CD2DTB20R
Details
Details
Duct CO2 Transmitter, 0-2000 ppm, 4-20mA/0-5V/0-10V, 20k Thermistor Temp, Relay
Needs 24 VAC/DC power. Needs self-calibration turned off and a yearly calibration where the space is occupied 24 hours.
Key Features
- Output signal: 4-20mA (3-wire), 0-5V, or 0-10V, field selectable
- Relay: Form A (NO), 2A @ 140 VAC/30 VDC
- UL 2043 / CSA/ULC S142: suitable for use in air handling spaces
Product Specifications
| Manufacturer | Greystone |
|---|---|
| Model | CD2DTB20R |
| Gas detected | Carbon dioxide (CO2) |
| Sensor type | Dual channel non-dispersive infrared (NDIR) |
| Measurement range | 0 to 2000 ppm, adjustable 1000 to 10,000 ppm |
| Sensor accuracy | +/-(30 ppm + 3% of reading) |
| Temperature dependency | +/-1.4 ppm per deg F (+/-2.5 ppm per deg C) |
| Response time | 20 seconds (T63) |
| Warm-up time | 1 minute |
| Sensor life span | Over 15 years |
| Transmitter accuracy | +/-0.25% of span (including linearity, hysteresis, and repeatability) |
| Input voltage effect | Negligible over specified operating range |
| Temp sensor | 20k NTC thermistor, +/-0.36 deg F (+/-0.2 deg C); 2-wire resistive output |
| Temp accuracy | Thermistors +/-0.36 deg F (+/-0.2 deg C) @ 77 deg F (25 deg C) |
| Relay | Form A (NO), 2A @ 140 VAC/30 VDC, 2-wire output; programmable setpoint, hysteresis, and time delay |
| Operating conditions | 32 to 122 deg F (0 to 50 deg C), 0 to 95% RH non-condensing |
| Storage temperature | -40 to 158 deg F (-40 to 70 deg C) |
| LCD | Backlit; ppm (CO2), deg F/C (optional temp); 0 to 10,000 ppm, 32 to 122 deg F (0 to 50 deg C); 1.4 x 0.6 in. (35 x 15 mm), 2-line x 8 character |
| Wiring connections | Screw terminal block (14 to 22 AWG) |
| Output drive @ 24 VDC | Current: 550 ohm max; voltage: 10k ohm min |
| Power supply | 24 VAC +/-10% or 24 VDC +/-20%; SELV (Class 2) supply; non-isolated half-wave rectified |
| Current consumption | 4-20mA output: 75 mA @ 24 VDC, 150 mA @ 24 VAC max; voltage output: 50 mA @ 24 VDC, 100 mA @ 24 VAC max |
| Output signal | 4-20mA (3-wire), 0-5V, or 0-10V, field selectable |
| Protection | Class III; reverse voltage and transient protected |
| UL model | MIAQDTXSC |
| Certification | UL 60730 and CSA E60730 (UL file E539555) |
| UL 2043 / CSA/ULC S142 | Compliant; suitable for use in air handling spaces per NEC Section 300.22(C) |
| Purpose of control | Operating control; Type 1 action; impulse voltage 330V; pollution degree 2 |
| Enclosure | Type 4X and IP65 polycarbonate, UL94-V0 (enclosure and probe), hinged and gasketed cover |
| Dimensions | Enclosure 4.6 x 3.9 x 2.1 in. (116 x 100 x 54 mm); probe 6.0 in. long x 0.88 in. diameter (152 x 22.5 mm) |
| Mounting | Outside of a return air duct with the sampling probe inserted; straight duct at least 5 ft from corners |
| Self-calibration | For spaces that drop to outdoor CO2 levels (about 400 ppm) at least 1 hour per day; for 24-hour occupancy or steady high or low CO2, turn it off and calibrate yearly |
| Calibration kit | CDD1-CALKIT-GS (gas not included) |
| Calibration guarantee | 5 years when inside levels periodically drop to outdoor levels (Greystone terms) |
| Use limits | Indoor air-conditioned spaces; not for life-safety use, explosive or hazardous locations, or as a safety or emergency-stop device |
| EU conformity | CE |
| Country of origin | Canada |