Technical Specifications: Input Signal Type: Auxiliary dry‑contact signal, digital status signal Input Voltage Range: 125 VDC to 250 VAC 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: Backplane bus power supply Communication Protocol: 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, industrial EMC standard compliance
Functional Features: Supports multi‑channel auxiliary signal acquisition and level conversion. Provides hardware filtering to suppress industrial electromagnetic interference. Implements hardware redundant design for channel fault tolerance. 
Application Scenarios: Substation secondary control cabinet signal expansion. Power plant auxiliary equipment monitoring system. Industrial high‑voltage distribution interlock system. Power protection auxiliary‑loop signal collection. Energy‑industry safety interlock control loops.
Performance Parameters: Backplane bus maximum transmission rate: 10 Mbps Signal measurement accuracy: Consistent with Multilin UR series specification Fault tolerance: Single‑channel fault will not interrupt module overall function Mean Time Between Failures
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.
Working Principle: Field auxiliary 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.
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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