Siemens SIMATIC S7-200 CPU 226 AC/DC/RLY + EM 231 AI Module 231-0HC22-0XA0
Series: SIMATIC S7-200. The S7-200 series has been discontinued, making tested used units increasingly valuable. AI 4 × 12-bit resolution. Processor Model: CPU 226. Dual DB9 communication ports (Port 0 & Port 1).