to over seven years of stable operation in 24/7 industrial scenarios. High-temperature-resistant components and an enhanced heat dissipation design extend the adapter's lifespan in high-temperature workshops by three times that of standard adapters. 2. Industrial Certifications and After-Sales Support

　　Global Industrial Compliance:

　　This product is certified for CE (Industrial Electromagnetic Compatibility + Safety), UL 60950-1 (North American Industrial Safety), and CQC (China Quality Certification), and complies with RoHS 2.0 environmental standards. Creepage distances ≥ 6mm and clearances ≥ 5mm meet the IEC 61131-2 industrial PLC power supply safety requirements, making it suitable for direct use in domestic and international industrial projects.

　　Industrial-Grade After-Sales Service:

　　This product comes with a 3-year full-unit warranty (including free replacement for damage caused by high-temperature aging or short circuits), 24/7 dedicated customer service for industrial equipment (supporting remote troubleshooting of PLC power supply faults), and supports bulk customization (such as extending the output cable to 5 meters, project number imprinting, and custom DIN rail clips), meeting the purchasing needs of automation integrators and PLC manufacturers.

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