Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 32 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
Figure 4.2.2.1.E - LCU Interface Block Diagram
AD07 dictates that galvanic isolation is maintained between VertexRSI and LCU equipment.
This is accomplished by the use of dry-contact closure for digital signals and the use of
Isolation Amplifiers for analogue signals. Please refer to Figure 4.2.2.1.F - LCU Axis
Control Logic Block Diagram. The LCU Interface board accepts a pulsed signal required by
the Flip-Flop logic of the Control Board. Isolation Amplifiers will be used for the LCU-
generated (rate commands) and the PDU-generated analogue signals (rate and current
feedback).