The line of SED2 variable-frequency drives has been improved. The enhancements provide increased drive robustness and reliability. A number of software and hardware changes have been made to simplify programming startup and operation. Software features have been added that automatically restart the drive after a main power failure or fault condition. Hardware improvements include increased strength of internal components and connections, a protective coating on internal circuit boards, and a new type RS-485 protective circuit for improved communication reliability.

Siemens Building Technologies Inc., 1000 Deerfield Pkwy., Buffalo Grove, IL 60089; 847-215-1000; or

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