DET-TRONICS®

DET-TRONICS®
DET-TRONICS
®
SPECIFICATION DATA
Eagle Quantum™
Digital Communication Unit
EQ2200DCU
APPLICATION
The Eagle 2000 Digital Communication Unit (DCU)
offers a convenient and economical means of obtaining 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 terminal 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/transmitters. The DCU can also be used with a wide variety 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
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.
• Ten bit signal resolution capability
• Two alarm setpoints
• Non-volatile memory for logging of alarm and calibration events
• Non-intrusive one person calibration
• LED for calibration, fault and alarm status annunciation
• EMI hardened
• Screw terminal connectors.
©Detector Electronics Corporation 2001
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).
10/01
90-1118-01
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:
0.28
(0.71)
3.4
(8.6)
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.
5.2
(13.2)
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:
4.7
(11.8)
2.7
(6.8)
Conforms to all relevant European norms.
SHIPPING WEIGHT—
Aluminum:
6 lb (2.7 kg)
Stainless Steel:
10 lb (4.5 kg).
0.32 (0.81) OVAL SLOT MOUNTING
(TYPICAL FOUR PLACES)
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 indicating LEDs that are visible through a viewing window on
the enclosure cover, and supports single person nonintrusive calibration with a Det-Tronics gas sensor.
6.6
(16.8)
DETECTOR ENCLOSURE
The NEMA 4X explosion-proof aluminum enclosure is
designed for use in hazardous locations. The removable cover is furnished with a window for viewing the
status indicator LEDs.
1.28
(3.25)
A2045
Figure 1—Dimensions of DCU Enclosure in Inches (Centimeters)
STATUS LEDS
Three LEDs are provided for indicating detector status conditions. The LEDs are located on the communication 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.
2
CALIBRATION LOG
1
3
4
5
6
7
8
OPEN
BINARY
VALUE
1
2
4
8
16 32 64 128
1
2
3
4
OPEN
}
Each time the sensor attached to the DCU is calibrated, the zero and span levels as well as the time and
date of the calibration are recorded. The initial calibration is kept for the life of the sensor, and all subsequent 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 initial calibration to later ones to produce a “sensor sensitivity 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.
2
LEAVE IN
OPEN POSITION
NODE ADDRESS EQUALS THE ADDED VALUE
OF ALL CLOSED ROCKER SWITCHES
OPEN = OFF
CLOSED = ON
A1557
Figure 3—Field Device Address Switches
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.
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 onboard software and hardware, the module can determine when network integrity has been compromised.
Corrective action is taken by electrically disconnecting the faulty segment of network wiring and properly
terminating the “good” side of the network. This automatic “reconfiguration” changes the topology of the
network from a ring that starts and ends at the gateway to a linear bus network that is properly terminated
on either side of the isolated faulty network segment.
REED SWITCH
A magnetic reed switch, located on the terminal
board, enables calibration of the sensor without opening the enclosure. The switch is activated by placing
a magnet on a specified location on the side of the
enclosure.
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).
INSTALLATION
The detectors are wired on a digital communication
loop starting and ending at the gateway, using communication grade shielded twisted pair wire. Wiring
for power, inputs and outputs must be 18 AWG minimum.
CONDITION A
(OPEN OR SHORT)
CONDITION B
(OPEN OR SHORT)
LCU
B1544
Figure 2—Communication by means of the Digital Highway
3
90-1118
NOTE
Refer to the Eagle Quantum system manual,
form number 95-8470, for complete instructions
regarding wiring and installation.
COMMUNICATION MODULE
EQ2200DCU DIGITAL COMMUNICATION UNIT USED
WITH DET-TRONICS H2S/O2 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.
STANDOFFS (4)
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.
TERMINAL WIRING BOARD
A1571
The DCU utilizes the following:
Figure 4—Printed Circuit Boards in Universal DCU
1.
A terminal wiring board mounted at the bottom of
the junction box.
2.
A communication module mounted above the terminal wiring board using the standoffs provided. See
Figure 4.
CAUTION
The sensor threads can be coated with an appropriate grease to ease installation. Also lubricate
the cover threads.
Assembly and Wiring Procedure
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.
Attach the sensor to the DCU enclosure. Do not overtighten. 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.
