2
CERTIFICATION—
FM:
Class I, Div. 1, Groups B, C and D.
Class II, Div. 1, Groups E, F, and G.
Class I, Div. 2, Groups A, B, C, and D (T4A).
Class II, Div. 2, Groups F and G (T4A).
Class III, Div. 1 and 2.
NEMA Type 4X
CSA:
Class I, Div. 1, Groups B, C and D.
Class II, Div. 1, Groups E, F, and G.
Class I, Div. 2, Groups A, B, C, and D (T4A).
Class II, Div. 2, Groups F and G (T4A).
Class III, Div. 1 and 2.
Enclosure Type 4X.
CENELEC:
EEx d IIC T4 (Tamb = –60°C to +75°C)
EEx d IIC T5 (Tamb = –60°C to +65°C)
EEx d IIC T6 (Tamb = –60°C to +50°C)
IP66.
CE:
Conforms to all relevant European norms.
SHIPPING WEIGHT—
Aluminum:
6 lb (2.7 kg)
Stainless Steel:
10 lb (4.5 kg).
DIMENSIONS—
See Figure 1.
DESCRIPTION
The DCU consists of an explosion-proof, NEMA 4X
aluminum enclosure containing a communication
module, a terminal wiring board, and a transmitter
board (catalytic combustible gas models only). The
DCU serves as a single point analog input to the
Eagle Quantum system and is compatible with most 4
to 20 ma instruments. It provides three status indicat-
ing LEDs that are visible through a viewing window on
the enclosure cover, and supports single person non-
intrusive calibration with a Det-Tronics gas sensor.
DETECTOR ENCLOSURE
The NEMA 4X explosion-proof aluminum enclosure is
designed for use in hazardous locations. The remov-
able cover is furnished with a window for viewing the
status indicator LEDs.
STATUS LEDS
Three LEDs are provided for indicating detector sta-
tus conditions. The LEDs are located on the commu-
nication module and are visible through the viewing
window on the enclosure. The green LED serves as a
power-on indicator. The flashing rate of the red LED
indicates detector status (calibrate = slow, fault =
fast, alarm = steady). The amber LED is provided for
factory diagnostic purposes.
EVENT LOGGING
The DCU stores its last eight alarms and calibrations
with date and time stamp in on-board non-volatile
memory using a “First In First Out” (FIFO) format. This
information can then be accessed over the network.
0.32 (0.81) OVAL SLOT MOUNTING
(TYPICAL FOUR PLACES)
3.4
(8.6)
4.7
(11.8)
5.2
(13.2)
0.28
(0.71)
2.7
(6.8)
A2045
6.6
(16.8)
1.28
(3.25)
Figure 1—Dimensions of DCU Enclosure in Inches (Centimeters)
