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VOLUME -23 NUMBER 3
Publication Date: 03/1/2008
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Electronic Mfg. Services
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Special Feature: PCB and Assembly
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March 2008 Issue
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Schaefer Intros Converter/Charger Modules
Ashland, MA — Schaefer, Inc. is introducing the C/B 2700 Series of 3U DC/DC and AC/DC converter modules and battery chargers. The C/B 2700's robust design uses industrial grade components and provides a high density, space-saving solution for applications in industries such as railway controls and communications equipment (onboard and trackside), military applications, oil/gas processing, fuel cell applications, transportation, telecommunication systems, process control systems, and power stations.
The products' topology delivers up to 600W at any DC input from 18VDC to 380VDC, with six input range choices. AC input options are single-phase 115VAC or 230VAC, as well as a three-phase input of 3 x 200VAC.
Battery charging models are also available. Units have single outputs in nine standard ranges from 8VDC to 290VDC. All outputs are adjustable and tightly regulated to 0.2 percent or better (load) and 0.1 percent (line). Custom input and output ranges are readily available, typically not impacting delivery and at no additional cost.
Convection cooled, the converters perform from -20 to +75°C (derate above +55°C), with an option for -40°C operation. All models have full electronic protection and up to 92 percent efficiency. EMI performance is to EN55022 Class A standards (Class B optional).
Units are packaged in a rugged 3U module with an optional wall mount configuration. Other options include input inrush current limiting, DC input reverse polarity protection, output parallel/redundant operation, remote on/off, Power Fail/DC-OK alarms, system reset, and programming/monitoring functions.
For more information, contact: Schaefer, Inc., 200 Butterfield Dr., Ashland, MA 01721
508-881-7330 fax: 508-231-0861 Web:
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