This standard supplements DIN EN 60964 (VDE 0491-5-1) which applies to the design for control rooms of nuclear power plants. It identifies the Human Machine Interface (HMI) requirements for discrete controls, multiplexed conventional systems, and soft control systems. DIN EN 60964 (VDE 0491-5-1) includes the relevant general requirements for layout, user needs and verification and validation methods. Also DIN EN 61772 (VDE 0491-5-4) on Visual Display Unit (VDU) application to main control rooms should be read with this standard.