Core Features Safety-Rated Current-to-Current (I-I) Signal Isolation: Functions as a SIL 2/PLd certified industrial signal conditioner designed to convert and isolate 4–20mA input current signals to standardized 4–20mA output signals. It meets IEC 61508 SIL 2 and EN ISO 13849-1 PLd safety standards, ensuring reliable signal transmission for safety-critical systems (e.g., emergency stop circuits, process shutdown controls) where signal integrity directly impacts personnel or equipment safety. Dual-Channel Redundancy & Fault Detection: Integrates two independent signal conversion channels (labeled "44" in the model) with built-in fault detection to prevent single-point failures. Each channel monitors for input/output signal anomalies (e.g., open circuits, overcurrent) and triggers a fault alert if issues occur—critical for maintaining safety functionality in redundant industrial control loops. High Isolation & Noise Immunity: Features 3-port galvanic isolation (input-output-power, 2.5kVrms isolation voltage) to eliminate ground loops and block conducted noise from heavy machinery or unstable grids. This protects safety-critical controllers (e.g., safety PLCs, DCS) from voltage spikes, ensuring consistent signal transmission in high-EMI industrial environments. Industrial Durability & Wide Compatibility: Built for harsh safety-critical settings, with an IP20 protection rating (IEC 60529) to shield internal components from dust and accidental contact. It operates reliably in temperatures from -25°C to +70°C, compatible with extreme industrial environments (e.g., refineries, manufacturing plants). It supports 24V DC power supplies (19.2–30V DC) and works with all standard 4–20mA safety sensors/controllers, requiring no complex configuration. Slim Design & Safety-Centric Monitoring: Features a compact, DIN-rail mountable form factor (35mm standard rail) with a width of only 25mm—ideal for dense safety control cabinets. Tool-free screw terminals (accepts 0.2–1.5mm² cables) enable secure wiring, while dual-color LED indicators (one per channel: green = normal, red = fault) provide instant visual feedback on signal status—simplifying safety audit and troubleshooting. Typical Applications The Phoenix Contact MCR-CPSS-I-I-44-E-2810900 is engineered for safety-critical 4–20mA signal conditioning—ideal for scenarios where functional safety standards (SIL 2/PLd) are mandatory—with core use cases including: Safety PLC Signal Isolation: Converts and isolates 4–20mA signals from emergency stop sensors or pressure safety transmitters to safety PLCs (e.g., Siemens S7-1500F, Allen-Bradley GuardLogix) in process industries. The SIL 2 rating ensures compliance with IEC 61508 for process shutdown systems, preventing accidental machinery activation. Emergency Stop (E-Stop) Circuit Signal Conversion: Conditions 4–20mA signals from redundant E-Stop buttons to safety relays in manufacturing lines (e.g., automotive stamping plants). Dual-channel redundancy eliminates single faults, meeting EN ISO 13849-1 PLd requirements for machinery safety. Hazardous Area Safety Signal Transmission: Isolates 4–20mA signals from intrinsically safe sensors (in Zone 1/2) to non-hazardous-side safety controllers. Galvanic isolation blocks voltage spikes, ensuring safe signal transmission while complying with IEC 60079-0 standards for explosive atmospheres. Process Safety Shutdown System Signal Conditioning: Transmits 4–20mA signals from level or temperature safety sensors to process shutdown controllers in chemical plants. The high accuracy maintains linearity between sensor input and safety action, ensuring timely shutdowns to prevent overflows or overheating—complying with IEC 61511 standards for process safety.