Sigtronics Tone Module — STM
Installation Instructions
Sigtronics Tone Module Features
The Sigtronics Tone Module allows a tone to be heard in
Sigtronics Intercom System Headsets. The tone is activated
by a simple switch closure. It can be used for alarm tones or
back up signaling.
Sigtronics Equipment that may be used with STM
EAI Intercom
UltraSound Intercom
S.A.F.E. Communicator
Sigtronics Tone Module Model: STM
Input Power: 12 Volts DC
Warranty: Two years parts and labor.
Standard Equipment Included
Part Description Part Number Quantity
Interface Cable N/A 1
Hex Nut, 6-32, Locking 100067 4
Phillips Head Screw, 6-32 x 5/8,
Black
100105 4
Installation
Attach the Tone Module in a convenient location using the
included hardware. Verify that the adapter unit and cable
will not interfere with the normal operation of any vehicle
controls or the operation of vehicle compartment doors.
The level of the tone in the intercom headsets is dependent
on both the intercom volume setting as well as the individual
headset volume control. Additionally, an internal level adjustment is provided on the side of the Tone Generator chassis.
Connect the wiring harness color-for-color to the Sigtronics
intercom and vehicle power. See table below.
Connector Pinout
Pin
Wire
Color
1 Red Power Input +
White /
2
Green
3 Tan Output to Intercom
4 Black Output to Intercom
Function Connect To
Signal Input
Vehicle Power
+12VDC
Tone Sensor or
Switch *
Intercom Crew Mic
Input Line ( Tan ) **
Intercom Common
Return Line ( Black )
NOTES:
* To output tone, switch Signal Input to ground. To stop tone,
open Signal Input.
Specialists in “SOUND” Management
178 East Arrow Highway, San Dimas, CA 91773 ( 909 ) 305-9399
Made in the U.S.A.
** Connection to an unused headset position is preferred. How-
ever, it will also work connected to a used headset position.
1-8-2007 stm.pdf
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