Belimo communication modules feature audible and visual alarms and CAN bus communication, allowing for standalone operation and networking of up to 32 devices. Select models feature relays and analog outputs to control ventilation directly, as well as BACnet MS/TP allowing for integration into a BMS. All communication modules are wired via a daisy chain and are backed by a five-year warranty. Communication modules and relay units are available for applications that require control from centralized locations.