DNT-T221/H121
Description: The DNT-T221 is an intelligent room thermostat with a custom 3-value, 96 segment, LCD display. The DNT-T221 can communicate on Delta’s LINKnet network or directly on a BACnet MS/TP network.
The DNT-T221 can display a wide-range of digital or analog values including setpoints, temperature, airflow, heating and cooling status, fan speed, valve and damper position, and more. When connected on a BACnet MS/TP network, the DNT-T221 functions as an independent BACnet thermostat. When connected to a Controller, on a LINKnet network, the DNT-T221 provides a programmable remote sensor and expanded I/O capabilities.
Features:
- Native BACnet™ firmware
- BACnet MS/TP or LINKnet communications
- Configurable 3-value, 96 segment, LCD display
- 4 Configurable push buttons
- Controller firmware can be flash loaded over the network
- Network termination is jumper selectable on each device
- Derived Network Addressing (DNA) for simple integration into a standard network architecture
- Field selectable applications
- Service port
Application: The DNT-T221 is designed to be a low cost solution for control of unitary equipment. The DNT-T221 has built-in algorithms for configuring VAV, VVT, fan coil/unit ventilator, heat pump, radiation and humidification applications.
The DNT-T221 may also be connected to a LINKnet network to provide remote sensor and expanded I/O capabilities.
Accessories:
- RPT-768—Delta Network Repeater for BACnet MS/TP
- CON-768—Delta Network Converter
Ordering: Order the DNT-T221 with the desired options, according to the following product numbers:
- DNT-T221—Internal Thermistor Input, Additional I/O (2 IP and 3 OP), Backlighting (Option B), External Thermistor Terminator (Option X)
- DNT-H121B—Internal Thermistor Input, Internal Humidity Input, Additional I/O (1 IP and 3 OP), Backlighting, External Thermistor Terminator
An appended button icon code must be included to specify the desired icons embossed on the buttons.
If a button icon code is not specified, the product is shipped with the default button icons.
Default—Bottom 2 buttons are 'down' & 'up' arrows (Setpoint Adjust), top 2 buttons are OFF and ON
INT—Bottom 2 buttons are 'down' & 'up' arrows (Setpoint Adjust), top 2 buttons are O and I (International)
BACnet Device Profile
BACnet Application Specific Controller (B-ASC)
LCD
3-value and various icons (96 total segments) with optional backlighting
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
Accuracy of +/- 3%RH from 20% -80% RH (linearized accuracy of +/- 3% to +/- 5% from 0-20% and 80-100% RH)
Display Resolution of 0.1%
Stability of < 0.5% RH/yr (typical)
Inputs
2 Universal inputs - 10 bit (supporting 0-5v, 0-10v, 10kΩ)*
*Note: the humidity option uses one of the available universal inputs.
Outputs
2 Analog outputs, 0-10VDC @ 20mA maximum
1 Binary triac output (supporting binary, PWM, or tri-state)
Technology
32-bit processor with internal A/D, Flash and RAM
Device Type
Configured as a LINKnet or subnet device
Device Addressing
Set via keypad
Communications Ports
BACnet MS/TP @ 9600, 19200, 38400 or 76000 bps (default) (maximum of 99 devices per BACnet MS/TP segment)
Delta LINKnet @76800 bps (maximum 12 devices, depending on the controller with no more than 2 DFM/DNT devices per LINKnet segment)
Connectors
Screw-type terminal connectors
Wiring Class
Class 2
Power
24V AC
3 VA without output loading or 15 VA maximum
Ambient
32° - 131°F (0° - 55°C)
10 - 90% RH (non-condensing)
Dimensions
5 x 3.25 x 1 in. (12.7 x 8.3 x 2.5 cm) with housing
0.3 lb. (136 g) with housing
Listings
UL 916 Listed
BTL Listed
Compliance
CE
FCC Class B