That sounds like a job for the PlantComponent:UserDefined (I don't think PlantComponent:TemperatureSource which is simpler would work well).

Take a look at EMSUserDefined5ZoneAirCooled.idf or the Python version PythonPluginUserDefined5ZoneAirCooled.idf + PythonPluginUserDefined5ZoneAirCooled.py