GAI-Tronics DHS-201 Digital Intercom Stations - Manual (Page 6)

Pub. 42004-453C
M ODEL DHS/DHF 200 S ERIES D IGITAL I NTERCOM S TATIONS Page 4 of 25
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Description of Major Components
The 200 Series Digital Intercom Stations are made up of a front panel assembly and a rear enclosure.
The following assemblies are mounted on the interior side of the front panel:
 69539-10x Audio/Interface PCB Assembly
 69547-10x Intercom PCB Assembly
Refer to Figure 5 below. The front panel contains the user interface components (microphone, speaker,
status LED, keypad, and handset) in addition to the 69539-10x Audio/Interface PCBA that provides all
terminations except earth ground. This PCBA also contains controls for volume, gain, and switch
configuration.
The 69547-10x Intercom PCBA connects to the Audio Interface PCBA from below to transmit/receive
audio, data, and control information to and from the central control cabinet. The rear enclosure protects
the electronics from the harsh environment, and also contains the termination for earth ground.
Figure 5. Front Panel Assembly with Intercom and Audio Interface PCBAs