Technical Specifications: Signal Type: Analog and discrete field I/O signal termination Surge Protection: Built‑in transient surge suppression component for field input signal Terminal Type: Compression‑type wiring terminal block Internal Interface: Dedicated flat‑cable connector for connecting D20C I/O processing module Operating Temperature: ‑10°C to +55°C Storage Temperature: ‑40°C to +85°C Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: D20 series chassis plug‑in termination unit Certifications: CE, power‑industry substation equipment EMC compliance
Functional Features: Centralized termination for all field analog and discrete I/O signal wiring of D20C system. Built‑in surge protection circuit suppresses lightning and transient surge interference from field loop. Signal transition between field wiring and D20C upper‑layer I/O processing board via dedicated cable. 
Application Scenarios: D20 substation automation system field signal wiring termination unit. Power‑substation control cabinet D20C I/O loop transition and protection. D20C system maintenance spare‑part replacement project.
Structural Characteristics: Plug‑in module structure for D20 series chassis installation. Front‑panel large‑quantity compression‑type signal terminal blocks for field wiring access.
Working Principle: All field sensor, switch and actuator signal cables are connected to front‑panel terminal blocks. External transient surge interference is absorbed by built‑in surge‑protection components.
Installation Requirements: Install D20C TERMINATION into designated slot of D20 standard chassis.
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