Technical Specifications (Parameters) Parameter Description / Value Product Range Modicon M221 Product Type Analogue input cartridge Number of Inputs 2 Analogue Input Type Thermocouple and temperature probe (RTD) Supported Sensors Thermocouples: J, K, R, S, B, T, N, E, C RTD Probes: Pt100, Pt1000, Ni100, Ni1000 Input Resolution 14 bits LSB Value 0.1 °C Sampling Duration 125 ms (thermocouple) / 250 ms (temperature probe) Absolute Accuracy Error ±0.1% of full scale at 25 °C (for Pt/Ni probes); varies by thermocouple type and range Temperature Drift ±0.02% FS/°C Repeat Accuracy ±0.5% FS Non-Linearity ±0.01% FS Input Impedance ≥ 1 MOhm Immunity to Microbreaks 10 ms Electrical Connection 2 screw terminal blocks (pitch 3.81 mm), 3 x 1.5 mm² for inputs Cable Type / Distance Twisted shielded pairs cable < 30 m for input Insulation Non-insulated between analogue input and internal logic Supply Voltage Powered internally by the PLC Product Compatibility Modicon M221C logic controllers Operating Temperature -10…55 °C Dimensions (W x H x D) 35 mm x 41 mm x 15 mm Net Weight 0.015 kg Product Certifications CE, cULus, Green Premium, RoHS, REACH, Mercury free