ICS Triplex T8448 Trusted TMR 24VDC Zone Interface Module

Product Description
T8448 is an ICS Triplex Trusted T8000 series zone interface module for SIL3 safety instrumented systems. It works as the interface between the Trusted TMR backplane and field termination unit T8842 VFTA, handling 24VDC field digital signals. It adopts triple modular redundancy 2oo3 voting architecture, built-in comprehensive diagnostics for field circuit faults, and supports hot-swap replacement during system operation. This module is widely used in ESD, F&G safety loops for oil, gas and power plants.

Key Features

• TMR triple redundant design, SIL3 certified to IEC61508, single fault tolerance
• 24VDC operating voltage (18–30VDC), dedicated zone interface for digital field signals
• Matched with T8842 VFTA versatile field termination assembly for field wiring
• Full on-board diagnostics: wire open, short circuit, module internal fault detection
• Hot swap capability, online replacement without system shutdown
• LED status indicators for module health, channel and fault status
• Wide operating temperature range, rugged construction for harsh industrial environments
• Part of Rockwell ICS Triplex Trusted platform; original production discontinued, available as spare parts

Application Scenarios

• Oil & gas, refinery ESD emergency shutdown safety systems
• Power plant boiler, turbine safety interlock and fire & gas (F&G) systems
• Chemical and petrochemical plant SIS safety instrumented systems
• Offshore platform safety control and legacy Trusted system spare replacement

FAQ

Q: What FTA matches T8448?
A: T8842 VFTA versatile field termination assembly is the matching termination unit for T8448.

Q: What safety level does T8448 achieve?
A: SIL3, certified for safety instrumented loops per IEC61508 standard.

Q: Can T8448 be hot swapped?
A: Yes, hot-swap supported under normal operating conditions of the Trusted rack.