CPM1A Features The CPM1A CPU Units feature a one-piece construction including 10,20,30, or 40 built-in I/O terminals. The following three model groups are available: relay output models, sinking transistor output models, and sourcing transistor output models. Extra I/O Capacity Up to three Expansion I/O Units can be connected to a CPM1A-30CD[]-[](V1) or CPM1A-40CD[]-[](-V1) CPU Unit to add an extra 8 or 20 I/O points for each, for a maximum of up to up to 100 I/O points. Input Filter Function The CPM1A is equipped with a filter function to prevent incorrect operation caused by chatter or noise in the input signal. The User can select an input time constant of 1 ms, 2ms, 4 ms, 8 ms, 32 ms, 64 ms, or 128 ms. Low-maintenance Design Flash memory provides memory backup without a battery Input Interrupts The CPM1A-10CD[]-[](-V1) CPU Units can handle 2 interrupt inputs; the CPM1A-20CD[]-[](-V1), CPM1A-30CD[]-[](-V1), and CPM1A-40CD[]-[](-V1) CPU...