User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-1: T
3
CAS Computer Unit Interface Description (cont)
(Applicable to Part No. 9005000-10000, -10101, -10202, -10204, and -11203)
Connector
Pin
Designation
Functional Description
RMP-12B
(Continued)
ARINC 552/552A
-20 < H < 480 ft: Voltage = [ 0.02 x (H + 20) ] V dc
480 < H < 2500 ft: Voltage = [ 10 x ( 1 + ln((H + 20)/500)) ] V dc
Where H = Radio Altitude in ft.
Maximum Voltage output is 26.2 V dc at any height above 2500 ft .
Collins BCA
-20 < H < 500 ft: Voltage = [ 0.02 x (H + 20) ] V dc
500 < H < 2500 ft: Voltage = [ 10.4 + 0.003 x (H - 500) ] V dc
Where H = Radio Altitude in ft.
Maximum Voltage output is 26.2 V dc at any height above 2500 ft.
AHV 6 Linear
0.0 to 25.0 V dc: H = 200V - 20
Where H = Radio Altitude in ft and V = Voltage in V dc.
Radio Altimeter Type Select Program Input No.4 (NO)
AHV 6 Log
0.0 to 10.4 V dc: H = 50V - 20
> 10.4 to 18.09 V dc: H = EXP(0.1479V + 4.7289)
> 18.09 to 25 V dc: H = 695 + EXP(0.2532V + 2.1111)
Where H = Radio Altitude in ft and V = Voltage in V dc.
APN 232
0.0 to 27.0 V dc: H = 200V
Where H = Radio Altitude in ft and V = Voltage in V dc.
4-20
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.