Pub. 42004-692L2C
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374
800-492-1212
Fax: 610-796-5954
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G A I - T R O N I C S ® C O R P O R A T I O N
A H U B B E L L C O M P A N Y
Model DEX-103 and DEX-203
Hazardous Area Driller’s Intercom Stations
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAI-
Tronics retains all intellectual property and other rights in or to the information contained herein, and
such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
General Information
Product Overview
The Driller’s Intercom is a communications system
designed to serve the needs of oil and gas industry on
oil drilling platforms, especially in hazardous areas. It
provides all-call, group call, and point to point
communications, and is available in digital and analog
versions.
The enclosure is rated IP56, and is factory sealed to
ensure explosion-proof integrity.
System Requirements and Limitations
Each Driller’s Intercom system requires a Central
Switch to operate. The Central Switch must be located
in a non-hazardous area. The configuration parameters
for all components of the system are set in the Central
configuration.
Each central switch can manage up to 16 digital or analog subscribers, and can be expanded to 32
subscribers. Central switches can be linked or a larger switch can be used for increased system size. By
combining central switches, the system is easily expanded at any time.
All stations must be connected in a star configuration to the Central Switch, but power to the stations can
be daisy-chained. Please refer to the “Installation” section for the power cable and system cable distance
limitations.
Additional features and functions (not detailed in this manual) are available. Refer to the Central Switch
manual or contact a GAI-Tronics Corporation representative for more details.
Figure 1. Driller’s Intercom with Keypad