DCU
H2S/TOXIC/O2
POINTWATCH CALIBRATE
1
POINTWATCH CALIBRATE
1
4 TO 20 MA IN
2
4 TO 20 MA IN
2
BLACK
–
3
–
3
RED
+
4
GREEN
A
5
B
6
SENSOR POWER
SENSOR POWER
+
4
A
5
COM 2
COM 2
B
6
7
14
–
COM SHIELD
7
14
–
8
13
–
A
9
12
+
B
10
11
+
COM SHIELD
8
13
–
24 VDC
A
9
12
+
B
10
11
+
24 VDC
COM 1
COM 1
A1726
A1875
Figure 5—Terminal Identification for DCU
Figure 6—Electrochemical Sensor Connected to DCU
4
IMPORTANT
Insulate the shields to prevent shorting to the
device housing or to any other conductor.
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.
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.
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.
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).
The DCU utilizes the following:
NOTE
Before placing the cover back on the enclosure following completion of assembly and wiring, inspect
the enclosure O-ring to be sure that it is in good
condition and properly installed. Lubricate the Oring 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 irreversible damage to the sensor. Place the cover on
the enclosure. Tighten only until snug. Do not
over tighten.
1.
A terminal wiring board mounted at the bottom of
the junction box.
2.
A communication module mounted above the terminal 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 complete installation and application information.
SENSOR SEPARATION FOR DCU WITH H2S AND
O2 SENSORS
Refer to Figure 7 when wiring a PointWatch IR gas
detector and a DCU. The wiring code for PointWatch is:
Since the transmitter for the electrochemical sensor is
already mounted within the sensor housing, simply
mount the entire sensor assembly to the sensor separation 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.
Red =
Black =
White =
Yellow =
Green =
+ (24 vdc)
– (common)
4 to 20 ma signal
Calibration input
Chassis ground
IMPORTANT
Insulate the shields to prevent shorting to the
device housing or to any other conductor.
Refer to Table 1 for separation distance limitations for
H2S/toxic/O2 sensors.
Set the address for the device (see “Addressability” on
page 3).
Sensor Separation for DCU with PointWatch
Shielded four wire cable is recommended for connecting 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 connected to earth ground on the DCU junction box.
Table 1—Maximum Separation Distances —
Electrochemical Sensor to DCU
Wire Size
Maximum Wiring Distance
Feet
Meters
18 AWG (1.0 mm2)*
16 AWG (1.5 mm2)*
5700
9000
1750
2800
NOTE
To ensure proper operation, a minimum of 18 vdc
(including ripple) must be maintained at the PointWatch.
* Approximate Metric Equivalent.
5
90-1118
EQ2200DCUEX DIGITAL COMMUNICATION UNIT
USED WITH DET-TRONICS COMBUSTIBLE GAS
SENSORS
COMMUNICATION MODULE
SWITCHES ON SAME SIDE
(RIGHT)
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.
TRANSMITTER BOARD
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.
TERMINAL WIRING BOARD
CORRECT ORIENTATION OF TRANSMITTER BOARD
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 terminal wiring board.
3.
The communication module is mounted above the
transmitter board.
COMMUNICATION MODULE
G
N
O
R
W
SWITCHES ON OPPOSITE SIDES
(WRONG)
TRANSMITTER BOARD
The boards are connected to each other using the
standoffs provided. See Figure 8.
TERMINAL WIRING BOARD
NOTE
Be sure to note correct orientation of the transmitter 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.
DCU
POINTWATCH
POINTWATCH CALIBRATE
1
YELLOW
4 TO 20 MA IN
2
WHITE
–
3
BLACK
+
4
RED
A
5
GREEN
B
6
INCORRECT ORIENTATION OF TRANSMITTER BOARD
COMMUNICATION MODULE
SENSOR POWER
TRANSMITTER BOARD
(DCUEX ONLY)
STANDOFFS (4)
COM 2
TERMINAL WIRING BOARD
7
14
–
8
13
–
9
12
+
10
11
COM SHIELD
C1570
24 VDC
A
Figure 8—Printed Circuit Boards in Combustible Gas DCUEX
COM 1
B
+
A1876
Figure 7—PointWatch Connected to DCU
6
Screw the transmitter board to the standoffs as shown in
Figure 8. Connect the sensor plug to the transmitter
board.
