ICS Triplex T9851

ICS Triplex T9851

Product Brief Introduction: T9851 is simplex‑architecture field termination assembly for Trusted digital output modules. It completes wiring‑termination, surge‑suppression and signal‑conditioning work for 8‑channel 24 VDC digital output signals. This module applies to non‑safety‑critical auxiliary‑control loops inside Trusted system, cooperates with rack‑mounted simplex digital‑output modules to drive ordinary field indicator lamps and auxiliary relays.

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Description

ICS Triplex T9851

Technical Specifications & Performance Parameters:

  • Supported Output Signal: 24 VDC discrete digital output
  • Channel Quantity: 8 field output channels
  • Per‑Channel Continuous Output Current: Max 0.5 A
  • Load Type: Resistive load, inductive auxiliary relay load
  • Galvanic Isolation Rating: 1500 V basic isolation between I/O‑module side and field‑side
  • Power Consumption: Max 3.6 W
  • Protection Mechanisms: Channel‑level surge‑suppression, short‑circuit current‑limiting protection
  • Safety Certification: UL, CE, non‑SIL for non‑safety‑critical loops
  • Operating Temperature: ‑20 °C ~ +60 °C
  • Storage Temperature: ‑40 °C ~ +85 °C
  • Ambient Humidity: 5 %‑95 % RH non‑condensing
  • Weight: 0.41 kg
  • Form Factor: DIN‑rail‑mounted cabinet‑internal field termination assembly

Functional Features:

  • 8‑channel simplex digital‑output signal physical transition for Trusted I/O modules
  • Channel‑level surge‑suppression circuit, absorb back‑EMF generated by inductive‑load switching
  • Basic galvanic‑isolation design, reduce mutual‑interference between I/O‑module side and field‑side
  • Screw‑type wiring terminal blocks for field‑actuator cable termination
  • Dedicated ribbon‑cable realizes signal‑connection between T9851 and rack‑mounted digital‑output module
  • Front‑panel per‑channel LED indicators, reflect real‑time output‑drive state
  • Compact mechanical dimension, save cabinet DIN‑rail installation space
  • No safety‑related TMR voting function, suitable for non‑safety‑critical auxiliary‑control application scenarios

Working Principle: Drive‑signals from Trusted rack‑mounted simplex digital‑output module transmit through dedicated ribbon‑cable to T9851 internal circuit. Signals pass isolation circuit and surge‑suppression components, then output to field‑side auxiliary‑relay or indicator‑lamp loads via screw‑type terminals. Surge‑suppression components absorb counter‑electromotive force generated by inductive‑load switch‑off. Front‑panel LED indicators change status following output‑drive signal variation. T9851 purely completes signal‑transition and load‑protection work, and does not undertake safety‑logic computation.

Material Composition & Structural Characteristics:

  • Housing: Flame‑retardant ABS engineering plastic housing
  • Circuit substrate: Multi‑layer FR‑4 industrial printed circuit board, integrate surge‑suppression and isolation components
  • Field connection: Screw‑type wiring terminal blocks
  • Internal interconnection: Gold‑plated ribbon‑cable connector
  • Front panel: Embedded LED indicator group and channel‑marking area, protection grade IP20

Installation Requirements:

  • Mount T9851 on standard DIN‑rail inside control cabinet, install adjacent to matched Trusted I/O rack
  • Adopt factory‑specified dedicated ribbon‑cable for connection with rack‑side digital‑output module
  • Field‑output wiring use shielded cables, separate routing from high‑voltage power cables
  • Cable shielding layer single‑end grounding at cabinet ground bus‑bar
  • Cabinet protective ground resistance ≤4 Ω
  • Total field‑load current must not exceed total allowable output current of T9851
  • Do not deploy this module for SIL‑level safety‑critical control‑loop

Application Scenarios:

  • Trusted system non‑safety‑critical auxiliary‑indicator‑lamp driving signal termination
  • Auxiliary‑control loop ordinary relay output‑signal wiring transition
  • Petrochemical plant non‑safety‑class auxiliary‑equipment control‑signal interface
  • Chemical workshop ordinary status‑annunciation‑light output terminal unit
  • Off‑shore platform non‑safety‑critical auxiliary‑equipment control‑signal distribution

Usage Notes:

  • Cut off field‑side load power supply before executing field‑wiring modification
  • Do not use non‑standard ribbon‑cables for interconnection with Trusted I/O module
  • Module shell disassembly is forbidden; zero user‑serviceable internal components
  • This module cannot be used in IEC 61508 SIL‑level safety‑critical loops
  • After module replacement or cable rework, verify each channel output‑drive state matches field‑device action
  • Operate strictly within rated operating temperature range
  • Periodically inspect wiring‑terminal fastening torque and field‑load current status

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