Technical Parameters (EC20-8TC) Model: EC20-8TC Product Type: 8-Channel Thermocouple Input Expansion Module Compatible PLC Series: EC20 Series Modular PLC Number of Channels: 8 channels (differential inputs) Thermocouple Types Supported (per channel selectable): J (Iron-Constantan): -200°C to +1200°C K (Chromel-Alumel): -200°C to +1372°C T (Copper-Constantan): -200°C to +400°C E (Chromel-Constantan): -200°C to +1000°C R (Platinum-Rhodium): 0°C to +1768°C S (Platinum-Rhodium): 0°C to +1768°C B (Platinum-Rhodium): +100°C to +1820°C N (Nicrosil-Nisil): -200°C to +1300°C Resolution: 15-bit to 16-bit (typical, including sign) Accuracy: ±0.5% of reading or ±1°C (whichever greater, typical, excluding sensor error) Cold Junction Compensation: Built-in, automatic with multiple sensors for uniformity CJC Accuracy: ±0.5°C to ±1.0°C typical Temperature Drift: <50ppm/°C (typical) Conversion Speed: Fast conversion (typical <100ms per channel, <800ms for all channels) Input Impedance: >1MΩ (typical) Maximum Input Voltage: ±30V DC (withstand without damage) Open Circuit Detection: Automatic detection per channel, configurable response Noise Rejection: 50/60Hz normal mode rejection (>60dB typical) Common Mode Rejection: >100dB typical Isolation: Photocoupler isolation between thermocouple inputs and PLC internal circuits (500V AC typical) Data Format: Temperature value in PLC registers (typically in 0.1°C or 0.1°F units) Indicators: Power LED (green), module status LED (green/red), per-channel status via software Expansion Bus Connection: Via EC20 expansion connector (right-side connection for daisy-chain) Power Supply: Supplied from EC20 CPU via expansion bus (typically 5V DC and 24V DC) Power Consumption: Moderate power consumption (typically <2.5W) Terminals: Pluggable screw terminal blocks (removable for easy wiring) Wire Size: 0.2 - 2.5 mm² (24-12 AWG) Protection Class: IP20 (requires enclosure for installation) Operating Temperature: 0°C to +55°C Storage Temperature: -20°C to +70°C Humidity: 5% to 95% RH (non-condensing) Dimensions (H x W x D): Approx. 130 mm x 70 mm x 100 mm (5.1" x 2.8" x 3.9") - typical for 8-channel module Weight: Approx. 0.2 kg (0.44 lbs) Standards: CE, UL (pending), RoHS, compliant with EC20 system specifications