Product Short Description

Product Name: Dual Analogue Input Termination Assembly

Product Brief: Dual redundant analogue input termination assembly, supporting two analogue input modules, used for redundant signal acquisition of field transmitters in safety systems.

Technical Specifications:

  • Channel Quantity: 16 analogue input channels

Description

  • Supported Signal: 4–20mA two-wire transmitter signal
  • Loop Resistance: 135Ω ±0.2Ω
  • Channel Fuse: 50mA 125V Type T fuse
  • Isolation Voltage: 1500V DC
  • Power Dissipation: 0.08W per signal loop
  • Operating Temperature: -20°C ~ +70°C
  • Weight: 160g

    Function Features:

  • Dual module support, applicable for dual redundant and triple redundant system architecture
  • Independent channel fuse protection for each acquisition loop
  • Support simplex/dual/TMR redundant system configuration switching
  • Built-in loop power supply for field 4–20mA transmitters

    Working Principle: Provide power supply for field analogue transmitters, collect analogue measurement signals, transmit signals to redundant analogue input modules, monitor loop open circuit and short-circuit faults.

    Material Composition: Conformal coated FR4 circuit board, engineering plastic housing, corrosion-resistant copper terminals.

    Structural Characteristics: DIN rail / rack dual mounting compatible; layered wiring layout, separate signal and power terminals.

    Application Scenarios: Refinery SIS system, natural gas pipeline monitoring, chemical reactor parameter acquisition, thermal power plant pressure/temperature signal collection.

    Installation Requirements: Separate analogue signal wiring from power wiring; maintain more than 30cm distance from high-frequency equipment; cabinet ventilation is required.

    Usage Notes: All signal cables use shielded twisted pair; shield single-end grounding; do not mix analogue input and digital signal wiring on the same assembly.

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