Johnson Controls TEC2645-4 Catalog Page

Code No. LIT-1900619

TEC2645-4 BACnet MS/TP Networked

Thermostat Controller

with Single Proportional Output

and One-Speed Fan Control

Issued December 1, 2009

TEC2645-4

BACnet® MS/TP Networked Thermostat Controller with Single Proportional Output and One-Speed Fan Control

Description

The TEC2645-4 Thermostat Controller is a BACnet® Master-Slave/Token-Passing (MS/ TP) networked device that provides control of two-pipe fan coils, cabinet unit heaters, or other equipment using a proportional 0 to 10 VDC control input and one-speed fan control. The technologically advanced TEC2645-4 Thermostat Controller features a Building Automation System (BAS) BACnet MS/TP communication capability that enables remote monitoring and programming for efficient space temperature control.

The TEC2645-4 Thermostat Controller features an intuitive user interface with backlit display that makes setup and operation quick and easy. The thermostat controller also employs a unique, Proportional-Integral (PI) control algorithm that virtually eliminates temperature offset associated with traditional, differential-based thermostat controllers.

Refer to the TEC2645-4 BACnet MS/TP

Networked Thermostat with Single Proportional Output and One-Speed Fan Control Product Bulletin (LIT-12011586) for

important product application information.

Features

• BACnet MS/TP communication—provides compatibility with a proven communication network; BACnet MS/TP is widely accepted by Heating, Ventilating, and Air Conditioning (HVAC) control suppliers

• password protection option—protects against unwanted thermostat controller tampering

• backlit Liquid Crystal Display (LCD)— offers real-time control status of the environment in easy-to-read, plain text messages with constant backlight that brightens during user interaction

• proportional 0 to 10 VDC control—offers additional application flexibility by providing more advanced control signals

• single/dual setpoint adjustment—enables user setpoint options to accommodate application

• override interface key—allows easy access for temporarily overriding the unoccupied mode

• simplified setpoint adjustment—enables the user to change the setpoint by simply pressing the UP/DOWN arrow keys

• two configurable binary inputs—provide additional inputs for advanced functions such as remote night setback, service or filter alarms, motion detector, and window status

• over 20 configurable parameters—enable the thermostat to adapt to any application, allowing installer parameter access without opening the thermostat cover

Repair Information

If the TEC2645-4 Thermostat fails to operate within its specifications, refer to the

TEC2645-4 BACnet MS/TP Networked Thermostat with Single Proportional Output and One-Speed Fan Control Installation Instructions (Part No. 24-9890-1028) for

troubleshooting details. For a replacement thermostat, contact the nearest Johnson Controls® representative.

Selection Chart

Code Number Description Applications

TEC2645-4 Networked BACnet MS/TP, Two-Pipe, Proportional

0 to10 VDC Control Output, and One-Speed Fan Control Thermostat

Accessories

Code Number Description

TEC-6-PIR TE-636M-1 SEN-600-4

TE-636S-1 Strap-Mount Temperature Sensor MS-BACEOL-0 RS485 End-of-Line Terminator

1. The TEC-6-PIR Accessory Cover can be used to replace the existing cover on a non-PIR TEC2645-4 Thermostat Controller to provide occupancy sensing

2. Additional TE-636xx-x Series 10k ohm Johnson Controls Type II Thermistor Sensors are available; refer to the TE-6300 Series Temperature Sensors Product

3. Only the occupancy override function can be accomplished using the SEN-600-4 with the TEC2645-4.

The performance specifications are nomina l and conf orm to accep table industr y standar ds. For ap plications a t condition s beyond th ese specification s, consult the local Johnson Controls o ffice. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2012 Johnson Controls, Inc.

capability. Bulletin (LIT-216320) for more details.

Control of Two-Pipe Fan Coils, Cabinet Unit Heaters, or Other Equipment Using a Proportional 0 to 10 VDC Control Input and One-Speed Fan Control

Cover with Occupancy Sensor Duct Mount Air Temperature Sensor Remote Indoor Air Temperature Sensor with Occupancy Override and LED

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TEC2645-4 BACnet® MS/TP Networked Thermostat Controller with Single Proportional

Thermostat Dimensions, in. (mm)

70.0ºF

Room Temp

(125)

3-3/8

(86)

(29)

FIG:dmnsns_2645

Output and One-Speed Fan Control (Continued)

4-15/16

1-1/8

Technical Specifications

TEC2645-4 BACnet MS/TP Networked Thermostat Controller with Single Proportional Output and One-Speed Fan Control

Power Requirements 19 to 30 VAC, 50/60 Hz, 2 VA (Terminals 4 and 5) at 24 VAC Nominal, Class 2 or Safety Extra-Low Voltage (SELV) Analog Output Rating 0 to 10 VDC into 2k ohm Resistance (Minimum) Fan Relay Output Rating 19 to 30 VAC, 1.0 A Maximum, 15 mA Minimum, 3.0 A In-Rush, Class 2 or SELV Auxiliary Output

Rating Binary Inputs Voltage-Free Contacts across Terminal Scom to Terminals BI1, BI2, or UI3 Analog Inputs Resistive Inputs (RS and UI3) for 10k ohm Johnson Controls Type II Negative Temperature Coefficient (NTC)

Wire Size 18 AWG (1.0 mm Diameter) Maximum, 22 AWG (0.6 mm Diameter) Recommended BACnet Standard 32 Devices Maximum; 4,000 ft Maximum Temperature Sensor Type Local 10k ohm Negative Temperature Coefficient (NTC) Thermistor Resolution ±0.2F°/±0.1C° Accuracy ±0.9F°/±0.5C° at 70.0°F/21.0°C Typical Calibrated Temperature Range Backlit Display -40.0°F/-40.0°C to 122.0°F/50.0°C

Minimum Deadband 2F°/1C° between Heating and Cooling Ambient Conditions Operating 32 to 122°F (0 to 50°C); 95% RH Maximum, Noncondensing

Compliance United States UL Listed, File E27734, CCN XAPX, Under UL 873, TemperatureIndicating and Regulating Equipment

Shipping Weight 0.75 lb (0.34 kg)

Triac Output 19 to 30 VAC, 1.0 A Maximum, 15 mA Minimum, 3.0 A In-Rush

Thermistor Sensors

Heating Control 40.0°F/4.5°C to 90.0°F/32.0°C in 0.5° Increments Cooling Control 54.0°F/12.0°C to 100.0°F/38.0°C in 0.5° Increments

Storage -22 to 122°F (-30 to 50°C); 95% RH Maximum, Noncondensing

FCC Compliant to CFR 47, Part 15, Subpart B, Class A

Canada UL Listed, File E27734, CCN XAPX7, Under CSA C22.2 No. 24, Temperature Indicating and Regulating Equipment

Industry Canada, ICES-003

European Union CE Mark, EMC Directive 2004/108/EC Australia and New

Zealand BACnet

International

C-Tick Mark, Australia/NZ Emissions Compliant

BACnet Testing Laboratories™ (BTL) 135-2001 Listed BACnet Application Specific Controller (B-ASC)

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