Rockwell-automation T8160 Trusted TMR Interface Instrukcja Użytkownika Pobierz pdf (Strona 9)

Trusted

TMR Module T8160

Issue 13 May 13 PD-T8160 9

1. Description

Figure 1 shows a block diagram of the Trusted

TMR Interface.

Figure 1 Block Diagram of the Trusted

TMR Interface

The Trusted

TMR Interface is a Triple Modular Redundant (TMR), fault tolerant design containing six

fault containment regions (FCR):

1. FCRs A, B, and C are processor sub-systems, each containing a processor, an I/O

Processor logic unit, a Bus Interface, an I/O Safetybus interface and a power supply. The

processor sub-systems work in lock-step synchronisation with each other.

2. FCR D is the front panel interface.

3. FCRs E and F are the master and secondary master oscillators of the HIFT system clocks.

Each module processor sub-system has interfaces to the Inter-Module Bus and the Regent I/O

Safetybus. These interfaces consist of an input voter, discrepancy detector logic, and an output driver.

The voting and fault detection circuits allow the processor sub-systems to identify and isolate transient,

intermittent, and permanent faults as they occur. All faults are recorded in the system’s fault history.

The module’s triplicated processor and Regent+Plus I/O interfaces ensure that no failure in the module

will affect the operation of Trusted

or Regent+Plus systems.

The triplicated power supply unit receives dual redundant +24V dc from the Controller chassis

backplane, and converts the supply to the logic levels required by the module circuits. The module is

capable of operating with a failure of either of the redundant power feeds.

The Trusted

TMR Interface has three external interfaces:

1. Trusted

Inter-Module Bus. Triplicated, high-speed interface to the Trusted

TMR

Processor.

2. Regent I/O Safetybus Interface. Fully triplicated, synchronised RS-485, 8-bit parallel data with

clock and sync signals to the Regent and Regent+Plus I/O sub-system.

3. Front Panel Facilities. Status and fault indicators.

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Rockwell-automation T8160 Trusted TMR Interface Instrukcja Użytkownika Strona 9