Product pictures Product Overview: Emerson EC20-2012BTA Parameter Specification Manufacturer Emerson Order Number EC20-2012BTA Product Name Main control / CPU unit with integrated digital I/O Series / Family EC20 programmable controller — main module group Application & Fault Scenarios Where It Fits: The controlling core of an EC20-based cabinet where a mid-size machine needs a full set of hardwired I/O on the CPU itself — it runs the ladder program, samples 20 field inputs