Technical Parameters (EC20-4AD) Model: EC20-4AD Product Type: Analog Input Expansion Module Compatible PLC Series: EC20 Series Modular PLC Number of Channels: 4 channels (typically differential inputs) Input Types: Voltage or Current (selectable per channel or via wiring) Input Ranges: Voltage: 0-10V DC, 0-5V DC, ±10V DC, ±5V DC (programmable) Current: 0-20mA, 4-20mA (with external resistor or internal shunt) Resolution: 12-bit to 16-bit (typical, depending on range and model variant) Accuracy: ±0.5% to ±1.0% of full scale (typical) Conversion Speed: Fast conversion per channel (typical<5ms per channel, <20ms for="" all="" input="" impedance:="" voltage="" mode:="">100kΩ (typically 200kΩ) Current mode: 250Ω (with external resistor or built-in shunt) Temperature Drift: <50ppm/°C (typical) Isolation: Photocoupler isolation between analog input and PLC internal circuits (500V AC typical) Data Format: Digital value in PLC registers (typically 0-4000, 0-16000, or 0-32000 depending on resolution) Indicators: Power LED (green), module status LED (green/red) 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: Low power consumption (typically <2W) 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 50 mm x 100 mm (5.1" x 2.0" x 3.9") - typical EC20 expansion module size Weight: Approx. 0.15 kg (0.33 lbs) Standards: CE, UL (pending), RoHS, compliant with EC20 system specifications