The MSC-CB-AC-FI8FO2 is a base unit within Euchner's MSC modular safety controller series, providing eight semiconductor safety inputs together with programmable monitoring outputs and test outputs. The monitoring outputs are semiconductor, p-switching types configurable according to EN 61131-2, with a maximum load of 100 mA, while safety outputs switch to a LOW state of 0 to 2 V DC. It is used as the input and logic base for building up safety circuits within a panel, onto which additional MSC modules can be added according to the required configuration.