Technical Specifications: Input Signal Type: Dry‑contact relay signal, digital level signal Input Voltage Range: 85 VAC to 264 VAC, 88 VDC to 300 VDC Input Impedance: Standard industrial input impedance value Input Current: Typical operating current, maximum limited current Response Time: ≤15 ms Channel‑to‑Backplane Isolation Voltage: 500V RMS Transient Surge Suppression: 1500V Operating Power Supply: 24VDC auxiliary power Communication Protocol: RS485, Ethernet, internal backplane bus for UR system Operating Temperature: -40 °C to +85 °C Storage Temperature: -50 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard full‑height single‑slot module for UR rack Certifications: CE, UL, IEC power protection standard compliance
Functional Features: Supports multi‑channel relay signal acquisition and level conversion. Provides hardware filtering to suppress industrial electromagnetic interference. Implements hardware redundant design for channel fault tolerance. Built‑in comprehensive self‑diagnosis for channel status, power supply and internal circuit. 
Application Scenarios: Power substation protection and control system. Emergency trip interlock system for power plant facilities. Generator set protection and status monitoring. High‑voltage cabinet auxiliary signal processing.
Structural Characteristics: Standard single‑slot plug‑in structure matching Multilin UR series rack. Front panel with status indicator LED lamps for power, channel fault and communication. Field signal terminals located at module front side for wiring maintenance. Backplane golden finger interface for internal system bus connection.
Working Principle: Field relay and status signals enter through terminal connectors. Hardware filter circuits eliminate high‑frequency interference signals. Isolation optocouplers complete electrical isolation between field circuit and internal logic circuit. Redundant processing units capture switch edge signals, execute logic judgment and contact driving.
Installation Requirements: Install the module into designated slot of Multilin UR series standard rack. Ensure rack ground connection strictly follows system grounding specification. Field signal wiring must use shielded twisted‑pair cables. Separate power cable and signal cable routing to avoid crosstalk.
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