These feature-enhanced CPUs are part of the DirectLogic DL405 programmable logic controller product line. The D4-454 and D4-454DC-1 provide all the capabilities of the D4-430, D4-440 and D4-450 CPUs, using updated microprocessor technology. Both D4-454 CPUs include a built-in power supply and four communication ports. Each CPU offers a large amount of program memory; advanced diagnostics; and an instruction set that includes drum sequencers, ASCII output, floating point math, trig functions, bit of word manipulation, timed and hardware-triggered subroutines, For/Next loops and fill-in-the-blank PID control.
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