ATR833S / P/N 833S-(Cxxx)-(Cxxx)
Operation and Installation
37
Document-Nr.: 01.142.010.71e / Revision:1.03
4.6 Equipment Connections
One 25 pin D-SUB miniature connector includes all electrical
connections, except for the antenna.
4.6.1 Microphone Connection
The ATR833S automatically detects which type of microphone, dynamic
or standard is connected to the unit.
Standard
microphones
(Headset)
and
dynamic
microphones
(hand/gooseneck) can principally be used in parallel.
When the motor is running, dynamic microphones should be switched off
(MIC connected to GND) in order to prevent transmission of the motor
noise.
Two microphones of the same type may be connected in parallel per
input.
4.6.2 Headset-Connection
Two headsets may be connected in parallel per input. In this case the
total
impedance shall not be less than 100 Ω.
4.6.3 Audio-Input
The external audio input can be used for the input of warning tones or
music etc. In order to avoid disturbances, while this input is not used, the
respective wire needs to be short-circuited.
The (+UB)-wire (PWR
– Pin 11/12) has to be protected by a
circuit breaker (4 Amp. slow-blow)!