ICS Triplex T8293

ICS Triplex T8293

Product Brief Introduction: T8293 is rack‑mounted high‑integrity fused power‑distribution unit (PDU) for Trusted safety‑system. It receives redundant 24‑48 VDC input power from rack‑side power‑supply modules, distributes to 15 independent fused output branches for I/O modules and field‑instrument loops. Each branch equips independent fuse‑protection and branch‑fault‑diagnostic circuit, realizes fault containment and real‑time branch‑fault alarming, meets high‑safety‑level power‑distribution requirement of SIL 3 safety‑instrumented‑system.

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Description

ICS Triplex T8293

Technical Specifications & Performance Parameters:

  • Input Power Range: 22‑55 VDC dual‑redundant DC input, nominal 24 VDC / 48 VDC
  • Number of Output Branches: 15 independent fused output channels
  • Per‑Branch Max Output Current: 3 A
  • Per‑Branch Fuse Specification: User‑configurable slow‑blow cartridge fuse
  • Total Module Rated Output Power: 360 W
  • Input Isolation: Galvanic isolation between dual‑redundant input branches
  • Backplane Communication Interface: Trusted IMB backplane bus for fault‑data transmission
  • Module Power Consumption: Max 4.5 W
  • Protection Mechanisms: Per‑branch fuse over‑current protection, input reverse‑polarity protection, over‑temperature protection
  • Safety Certification: TÜV IEC 61508 SIL 3, UL, CE
  • Operating Temperature: ‑20 °C ~ +60 °C
  • Storage Temperature: ‑40 °C ~ +85 °C
  • Ambient Humidity: 5 %‑95 % RH non‑condensing
  • Weight: 1.30 kg
  • Form Factor: Standard Trusted rack plug‑in module

Functional Features:

  • Dual‑redundant DC input design, automatic load‑sharing between two input power‑sources
  • 15 independent fused power‑output branches, each branch provides individual over‑current fuse‑protection
  • Per‑branch real‑time fault‑diagnostic circuit, detect fuse‑blow, branch‑over‑load and branch‑short‑circuit fault
  • Hot‑swap support for online module replacement without interrupting other normal power‑distribution branches
  • Front‑panel LED indicator array, display dual‑input power‑health status and each output‑branch fault‑alarm status
  • Timestamped branch‑fault‑events upload to system fault historian via IMB backplane bus
  • Hardware‑level fault‑isolation, single‑branch short‑circuit or over‑current fault only triggers corresponding branch fuse‑blow, and cannot affect other output branches and upstream power‑supply
  • Support flexible fuse‑specification configuration according to actual field‑loop load‑current requirement

Working Principle: Two independent upstream DC power‑sources access T8293 dual‑redundant input terminals. Internal power‑OR‑ing circuit realizes automatic load‑sharing for two input branches. Input power distributes to 15 independent output branches. Each branch current passes user‑configured fuse‑protection unit, then outputs to downstream I/O‑module or field‑instrument‑load. On‑board diagnostic‑sampling circuit monitors voltage and current state of each output branch continuously. When branch over‑current occurs, corresponding fuse blows for fault‑isolation. Diagnostic circuit captures fuse‑blow signal, triggers front‑panel LED alarm and generates timestamped fault‑event to transmit to Trusted main system via IMB backplane bus. Single‑branch fault gets limited inside local branch, and cannot spread to other power‑output branches and upstream power‑supply circuit.

Material Composition & Structural Characteristics:

  • Housing: High‑strength die‑cast aluminum alloy shell, realize electromagnetic shielding and auxiliary heat dissipation
  • Circuit substrate: Multi‑layer FR‑4 power‑grade industrial printed circuit board, integrate power‑OR‑ing, fuse‑holder and branch‑diagnostic sampling components
  • Backplane connector: Gold‑plated high‑density anti‑vibration industrial connector
  • Front panel: Flame‑retardant PC engineering plastic, embed LED indicator window and independent fuse‑replacement access holes, protection grade IP20
  • Plug‑in card‑type structure for Trusted rack dedicated power‑distribution‑slot installation

Installation Requirements:

  • Insert T8293 module into dedicated power‑distribution slot of Trusted rack chassis, fully tighten front‑panel locking screws
  • Dual DC input terminals connect to two physically independent upstream DC power‑supply units to realize true redundancy
  • Select matched‑specification branch fuses strictly according to actual downstream‑load rated‑current
  • Downstream power‑distribution wiring adopt shielded power cables, separate routing from high‑voltage AC power cables
  • Cabinet protective ground resistance ≤4 Ω
  • Total sum‑of‑current of all output branches cannot exceed total rated output‑power limit of T8293
  • Keep installation location away from corrosive‑gas and salt‑fog environment

Application Scenarios:

  • Trusted safety‑instrumented‑system internal I/O‑module multi‑branch fused power‑distribution
  • Petrochemical ESD system field‑instrument multi‑loop independent protected power‑feeding
  • Chemical plant safety‑interlock cabinet high‑integrity multi‑branch fault‑containment power‑distribution unit
  • Off‑shore oil‑gas platform safety‑rack fused power‑distribution infrastructure
  • Power‑plant safety‑shutdown system safety‑loop multi‑branch protected power‑supply

Usage Notes:

  • Hot‑swap operation is permitted only when dual‑redundant input power‑sources maintain normal power‑supply
  • Module shell disassembly is forbidden; internal high‑current power‑circuit exists, zero user‑serviceable internal components except matched‑specification branch fuses
  • Cut off corresponding branch downstream‑load power before replacing branch fuse
  • After module replacement, verify dual‑input redundant‑switching function, each branch power‑output function and branch‑fault‑diagnostic response performance
  • Operate strictly within rated operating temperature and total‑power‑output specification limits
  • Periodically inspect input‑wiring and output‑branch‑wiring terminal fastening torque and fuse‑integrity status

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