Sigtronics Sport 200 S Installation Instructions - Manual (Page 2)

INTERCOM
PANEL
4–40 SCRE WS
SWITCH
NUT
INTERCOM
DO NOT REMOVE
THESE NUTS
KNOB
KNOB
AIRCRAFT
PANEL
Figure 2
SHOULDER
WASHER
FLAT
INSULATED
WASHER
FLAT
METAL
WASHER
NUT
AIRCRAFT
PANEL RING
BARREL
TIP
Microphone Jack
AIRCRAFT PANEL
NUT
Black
BARREL COMMON)
WHITE / VIOLET
TIP ( RIGHT )
WHITE / BROWN
RING ( LEFT )
Figure 5
RIGHT
LEFT
STEREO
+
-
+
-
+ -
+ -
R
C
R
C
C – 220 MFD, 25 VOLT CAPACITOR
R – 100 OHM, 5 WATT RESISTOR
NO CONNECTION
J2 (6) WHITE / VIOLET
J2 (4) WHITE / BROWN
J2 (5) BLACK
To Sport 200 S
Figure 6
Figure 3
page 2
2. Insert the Sport 200 S unit from the rear of the aircraft panel with the
appropriate arrow on the unit chassis pointing upwards.
3. Install the printed Sport 200 S panel and lightly thread the two 4-40
screws through the holes in intercom panel. The nuts on the Volume
and Squelch controls will fit inside the 3/8” diameter holes.
4. Tighten the two screws and switch nut.
5. Install the knobs on the Volume (VOL) and Squelch (SQ) control shafts
and tighten the Allen screws.
MOUNTING HEADPHONE AND MICROPHONE JACKS (See Figure 3)
1. Locate the mounting areas. (One mic and one headphone jack required
for each headset). Again, make sure that the jacks will not interfere
with any aircraft control components. (Note that the jack contacts will
expand when a plug is inserted into the jack and must have clearance
to prevent shorting.)
2. Drill 3/8” diameter holes for headphone jacks and install.
3. Drill 1/2” diameter holes for the mic jacks and install with the insulating
washers supplied. (See Figure 3).
Note: If the aircraft already has pilot headset jacks, the location can be
used for intercom with the following changes. The mic jack must be
re-wired as follows:
1. Remove any existing wires from the tip, ring, and barrel connections.
2. Connect the intercom white/black wire to the ring terminal.
3. Connect one end of a ground wire to the barrel terminal of the mic jack
and connect the other end to Intercom Central ground Point “A”.
4. Install insulating washers as necessary if the barrel of the mic jack
is mounted in metal. For the headphone jack, replace the mono
headphone jack with the stereo headphone jack. Connect the green
wire (P2 pin 1) to the tip connection. Connect the white/green wire
(P2 pin 2) to the ring connection.
WIRING INSTRUCTIONS
Connections should be made as shown in Figure 4 and indicated in
Tables 1 & 2. Also read the following notes referenced in Tables 1 & 2.
If longer wire lengths are required, use a good quality multi stranded
hook-up wire - 22 gauge or larger. Although not necessary, shielded
audio wire can be used if desired.
1. The blue wire from Pin 3 must be connected to the aircraft radio
headphone output - NOT the speaker output. NOTE – If aircraft radio
volume heard in the headsets changes significantly when switching
the ON/OFF switch a minor modification to the installation will fix this.
Just install a small 1/4 watt resistor in line with the blue wire. Select a
value between 220 and 560 ohms for best results.
2. Connect all intercom mic jack grounds to a single aircraft chassis
ground point - Intercom Central ground Point “A” - as shown in Figure
4. (Use the black washers supplied to insulate the intercom mic jacks
from aircraft chassis ground). Note this intercom central grounding
point is used to eliminate any unwanted electrical noises, such as
alternator whine or strobe noise, from being induced into the intercom
system through the grounds. All intercom mic jack barrels must be
insulated from ground where they are mounted and connected back
to Intercom Central Ground Point “A” on their own individual ground
wire. Similarly, both intercom ground wires (J1 pin 4) and the push-
to-transmit switch grounds must also be connected back to Intercom
Central Ground Point “A”. It is not necessary, however, to connect the
headphone jack barrels to Intercom Central Ground Point “A”. They can
either be grounded where they are mounted or some place nearby.
3. The red wire may be connected to either 12V (14V) or 24V (28V)
power source. No switching or adjustments are required to operate
from either source.
4. The Sport 200 S system provides a stereo music input. This music
input accepts portable music Headphone or Line level music sources.
The wiring diagram shows how to wire the Sport 200 S for use with a
portable stereo music source. A small stereo input jack is supplied for
this purpose. Connect the White/Brown, White/Violet, and Black wires
to one jack as shown in Figure 4. Identify the jack terminals using Figure
5. Drill a 1/4-inch hole for the jack
and mount on the aircraft panel.
To use, connect an adapter cable
between the music input jack and
the output of the portable stereo.
Suitable cables are available at
your local Stereo or electronics
store as well as from Sigtronics.
Speaker level output car stereo
music sources can also be used
with the Sport 200 S system. A
Floating Ground Adapter or a four
wire to three wire converter will have to be used between the Stereo
and the Sport 200 S music input. Figure 6 shows such an adapter and
how it is wired into the Sport 200 S.
5. The Sigtronics Sport 200 S system can be installed as shown for use
with Stereo headsets. Alternatively, monaural general aviation type
headsets can be used. To use monaural headsets follow the installation
instructions as normal except for the wiring of the stereo headphone
jacks. Use the stereo headphone jacks supplied with the Sigtronics
Sport 200 S but leave the “RING” connections open. Instead connect
both headphone wires to the “TIP” of the respective jacks. Connect
both the WHITE/GREEN and GREEN on to the TIP of the headphone
jack.