Technical Parameters Basic Information Model: ACT20X-2HAI-2SAO-P Order Number: 2456150000 Channel: 2 Isolated Input Channels + 2 Isolated Output Channels Mounting: Standard TS35 DIN top-hat rail Housing Width: 22.5 mm slim design Connection: Screw clamp terminal Net Weight: 212 g Power Supply Operating Voltage: 19.2 ~ 31.2 VDC (Nominal 24VDC) Power Consumption: Max 1.9 W Input Specifications (Ex Intrinsically Safe Side) Input Signal: 4 ~ 20 mA DC, active/passive loop supported HART Compatibility: Bidirectional transparent HART transmission, 0.5~2.5kHz Wire Break Diagnosis: Output signal drops below 1mA for open-circuit alarm Sensor Supply Voltage: 3.8 ~ 26 VDC Output Specifications (Safe Side) Output Signal: 4 ~ 20 mA programmable current signal Max Load Resistance: ≤ 600 Ω Signal Reverse Supported: 20~4mA reverse output optional Response Time: ≤ 5 ms Accuracy & Isolation Performance Basic Accuracy: ＜ 0.1 % FS (Full Scale) Temperature Coefficient: ＜ 0.01 % FS / ℃ Isolation Voltage: 2.6 kV (Input ↔ Output galvanic isolation) Overvoltage Category: II; Pollution Degree: 2 Alarm Function Fault Output: 1-channel voltage-free NC relay contact Trigger Condition: Input wire break, over-range, power failure, module fault Mechanical & Environmental Parameters Overall Dimension: 127.3 (H) × 22.5 (W) × 114.6 (D) mm Operating Temperature: -20 ℃ ~ +60 ℃ Storage Temperature: -20 ℃ ~ +85 ℃ Relative Humidity: 0 ~ 95% RH, non-condensing Protection Class: IP20 (cabinet indoor installation) Max Altitude: ≤ 2000 m Safety & Certifications Functional Safety: SIL 2 compliant (IEC 61508), SFF=80%, MTBF=177 years Hazardous Area Approval: ATEX / IECEx for Zone 0, Zone 1, Zone 2 Safety Compliance: NAMUR NE43 fault diagnosis standard Certifications: cULus (E337701), CE, DNVGL Compliance: RoHS, REACH