400 SERIES INSTALLATION MANUAL Page 4-5
P/N 190-00140-02 Page Rev L
4.2 POWER, LIGHTING, AND ANTENNAS
4.2.1 Power, Lighting, and Antennas Function
The section covers the Power Input requirements, Lighting Bus input, and Antenna connections.
4.2.2 Power, Lighting, and Antennas Electrical Characteristics
4.2.2.1 Aircraft Power
Pin Name Connector Pin I/O
AIRCRAFT POWER 1 P4001 19 In
AIRCRAFT POWER 1 P4001 20 In
AIRCRAFT POWER 2 * P4001 15 In
AIRCRAFT POWER 2 * P4001 72 In
AIRCRAFT POWER P4002 11 In
AIRCRAFT POWER P4002 12 In
AIRCRAFT POWER P4006 44 In
AIRCRAFT GROUND P4001 77 --
AIRCRAFT GROUND P4001 78 --
AIRCRAFT GROUND P4002 21 --
AIRCRAFT GROUND P4002 22 --
AIRCRAFT GROUND P4006 41 --
* Optional alternate power, applies only to part numbers 011-00280-30 GNS 430, 011-00836-10 GNS 430(A, 011-
00506-30 GNC 430, 011-00837-10 GNC 420(A), and 011-00504-10 (GPS 400).
CAUTION
To operate the GNC 420 P/N 011-00506-00 or GNS 430 P/N 011-00280-00 COM transceiver in a 14-volt
aircraft, a 14 to 28 volt converter such as a KGS Electronics models RB-126 or UC-14-28 or equivalent
must be used. The voltage converter should include a circuit breaker on its output to supply power to
P4002-11 and P4002-12 for the COM transmitter. The other power input pins (P4001-19, P4001-20, and
P4006-44) accept 11-33 V
DC
. GNC 420 P/N 011-00506-10 and GNS 430 P/N 011-00280-10 accept 11-33
V
DC
on all power inputs. Refer to Figure 4-5 on page 4-29.
A power connection on P4006-44 is only required if NAV SUPERFLAG and/or G/S SUPERFLAG is
utilized.
The power inputs P4001-19 and P4001-20 provide power for all functions of the 400 Series unit except the
COM transmitter and the NAV & G/S SUPERFLAG outputs.
4.2.2.2 Lighting Bus
Pin Name Connector Pin I/O
LIGHTING BUS HI P4001 39 In
LIGHTING BUS LO P4001 40 In
The 400 Series unit can be configured to track 28 V
DC
, 14 V
DC
, 5 V
DC
or 5 V
AC
lighting buses using these
inputs. Alternatively, the 400 Series unit can automatically adjust for ambient lighting conditions based on
the photocell. Refer to section 5.2.5.
4.2.2.3 Antennas
Pin Name Connector I/O
GPS ANTENNA P4003 In
COM ANTENNA P4004 I/O
VOR/LOC ANTENNA P4005 In
GLIDESLOPE ANTENNA P4007 In
