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DNT-T221/H121B
DNT-T221/H121B

DNT-T221/H121B

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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...

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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.

DNT-T221/H121B

Application

The DNT-T22 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 humidifi

cation applications.

The DNT-T221 may also be connected to a LINKnet

network to provide 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 

Specifications

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 +/-2% RH from 0-100% RH

(25°C, Vsupply = 2.6Vdc)

Display resolution of 0.1%

Stability of +/- 1% RH (typical at 50% RH over

5 years)

Note: Extended exposure to >90% RH causes

a reversible shift of 3% RH 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)