System controller DeltaSol® SLT

The DeltaSol® SLT effortlessly controls even complex systems and enables adaptation to the individual system requirements. Numerous pre-programmed optional functions such as thermal disinfection or zone loading can be combined and parameterised. It is also possible to directly choose from 27 pre-programmed basic systems. The operation via 2 main buttons and 1 adjustment dial, the Lightwheel®, follows the well-known operating concept. The manual mode and the holiday function can be activated by pressing a single button


4 relay outputs (incl. 1 potential-free extra-low voltage relay)
4 inputs for Pt1000 or Pt500 temperature sensors
Input for 1 analogue Grundfos Direct Sensor™
1 V40 impulse input (also usable as a Pt1000, Pt500 or KTY temperature sensor input)
2 PWM outputs for the speed control of high-efficiency pumps
Numerous pre-programmed optional functions
27 basic system layouts to choose from
Automatic function control according to VDI 2169
MicroSD card slot, LAN interface (optional), mini-USB port
Data logging, easy transfer of controller adjustments prepared and firmware updates via SD card

Inputs: 4 inputs for Pt1000 or Pt500 temperature sensors, 1 analogue Grundfos Direct Sensor™, 1 FlowRotor, 1 V40 impulse input (also usable as a Pt1000, Pt500 or KTY temperature sensor input)
Outputs: 3 semiconductor relays, 1 potential-free extra-low voltage relay, 2 PWM outputs (switchable to 0-10 V)
PWM frequency: 512 Hz
PWM voltage: 10.8 V
Switching capacity:
1 (1) A 240 V~ (semiconductor relay)
1 (1) A 30 V= (potential-free relay)
Total switching capacity: 3 A 240 V~
Power supply: 100 – 240 V~ (50 – 60 Hz)
Supply connection: type Y attachment
0.68 W
1.43 W (LAN)
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®, MicroSD card slot, LAN interface (optional), mini- USB port
VBus® current supply: 60 mA
Functions: operating hours counter, tube collector function, zone loading, heat exchange, speed control, heat quantity measurement, adjustable system parameters and optional functions (menu-driven), balance and diagnostics function, 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 (Lightwheel®)
Operation: 4 push buttons and 1 adjustment dial (Lightwheel®)
Ingress protection: IP 20 / EN 60529
Protection class: I
Ambient temperature: 0 … 40 °C
Pollution degree: 2
Dimensions: 110 x 166 x 47 mm

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