... current unbalance protection, earth fault/leakage current protection, short circuit protection, underload protection, external fault protection, overvoltage protection ... Main module provides 9 DIs for start, stop and reset etc. signals input. If more DIs are needed, ... load √ √Over current √ √Phase failure √ √Current unbalance √ √Short circuit √ √Earth fault √ √Under load √ √External fault √ √Leakage ...