Siemens RAA11, S55770-T219 Electromechanical room thermostat, public sector model Heating only or cooling only No operating elements on the front of the unit Datasheet

Siemens RAA21, S55770-T220 Electromechanical room thermostat, basic model Heating only or cooling only Setpoint adjustment with knob Datasheet

Siemens RAA31, S55770-T221 Electromechanical room thermostat with on/off switch Heating only or cooling only Setpoint adjustment with knob On / off switch Datasheet

Siemens RAA31.16, S55770-T222 Electromechanical room thermostat with on/off switch and LED Same functionality as RAA31 plus mode indication (red LED, needed AC 230 V) Datasheet

Siemens RAA31.26, S55770-T223 Electromechanical room thermostat with on/off switch and LED, auxillary switch and LED Same functionality as RAA31 plus 2 mode indications (red LED, needed AC 230 V) Datasheet

Siemens RAA41, S55770-T224 Electromechanical room thermostat with selector heating/off/cooling, 1 output Heating or cooling Setpoint adjustment with knob Switch for cooling / off / heating Datasheet