Product:ICS Triplex T8461 TrustedTM TMR 24/48V dc Digital Output Module

The TrustedTM TMR 24/48V dc Digital Output module interfaces to 40 field output devices. Outputs are arranged in five groups of eight. All outputs in a group share a common power source and return. Fault tolerance is achieved through Triple Modular Redundancy (TMR) within the same module for each of the 40 output channels.

The module provides on-board Sequence of Events (SOE) reporting with a resolution of 1ms. The “event” is the actual sensing of the field device loop current. Each triplicated section (slice) of the module, receives output instructions from the TrustedTM TMR Processor and sends its data to an internal safety layer hardware voter. Each slice uses the voted data to control the outputs. Every output channel consists of a six-element voted array. The output switch array provides fault tolerant, uninterrupted control under an output switch failure condition. Output switching and fault diagnostics comply with the demanding requirements of IEC61508 SIL-3 for First Fault - Fault Tolerant, and Second Fault - Fail Safe outputs.

Modules may be placed in any I/O module slot in a TrustedTM Processor Chassis or Expander chassis. Once the I/O module configuration is set, mechanical keying is available on all I/O modules to prevent inserting a module into an incorrect slot. Configuration of the module is carried out using the TrustedTM Toolset running on an Engineering Workstation. Once configured and loaded into the TrustedTM Controller, replacement modules are on-line educated by the TMR Processor.

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