The KELT building roof and lights are controlled by the Control Computer, through the PLC (Programmable Logic Controller). The PLC sits inside the KELT building, and have manual controls for a local operator to open and close the roof and control the lights.

The PLC also monitors the rain detector and the roof limit switches.

PLC documentation

Intelligent Roof Controller for KELT-S.doc (start here for introductory overview)

KELT-S PLC command structure.xls

KELT PLC installation and testing manual.doc

KELT-S PLC communication Protocol.doc

PLC Circuit and Block diagrams

KELT-S PLC block diagram.bmp (10MB)

KELTS-S Roof controller circuit diagram.jpg

KELTS-S Roof controller circuit diagram.bmp (10MB)