The FC6A MicroSmart PLC offers up to 520 I/O. Basic instructions can be executed in 0.042 ms, and program memory is 640 kB. The PLC has 1,024 timers, and six of the 512 counters are high speed at rates up to 100 kHz. Three models are available, each with 24-Vdc or 100-240-Vac input power. The 16 I/O model has nine inputs and seven relay or transistor outputs. The 24 I/O model has 14 inputs and 10 relay or transistor outputs. The 40 I/O model has 24 inputs and 16 relay or transistor outputs. Each model also includes an integral 0-10-Vdc analog input.