INSTALLATION GUIDE
Delta Network Thermostat: BACstat II
DNT-T221 (Rev 4.1)
Document Edition 1.8
Product Description
The DNT-T221 is an intelligent room thermostat with a custom 3-
value, 96 segment, LCD display. The DNT-T221 can communicate on
a BACnet MS/TP network or on Delta’s proprietary LINKnet network.
The DNT-T221 can display a wide-range of digital or analog values,
including setpoints, temperature, air flow, 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, it provides a programmable remote
sensor and expanded I/O capabilities. This version’s firmware can be
flash loaded over the network, and has a termination resistor that is
jumper selectable.
Contents
MODEL NUMBERS............................................................................................................. 2
PACKAGE CONTENTS ...................................................................................................... 2
OTHER RELEVANT DOCUMENTS................................................................................. 2
PRODUCT SPECIFICATIONS .......................................................................................... 2
PCB BOARD LAYOUT........................................................................................................ 4
JUMPERS .............................................................................................................................. 5
MOUNTING .......................................................................................................................... 5
WIRING DIAGRAM ............................................................................................................ 6
POWER.................................................................................................................................. 7
NETWORK CABLING & REQUIREMENTS .................................................................. 7
NETWORK TOPOLOGY.................................................................................................... 8
CAUTIONS & WARNINGS ................................................................................................ 9
COMPLIANCE DECLARATIONS .................................................................................... 9
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