This Modicon MCM safety controller CPU is supplied with 24Vdc, has 8 safe digital inputs, 4 start/restart interlock inputs, 4 single channel OSSD, 4 test outputs, 4 configurable status outputs, fitted with captive spring clamp terminals. It embeds a Mini USB 2.0 connector to receive the configuration done with the software EcoStruxure Machine Expert - HVAC. It is an appropriate solution for machines with a small number of safety functions requiring the configuration flexibility of a safety controller. It can be used as standalone or with fourteen expansion modules. The system is expandable up to 128 inputs, 16 outputs and up to 32 diagnostic status outputs, ideal for machines requiring multiple safety function monitoring. This safety controller CPU figures LEDs on its front face, displaying the status (power supply, run, internal or external errors, inputs status, communication, master enable, restart signal, output channels). It is a CPU with a rated supply voltage of 24V DC and a maximum power dissipation of 3W. It is furnished with spring clamp terminals, removable terminal block for electrical connection. It is an IP20 rated product. It weighs 0.25kg. Its dimension are 22.5mm (Depth), 99mm (Height) and 114.5mm (Width). Its housing is red. It is powered with 24 VDC. It is ideal for monitoring safety functions such as emergency stop, guard monitoring, perimeter guarding, position monitoring, speed monitoring and enabling movement. The safe controller CPU Modicon MCM are certified by TüV SÜD meeting the industrial safety standards of Category 4, PL e according to EN/ISO 13849-1 and SILCL 3 according to IEC/EN 61508 and IEC/EN 60261. Compatible accessories for Modicon MCM module are a memory card and the backplane connector. The safety controller CPU instals on Omega 35mm DIN rail conforming to EN 50022. The Modicon MCM modular safety controller system provide flexibility and scalability from 8 inputs, 2 dual/4 single channel outputs up to 128 inputs, 16 dual/32 single channel outputs, up to 32 or 48 diagnostic status outputs. Modicon MCM modular safety controller system are designed to monitor multiple safety functions on and around a machine to minimise the risk of people accessing the dangerous moving parts of the machine.