User Manual

Display and operation units

Room thermostats

Flush-mounted

1-62

Siemens Switzerland Ltd

Building Technologies Division

2019www.siemens.com/gamma

Stock No. Product No. DT

S55770-T350 RDF800KN B

RDF800KN Touch screen room thermostat with KNX communications, 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

Data sheet N3174

Operating voltage AC 230 V

Power consumption 6 VA

Setpoint setting range 5...40 °C

Switching differential 0.5…6 K

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

Analog inputs, number 2

Relay outputs Fan: N.O. contacts, non-oating

Valve: N.O. contacts, non-oating

Relay outputs, number 5

Relay output, switching voltage AC 230 V

Relay output, switching current 5 (2) A

Type of xing With screws on recessed round conduit box diame-

ter min. 60 mm

Degree of protection IP30

Dimensions (W x H x D) 86 x 86 x 47 mm

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