Martek PS2494-YE – 24VDC 94W Rugged DIN Rail Power Supply for Industrial Control Panels_其他OTHERS_Manufactures_Shenzhen Silk Road XY Technology Co., Ltd

Description

The Martek PS2494-YE is a high-performance, isolated DC/DC power supply engineered for mission-critical industrial applications where reliability under extreme conditions is non-negotiable. Originally developed by Martek Corporation—a leader in rugged power electronics later integrated into Emerson Automation Solutions—the Martek PS2494-YE delivers a tightly regulated 24VDC output at 3.9 amperes (94 watts continuous) from a broad 18–36VDC input range. This wide input tolerance makes it exceptionally well-suited for battery-powered or fluctuating DC systems, such as those found in rail vehicles, remote telemetry units (RTUs), and mobile machinery.

As a member of the PS2400 series, the Martek PS2494-YE features a fanless, convection-cooled design with no moving parts, ensuring silent and maintenance-free operation even in dusty, humid, or high-vibration environments. Its compact form factor supports standard DIN rail mounting, enabling easy integration into existing control panels alongside PLCs, relays, and I/O modules from brands like Rockwell, Emerson, and GE. With robust built-in protections—including short-circuit, overcurrent, overvoltage, and thermal shutdown—the Martek PS2494-YE not only safeguards itself but also enhances the resilience of the entire control system it powers. Decades after its initial release, this module remains a cornerstone in legacy automation infrastructure, where direct replacement is often preferred over costly system redesigns.

Technical Specifications

Parameter Name	Parameter Value
Product Model	Martek PS2494-YE
Manufacturer	Martek Corporation (now part of Emerson Automation Solutions)
Product Type	Isolated DC/DC power supply module
Input Voltage Range	18–36 VDC (nominal 24 VDC)
Output Voltage / Current	24 VDC ±2% / 3.9 A (94 W continuous)
Efficiency	≥85% at full load
Output Ripple & Noise	<50>
Protections	Short-circuit, overcurrent, overvoltage, thermal shutdown with auto-recovery
Operating Temperature	–40°C to +85°C (derating required above +70°C)
Mounting Method	DIN rail (compatible with TS-35/7.5 and TS-35/15 rails)
Cooling Method	Natural convection (fanless)
Certifications	CE marked, UL Recognized (File E146789), RoHS compliant

Main Features and Advantages

Exceptional environmental resilience: The Martek PS2494-YE operates reliably across an industrial-grade temperature range of –40°C to +85°C, making it suitable for Arctic pipelines, desert mining sites, and engine compartments. Its conformal-coated PCB (in select variants) and sealed construction resist moisture, salt spray, and conductive dust—common failure points in lesser power supplies.

Wide input voltage compatibility: Unlike fixed-range supplies, the Martek PS2494-YE maintains stable output even when input sags to 18V (e.g., during battery discharge) or surges to 36V (e.g., during regenerative braking in rail systems). This eliminates the need for additional voltage regulation stages in unstable DC networks.

Ultra-low electrical noise: With output ripple held below 50 mV peak-to-peak, the Martek PS2494-YE prevents interference with sensitive analog sensors, communication interfaces (e.g., Modbus, Profibus), and safety relays—ensuring signal integrity in mixed-signal control panels.

Maintenance-free and long-life design: The absence of fans or electrolytic capacitors prone to rapid aging (in high-temp versions) contributes to a mean time between failures (MTBF) exceeding 100,000 hours. The Martek PS2494-YE’s auto-recovery protection allows it to resume normal operation immediately after transient faults clear—minimizing unplanned downtime.

Legacy integration without compromise: Despite being a discontinued product, the Martek PS2494-YE meets modern safety and environmental standards (RoHS, CE), allowing continued deployment in upgraded systems. Its standardized footprint and terminal layout simplify drop-in replacement in panels originally designed decades ago.

Application Field

In North American commuter rail fleets, the Martek PS2494-YE powers door control logic, HVAC interfaces, and communication gateways where input voltage varies with train speed and battery state. Its vibration resistance and wide input range ensure uninterrupted service across daily operational cycles.

On offshore drilling rigs in the North Sea, the Martek PS2494-YE supplies clean 24VDC to Emerson ROC800 RTUs monitoring wellhead pressure and emergency shutdown valves. The fanless design prevents salt corrosion, while –40°C cold-start capability ensures functionality during winter storms.

Within legacy Westinghouse turbine control panels at combined-cycle power plants, the Martek PS2494-YE provides isolated power to relay racks and analog output cards. When failures occur, plant engineers prioritize sourcing an authentic Martek PS2494-YE to avoid revalidation of safety-critical circuits—a process that could take weeks and cost hundreds of thousands in lost generation.

Installation and Maintenance

Pre-installation preparation: Before installing the Martek PS2494-YE, confirm that the DC source voltage stays within the 18–36VDC range under all operating conditions. Install appropriate upstream fusing per local electrical codes. Ensure correct polarity at the screw terminals—reverse polarity will permanently damage the module. Mount the unit on a standard TS-35 DIN rail with at least 25 mm of clearance above and below to allow natural convection cooling, especially in enclosed cabinets.

Maintenance recommendations: The Martek PS2494-YE requires no scheduled maintenance but should be inspected annually during plant outages. Check for loose terminals, discoloration, or signs of overheating. Measure output voltage under load to verify regulation. If ripple exceeds 50 mV or efficiency drops significantly, replace the unit—internal components degrade over time despite the fanless design. Store spare Martek PS2494-YE modules in dry, climate-controlled environments (10–30°C,<60>

Martek PS2494-YE – 24VDC 94W Rugged DIN Rail Power Supply for Industrial Control Panels