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

Stock no. S55770-T350

Stock no. S55770-T350

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

  • 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

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


Semi Flush-mounting with recessed round conduit box, diameter min. 60 mm, or rectangular counduit box BS4662 (ARG71) with fixing center of 60.3 mm

Type of fixing

With screws on recessed round conduit box diameter min. 60 mm

Mechanical design


Degree of protection


Dimensions (W x H x D)

86 x 86 x 47 mm