9 Digital inputs (NPN / PNP) _ 6 Digital Outputs (PNP), Modular connectivity (Max. 16 devices / 268 I/O ports) _ Built-in calendar-clock (RTC), IPERTU-SPP3P1-30-00-51-00_1 Digital Input - Transistor Output Slim Plus PLC CPU Modules, Data logging via USB_ Ethernet 10/100 Mbit