ACR&Artex ELT to Nav Interface Boeing - Manual (Page 29)

25-69-11
Page 29 of 58
JUL 28/11
ACR ELECTRONICS, INC / ARTEX PRODUCTS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
-B (453-6501)
SUBTASK 25-69-11-870-002
B. Input/Output
(1) Table 4 lists the ELT/NAV Interface -B electrical pinout specifications.
Table 4. Input/Output Specifications
PIN DESCRIPTION CHARACTERISTIC
P2-1 Power Input
+28 VDC ±5 VDC
300 mA max.
P2-2 5.6 VDC Output
Vmax = 6.0 VDC
Vmin = 5.3 VDC
P2-3
ARINC 429-A Input
(Auto Speed Select)
High/Low
Standard or GAMA
P2-4
ARINC 429-B Input
(Auto Speed Select)
High/Low
Standard or GAMA
P2-5 Not Used N/A
P2-6 Not Used N/A
P2-7 Not Used N/A
P2-8 RS-232 RX RS-232
P2-9 TX Output RS-232
P2-10 RX Input TTL
P2-11 ELT/NAV Ground Aircraft Ground
P2-12 ELT Ground Aircraft Ground
P1-1 thru 24 24-bit Address Input
Ground =1
Open = 0
P1-25 and 26 24-bit Address Return 24-bit Ground