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DET
TRONICS
-
APPLICATION
The Eagle 2000 Digital Communication Unit (DCU)
offers a convenient and economical means of obtain-
ing addressable gas detection. The DCU digitizes a
4 to 20 ma analog signal from a sensor/transmitter
and transmits the value as a process variable to the
Eagle communication gateway. All circuitry is housed
in a single explosion-proof/watertight enclosure for
location at the area of detection.
The DCU is provided in various configurations,
depending on the type of gas to be detected. All
DCUs contain a communication module and a termi-
nal wiring board. DCUs for detecting combustible
gas also contain a transmitter board.
The Eagle DCU is available for use with Det-Tronics'
combustible gas, oxygen and toxic gas sensor/trans-
mitters. The DCU can also be used with a wide vari-
ety of "third party" 4 to 20 ma analog instruments.
FEATURES
• Field addressable
• Unique patented fault isolation
• Utilizes state-of-the-art communication technology
• Pass through communication circuitry on power loss
• Ten bit signal resolution capability
• Two alarm setpoints
• Non-volatile memory for logging of alarm and cali-
bration events
• Non-intrusive one person calibration
• LED for calibration, fault and alarm status annuncia-
tion
• EMI hardened
• Screw terminal connectors.
©
Detector Electronics Corporation 2001
®
SPECIFICATIONS
INPUT VOLTAGE—
24 vdc. Operating range is 18 to 32 vdc.
INPUTS—
4 to 20 ma analog signal, with an input impedance of
200 ohms, 10 bit resolution.
OUTPUTS—
Digital communication, transformer isolated (78.5
kbaud). Calibrated 0 to 4095 digital corresponds to 0
to full scale.
POWER CONSUMPTION—
DCU with toxic gas sensor/transmitter:
95 ma maximum.
DCU with transmitter and combustible gas sensor:
180 ma maximum during normal operation, 500 ma
during startup.
TEMPERATURE RANGE—
Operating:
Storage:
SPECIFICATION DATA
Eagle Quantum
Digital Communication Unit
EQ2200DCU
–40°F to +167°F (–40°C to +75°C).
–67°F to +185°F (–55°C to +85°C).
10/01
™
90-1118-01
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Summary of Contents for Det-Tronics Eagle Quantum EQ2200DCU
- Page 1 DCUs contain a communication module and a termi- nal wiring board. DCUs for detecting combustible gas also contain a transmitter board. The Eagle DCU is available for use with Det-Tronics’ combustible gas, oxygen and toxic gas sensor/trans- SPECIFICATIONS mitters. The DCU can also be used with a wide vari- ety of “third party”...
- Page 2 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.
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Page 3: Installation
“sensor replacement switch” on the communication module in the DCU and performing a successful calibration of the sensor. Det-Tronics EagleVision™ software compares the ini- tial calibration to later ones to produce a “sensor sen- ADDRESSABILITY sitivity trend,”... - Page 4 If a sensor separation kit is used, attach the terminal identification. See Figure 6 for an example of a sensor to the separation kit junction box and wire the Det-Tronics electrochemical sensor wired to a DCU. device as described in the “Sensor Separation” section. H 2 S/TOXIC/O 2...
- Page 5 IMPORTANT EQ2200DCU DIGITAL COMMUNICATION UNIT Insulate the shields to prevent shorting to the USED WITH POINTWATCH device housing or to any other conductor. Determine the best mounting locations for the detectors. Whenever practical, detectors should be placed where Attach the communication module to the standoffs as they are easily accessible for calibration.
- Page 6 EQ2200DCUEX DIGITAL COMMUNICATION UNIT COMMUNICATION MODULE USED WITH DET-TRONICS COMBUSTIBLE GAS SENSORS SWITCHES ON SAME SIDE Determine the best mounting locations for the detectors. (RIGHT) Whenever practical, detectors should be placed where they are easily accessible for calibration. Always orient the junction box with the sensor pointing down.
- Page 7 Assembly and Wiring Procedure Screw the transmitter board to the standoffs as shown in Figure 8. Connect the sensor plug to the transmitter Connect the external wiring to the appropriate terminals board. on the DCU terminal wiring board. See Figure 9. Attach the communication module to the standoffs IMPORTANT mounted on the transmitter board.
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Page 8: Ordering Information
ORDERING INFORMATION When ordering, please specify: EQ2200DCU Ex - Eagle Quantum Digital Communi- cation Unit for combustible gas sensors EQ2200DCU Uni - Eagle Quantum Digital Communi- cation Unit for 4-20 ma input from a variety of input devices (PointWatch, toxic sensors, pressure, flow, etc.).
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