Application

The DNS-24 is suitable for a wide range of space sensing applications, from basic temperature sensing to indoor air quality and occupancy sensing.

The DNS-24 provides mechanical equipment controllers the information needed to drive advanced control algorithms, such as demand control ventilation, for optimum user comfort with minimum energy consumption.

Features

1. Native BACnet firmware allows easy integration into any BACnet system
2. BACnet MS/TP or LINKnet communications
3. Multiple built-in sensor options: Temperature, Humidity, CO2, and occupancy
4. Self calibrating CO2 sensor
5. Programmable (via GCL+ over network), LCD display
6. 4 Programmable buttons (via GCL+ over network)
7. Derived Network Addressing (DNA) for simple integration into a standard network architecture
8. Optional terminal block2 for wiring a remote thermistor to the temperature input
9. Service port
10. Firmware upgrade3 and database load/save over the network

Specifications

-BACnet Device Profile BACnet Application Specific Controller (B-ASC)

-LCD 3-value and various icons (96 total seg-ments) with optional backlighting2

-Push Buttons 4 stylized momentary push buttons

-Temperature Sensor Thermistor input - 10kΩ at 77°F (25°C)

Accuracy: ± 0.36°F from 32-158°F (± 0.2°C from 0-70°C)

Display resolution of 0.1°

Stability 0.24°F over 5 years (0.13°C)

-Humidity Sensor (Optional)Accuracy: ± 3% RH from 20% -80%

RH(linearized accuracy of ± 3% to ± 5% from 0-20% and 80-100% RH)

Stability of < 0.5% RH/yr (typical)

-CO2 Sensor (Optional) Dual Beam, Self Calibrating NDIR Detection

Range: 0-2000 ppm

Accuracy @77°F (25°C):± 50ppm + 2% of value

Temperature Dependence:1 ppm/ °F (2ppm/°C) typical

Pressure Dependence:0.13% of reading per mm Hg

Stability: 20 ppm/year (typical)

-Occupancy Sensor (Optional)Passive infrared motion (PIR) sensor

Range: 5m (16.4 ft.)

Coverage: 100° Horizontal, 80° Vertica

-Technology 32-bit processor with internal A/D, Flash and RAM

-Communications PortsRS-485 Port (up to 76800 bps). BACnet MS/TP and Delta LINKnet protocols supported

-Connectors Screw-type terminal connectors

-Wiring ClassClass 2 / SELV

-Power 24V AC 3 VA

-Ambient 32° to 131°F (0° to 55°C) 10 - 90% RH (non-condensing)

-Dimensions (L x W x H) 4.91” x 3.26” x 1.37” (12.5 x 8.3 x 3.5cm)
*H dimension is maximum for all models. Models without the motion sensor option have a slightly reduced height.

-Listings UL916 UL864 (DNS-24-UL864 only)

-Compliance CE FCC Class B