Det-Tronics Eagle Quantum EQ2200DCU User manual

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.
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: –40°F to +167°F (–40°C to +75°C).
Storage: –67°F to +185°F (–55°C to +85°C).
SPECIFICATION DATA
Eagle Quantum™
Digital Communication Unit
EQ2200DCU
©Detector Electronics Corporation 2001 10/01 90-1118-01
DET-TRONICS®

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)

CALIBRATION LOG
Each time the sensor attached to the DCU is calibrat-
ed, the zero and span levels as well as the time and
date of the calibration are recorded. The initial cali-
bration is kept for the life of the sensor, and all subse-
quent calibrations are stored in a seven record FIFO
format. When the sensor is replaced, the calibration
log is cleared by pressing the “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-
sitivity trend,” which can be a valuable maintenance
or troubleshooting tool. Refer to the Eagle Quantum
system manual, form number 95-8470, for complete
instructions regarding calibration.
FAULT TOLERANT NETWORK
The DCU utilizes a unique patented fault isolation
technique for detecting and isolating a wide variety of
network wiring problems. Using a combination of on-
board software and hardware, the module can deter-
mine when network integrity has been compromised.
Corrective action is taken by electrically disconnect-
ing the faulty segment of network wiring and properly
terminating the “good” side of the network. This auto-
matic “reconfiguration” changes the topology of the
network from a ring that starts and ends at the gate-
way to a linear bus network that is properly terminated
on either side of the isolated faulty network segment.
The DCU communicates with the LCU over the digital
highway as shown in Figure 2. In the event of a single
open or short circuit on the digital highway, all units
will be fully functional (condition A). In the event of
multiple open or short circuits on the digital highway,
all units except those between the two faults will be
able to communicate with the gateway (condition B).
ADDRESSABILITY
Each device on the LON/SLC must be assigned a
unique address. This is accomplished by setting DIP
switches on the module’s circuit board. See Figure 3.
Each rocker switch has a specific binary value. The
node address is equal to the added value of all closed
rocker switches. All open switches are ignored. The
valid address range is from 5 to 250. Refer to the
Eagle Quantum system manual (form 95-8470) for
additional information.
REED SWITCH
A magnetic reed switch, located on the terminal
board, enables calibration of the sensor without open-
ing the enclosure. The switch is activated by placing
a magnet on a specified location on the side of the
enclosure.
INSTALLATION
The detectors are wired on a digital communication
loop starting and ending at the gateway, using com-
munication grade shielded twisted pair wire. Wiring
for power, inputs and outputs must be 18 AWG mini-
mum.
3 90-1118
LCU
B1544
CONDITION A
(OPEN OR SHORT) CONDITION B
(OPEN OR SHORT)
Figure 2—Communication by means of the Digital Highway
12345678 1234
1 2 4 8 16 32 64 128
OPEN OPEN
}
LEAVE IN
OPEN POSITION
NODE ADDRESS EQUALS THE ADDED VALUE
OF ALL CLOSED ROCKER SWITCHES A1557
BINARY
VALUE
CLOSED = ON
OPEN = OFF
Figure 3—Field Device Address Switches

NOTE
Refer to the Eagle Quantum system manual,
form number 95-8470, for complete instructions
regarding wiring and installation.
EQ2200DCU DIGITAL COMMUNICATION UNIT USED
WITH DET-TRONICS H
2
S/O
2
SENSORS OR OTHER
TWO-WIRE 4 TO 20 MA DEVICES
Determine the best mounting locations for the detectors.
Whenever practical, detectors should be placed where
they are easily accessible for calibration.
WARNING
Do not apply power to the system with the cover
removed unless the area has been verified to be
free of combustible gases or vapors.
The DCU utilizes the following:
1. A terminal wiring board mounted at the bottom of
the junction box.
2. A communication module mounted above the termi-
nal wiring board using the standoffs provided. See
Figure 4.
Assembly and Wiring Procedure
Attach the sensor to the DCU enclosure. Do not over-
tighten. If a sensor separation kit is used, attach the
sensor to the separation kit junction box and wire the
device as described in the “Sensor Separation”section.
CAUTION
The sensor threads can be coated with an appro-
priate grease to ease installation. Also lubricate
the cover threads.
Connect the external wiring to the appropriate terminals
on the DCU terminal wiring board. Refer to Figure 5 for
terminal identification. See Figure 6 for an example of a
Det-Tronics electrochemical sensor wired to a DCU.
4
A1571
COMMUNICATION MODULE
STANDOFFS (4)
TERMINAL WIRING BOARD
Figure 4—Printed Circuit Boards in Universal DCU
1
2
3
4
5
6
7
8
9
10
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
A1726
Figure 5—Terminal Identification for DCU
1
2
3
4
5
6
7
8
9
10
BLACK
RED
GREEN
DCU H2S/TOXIC/O2
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
A1875
Figure 6—Electrochemical Sensor Connected to DCU

