Article tools sponsored by

Compact power supply boosts lifetime, efficiency

by Rick DeMeis, Senior Technical Editor -- Design News, November 5, 2001

WAGO's 2A, 24V dc power supply (output power of 48W) is the latest addition to its range of DIN-rail mountable switch mode power supplies (including 5A (120W) and 10A (240W) versions). With a universal voltage range of 85 to 264V ac and an efficient input filter, the supply can connect to most voltage sources. The output is electronically protected against shorting and features automatic restart. Efficiency is 85%.

Device ambient temperatures range from -25 to 50C without derating, even in the compact package (38 x 90 x 108 mm) geared for standard industrial applications.

"The technology keys to the supply were being able to package modern switching technology in a cost-effective package which has a cage-clamp terminal block for a high-reliability connection," according to Charles Cook, WAGO technical product manager. "We were able to package and cool the electronics in a molded housing that can be produced in high volume to cut manufacturing cost."

Cook also cites a mean time between failure of about 400,000 hours. To achieve that number, he notes WAGO engineers provided many holes in the housing to allow convective cooling. Within the housing, the designers placed the capacitors, traditionally an Achilles heel, at the bottom of the supply where the air enters in order to keep them the coolest. The heat producing switching transistors and inductors are at the top to facilitate drawing air through the housing.

The power supplies meet UL 1950, CAN/CSA C 22.2 No. 950-95, and IEC/EN 60 950.

Additional Details...WAGO Corp., N120 W19129 Freistadt Rd., Box 1015, Germantown, WI 53022; Tel: (800) DIN-RAIL; www.wago.com , or Enter 594.

related stories
resource center
by this author

View more articles by Richard DeMeis

Technology Marketplace

Article tools sponsored by

Talkback

We would love your feedback!

» View All Talkback Threads

DN's Resource Center Get Free Information, Made Easy

Quiet Strength Under Load
Groschopp | Case Study
Request Item
Patient Lift Sound Data
Groschopp | Case Study
Request Item

View all DN resources >>

Design News Partner Zones

JUNE 24TH WEBCAST: Collaborative Requirements Engineering
Speed your innovation. Capture the "voice of the customer" and translate customer requests into user requirements that define new products. Find out why the new ENOVIA Requirements Management solution enables organizations to improve their overall global requirements management process. Read More

Light Matters: Systems Level Approach to HBLED illumination applications
Its good practice to apply a systems-level approach to high-brightness LED (HBLED) illumination applications. Minimally, the system includes the optical, thermal and electrical characteristics of the of the HBLED, the lens (if any) which is built-in to its package, secondary optics such as external plastic lenses/reflectors to direct the light as your application requires and power driver electronics. Read More

Design Engineers' Portal for Sensing and Machine Safety
Whatever industry you're in, or whatever product you manufacture, the right sensors to automate your plant, and to improve your overall efficiency, quality and safety are a must. You'll find Banner Engineering to be an amazing resource of products, training and people with expertise.