... universal contro ModelDescriptionECU-321Pi controller,3UI,1 TIinternal,2DO(relay),1A0,MODBUS communicationECU-321LPi controller,3UI,1 TIinternal,2DO(relay ... to be freely assigned· Three inputs for NTC10K temperature sensors, 010V or 420mA analog signals· Unit can ... , walls and in plant rooms.Measurement and control of temperature, relative humidity, absolute humidity, enthalpy, pressure differential, ...