This memory card is proposed as an option available for Modicon M221 and M221 Book logic controllers. It s used for backing up and transferring applications, loading firmware, data logging. It is also used for duplicating applications between controllers. It has 256 MB capacity. Specifications Main Range of Product Modicon M221 Modicon M251 Modicon M241 accessory / separate part type SD card Product Compatibility Logic controller Range Compatibility Modicon M241 Modicon M221 Modicon M251 Memory type Flash memory capacity 256 MB Accessory / separate part category Separate parts Complementary Product Specific Application Program transfer Application backup MTBF reliability 3000000 H Data retention time 10 year(s) 77 °F (25 °C) Number of read/write cycles 100000 Net Weight 0.01 lb(US) (0.004 kg) Environment Ambient Air Temperature for Operation 14…158 °F (-10…70 °C) Ambient Air Temperature for Storage -13…185 °F (-25…85 °C) Resistance to electrostatic discharge 15 kV in air IEC 61000-4-2 4 kV on contact IEC 61000-4-2 Vibration resistance 1 gn IEC 61131-2 2007 Shock resistance 15 gn IEC 61131-2 2007 Relative humidity 0…95 % without condensation