Accessories Accessories

HKM3 heating circuit extension module

HKM3 heating circuit extension module The HKM3 heating circuit module enables the control of an additional heating circuit. The controller connected can be extended by a complete weather-compensated heating circuit by connecting the HKM3 via the VBus®. The HKM3 is equipped with 6 sensor inputs, one of which can be used for the optional RTA11-M remote control. For the connection of a mixing valve and a heating circuit pump, 3 semiconductor relays are available, as well as one potential-free relay for afterheating demand. In combination with the controller connected, the HKM3 not only controls the basic functions of the heating circuit and the DHW priority, it also has an antifreeze function and a blocking protection for the heating circuit pump.

design rosenthal
Technical data
Inputs: for 5 Pt1000 temperature sensors and 1 RTA11-M remote control
Outputs: 4 semiconductor relays, 1 potential-free relay
Switching capacities:
1 (1) A 240 V~(semiconductor relay)
4 (1) A 240 V~(potential-free relay)
4 (1) A 24 V DC (potential-free relay)
Total switching current: max. 4 (1) A
Power supply: 100 ... 240 V~, 50 ... 60 Hz
Housing: plastic, PC-ABS and PMMA
Installation: wall mounting
Display: LC display, 7-segment display, operating control lamp
Operation: 3 push buttons at the front of the housing and 1 slide switch
Protection type: IP 20 / IEC 60529
Ambient temperature: 0 ... 40 °C
Dimensions: 144 x 208 x 43 mm
Control range: -40 °C ... +250 °C
Bus: RESOL VBus®
VBus
The number of VBus® accessories that can be connected to one controller depends on the sum of their current consumption and on the current supply of the controller VBus®.
Device Maximum current consumption
VBus®/PWM interface adapter 6,5 mA
VBus®/USB interface adapter 6,5 mA
VBus®/LAN interface adapter 6,5 mA
Datalogger DL2 1,5 mA
Datalogger DL3 VBus® 1-5: 10 mA
VBus® 6: 0.5 mA
Smart Display SD3 17,5 mA
GA3 Large Display 1 mA
AM1 alarm module 16,5 mA
HKM3 1 mA
EM 1 mA
STA-W 12 mA

HKM3 heating circuit extension module
Heating circuit module for a weather-compensated heating circuit
Article-no: 145 440 60 | Price bracket A 205.00 €

HKM3 heating circuit extension module - Full kit
Heating circuit extension module incl. 2sensors Pt1000 (1 x FAP12, 1 x FRP21)
Article-no: 145 440 70 | Price bracket A 254.00 €


The cTuVUS certification confirms that the controller meets the demands of the UL 60730-1A and CSA E60730.1 standards.
The cLCus certification confirms that the controller meets the demands of the UL 60730-2-9 and CSA - E60730-2-9-01 standards.
The cLCus certification confirms that the controller meets the demands of the UL 60730-1A and CSA E60730.1 standards.