User Manual

7-4

Siemens Switzerland Ltd www.siemens.com/gamma 2019

Building Technologies Division

Heating, ventilation and air-conditioning – room temperature control

Overview and selection guides

Demand driven primary control

Central collection of heating and cooling demands from rooms

The central control unit RMB795B-1 collects the heating and cooling demands from different devices/room controllers and forwards the calcu-

lated demands to the primary controller (producer).

The RMB795B-1 further supplies the room controllers with the following information:

• Time controlled operating mode for room groups

• Room group set points

• Adjustment of the room groups set point

• Emergency and application operating modes

• Device monitoring

Note:

The KNX room controllers must be able to send every 15 minutes a 1-Byte control or request signal on the bus.

RoomsCollectionProducer

Central control unit for

Room controller and

Room thermostats

RDG100KN, RDG160KN,

RDG165KN, RDG405KN

RXB21.1, RXB22.1,

RXB24.1, RXB39.1

RDF600KN, RDF600KN/S

RDF800KN

UP 227, UP 237K,

UP 254K

UP 204

KNX

0-10 V

0 / I

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