Integrates any unit in a big system for control PKEA Server room integrationSmall offices with Domestic indoorsTender for refurbishment (old systems Domestic and VRF in one installation) Current system for PACi / VRF. Central controller can connect to S-link line to control units directly. Request: We want to control RAC unit (which does not have S-link protocol) by Central controllers. It’s necessary to have interface between S-link and RAC protocol to cover basic operating items.  Basic operation itemsON/OFF: YesMode select: YesTemperature setting: YesFan speed: YesFlap setting: YesRemote control prohibit: YesDemand control: NoEconavi ON/OFF: YesExternal inputON/OFF control signal: YesAbnormal stop signal: YesVRF remote control connection: NoProhibit, Mode change: NoExternal output for RelayOperation status (ON/OFF): YesAlarm status output: YesExternal heater control output: No Because current CN-CNT connector can not provide the power for external output relay, additional power input for external relay is necessary.​​​​​​​