Solar and system controllers Solar and system controllers

Solar controller DeltaSol® MX

Menu languages:
  • 14 relay outputs and 12 inputs for Pt1000, Pt500 or KTY temperature sensors
  • Up to 5 extension modules via RESOL VBus® (45 sensors and 39 relays in total)
  • Inputs for analogue and digital Grundfos Direct Sensors™ as well as 1 FlowRotor
  • Speed control of standard and high-efficiency pumps
  • Data logging, storing and firmware updates via SD memory card
  • Cooling over the heating circuit with condensation detection by means of a dew point switch
  • Simplified timer, 0-10 V boiler control and DHW preheating
  • Basic solar systems also for 3 collector fields
Certified for the North-American market!
rosenthal design
VBus®Touch HC

Solar controller DeltaSol® MX
System controller for solar and heating systems
Article-no: 115 992 07 | Price bracket A

DeltaSol® MX - Full kit
System controller for solar and heating systems incl. 6 sensors Pt1000 (2 x FKP6, 4 x FRP6)
Article-no: 115 992 17 | Price bracket A

The RESOL DeltaSol® MX is a system controller of the latest generation and offers almost boundless possibilities in planning and controlling solar thermal systems. It is equipped with 14 relay outputs and 4 PWM outputs for the speed control of energy-saving high-efficiency pumps. Additionally, the controller has three impulse inputs as well as a range of different sensor inputs. Pre-defined functions allow easier setup of the system; functional additions such as a drainback function extend the range of applications.

Max. number of collector fields:
Max. number of stores:
Weather-compensated heating circuits:
2 (72)
External heat exchanger:
Speed control of standard pumps:
Speed control of HE pumps:
■ via integrated PWM output:
■ via PSW adapter:

Temperature sensor inputs:
12 (154)
Sensor type:
Pt1000, Pt500, KTY
Inputs for Grundfos Direct Sensors™:
analogue, digital
Input for CS10 irradiation sensor:
Impulse inputs for V40 flowmeter:
Relay outputs in total:
■ semiconductor relays (speed control):
13 (13)
■ electromechanical relay:
■ potential-free relay with changeover contact:
■ potential-free relay with normally open contact:
■ potential-free high-current relay:
PWM outputs:
■ convertible to 0-10 V:
Real-time clock:
Data interface:
VBus®, SD card
Energy-efficient SMPS:
Power supply:
100 ... 240 V~

Heat quantity measurement
■ with flowmeter:
■ with V40 flowmeter:
■ with Grundfos Direct Sensors™:

Software functions
Antifreeze function for solar circuit:
Collector minimum limitation:
Collector emergency shutdown:
Store maximum limitation:
Store set temperature:
Store emergency shutdown:
Drainback option:
Tube collector function:
■ with adjustable time frame, interval:
Additional ΔT control:
Thermostat function:
Target temperature:
Heat dump function:
Heat exchange:
Store loading in layers:
Priority loading:
■ Parallel loading:
■ Store sequence control:
■ Progressive loading:
■ Successive loading:
■ Spreaded loading:
Solar circuit bypass:
Irradiation-dependent bypass:
Irradiation switch:
Afterheating suppression:
Parallel relay:
solar, free selectable
Twin pump for solar circuit:
Cooling functions and cooling mode:
Flow rate monitoring:
Pressure monitoring:
Function control:
Error relay:
DHW hygiene functions:
■ DVGW legionella protection:
■ Thermal disinfection:
DHW heating:
Heating circuit return preheating:
Boiler loading/Zone loading:
Solid fuel boiler:
Mixer control weather-compensated:
Mixer control with target temperature:
Function block:
Heating circuit antifreeze function:
Chimney sweeper function for the heating circuit:
Room thermostats:
Inputs: 12 Pt1000, Pt500 or KTY temperature sensor inputs (can optionally be used for remote controls, operating mode switches or potential-free switches), 3 impulse inputs for V40 flowmeters, 1 input for a FlowRotor, 1 CS10 solar cell, 4 Grundfos Direct Sensors™ (2 x analogue, 2 x digital*)
Outputs: 14 relays, 13 of them semiconductor relays for pump speed control, 1 dry-contact relay and 4 PWM outputs (convertible to 0-10 V signal outputs)
PWM frequency: 512 Hz
PWM voltage: 10,5 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
4 (2) A 24 V⎓ / 240 V~ (dry contact relay)
Total switching capacity: 6,3 A 240 V~
Power supply: 100 ... 240 V~, 50-60 Hz
Supply connection: type Y attachment
Standby: 0,82 W
Temperature controls class: VIII
Energy efficiency contribution: 5 %
Mode of operation: type 1.B.C.Y action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®, SD card slot
VBus® current supply: 35 mA
Functions: 7 integrated energy metering modules and control of 2 weather-compensated heating circuits. Adjustable system parameters and add-on options (menu-driven), balance and diagnostics functions, functionality control
Housing: plastic, PC-ABS and PMMA
Installation: wall mounting, mounting into patch panels is possible
Indication/Display: full graphic display
Operation: 7 push buttons at the front
Ingress protection: IP 20 / EN 60529
Protection class: I
Ambient temperature: 0 ... 40 °C / 32 ... 104 °F
Pollution degree: 2
Dimensions: 253 x 200 x 47 mm / 10.1" × 7.9" × 1.7"
  1 system-dependent
  2 via EM Extension Module(s) in total
  4 via convertible impulse inputs

Flowmeter V40
Article-no: 280 011 00 | A
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Product photos

DeltaSol® MX (6835 kB)

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Unit °F and °C selectable! Customized and OEM versions are available on request. Please contact our sales team.
The cTUVus certification confirms that the controller is certified to UL 60730-1A and CSA E60730.1.
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.