Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 34 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
Following are the AZ/ALT PDU to Azimuth LCU interfaces.
TABLE 4.2.2.1.B - AZ/ALT PDU to AZ LCU Interfaces
SIGNAL
#
SIGNAL NAME SIGNAL TYPE
CONTROL COMMAND-STATUS
1 AZ Rate Demand +/- 5 Vdc, +VE = +VE rate
2 AZ Rate Scale Factor OCS Low = 2.0 deg/s, High = 0.2 deg/s
3 AZ Enable Command OCS Low = AZ Enable
4 12V Relay +12V DC Relay power (For items 2,3,40)
5 AZ Actual Rate Scale
factor
DCC. Contacts Open = 2.0 deg/s, Closed = 0.2 deg/s
6 AZ LCU Available DCC. Contacts Closed = AZ LCU Available
7 AZ LCU Enabled DCC. Contacts Closed = AZ LCU Enabled
8 AZ LCU Active DCC. Contacts Closed = AZ LCU Active
9 AZ Axis Enabled DCC. Contacts Closed = AZ Axis Enabled
10 AZ Summary Fault DCC. Contacts Open = AZ Disabled
11 Status Common Isolated Return for above contacts
RELAYS
12 AZ Brakes Released DCC. Contacts Closed = Brakes Released
13 AZ Neg-Pos Interlock
Limit
DCC. Contacts Open = Limit (I)(SF)
14 AZ-ALT CCU Off DCC. Contacts Open = CCU Off
15 Yoke Access Hatch Open
Intlk
DCC. Contacts Open = Hatch Open Intlk (I)(SF)
16 AZ Stow Pin Engaged
Intlk
DCC. Contacts Open = Pin Extended Intlk (I)(SF)
17 Dome Crane Interlock AZ DCC. Contacts Open = Crane Intlk (I)(SF)
18 Pier Access Interlock DCC. Contacts Open = Access Intlk (I)(SF)
19 Mobile Access Platform
Interlock
DCC. Contacts Open = Platform INLTK (I)(SF)
20 Relay Common Isolated Return for above contacts
SWITCHES