IOU Mix Control Actuator, (Buspro)
https://b2b.hdl-automation.cz/en/support/products/data-sheets/buspro/hotel-system/hdl-mhiou-432-hotel-io-module
https://b2b.hdl-automation.cz/en/support/products/data-sheets/buspro/hotel-system/hdl-mhiou-432-hotel-io-module