Delta DNT-T221 Installation Manual page 3

Communication Port
LINKnet Connection
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Communications Speed @ 76,800 bps
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Up to 12 Devices per segment (depending on the controller), only two of which can be DNT or DFM
devices
BACnet MS/TP Connection
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Communications Speed @ 9,600 or 19,200 or 38,400 or 76,800 bps (the default)
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Maximum of 99 nodes per MS/TP segment (50 without a repeater)
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Firmware can be flash loaded over the network
Temperature Sensor (IP1)
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Thermistor Input – 10,000 ohm @ 77 ºF (25 ºC)
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Accuracy of +/- 0.36 ºF from 32 - 158 ºF (+/- 0.2 ºC from 0 - 70 ºC)
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Display Resolution of 0.1 ºF or ºC
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Stability of 0.24 ºF over 5 years (0.13 ºC)
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Optional Termination point for an External Thermistor on Input 1
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Jumper Selectable for Internal or External Thermistor
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Use a standard 10 KΩ Thermistor (10,000 ohm @ 77 ºF / 25 ºC)
Humidity Sensor (DNT-H121B Model Only)
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Accuracy of +/-2% RH from 0-100% RH (25ºC, V
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Display Resolution of 0.1 %
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Stability of +/- 1% RH typical @ 50% RH over 5 years
*Note:Extended exposure to >90% RH causes a reversible shift of 3% RH
Inputs (Additional)
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2 Universal Inputs (10 bit), jumper configurable for the following input types:
0-5 VDC
0-10 VDC
10 KΩ Thermistor
Dry Contact (using 10 KΩ Thermistor jumper setting)
Outputs
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2 Analog Outputs
0-10 vdc @ 20 mA maximum per output
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1 Binary Triac Output
Switching 24 VAC @ 0.5 Amp maximum per output
Leakage Current per Triac is 100 µA
Internally Powered with 24 VAC (so an external power source should not be used)
Software Configurable for Binary, PWM, Time Proportioned
Technology
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32-bit Processor with internal A/D, Flash and RAM
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3-value LCD with icons (96 total segments) and optional backlighting
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4 stylized momentary push buttons with tactile feedback
Document Edition 1.8
= 2.6Vdc)
SUPPLY
Delta Controls
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