IFD5XX Installation Manual
600-00299-000
Page 67 of 198
Revision: 02
Table 42: VHF Communication and Navigation Switch Inputs
This input is active if either the voltage to ground <1.9V or the resistance to ground is <375 .
This input is considered inactive if the voltage to ground is 11-33 VDC.
COM Remote Transfer and VLOC Remote Transfer are momentary inputs. Momentarily
depressing the VLOC or Com Remote transfer button toggles the active and #1 standby
frequencies. Momentarily depressing the COM Remote Recall button inserts the next
frequency in the Com preset list into the #1 standby slot.
6.1.10 VOR/ILS Indicator Electrical Characteristics
6.1.10.1 Superflag
Description
Connector
Pin
Signal Type
VOR/LOC Superflag
P1006
15
Output
Glideslope Superflag
P1006
38
Output
Table 43: Navigation Superflag Output
The output supplies not less than 500 mA on a 28 volt system and 250 mA on a 14 volt system
with the output voltage not less than (Aircraft voltage – 3VDC) when the flag is to be out of
view. The output voltage with respect to ground is less than 3 VDC when the flag is to be in
view.
6.1.10.2 RMI/OBI Electrical Characteristics
Description
Connector
Pin
Signal Type
Main OBI Clock
P1001
43
Output
Main OBI Sync
P1001
45
Output
Main OBI Data
P1001
44
Output
Table 44: P1001 OBI Output
Description
Connector
Pin
Signal Type
VOR OBI Clock
P1006
25
Output
VOR OBI Sync
P1006
26
Output
VOR OBI Data
P1006
27
Output
Table 45: P1006 OBI Output
The output is active low.
6.1.11 DME Tuning
The IFD5XX can channel a DME based on the tuned VLOC frequency. The IFD5XX can be
connected to a DME via 2x5, BCD, Slip parallel, or King Serial DME channeling format.
Summary of Contents for IFD540
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