Pub.: 42004-679L2D
M
ODEL
DEX-10
X AND
DEX-20
X
D
RILLER
’
S
I
NTERCOM
S
TATIONS
Page 2 of 13
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Features and Functions
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Digital and analog models
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Factory sealed
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120–240 V ac and 24 V dc models
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Suitable for Div. 1 & 2 and Zone 1 & 2 Hazardous Areas
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NEMA-4X rated enclosure
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Suitable for high noise areas
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18-watt speaker amplifier
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Hands-free duplex and simplex communication
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Speaker volume control
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All-call and group paging
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Beacon control (digital models only)
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Broadcast of alarm and music signals
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Footswitch input
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Master/slave and point-to-point communications
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Call status indicator
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System upgrade and expansion capability
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UL Approved
Available Models
DEX-101
Analog Intercom Station - 24 V dc (UL)
DEX-201
Analog Intercom Station – 120 V ac (UL)
DEX-102
Digital Intercom Station with keypad – 24 V dc (UL)
DEX-202
Digital Intercom Station with keypad – 120 V ac (UL)
Description of Major Components
The Driller’s Intercom stations consist of a factory-sealed enclosure (top) and a termination enclosure
(bottom). Refer to Figure 1 for details. The factory-sealed configuration eliminates the need for external
seals on this unit; however, additional seals may be required on auxiliary devices.
The audio, control, and power components for this assembly are contained in the factory-sealed
enclosure. The front panel of the factory-sealed enclosure contains the user interface components
(microphone, status LED, and keypad [digital models only]).
All system terminations (power, speaker, system, footswitch, and beacon) are to be made in the
termination enclosure.
This station requires an external speaker (sold separately) to operate. Also, a customer-supplied beacon
(digital models only) and footswitch can be added to this unit for visual status indication and talk/listen
control.
CAUTION
Use only suitably listed components for the hazardous area.