Touch screen room thermostat with KNX communications, for 2-/4- pipe fan coil, universal applications or compressors in DX-type equipment (for China frames)

Stock no. S55770-T335

Stock no. S55770-T335

Touch screen room thermostat for 2-/4-pipe fan coil, universal applications or compressors in DX-type equipment (for China frames)

  • KNX communications

  • Operating modes: Comfort, Economy and Protection

  • For heating and/or cooling applications

  • 2 or 3-position control outputs

  • Output for 1-speed or 3-speed fan

  • 2 multifunctional inputs for keycard contact, external room / return air temperature (QAH11.1, QAA32), heat / cool changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact, presence detector

  • Automatic or manual heating/cooling changeover

  • Adjustable commissioning and control parameters

  • Minimum and maximum setpoint limitation

  • Color of housing: Ivory white

  • Backlit display

  • Mounting on chinese mounting frames

Application selectable:

  • 2-pipe system

  • 2-pipe system with electrical heater

  • 4-pipe system




Semiflush Mount

Backlit display


Fan control

Automatic, Manual, No

Operating voltage

AC 230 V


50/60 Hz

Power consumption

6 VA

Positioning signal

2-position, 3-position

Control algorithm

2-point / PI

Ambient temperature, operation

0...50 °C

Setpoint setting range

5...40 °C

Measuring range, temperature

0…49 °C

Switching differential

0.5…6 K


Bus: KNX (S-mode and LTE mode with Synco 700)

Analog inputs

External room / return air temperature, Heat / Cool changeover, Operation mode changeover, Window contact on/off, Dewpoint monitor, Electrical heater enabled, Monitor input, Fault input

Analog inputs, number


Analog input, signal

NTC 3k , Switch

Relay outputs

Fan: N.O. contacts, non-floating, Valve: N.O. contacts, non-floating

Relay outputs, number


Relay output, switching voltage

AC 230 V

Relay output, switching current

5 (2) A


Rectangular counduit box BS4662 (ARG71) with fixing center of 60.3 mm and on chinese mounting frames

Type of fixing

Only on China frames

Degree of protection


Dimensions (W x H x D)

82 x 82 x 47 mm