Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 36 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
SIGNAL
#
SIGNAL NAME SIGNAL TYPE
ISOLATION AMPLIFIER POWER SUPPLIES
40 +12V DC Low Voltage Power (0V on item 38)
41 -12V DC Low Voltage Power (0V on item 38)
(I) – Causes Interlock
(SF) – Causes Summary Fault
(OP) – Output from LCU
DCC – Dry-Contact Closure
OCS – Open-collector sink
(*) = Standard Heidenhain Read Head 15-way D-Sub connections.
Following are the AZ/ALT PDU to Altitude LCU Interfaces.
TABLE 4.2.2.1.C - AZ/ALT PDU to ALT LCU Interfaces
SIGNAL
#
SIGNAL NAME SIGNAL TYPE
1 ALT Rate Demand +/- 5 Vdc, +VE = +VE rate
2 ALT Rate Scale Factor OCS Low = 2.0 deg/s, High = 0.2 deg/s
3 ALT Enable Command OCS Low = Enable
4 12V Relay +12V DC Relay power (For items
2,3,67,36)
5 ALT Actual Rate Scale Factor DCC. Contacts Open = 2.0 deg/s,
Closed = 0.2 deg/s
6 ALT LCU Available DCC. Contacts Closed = ALT LCU
Available
7 ALT LCU Enabled DCC. Contacts Closed = ALT LCU
Enabled
8 ALT LCU Active DCC. Contacts Closed = ALT LCU
Active
9 ALT Axis Enabled DCC. Contacts Closed = ALT Axis
Enabled