Sigtronics S-A-F-E Installation Instructions - Manual (Page 3)

Installation Overview
Installation of the Sigtronics SAFE unit is a four step process:
I. Mount the intercom unit. (Intercom Chassis Installation)
II. Install the headset jacks and PTT switches. (Headset Jack
and PTT Switch Installation)
III. Wire up the jacks and PTT’s. (Headset Jack and PTT Switch
Wiring)
IV. Wire up the radios. (Radio Hook Up)
Do not fear, Sigtronics has simplified the installation process,
to assure perfect operation. Refer to the SAFE Unit Wiring
Diagram (Figure 4). If you have any installation questions or
problems that are not addressed in this manual, feel free to
call our installation hot line number located on the last page
of this manual.
I. INTERCOM CHASSIS INSTALLATION
Intercom Placement:
There are a few factors to consider when selecting a spot for
the SAFE unit:
1. The unit should be placed in such a way that its controls
can be easily seen and operated. Most commonly, this will
be near the vehicle’s communication radio controls.
2. The SAFE unit is designed to be dash mounted (above or
below) or mounted from the vehicle’s ceiling.
3. The location selected requires a minimum area of 4.25 by
7.25 inches.
4. The unit mounting bracket has three sets of mounting
holes, allowing three different mounting angles. This
provides for different dash slopes as well as different
viewing angles.
5. Verify that the rear of intercom unit and cable will not
interfere with the normal operation of any vehicle controls
or the operation of vehicle compartment doors.
Intercom Mounting:
1. Once the intercom position is selected, remove the
mounting bracket from the intercom unit. This is done by
removing the thumb screws on both sides of the unit. Two
on each side.
2. Position the mounting bracket on the selected area in
the vehicle. Mark at least two holes for mounting. Drill
the holes using 1/8 inch drill. CAUTION: Make sure that
neither the drill nor the screws will puncture any vehicle
cabling or components.
3. Attach the bracket to the vehicle using the hex head
screws and a 5/16 inch driver.
4. Plug the SAFE unit interface cable into the back of the unit
and tighten the two connector retaining screws finger
tight.
5. Mount the unit on the bracket at the selected angle and
secure the 4 thumb screws.
II. HEADSET JACK AND PTT SWITCH INSTALLATION
Headset Jack Placement:
It is assumed that it has already been determined which posi-
tions on the vehicle will have headsets. At this stage, it is help-
ful to have a headset handy to physically gauge the best place
for a particular jack. There are several things to consider when
selecting a place to mount the headset jacks:
1. In general, for headset positions inside the vehicle, the
jacks should be placed towards the middle between the
user’s positions. They should also be placed up above and
towards the back of the user’s head. This will assure that
the headset cord will not hang between the user and the
vehicle door.
2. The headset jack should be out of the way so that the
headset plug can’t be hit during use or when entering or
exiting the vehicle.
3. The jack position should also take into account how the
headset cord will hang when the headset is in use. The
cord should hang out of the way and should not interfere
with vehicle controls.
4. Verify that the jack placement and headset cable do not
interfere with the normal operation of vehicle doors or
compartments.
5. In vehicles with intercom headset positions installed in
open jump seat locations, the combination of wind, road,
and engine noise, picked up by these jump seat head-sets,
can in some cases produce excessive background noise
in the intercom system. Additionally, wide variations in
engine noise (from idle to high RPM) can falsely trigger
the intercom VOX (voice activated) feature. This is espe-
cially true for older vehicles with open jump seats located
next to the vehicle engine. There are two solutions for this
situation. Solution (a) is the recommended one:
a) Order an additional Push-To-Talk (PTT) switch (and
mounting box if needed) for each open jump seat posi-
tion. These switches can be conveniently mounted at
each jump seat location and wired so that the jump
seat headset microphone is disabled until the switch
is pressed. See Figure 2. The user then presses his PTT
button to talk on the intercom. PTT buttons wired in
this way only activate the intercom. They do not let the
jump seat locations talk on the vehicle radio(s).
b) Order Sigtronics headsets (Models SE-8P, SE-48P, or
SE-18P) with the intercom PTT switch already mounted
on the ear cup for the open jump seat positions. The
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TAN
FIGURE 2
TIP RING
BARREL
HEADSET JACK
INTERCOM PTT SWITCH
BLUE
BLACK
OPEN JUMP SEAT WIRING DIAGRAM