August 2 and 3, 2010

KOSMOS INSTRUMENT ELECTRONICS (IE)

Dan PappalardoOhio State University

Department of Astronomy

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KOSMOS IE

• What is included in Instrument Control?– Motor/Mechanism control– Position feedback– Process variable indication– Any I&C that is not image

acquisition/detector control

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MODS/OSMOS IE FEATURES

• All mechanisms use stepper motors• All mechanism control channels use

identical controller• All mechanisms use identical cabling• Multiple mechanisms can be moved

simultaneously, typically about 4.

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KOSMOS IE = OSMOS IE

• Mechanism suite• Microlynx 7 motor controller• Comtrol Serial Port Server• Wago I/O node• Item Frame and internal panels• OSU Motor Board• Power Supply (65VDC)

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Inst Electronics System Diagram

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WAGO 750 I/O SYSTEM ML7 MOTOR CONTROLLERS

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KOSMOS IE ≠ OSMOS IE

• Different shutter and non-OSU camera electronics may have shutter control going through IE

• Shutter has position feedback via RS-232 which could be read by IE

• Low power sleep mode that shuts off 65V power and motor controllers will be added.