Assembly and Wiring Procedure
Connect the external wiring to the appropriate terminals
on the DCU terminal wiring board. See Figure 9.
Attach the communication module to the standoffs
mounted on the transmitter board. Connect the ribbon
cable from the terminal wiring board to the communication module.
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 overtighten. If a sensor separation kit is being used, attach
the sensor to the separation kit junction box and wire
the device as described below.
Set the address for the device (see “Addressability” on
page 3).
Sensor Separation with DCUEX
CAUTION
The sensor threads can be coated with an appropriate 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 combustible gas sensors (part number 102868-001).
The use of other lubricants is not recommended,
since some materials can cause irreversible damage to the sensing element. SILICONE based
lubricants or compounds must NEVER be used.
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 voltage at the transmitter MUST be at least 18 vdc to
ensure proper operation.) See Figure 10.
DCU TRANSMITTER BOARD1
(MIDDLE BOARD)
DCU TERMINAL BOARD
POINTWATCH CALIBRATE
If the installation requires mounting the sensor in a different location than the DCUEX, observe the following
guidelines.
1
4 TO 20 MA IN
2
–
3
+
4
A
5
B
6
2
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.
SIG
2
–
SENSOR POWER
2
+
COM 2
2.
7
14
–
8
13
–
If the transmitter board must be mounted separate
from the sensor (high temperature applications,
etc.), separate the sensor only, leaving the transmitter PC board inside the DCUEX enclosure. When
using this installation option, see Table 2 for maximum wiring distances.
COM SHIELD
24 VDC
A
9
12
+
B
10
11
+
Alternate Method.
COM 1
Mount the sensor directly to the separation kit junction 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.
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.
Figure 9—DCU Transmitter Board Connected
to Terminal Wiring Board
7
90-1118
ORDERING INFORMATION
When ordering, please specify:
+
–
N
GR
EQ2200DCU Ex - Eagle Quantum Digital Communication Unit for combustible gas sensors
+
–
N
GR
EQ2200DCU Uni - Eagle Quantum Digital Communication Unit for 4-20 ma input from a variety of input
devices (PointWatch, toxic sensors, pressure, flow,
etc.).
ELECTROCHEMICAL SENSOR
SPARE
Specify:
Enclosure Material:
Number of Ports:
Port Size:
Certification:
CHASSIS
CAL
4-20
4-20
RET
RET
+24
+24
For additional information or for assistance in ordering
a system to meet the needs of a specific application,
please contact:
GND
CAL
Aluminum or stainless steel
5 or 6
3/4 inch NPT or 25 mm
FM/CSA/CENELEC/CE.
Detector Electronics Corporation
6901 West 110th Street
Minneapolis, Minnesota 55438 USA
Operator: (952) 941-5665 or (800) 765-FIRE
Customer Service: (952) 946-6491
Fax: (952) 829-8750
Web site: www.detronics.com
E-mail: detronics@detronics.com
POINTWATCH
P1
The specifications contained within this document are
subject to change without notice.
+
–
TRANSMITTER BOARD
4 TO 20
Table 2—Maximum Separation Distances —
Combustible Gas Sensor to DCU (Alternate Method)
P2
Wire Size
NOTE: ALWAYS ORIENT
JUNCTION BOX WITH
CATALYTIC SENSOR
POINTING DOWN.
18 AWG (1.0 mm2)*
16 AWG (1.5 mm2)*
14 AWG (2.5 mm2)*
12 AWG (4.0 mm2)*
SENSOR
B1878
CATALYTIC SENSOR
Maximum Separation Distance
Feet
Meters
12
18
30
45
* Approximate Metric Equivalent.
RED BY UL AN
D
STE
B
GI
SI
RE
Figure 10—Sensor Separation Kits
40
60
100
150
S
RM
FI
E RE D F
T E ED
R
82
6
.A
I
I
R EG
ST
O
REG
N
IR M
ISO 9001
230
5 • N O.
25
Detector Electronics Corporation
6901 West 110th Street • Minneapolis, Minnesota 55438 • Operator (952) 941-5665 or (800) 765-FIRE
Customer Service (952) 946-6491 • Fax (952) 829-8750 • www.detronics.com • E-mail: detronics@detronics.com
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