Specifications

Fleet op er a tors may re quest that the
ELT be pro grammed with 24 bit long
mes sage pro to col. The in ter face with the
air craft nav i ga tion sys tem which al lows the
ELT to trans mit po si tion data is un af fected
by this pro to col. The 24 bit ad dress is
de signed to be used with the ELT/NAV
In ter face unit and al lows the ELT to in ter -
face with the air craft nav i ga tion sys tem.
The In ter face unit should be strapped for
the 24 bit ad dress (bi nary “1" to ground)
or con nected to a 24 bit ad dress switch
block which is con fig ured to match the 24
bit switch block con nected to the air craft’s
Mode S tran sponder sys tem. The 24 bit
strap ping will al low the ELT to au to mat i-
cally pro gram it self to the air craft’s 24 bit
ad dress. This fea ture will al low the ELT
to be trans ferred be tween air craft with out
hav ing to re pro gram or re-register the
ELT with the Search and Res cue au thor -
ity. This makes main te nance of the ELT
a sim ple mat ter of re plac ing the ELT.
The user must spec ify 24-bit long
mes sage pro gram ming when or der ing
the ELT.
Fig ure D-1 de picts the typ i cal in stal la tion
con fig u ra tion of the ELT, ELT/NAV In ter
-
face and re lated in ter con nec tions. Fig ure
D-2 shows the wir ing in ter con nec tion for
the ELT with an ELT/NAV In ter face.
D.2. ELT/NAV In ter face
Com mu ni ca tion For mats
The ELT/NAV In ter face unit sup ports
ARINC 429 and RS-232 data bus for mats.
All ARINC 429 Stan dard and GAMA
(high or low speed) se rial bus for mats are
sup ported. La bels 310 (lat i tude) and 311
(lon gi tude) are re quired.
The only RS-232 for mat which is sup-
ported is lim ited to the fol low ing con di -
tions:
Baud Rate (fixed):9600
Par ity: None
Data Bits:8
Stop Bits:1
In ad di tion the RS-232 for mat must have
a Start of Text (STX): an “A” iden ti fier for
lat i tude; a “B” iden ti fier for lon gi tude and
END of Text (ETX). The for mat ex pects
car riage re turns but will not op er ate if
there are line feeds.
The fol low ing man u fac turer’s nav i ga tion
sys tems are known to in ter face with the
ELT/NAV In ter face sys tem:
ARNAV SYS TEMS INC.:
•
R50, R50i, STAR 5000, FMS 5000,
MFD (Multi-Functional Dis play).
II MOR ROW:
• FLYBUDDY, 2001 NMS
BENDIX-KING:
• KLN 88, KLN 90
TRIMBLE:
• NAV 1000, NAV 2000, TNL 2100, and
TNL3100. The fol low ing Trimble sys
-
tems all re quire a RS-422 to RS-232
adapter: NAV 3000, TNL 1000, TNL
2000, TNL 2000A, TNL 3000, 2000 AP
-
PROACH, 2000 AP PROACH PLUS,
2101 AP PROACH, 2101 AP PROACH
PLUS, 2101 I/O AP PROACH, 2101 I/O
AP PROACH PLUS.
For other equip ment mod els con tact that
equip ment man u fac turer to de ter mine if
their equip ment sup ports the ARINC 429
or RS-232 for mat spec i fied above.
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5000
06/30/99 PAGE D-3