The DeltaSol® MX Plus is a versatile multifunction controller with an integrated web server. Configuration, function control and access to VBus.net can be carried out easily and conveniently on any mobile device via a Web interface. Interfaces such as LAN and Modbus RTU (optional) as well as WLAN functionality and a WLAN access point offer many connectivity options.
| Comparison | DeltaSol® MX | DeltaSol® MX Plus |
|---|---|---|
| Inputs | ||
| Temperature sensor inputs | 12 | 15 |
| Impulse inputs | 3 | 4 |
| Frequency inputs | 1 | 2 |
| CS10 irradiation sensors | 1 | 1 |
| Analogue inputs for VFS/RPS Grundfos Direct Sensors™ or FRH humidity sensors | 2 | 2 |
| Digital inputs for VFD/RPD Grundfos Direct Sensors™ or FRHd humidity sensors | 2 | 2 |
| Input for central outdoor sensor unit | - | 1 |
| Outputs | ||
| Semiconductor relays | 13 | 13 |
| Potential-free relay | 1 | 1 |
| Potential-free low voltage relay | - | 1 |
| PWM outputs (convertible to 0-10 V signal outputs) | 4 | 4 |
| Interfaces | ||
| VBus® | ![]() | ![]() |
| SD card slot | ![]() | ![]() |
| LAN | -* | ![]() |
| WLAN | -* | ![]() |
| Modbus/RTU | - | ![]() |
| Communication protocols | ||
| Modbus/RTU | - | ![]() |
| Modbus/TCP | -* | ![]() |
| BACnet/IP | -* | ![]() |
| Functions/Features (examples) | ||
| Extended optional functions, e.g. solid fuel boiler function with mixer and target temperature control | ![]() | ![]() |
| Cooling over the heating circuit with condensation detection | ![]() | ![]() |
| Dew point calculation by means of the FRH(d) humidity sensor to avoid condensation | ![]() | ![]() |
| Remote access to the heating circuits with room control unit(s) or the VBus®Touch HC App | ![]() | ![]() |
| Heat pump demand (optional) | ![]() | ![]() |
| Web interface | -* | ![]() |
| Single-value parameterisation via web interface | - | ![]() |

Sensor and relay extension module with 5 outputs and 6 inputs

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

Room control unit for connection to the DeltaSol® MX (from version 2.0) or DeltaTherm® HC (from version 1.09) and DeltaTherm® HC MAX

FRH Humidity sensor (analogue) » incl. JST connection cable

Room control unit