Selangor,Kuala Lumpur (KL),Subang Jaya HONEYWELL TF428WNM/U (WHITE) (Modbus RTU) COMMUNICATING DIGITAL THERMOSTAT (220/230VAC, 50/60HZ) Honeywell - Temperature Display / Controller from Culmi Air-Cond & Refrigeration Parts Supply Sdn Bhd

HONEYWELL TF428WNM/U (WHITE) (Modbus RTU) COMMUNICATING DIGITAL THERMOSTAT (220/230VAC, 50/60HZ)

Note

TF428WNM & TFM428KNM are interchangeable, they do the same thing.

General

The TF428WNM/U communicating thermostat is designed for 3-speed fan and valve control in a fan coil system, including:

 2-pipe cool only/heat only/manual changeover

 4-pipe cool /heat manual / automatic changeover

 Ventilation mode

 Manual or automatic 3-speed fan control

 Water valve on/off control

The TF428WNM/U is available in Modbus RTU protocol and can be easily integrated into building automation system.

Features

 RS485 interface in Modbus RTU slave mode

 Memorized time off

 Cycle Per Hour (CPH)

 Random startup

 LCD display with simple user interface

 Room temperature or setpoint temperature display selectable

 Manual or automatic fan speed selectable

 Temperature units in either °C or °F

 User setting can be stored when power loss

 Freeze protection function available

 Keypad lock options

Specifications

Physical Layer EIA485

Protocol Modbus RTU

Baud rate 4800/9600(Default)/19200

Parity None

Error Checking Mechanism CRC

Rated Power & Frequency 220/230VAC, 50/60Hz

Power consumption <2W

Control PI, On/off output

Accuracy ±1°C at 21°C

Auto Cycle times 100,000 times

Manual Cycle times 10,000 times

Protection class IP20

Set point range 10 ~ 32°C

Display range 0 ~ 37°C

Ambient operating limits 0~ +49°C

Ambient storage limits -30 ~ +60°C

Humidity limits 5~90% RH, non-condensing

Action Type: 1

Pollution Degree 2

Protection against electric shock class Class II

Electronic control software class Class A

Rated Impulse Voltage: 2500V

Maximum Temperature for 155°C

Relay wiring

Wire Sectional area

(Recommendation) 1.0~1.5mm2

Applied altitude up to 2000m above sea level

Rating Capacity

Working current for the whole product : 4(3)A

4A: When the load of the thermostat is resistance

3A: When the load of the thermostat is inductance

For Fan load 3(2)A

3A:when the load is resistance; 2A:When the load is inductance

For Valve load 2(1)A

2A: when the load is resistance;1A: when the load is inductance

The valve need have overtravel-limit organ to turn off the

load.

Replacement For

HONEYWELL T9275A-V1 TERMOSTAT HONEYWELL T9275A-V1 TERMOSTAT

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Selangor,Kuala Lumpur (KL),Subang Jaya - HONEYWELL TF428WNM/U (WHITE) (Modbus RTU) COMMUNICATING DIGITAL THERMOSTAT (220/230VAC, 50/60HZ)

HONEYWELL TF428WNM/U (WHITE) (Modbus RTU) COMMUNICATING DIGITAL THERMOSTAT (220/230VAC, 50/60HZ)