Product overview 33.1 What is SIMATIC TOP connect system cabling?IntroductionSIMATIC TOP connect system cabling is an efficient way to connect the I/O modules (inputand output modules) of the SIMATIC controller S7-300 and ET 200M I/O modules. SIMATICTOP connect uses standardized connectors and reduces the wiring work required.There are two types of connection:● Fully modular connection:for connecting sensors and actuators in the field.The fully modular connection replaces the previously used terminal strips.● Flexible connection:for simple wiring inside the control cabinet.Area of applicationSIMATIC TOP connect allows you to wire actuators and sensors "locally" to one or moreterminal modules. Connection to the I/O modules takes place via connecting cable.Figure 3-1 SIMATIC TOP connect with an S7-300System cabling for S7-300Manual, 09/2018, 70327045899 11