SINAMICS V20 I/O extension module I/O interface: 2 DI, 2 relays SINAMICS V20 I/O expansion module for increasing the number of inputs and outputs on the SINAMICS V20, 400 V inverter. The module can simply be installed on the inverter and provides two additional digital inputs and two relay outputs for it. This means the inverter now has the following inputs and outputs available: 2 analog inputs, 4 digital outputs, 1 analog output. The module has connections on the front and back and can be used in conjunction with other accessories for SINAMICS V20, such as the Smart Access web server module, the BOP, and the BOP interface. This new option extends the functionality of SINAMICS V20 inverters. It can, for example, be used to control several pumps, with one V20 being able to control a maximum of four pumps. SINAMICS – simply my drive!