Front panel voting bus, Isolation, Figure 2 functional block diagram showing trusted – Rockwell Automation T8110B/T8110 Trusted TMR Processor User Manual
Page 22: Tmr processor communications, Trusted
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TMR Processor T8110B/T8110
Issue 18 Feb 08
PD-T8110B/T8110
22
3.3.4. Front Panel Voting Bus
The front panel voting bus provides the following functions:
Figure 2 Functional Block Diagram showing
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TMR Processor Communications
3.4. Isolation
All signals exchanged between FCRs are protected to prevent the propagation of faults between
independently powered FCRs .
The front panel diagnostics port is electrically isolated from the front panel FCR.
The processor and front panel FCR provide electrical isolation for the 24V dc power feed in addition to
the POWER WARNING signal.
• voted watchdog signal to the front panel for indicating Processor faults.
• voted serial data to the front panel for communications, front panel indicators, etc.
• protected serial data from the front panel for communications, front panel status, etc.