Controller
ST-976

Controller
ST-976K

Controller
ST-976G

Controller
ST-976D

Controller
ST-7111

Controller ST-
976 PID+STB

Power supply

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CH pump

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DHW pump

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Auxiliary pump 1

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–

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Auxiliary pump 2

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Mixing valve

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Mixing valve 1

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Mixing valve 2

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Automatic cleaning

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Thermistor

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STB sensor

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CO temperature sensor

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HUW temperature sensor

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Valve temperature sensor

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Return temperature sensor

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Outdoor temperature sensor

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Exhaust gas sensor

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Temperature sensor C1

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Temperature sensor C2

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Room controller

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Additional Hall Sensor

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Exhaust fan

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Buffer handling

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Control via internet

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Display selection

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DIN rail mounting

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Power switch outside the module

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