... integrates measurement,protection,and control functions. RS485/ Modbus,optional Profibus module. 1. Use module framework. Several modules can be selected flexibly. ... autotransformer starter etc motor starting control modes. 5. Main module provides 9 DIs for start, stop and reset etc. ... action. If more DOs are needed, an extended digital module can be selected. Some of the DOs are programmable. ...