IFD5XX Installation Manual
600-00299-000
Page 149 of 198
Revision: 02
NOTES:
1.
ALL WIRES TO BE 24 AWG OR GREATER UNLESS OTHERWISE NOTED.
2.
CONNECTING TWO MICROPHONES TO MIC AUDIO HI/LO OR INTERCOM MIC HI/LO AT THE SAME TIME
MAY RESULT IN WEAK OR DISTORTED AUDIO. MIC ISOLATION RELAYS ARE RECOMMENDED SO THAT
ONLY ONE MIC IS ACTIVE AT A TIME.
3.
RESERVED
4.
IF THE AUDIO PANEL DOES NOT HAVE A LO INPUT. IT SHOULD BE CONNECTED TO A GROUND LUG AT
THE AUDIO PANEL.
5.
THE IFD540 INTERCOM FUNCTION SHOULD ONLY BE USED IF THERE IS NO OTHER INTERCOM SYSTEM
IN THE AIRCRAFT.
6.
INTERCOM WIRING OPTION:
7.
THE COM REMOTE TRANSFER INPUT (P1002-15) MAY BE USED FOR EMERGENCY OPERATION OF THE
COM TRANSMITTER. IF THE REMOTE TRANSFER SWITCH IS ACTIVE FOR THREE SECONDS, THE ACTIVE
COM FREQUENCY WILL CHANGE TO 121.50 MHZ.
8.
REFER TO MANUFACTURER’S DOCUMENTATION FOR COMPLETE PINOUT AND INTERCONNECT
INFORMATION. PINOUT OF OTHER UNITS SHOWN FOR REFERENCE ONLY.
9.
SHIELDS FOR AUDIO CABLES SHOULD BE GROUNDED AT ONE END (WITH LEADS LESS THAN 3.0
INCHES) AND LEFT FLOATING AT THE OTHER END. IF SHIELDED AUDIO CABLE IS CARRIED THROUGH
DISCONNECT, CARRY SHIELD GROUND THROUGH DISCONNECT ON SEPARATE PIN.
IFD540
COM MIC KEY
COM MIC AUDIO HI
INTERCOM MIC HI
COM MIC AUDIO
P1002
4
6
5
18
NC
COM
INTERCOM
MIC JACK
MICROPHONE
SWITCH (DPDT)
2
4
5
6
7
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Summary of Contents for IFD540
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