ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 1000 (P/N: A3-06-2749-1)
Y1-03-0259 Rev. U
Company Confidential
Page 46 of 62
6.
Wiring
A.
General Considerations and Recommendations
CAUTION:
IF GROUND OR OTHER CONNECTIONS ARE BROKEN OR OTHERWISE DAMAGED, THE ELT IS
STILL CAPABLE OF AUTOMATIC ACTIVATION; HOWEVER, THE COCKPIT REMOTE SWITCH
MAY BE INCAPABLE OF RESETTING THE ELT AND OPERATION MAY NOT BE INDICATED ON
THE REMOTE SWITCH LED.
CAUTION:
INCORRECT TERMINATION OF THE WIRING IN THE CONNECTORS MAY DAMAGE THE ELT,
CAUSE TRANSMISSION ISSUES, OR RESULT IN A NON-FUNCTIONING REMOTE SWITCH.
VERIFY THE WIRING AGAINST THE WIRING DIAGRAM AND PERFORM A CONTINUITY CHECK
TO CONFIRM GOOD CONNECTIONS AND PROPER PIN LOCATIONS.
CAUTION:
TO PREVENT INADVERTENT ELT ACTIVATION OR POSSIBLE COMPONENT DAMAGE, DO NOT
CONNECT THE HARNESS TO THE ELT OR COCKPIT REMOTE SWITCH UNTIL ALL POWER AND
GROUND WIRING CONNECTIONS ARE COMPLETED AND VERIFIED.
1)
The following wiring and grounding considerations and recommendations are applicable:
a)
Minimum 22 AWG wire size.
b)
Shielding is recommended to help prevent EMI and RF interference.
c)
Use high quality conductor meeting MIL-W-16878, M22759, M27500, or a commercial equivalent
acceptable for use in aircraft applications.
d)
Provide a “Drip Loop” in the remote switch harness connection to the ELT to divert moisture from the
connector.
e)
Provide a “Service Loop” in the remote switch harness connection to the remote switch assembly, such that
the assembly can be withdrawn from the panel far enough to easily disconnect the harness plug.
f)
For 5-wire remote switch installations, ELT and remote switch grounds must be common to aircraft ground
and should be less than 10Ω.
2)
Refer to the following schematics for suggested installation wiring.
Figure 20 Typical 2-Wire Installation for Unshielded Harness
