Sigtronics S-A-F-E Installation Instructions - Manual (Page 5)

If mounting the PTT switches directly into a panel the switch
is mounted from the front and the panel can have a maxi-
mum thickness of 3/16 of an inch.
In the selected spot, drill a 5/8 inch hole. Mount the switch
into the hole but only loosely install the provided lock washer
and nut from the back. The PTT switch will likely have to be
removed to connect the wires later. The nut requires a 7/8”
wrench
III. HEADSET JACK AND PTT SWITCH WIRING
The wiring of the headset jacks and PTTs is straight forward.
In general, the 4 foot Headset Jack and PTT Switch Cable gets
wired to the four conductor Hook-up Wire (gray) and then
the Hook-up wire connects to the jacks and the PTT switches.
Flexible four conductor hook-up wire is provided with each
system to connect each headset jack and PTT switch to the
SAFE unit’s Headset Jack and PTT Switch Cable. Enough
wire is provided for a typical vehicle installation. If required,
additional hook-up wire can be purchased through your
Sigtronics dealer.
Each headset jack requires three wires. Each PTT switch
requires two. If an Officer’s PTT switch and headset jack are
mounted near each other, only four wires are needed.
Refer to the SAFE Unit Wiring Diagram (see Figure 4) for the
exact wiring information.
The connections between the Headset Jack and PTT Switch
Cable and the hook-up wire should be soldered and insulated
for reliability. Do not use crimp type splices. They can become
intermittent over time. Use a good quality electrical tape,
or better yet, use heat shrink tubing to cover the soldered
connections. The connections to the headset jacks and PTT
switches will also have to be soldered. See Figure 3 for jack
terminal identification.
We also do not recommend using screw type terminal strips
for Headset Jack and PTT connections. There have been
several instances where terminal strips introduced high levels
of electrical noise like alternator whine into the system. It
is acceptable however to tie the SAFE unit’s red and green
power wires to existing vehicle terminal strips
The best place to run the wiring between the unit and the
jack and PTT switches is out of sight. It should be run behind
vehicle panels and/or up in the headliner. This will reduce the
chance of personnel or equipment catching on or damag-
ing the wiring. Wire routing should take into account normal
vehicle operations. Wires should not interfere with any of the
vehicle’s controls, compartments, or doors. If the vehicle’s cab
tilts up for engine servicing, run wiring along the existing
page 5
FIGURE 4
2.) VEHICLE CHASSIS GROUND , SAME AS RADIO GROUND
SAFE UNIT WIRING DIAGRAM
1.) CONNECT EITHER WHITE WIRE TO THE RADIO PUSH-TO-TALK (PTT)
KEY LINE INPUT PIN. CONNECT THE REMAINING WHITE WIRE TO THE
PTT KEY LINE RETURN. (USUALLY RADIO GROUND)
3.) 25 PIN CONNECTOR. PIN NUMBER IN ( )
(9) WHITE/RED
(10) WHITE/BLACK
(12) WHITE/BLUE
(13) WHITE/ORANGE
(7) TAN
(8) GREY
(6) TAN
(5) BLACK
(11) BLUE
RADIO
NO. 2
(FM)
123
RADIO
NO. 1
(A/C)
123
TIP
BARREL
RING
HDST. JACK
OFFICER 1
UNIT RIGHT SIDE
HDST. JACK
OFFICER 2
CREW SEAT
HDST. JACK
UNIT RIGHT SIDE
CREW SEAT
HDST. JACK
UNIT RIGHT SIDE
RING
BARREL
TIP
TIP
TIP
BARREL
BARREL
RING
RING
UNIT LEFT SIDE
ORANGE ORANGE
SPEAKER HI
(4)
SPEAKER LO
(3)
RADIO
AUX
123 SPEAKER LO VIOLET (14)
MIKE AUDIO LO BLACK (19)
MIKE AUDIO HI BROWN (18)
SPEAKER HI VIOLET (15)
PTT HI NOTE 1 WHITE (16)
PTT LO NOTE 1 WHITE (17)
SPEAKER HI VIOLET (21)
WHITE (22) NOTE 1 PTT HI
SPEAKER LO VIOLET (20)
BLACK (25) MIKE AUDIO LO
WHITE (23) NOTE 1 PTT LO
BROWN (24) MIKE AUDIO HI
RED (2) TO + 12/24
(1 AMP)
FUSE
TO CHASSIS GROUND GREEN (1)
RED
VOLTS D.C.
PTT SWITCH
PTT SWITCH
AUX BOTH
AUTO REC
VOL
XMIT
SELECT
S-A-F-E
Communicator
FM
OFF
OFF
SQ
INTERCOM INTERCOM
ON
OFF VOL
A/C
SQ VOL
AUX BOTH
AUTO REC
VOL
XMIT
SELECT
FM
OFF
OFF
A/C