Delta Controls DNT-T221 Installation Manual

Delta Controls DNT-T221 Installation Manual

Network thermostat
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INSTALLATION GUIDE
Product Description
The DNT-T221 BACstat II is an intelligent 4-button room thermostat
with a custom 3-value, 96 segment LCD display that is used with
Delta's product line of BACnet Application Controllers. It has 2 extra
universal inputs, 2 analog and 1 binary outputs and built-in control
applications, and is capable of displaying 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.
also capable of communicating on Delta's proprietary LINKnet
network or directly on
a BACnet MS/TP
to an Application Controller on a LINKnet network it provides
programmable remote sensor and expanded I/O capabilities to the
controller. When connected on an MS/TP network it functions as an
independent BACnet sensor with local control capabilities.
Contents
MODEL NUMBERS & ACCESSORIES............................................................................ 2
PACKAGE CONTENTS ...................................................................................................... 2
OTHER RELEVANT DOCUMENTS................................................................................. 2
IMPORTANT INFORMATION.......................................................................................... 2
PRODUCT SPECIFICATIONS........................................................................................... 2
BOARD LAYOUT................................................................................................................. 4
JUMPERS .............................................................................................................................. 4
MOUNTING .......................................................................................................................... 5
WIRING DIAGRAM ............................................................................................................ 5
POWER.................................................................................................................................. 6
NETWORK CABLING & REQUIREMENTS .................................................................. 6
NETWORK TOPOLOGY.................................................................................................... 7
CAUTIONS & WARNINGS ................................................................................................ 8
COMPLIANCE DECLARATIONS .................................................................................... 8
Document Edition 1.5
Delta Network Thermostat: BACstat II
It is
network.
When connected
DNT-T221 (Rev 2.0)
Document Edition 1.5
Page 1 of 9

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Summary of Contents for Delta Controls DNT-T221

  • Page 1: Table Of Contents

    DNT-T221 (Rev 2.0) Document Edition 1.5 Product Description The DNT-T221 BACstat II is an intelligent 4-button room thermostat with a custom 3-value, 96 segment LCD display that is used with Delta’s product line of BACnet Application Controllers. It has 2 extra...
  • Page 2: Model Numbers & Accessories

    Delta Network Thermostat: BACstat II DNT-T221 (Rev 2.0) Installation Guide Model Numbers Product Number Product Description DNT-T221 Standard Model (with default button icons and no backlighting) DNT-T221B Standard Model (with default button icons, c/w backlighting) DNT-T221-INT International Model (with international button icons and no backlighting)
  • Page 3 Delta Controls Communication Port LINKnet Connection • Communications Speed @ 76,800 bps • Maximum of 12 devices (depending on the controller) BACnet MS/TP Connection • Communications Speed @ 9,600 or 19,200 or 38,400 or 76,800 bps (the default) • Maximum of 99 nodes per MS/TP segment (50 without a repeater) Input (Internal Temperature Sensor) •...
  • Page 4: Board Layout

    Delta Network Thermostat: BACstat II DNT-T221 (Rev 2.0) Installation Guide Weight • 0.1 lb. (50 g.) PCB Board Layout Triac Connector Posts for Network Connector Posts Connector Posts for Outputs & IP3 for 24 VAC Connector Posts for IP2 Input Type Selector...
  • Page 5: Mounting

    BACKPLATE Notes: Note that the DNT-T221 has different wiring connections from the DNS-24 and DNT-T103. If wiring 2 or more outputs, you will need a wire nut to terminate all the outputs to GND. Ensure you use the recommended balanced cable for the network and follow documented RS-485 installation guidelines for MS/TP or LINKnet networks.
  • Page 6: Power

    (which is 0.5 A @ 24 VAC per triac and 20 mA maximum per analog output). Power The DNT-T221 BACstat II requires a 24 VAC @ 4 VA power supply – not including output loading for its internally powered triac – typically an isolated Class II transformer. More than one device – not including DCUs or V2 products –...
  • Page 7: Network Topology

    Delta Controls Network Topology BACstats Configured as MS/TP Subnet Devices With V3.21 firmware or higher, one possible MS/TP network architecture has the MS/TP devices configured as Subnet devices, allowing BACstats to reside on the MS/TP network with other Subnet devices. Note that V3.21 requires a DCU, while V3.22 or higher may use any System Controller instead.
  • Page 8: Cautions & Warnings

    ESD protection (ground strap) should be unnecessary. Compliance Declarations BACnet Testing Labs The DNT-T221 BACstat II product is BTL listed (with at least Release 2 firmware). Refer to http://www.bacnetassociation.org/bacnet_testing.htm for more detailed product listing information.
  • Page 9 Delta Controls CE - DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Delta Controls Manufacturer's Address: 17850 56 Avenue Surrey, British Columbia Canada V3S 1C7 declares that the product (s): Product Name: BACstat II - Analog...

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