Solar & system controllers Solar & system controllers

System controller DeltaSol® BX Plus

Menu languages:
  • 8 sensor inputs and 5 relay outputs
  • Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
  • Pre-programmed optional functions such as drainback option, time-controlled thermostat function, thermal disinfection
  • Up to 2 extension modules via RESOL VBus® connectable (21 sensors and 15 relays in total)
  • 2 PWM outputs for speed control of high-efficiency pumps
  • Automatic function control according to VDI 2169: Flow rate and pressure monitoring, warnings for too high ΔT values, interchanged flow and return pipes and night circulation
  • VBus® menu for configuring remote displays, e. g. the SDFK Smart Display
  • Modulating heating control with 0-10 V boiler control (with EM Extension Module)
Automatic function control according to VDI 2169 directive!
rosenthal design

System controller DeltaSol® BX Plus
System controller for 2- and 3-store solar systems incl. PWM adapter cable and SD card
Article-no: 115 001 33 | Price bracket A 397,00 €   Add to wish list

System controller DeltaSol® BX Plus - Full kit
System controller for 2- and 3-store solar systems incl. 5 Pt1000 sensors (2 x FKP6, 3 x FRP6), PWM adapter cable and SD card
Article-no: 115 001 43 | Price bracket A 449,00 €   Add to wish list

The DeltaSol® BX Plus is a system controller for multi-store solar and heating systems. The intuitive commissioning menu leads you through the system configuration by requiring the most important adjustments directly after connecting the controller. For an optimum overview, all sensor and relay allocations are listed in the service menu.

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

Temperature sensor inputs:
8 (94)
Sensor type:
Pt1000, Pt500, KTY
Inputs for Grundfos Direct Sensors™:
Input for CS10 irradiation sensor:
Impulse inputs for V40 flowmeter:
Relay outputs in total:
■ semiconductor relays (speed control):
4 (4)
■ 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:
VDI 2169
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: 8 (9) inputs for Pt1000, Pt500 or KTY temperature sensors, 1 V40 impulse input, inputs for 2 digital Grundfos Direct Sensors™, 1 input for a CS10 irradiation sensor
For the digital inputs, the following sensor combinations are possible:
- 1 x RPD, 1 x VFD
- 2 x VFD, but with different measuring ranges only

Outputs: 4 semiconductor relays, 1 potential-free relay, 2 PWM outputs
PWM frequency: 512 Hz
PWM voltage: 11,0 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
4 (1) A 24 V 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 Y attachment
Standby: 0,76 W
Temperature controls class: I
Energy efficiency contribution: 1 %
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: 60 mA
Functions: system controller for solar and heating systems. functions such as: Δt control, pump speed control, heat quantity measurement, operating hours counter for the solar pump, tube collector function, thermostat function, store loading in layers, priority logic, drainback option, booster function, heat dump function, thermal disinfection function, PWM pump control, function control according to VDI 2169
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: full graphic display, control lamp (directional pad) and background illumination
Operation: 7 push buttons
Ingress protection: IP 20 / IEC 60529
Protection class: I
Ambient temperature: 0...40 °C
Pollution degree: 2
Dimensions: 198 x 170 x 43 mm
  1 system-dependent
  2 via EM Extension Module(s) in total
  4 via convertible impulse inputs
  5 via EM Extension Module(s)

EM extension module
Sensor and relay extension module with 5 outputs and 6 inputs
Article-no: 145 440 80 | A         212,40€  Add to wish list
SP10 Overvoltage protection
Sensor-overvoltage protection
Article-no: 180 110 70 | A         17,50€  Add to wish list
DL3 Datalogger
Datalogger incl. RESOL Service CD, SD card, mains adapter, LAN and VBus® cable
Article-no: 180 009 90 | A         672,00€  Add to wish list
The Internet portal for easy and secure access to your system data
Article-no: 000 000 00         Add to wish list

Product photos

DeltaSol® BX Plus (4179 kB)

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Customised and OEM versions are available on request. Please contact our sales team.
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.