Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 37 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
SIGNAL
#
SIGNAL NAME SIGNAL TYPE
10 ALT Summary Fault DCC. Contacts Open = ALT Axis
Fault
11 Status Common Isolated Return for above contacts
RELAYS
12 ALT Brakes Released DCC. Contacts Closed = Brakes
released
13 ALT Pos-Neg Interlock Limit DCC. Contacts Open = Limit (I) (SF)
14 AZ-ALT CCU Off DCC. Contacts Open = CCU Off (SF)
15 ALT Stow Pin Engaged DCC. Contacts Open = Pin Extended
(I) (SF)
16 Dome Crane Interlock ALT DCC. Contacts Open = Crane Intlk (I)
(SF)
17 ALT Overspeed Interlock (Speed > 125%
slew rate)
DCC. Contacts Open = Overspeed (I)
(SF)
18 ALT Auxiliary Drive Enabled Interlock DCC. Contacts Open = Aux Drive On
(I) (SF)
19 Relay Common Isolated Return for above contacts
SWITCHES
20 ALT Neg Vicinity Limit DCC. Contacts Open = Limit
21 ALT Pos Vicin ity Limit DCC. Contacts Open = Limit
22 ALT Neg Pre-Interlock Limit DCC. Contacts Open = Limit
23 ALT Pos Pre-Interlock Limit DCC. Contacts Open = Limit
24 ALT Velocity Limit (Axis limited to
0.5°/sec)
DCC. Contacts Open = Velocity
Limited
25 ALT Parked DCC. Contacts Closed = Parked
26 Switch Common Isolated Return for above contacts
ENCODER
27 ALT Tape Encoder Read-Head 1, Tape 1 Sin-Cos 1 V pp + Ref Mark (*)
28 ALT Tape Encoder Read-Head 2, Tape 1 Sin-Cos 1 V pp + Ref Mark (*)
29 ALT Tape Encoder Read-Head 1, Tape 2 Sin-Cos 1 V pp + Ref Mark (*)
30 ALT Tape Encoder Read-Head 2, Tape 2 Sin-Cos 1 V pp + Ref Mark (*)