IMPORTANT
Insulate the shields to prevent shorting to the
device housing or to any other conductor.
Attach the communication module to the standoffs as
shown in Figure 4. Connect the ribbon cable from the
terminal wiring board to the communication module.
Set the address for the device (see “Addressability”on
page 3).
Check the wiring to ensure proper connections, then
pour the conduit seals and allow them to dry (if conduit
is being used).
NOTE
Before placing the cover back on the enclosure fol-
lowing completion of assembly and wiring, inspect
the enclosure O-ring to be sure that it is in good
condition and properly installed. Lubricate the O-
ring and the threads of the cover with a thin coat of
an appropriate grease to ease installation. If the
installation uses catalytic type combustible gas
sensors, it is imperative that lubricants containing
silicone NOT be used, since they will cause irre-
versible damage to the sensor. Place the cover on
the enclosure. Tighten only until snug. Do not
over tighten.
SENSOR SEPARATION FOR DCU WITH H2S AND
O2 SENSORS
Since the transmitter for the electrochemical sensor is
already mounted within the sensor housing, simply
mount the entire sensor assembly to the sensor separa-
tion kit junction box and wire it to terminals 2 and 4
inside the DCU, the same as a regular (without sensor
separation) installation. Connect the shield to the
ground terminal in the DCU junction box.
Refer to Table 1 for separation distance limitations for
H
2
S/toxic/O
2
sensors.
EQ2200DCU DIGITAL COMMUNICATION UNIT
USED WITH POINTWATCH
Determine the best mounting locations for the detectors.
Whenever practical, detectors should be placed where
they are easily accessible for calibration.
WARNING
Do not apply power to the system with the cover
removed unless the area has been verified to be
free of combustible gases and vapors.
The DCU utilizes the following:
1. A terminal wiring board mounted at the bottom of
the junction box.
2. A communication module mounted above the termi-
nal wiring board using the standoffs provided. See
Figure 4.
Assembly and Wiring Procedure
Attach the PointWatch to the DCU enclosure. Do not
over-tighten. If a sensor separation kit is used, attach
the sensor to the separation kit junction box and wire the
device as described in the “Sensor Separation”section.
Refer to the PointWatch manual (form 95-8440) for com-
plete installation and application information.
Refer to Figure 7 when wiring a PointWatch IR gas
detector and a DCU. The wiring code for PointWatch is:
Red = + (24 vdc)
Black = –(common)
White = 4 to 20 ma signal
Yellow = Calibration input
Green = Chassis ground
IMPORTANT
Insulate the shields to prevent shorting to the
device housing or to any other conductor.
Set the address for the device (see “Addressability”on
page 3).
Sensor Separation for DCU with PointWatch
Shielded four wire cable is recommended for connect-
ing the detector junction box to the DCU. Cable with a
foil shield is recommended. The shield of the cable
should be open at the detector junction box and con-
nected to earth ground on the DCU junction box.
NOTE
To ensure proper operation, a minimum of 18 vdc
(including ripple) must be maintained at the PointWatch.
5 90-1118
Table 1—Maximum Separation Distances —
Electrochemical Sensor to DCU
Wire Size Maximum Wiring Distance
Feet Meters
18 AWG (1.0 mm2)* 5700 1750
16 AWG (1.5 mm2)* 9000 2800
* Approximate Metric Equivalent.

EQ2200DCUEX DIGITAL COMMUNICATION UNIT
USED WITH DET-TRONICS COMBUSTIBLE GAS
SENSORS
Determine the best mounting locations for the detectors.
Whenever practical, detectors should be placed where
they are easily accessible for calibration. Always orient
the junction box with the sensor pointing down.
WARNING
Do not apply power to the system with the cover
removed unless the area has been verified to be
free of combustible gases or vapors.
The DCUEX uses the following:
1. The terminal wiring board is mounted at the bottom
of the junction box.
2. The transmitter board is mounted above the termi-
nal wiring board.
3. The communication module is mounted above the
transmitter board.
The boards are connected to each other using the
standoffs provided. See Figure 8.
NOTE
Be sure to note correct orientation of the trans-
mitter board. If the transmitter board is rotated
180° from proper orientation, the device will not
operate correctly — a LON communication fault
will result. See Figure 8.
6
WRONG
COMMUNICATION MODULE
SWITCHES ON SAME SIDE
(RIGHT)
TRANSMITTER BOARD
TERMINAL WIRING BOARD
CORRECT ORIENTATION OF TRANSMITTER BOARD
COMMUNICATION MODULE
SWITCHES ON OPPOSITE SIDES
(WRONG)
TRANSMITTER BOARD
TERMINAL WIRING BOARD
INCORRECT ORIENTATION OF TRANSMITTER BOARD
C1570
COMMUNICATION MODULE
TRANSMITTER BOARD
(DCUEX ONLY)
STANDOFFS (4)
TERMINAL WIRING BOARD
Figure 8—Printed Circuit Boards in Combustible Gas DCUEX
1
2
3
4
5
6
7
8
9
10
YELLOW
WHITE
BLACK
RED
GREEN
DCU POINTWATCH
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
A1876
Figure 7—PointWatch Connected to DCU

