Spare parts & accessories

rosenthal design 
EM extension module

EM extension module

The EM extension module can be connected to the DeltaSol® MX, DeltaSol® BX Plus, DeltaSol® SLT or to the DeltaTherm® HC/HC MAX and provides 5 additional relay outputs and 6 additional sensor inputs. The EM can be used for all optional functions of the above mentioned controllers and can also control a heating circuit. With 5 extension modules and its 2 internal heating circuits, for example, the DeltaSol® MX can manage no less than 7 heating circuits complete with individual room thermostats.

Sensor and relay extension module with 5 outputs and 6 inputs
Article no.145 440 80 | Price bracket  A | Price on request
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  • Quick access to the manual mode by means of the slide switch
  • For all optional functions of the DeltaSol® MX, DeltaSol® BX Plus, DeltaSol® SLT and the DeltaTherm® HC/HC MAX
  • Easy connection via VBus®
  • Selection and configuration of the functions on the controller
Inputs: for 6 Pt1000, Pt500 or KTY temperature sensors
Outputs: 4 semiconductor relays, 1 potential-free relay
Switching capacity:
1 (1) A 240 V~(semiconductor relay)
4 (1) A 24 V DC/240 V (potential-free relay)
Total switching capacity: 4 A 240 V~
Power supply: 100 – 240 V~ (50 – 60 Hz)
Supply connection: type X attachment
Standby: 0.53 W
Mode of operation: type 1.B.C.Y action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting
Indication/Display: LC display, 7-segment display
Operation: 3 push buttons and 1 slide switch at the front of the housing
Ingress protection: IP 20 / IEC 60529
Protection class: I
Ambient temperature: 0 ... 40 °C
Pollution degree: 2
Dimensions: 144 x 208 x 43 mm


RTA12 Remote control

RTA12 Remote control

Remote control for connection to the HKM3 and DeltaSol® MX, BX Plus, DeltaTherm® HC/HC MAX or EM Extension Module




  Product portfolio (PDF)