Specifications Power & Basic Info Controller Type: Logic controller — Modicon M221 series Supply Voltage: 24 V DC (20.4 … 28.8 V) Protection: IP20 (indoor industrial) Mounting: DIN‑rail (TH35) or panel mount Dimensions: ~110 mm × 70 mm × 90 mm Weight: ~0.395 kg I/O & Logic Capabilities Total I/O Points: 24 integrated Digital Inputs: 14 (including 4 fast inputs, HSC up to 100 kHz) Digital Outputs: 10 PNP transistor outputs (including 2 fast outputs) Analog Inputs: 2 inputs 0–10 V (10‑bit) I/O Expansion: Supports TM3 I/O modules (up to 7 local or more remote) Discrete Output Current: 0.5 A per output Logic Function Support: PWM, PLS, frequency generator, high‑speed counting Memory & Performance Application & Data RAM: 256 kB Internal Variables RAM: 256 kB Flash Memory: Built‑in flash for program/data backup (& SD card support up to ~2 GB) Execution Speed: ~0.2 µs per Boolean instruction Real‑Time Clock: Integrated (battery backed) Communication Interfaces USB: Mini‑B programming port (EcoStruxure Machine Expert Basic) Serial: Two RJ45 ports supporting RS232/RS485 for Modbus RTU/ASCII and SoMachine‑Network protocols SD Card Slot: For program/data transfer and logging Environmental & Standards Operating Temperature: −10 °C to +55 °C (horizontal install) Storage Temperature: −25 °C to +70 °C Certifications/Standards: CE, CSA, cULus, RCM, EAC, IACS E10, and complies with IEC 61131‑2, IEC 61010 etc.