CALEC ST II

CALEC® ST II Multi-protocol heating / cooling energy calculator For heating, air-conditioning, refrigeration or systems with thermal alternative energy. The CALEC® ST II is used for energy metering in split systems which are equipped with passive or active pulsed flow meters and 2-wire or 4-wire Pt100 or Pt500 temperature sensors. Integrated power supplies for flow transmitters simplify the connection of flow meters and make it easy to select the appropriate application for water and other heating or cooling media. The CALEC® ST II is fitted with two separate interfaces for data transfer to higher-level systems. These two interfaces can be configured as M-Bus, LON TP-FT10, Modbus RTU, N2Open, BACnet MS/TP and KNX TP1, or any combination of the above. For parameterizing and configuration purposes, there is integrated an optical M-Bus Interface.