GAI-Tronics DEX-101 Hazardous Area Driller's Intercom Station - Manual (Page 4)

Pub. 42004-679L2G
M ODEL DEX-10 X AND DEX-20 X D RILLER ’ S I NTERCOM S TATIONS Page 3 of 13
f:\standard ioms - current release\42004 instr. manuals\42004-679l2g.doc
07/13
Installation
General Information
WARNING
Always remove power to this station and any associated equipment before
beginning any installation.
Install equipment without modification and according to all applicable local and national electrical codes.
Consult the National Electrical Code (NFPA 70), Canadian Standards Association (CSA 22.1), and local
codes for specific requirements regarding your installation. Class 2 circuit wiring must be performed in
accordance with NEC 725.55.
CAUTION
The factory-sealed section of this station is only to be opened for maintenance or repair by factory
authorized personnel. Refer to the “Maintenance” section for more details.
WARNING
After installing station and before applying power, verify that the bolts on the factory-sealed section
of the station are set at 30 ft-lbs.
This station has a highly sensitive microphone that allows the user to communicate at a distance from the
station. This station also contains a high gain amplifier that enables operation in high noise
environments.
To prevent feedback problems in the system, the ambient noise levels, volume settings, and station
placement must be taken into consideration. In most cases, stations can be mounted perpendicular to the
same surface and be placed 150 feet apart. This minimum spacing requirement between stations can be
reduced under the following conditions:
 Stations are installed in a high noise environment;
 Stations are configured for simplex mode (depressing T button);
 Stations contain speaker L-pads;
 Stations are placed in separate rooms.