Assembly and Wiring Procedure
Connect the external wiring to the appropriate terminals
on the DCU terminal wiring board. See Figure 9.
IMPORTANT
Insulate the shields to prevent shorting to the
device housing or to any other conductor.
Attach the sensor to the DCU enclosure. Do not over-
tighten. If a sensor separation kit is being used, attach
the sensor to the separation kit junction box and wire
the device as described below.
CAUTION
The sensor threads can be coated with an appro-
priate grease to ease both the initial installation
and future replacement of the sensor. Detector
Electronics offers a silicone free grease that is
especially suited for use with catalytic type com-
bustible gas sensors (part number 102868-001).
The use of other lubricants is not recommended,
since some materials can cause irreversible dam-
age to the sensing element. SILICONE based
lubricants or compounds must NEVER be used.
Screw the transmitter board to the standoffs as shown in
Figure 8. Connect the sensor plug to the transmitter
board.
Attach the communication module to the standoffs
mounted on the transmitter board. Connect the ribbon
cable from the terminal wiring board to the communica-
tion module.
Set the address for the device (see “Addressability”on
page 3).
Sensor Separation with DCUEX
If the installation requires mounting the sensor in a dif-
ferent location than the DCUEX, observe the following
guidelines.
When separating a combustible gas sensor from the
DCUEX, two options exist:
1. Preferred Method
Mount the transmitter PC board inside the sensor
separation junction box. This assembly can be
separated from the DCUEX by up to 1000 feet using
three conductor 18 AWG shielded cable.
(Regardless of separation distance, operating volt-
age at the transmitter MUST be at least 18 vdc to
ensure proper operation.) See Figure 10.
Assemble the DCUEX without the transmitter board
similar to the DCU as shown in Figure 4. Plug the
sensor into P2 on the transmitter board. Use a
three conductor 18 AWG shielded cable to connect
P1 on the transmitter board to terminals 2, 3 and 4
on the DCU terminal board (see Figure 10).
Connect the shield to the ground terminal in the
DCUEX junction box.
2. Alternate Method.
If the transmitter board must be mounted separate
from the sensor (high temperature applications,
etc.), separate the sensor only, leaving the transmit-
ter PC board inside the DCUEX enclosure. When
using this installation option, see Table 2 for maxi-
mum wiring distances.
Mount the sensor directly to the separation kit junc-
tion box. Use three conductor shielded cable for
the connection between the terminal block in the
separation kit junction box and P1 on the transmitter
board. A plug with screw terminals is provided for
connecting the cable to P1 on the transmitter board.
Observe the wiring color code. Connect the shield
to the ground terminal in the DCUEX junction box.
7 90-1118
1
2
3
4
5
6
7
8
9
10
SIG
–
+
DCU TERMINAL BOARD DCU TRANSMITTER BOARD1
(MIDDLE BOARD)
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
B1877
NOTES: 1 Catalytic Combustible Gas Sensor
Plugs into Connector Pins on the
Middle Board inside the Junction Box.
2 Connections Wired at the Factory.
2
2
2
Figure 9—DCU Transmitter Board Connected
to Terminal Wiring Board

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.).
Specify:
Enclosure Material: Aluminum or stainless steel
Number of Ports: 5 or 6
Port Size: 3/4 inch NPT or 25 mm
Certification: FM/CSA/CENELEC/CE.
For additional information or for assistance in ordering
a system to meet the needs of a specific application,
please contact:
Detector Electronics Corporation
6901 West 110th Street
Minneapolis, Minnesota 55438 USA
Operator: [phone] or (800) 765-FIRE
Customer Service: [phone]
Fax: [phone]
Web site: www.detronics.com
E-mail: [email protected]
The specifications contained within this document are
subject to change without notice.
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Detector Electronics Corporation
6901 West 110th Street • Minneapolis, Minnesota 55438 • Operator [phone] or (800) 765-FIRE
Customer Service [phone] • Fax [phone] • www.detronics.com • E-mail: [email protected]
SENSOR
CATALYTIC SENSOR
ELECTROCHEMICAL SENSOR
TRANSMITTER BOARD
P1
P2
+
–
4 TO 20
B1878
POINTWATCH
GND
SPARE
CAL
4-20
RET
+24
CHASSIS
CAL
4-20
RET
+24
+
GRN
–
+
GRN
–
NOTE:ALWAYS ORIENT
JUNCTION BOX WITH
CATALYTIC SENSOR
POINTING DOWN.
Figure 10—Sensor Separation Kits
Table 2—Maximum Separation Distances —
Combustible Gas Sensor to DCU (Alternate Method)
Wire Size Maximum Separation Distance
Feet Meters
18 AWG (1.0 mm2)* 40 12
16 AWG (1.5 mm2)* 60 18
14 AWG (2.5 mm2)* 100 30
12 AWG (4.0 mm2)* 150 45
* Approximate Metric Equivalent.