3M PELTOR WS LiteCom Pro III - 14 Interfaces; 14.1 External interface pin out:

© 3M Svenska AB
Värnamo, Sweden
14 Interfaces
14.1 External interface pin out:
Pin 1
x EXTERNAL PTT
x Activated when shorted to Pin 2 (ground)
Pin 2
x GROUND
Pin 3
x INPUT
x The input signal is mixed with the WS™ LiteCom Pro II audio output level
(speaker output).
o 94 mV = Input signal level for which the mean
plus one standard deviation equals 82 dB(A) in cup.
Pin 4
x BOOM MICROPHONE OUTPUT
x Applied signal at the boom microphone input comes out on pin 4
o 2, 25 mV Microphone input = 10 mV output
External audio input levels EN 352-6:
Input signal level pin 3 U (mV, RMS)
Mean sound pressure level in cup(dB(A))
Standard Deviation
Sound Pressure (dB)
28,1
70,8
0,7
49,9
75,8
0,7
88,8
80,8
0,7
157,9
85,7
0,7