In 182A Color Radar Indicator Installation; Installation Of Cables - Honeywell BENDIX/KING RDR 2000 Installation Manual

BENDIX/KING
2.3.4

IN 182A COLOR RADAR INDICATOR INSTALLATION

The color radar indicator is installed in a mounting tray in the instrument panel of the aircraft. The
total space required for the radar indicator can be determined from the outline and mounting dia-
gram, figure 2-31.
The mounting tray for the color radar indicator is designed for front loading. Clean all mounting
surfaces before installing the mounting tray to ensure a good electrical bond to the airframe. The
mounting tray is secured to the instrument panel and airframe with four screws, two on each side.
To install the color radar indicator, pull the electrical cables far enough out of the mounting tray to
engage the cable to the connector on the rear of the color radar indicator. Slide the color radar
indicator into its mounting tray.
Press on the front of the color radar indicator with one hand while using an 3/32" Allen wrench to
engage the locking pawls. The locking pawl's access holes are located near the lower left and
right corners on the front panel of the IN 182A.
When a second (optional) indicator is installed in the system, it must be connected as shown in
the interconnect wiring diagram. Observe that the control bus from the second indicator is wired
to a second port on the ART 2000. The same data output from the ART 2000 will be supplied to
both indicators. The second indicator must also be wired to the aircraft's +28 Vdc power bus and
to the panel lighting voltage. The second indicator must use its own circuit breaker that has the
same rating as the first indicator's breaker.
2.3.5

INSTALLATION OF CABLES

The cables should be supported firmly enough to prevent movement. They should be carefully
protected wherever one may chafe against another or against some other object. Extra protection
should be provided in all locations where the cables may be subject to abuse. Shields on shielded
wires should be grounded as shown on the System Interconnect Diagrams.
Shields should be carried through any obstruction via a thru-bulkhead connector. If shielding can-
not be carried through by use of a bulkhead/connector pin, precautions should be taken to ensure
each segment of the shielded lead be grounded at only one point. A ground connection of not
more than two inches in length should be used. The preceding discussion does not apply to co-
axial and quadraxial cable.
The connector J5001 has internal ceramic RFI protection circuitry. Because of this, any undue lat-
eral strain placed on the pins will fracture that part of the connector, which will result in failure. To
minimize this problem, we recommend that enough length be allowed in the wiring harness to cre-
ate a service loop. This allows the connectors to mated straight and true, and reduces the damage
caused to the connector pins. Make certain that the connectors mate straight and true, and that
the locking pawls engage correctly.
If the unit is being installed with the connector on top, we recommend that a moisture shield be
constructed over the connector. This helps prevent moisture from entering the connector, which
causes the unit to fail immediately, and also reduces corrosion on the connector, which eventually
causes a failed condition.
If corrosion is found on the housing portion of the aircraft connector, this could be a result of a
chemical reaction between dissimilar metals in the R/T connector and the connector housing. Re-
place the connector housing on the aircraft harness with a new housing, P/N 030-01176-0010. It
is not necessary to replace the pins.
Page 2-6
CAUTION
BEFORE THE COLOR RADAR INDICATOR IS
PERMANENTLY INSTALLED IN A SELECTED LO-
CATION, DETERMINE BY ACTUAL OPERATION
THAT NO MAGNETIC INTERFERENCE EXISTS
BETWEEN THE COLOR RADAR AND OTHER AIR-
CRAFT INSTRUMENTS.
00643I05.TDC
RDR 2000
Rev 7, July/2002