2 pairs OSSD Cat. 4 safety outputs (PNP 400 mA) 2 inputs for Start/Restart interlock and EDM 2 status outputs (PNP 100 mA) * MO4 4 pairs OSSD Cat. 4 safety outputs (PNP 400 mA) 4 inputs for Start/Restart interlock and EDM 4 status outputs (PNP 100 mA) * MO4L 4 single OSSD safety outputs or 2 pairs (PNP 400 mA) 4 inputs for Start/Restart interlock and EDM 4 status outputs (PNP 100 mA) MO4L HC S8 - High current output units * 4 single channel or 2 pairs OSSD Cat. 4 safety outputs (PNP 2,0 A) * 4 inputs for Start/Restart interlock and EDM * 8 status outputs (PNP 100 mA)