Greystone Energy Systems CDD3 Series Catalog Page
CARBON DIOXIDE (CO2) DETECTORS
w/ BACnet® or ModBus
Communications
CDD3 Series
Precision carbon dioxide
control/sensing
FEATURES:
• BACnet® or ModBus Communication
• BTL Listed (B-ASC)
• Optional RH and/or Temperature
• Optional Setpoint and/or Override
Optional on-board relay
•
• Optional LCD display
• Custom logos available
Peace of mind
through reliable
gas monitoring
GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM
CO
DETECTOR w/ BACnet® or ModBus Communications
2
SPECIFICATIONS:
General Specications:
Power Supply........................................................................20-28 Vac/dc (non-isolated half-wave rectied)
Consumption........................................................................
Protection Circuitry.............................................................Reverse voltage protected, overvoltage protected
Operation Conditions........................................................0˚-50°C (32˚-122°F), 0-95% RH non-condensing.
Sensor Coverage Area .......................................................100 m² (1000 ft²) typical
Wiring Connections............................................................
External Dimensions ..........................................................Space:
Duct: 145mm W x 100mm H x 63mm D (5.7” x 3.95” x 2.5”)
Duct Probe: 177mm (7“) long x 25.4mm (1”) diameter
Enclosure Ratings................................................................Space: IP30 (NEMA 1)
Duct: IP65 (NEMA 4X)
CO2 Specications:
Measurement Type .....................................................................Non-Dispersive Infrared (NDIR), diusion sampling
Measurement
Range............................................................0 - 2000 ppm
Standard Accuracy..............................................................±75 PPM @ 1000 ppm @ 22°C (72°F) when compared to certied calibration gas
Temperature Dependence...............................................0.2% FS per °C
Stability...................................................................................2 % FS over life of sensor (15 years typical)
Pressure Dependence........................................................0.13% of reading per mm Hg
Altitude Correction.............................................................Programmable from 0-5000 ft via keypad
Response Time......................................................................<2 minutes for 90% step change typical
Warm-up Time......................................................................<2 minutes
BACnet® Interface:
Hardware................................................................................2-wire RS-485
Software..................................................................................Native BACnet® MS/TP protocol
Baud Rate...............................................................................Locally set to 9600, 19200, 38400 or 76800
MAX Address Range...........................................................Locally set to 0-127 (factory default is 3), (63 devices max on one daisy chain)
80 mA max @ 24Vdc, 140 mA max @ 24Vac with all options
Screw terminal block (14 to 22 AWG)
84mm W x 119mm H x 29mm D (3.3” x 4.7” x 1.15”)
Modbus Interface:
Hardware................................................................................2-wire RS-485
Software..................................................................................Native ModBus MS/TP protocol (RTU or ASCII)
Baud Rate...............................................................................Locally set to 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800 or 115200
MAX Address Range...........................................................Locally set to 0-64 (factory default is 1), (32 devices max on one daisy chain)
Optional Temperature Signal:
Sensing Element..................................................................
Resolution .............................................................................
Range ......................................................................................
10K thermistor, ±0.2˚C (±0.2 °C)
0.1˚C (0.2˚F)
0˚ to 35˚C (32˚ to 95˚F)
Optional Humidity Signal:
Sensing Element..................................................................
Thermoset polymer based capacitive
Accuracy ................................................................................± 2% RH
Range.......................................................................................
Resolution .....................................................................................
0 - 100% RH, non-condensing
1% RH
Hysteresis...............................................................................± 3% RH
Response Time .....................................................................
Stability...................................................................................
15 seconds typical
± 1.2% RH typical @ 50% RH in 5 years
Optional Relay Output:
Contact Ratings....................................................................
Relay Trip Point.....................................................................
Relay Hysteresis ...................................................................
Form A contact (N.O.), 2 Amps @ 140 Vac, 2 Amps @ 30 Vdc
Programmable 500-1500 ppm via BACnet® or Modbus
Programmable 25-200 ppm via BACnet® or Modbus
Optional LCD Display:
Resolution..............................................................................
Size............................................................................................
Backlight.................................................................................
1 ppm CO2, 1% RH, 1˚C (1˚F)
1.4” w x 0.6” h (35 mm x 15 mm) alpha-numeric 2 line x 8 character
Enable or disable via keypad
Optional Setpoint Adjustment...................................
Optional Manual Override ..........................................
Front panel
push-button available as BACnet® object or ModBus register
Front panel push-buttons
available as 0 to 100% as BACnet® object or ModBus register
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BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or test products
for compliance with ASHRAE standards. Compliance of listed products to requirements of ASHRAE
Standard 135 is the responsinility of the BACnet International. BTL is a registered
trademark of the BACnet International
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