Core Features Intrinsically Safe (Ex i) Design for Hazardous Zones: Functions as a certified explosion-proof signal conditioner engineered for use in high-risk hazardous areas (Zone 0/1 for gas, Zone 20/21 for dust). It meets ATEX/IECEx intrinsic safety standards (II 1G Ex ia IIC T4 Ga, II 1D Ex ia IIIC T135°C Da), preventing ignition of flammable gases, vapors, or dust by limiting electrical energy to non-ignitable levels—critical for safe operation in oil refineries, chemical plants, or coal mines. Signal Isolation & Conversion for Process Control: Converts and isolates 4–20mA input signals (from intrinsically safe field sensors) to standardized 4–20mA output signals (for non-hazardous-side controllers). It provides 3-port galvanic isolation (input-output-power, 1.5kVrms isolation voltage) to eliminate ground loops and block noise, ensuring accurate signal transmission between hazardous and non-hazardous zones. Intrinsically Safe Power Supply (RPSSI): Integrates a redundant power supply with intrinsic safety (RPSSI) to power field sensors in hazardous areas. It delivers safe, regulated power (24V DC, max. 100mA) that complies with intrinsic safety limits, eliminating the need for separate intrinsically safe power supplies and simplifying system design. Wide Environmental Durability: Built to withstand extreme hazardous conditions, with an IP20 protection rating (IEC 60529) for dust resistance and operation in temperatures from -25°C to +60°C. The robust plastic housing resists chemical corrosion (compatible with common industrial solvents), ensuring long-term reliability in harsh environments like offshore platforms or chemical processing facilities. Slim Design & Easy Integration: Features a compact, DIN-rail mountable form factor (35mm standard DIN rail) with a width of only 12.5mm—ideal for space-constrained control cabinets in hazardous area control rooms. Tool-free screw terminals (accepts 0.2–1.5mm² cables) enable quick, secure wiring, and a multi-color LED status indicator (green: normal; red: fault) provides real-time monitoring without compromising intrinsic safety. Typical Applications The Phoenix Contact MACX MCR-EX-SL-RPSSI-I-UP-SP-2924029 is engineered for intrinsically safe signal conditioning in hazardous industrial areas—ideal for scenarios where safe, accurate signal transmission between hazardous and non-hazardous zones is critical—with core use cases including: Oil & Gas Sensor Signal Isolation: Converts and isolates 4–20mA signals from intrinsically safe pressure sensors, flow meters, or temperature transmitters in oil refineries (Zone 1). The intrinsic safety design prevents ignition of hydrocarbon vapors, while isolation ensures accurate data transmission to non-hazardous-side DCS systems—complying with IEC 60079-0 standards for explosive atmospheres. Chemical Plant Process Control: Conditions 4–20mA signals from intrinsically safe level sensors (for chemical tanks) in Zone 0, transmitting standardized signals to non-hazardous PLCs (e.g., Siemens S7-1500). The integrated RPSSI powers sensors directly, reducing system complexity and minimizing ignition risks—complying with IEC 61508 standards for functional safety. Mining Dust Hazard Signal Conversion: Isolates 4–20mA signals from intrinsically safe vibration sensors or gas detectors in coal mines (Zone 21). The dust-resistant design and intrinsic safety (Ex ia IIIC) prevent ignition of coal dust, while noise isolation ensures reliable communication with surface control systems—complying with IEC 61241-0 standards for dust explosive atmospheres. Pharmaceutical Solvent Area Signal Handling: Transmits signals from intrinsically safe air quality sensors (monitoring volatile organic compounds) in pharmaceutical manufacturing (Zone 1). The intrinsic safety design meets GMP (Good Manufacturing Practice) requirements for clean, safe production, while accurate signal conversion ensures compliance with process control regulations—complying with IEC 60079-11 standards for intrinsic safety.