Rockwell Automation T8311 Trusted Expander Interface - Manual (Page 21)

Trusted
TM
Module T8311
Issue 12 Mar 07 PD-T8311 21
4.2. Communication Busses
4.2.1. Expander bus
Each TMR Expander Interface Module contains a Bus Interface, isolation components and
transceivers to the Expander Bus. The triplicated Expander Bus provides communication
interconnection between the TMR Processor Chassis and the Expander Chassis at a data transfer rate
of 1.5GMbps via UTP cables.
4.2.2. Inter-Module Bus
Each TMR Expander Interface Module FCR contains a Bus Interface to the Inter-Module Bus. The
triplicated Inter-Module Bus provides communication interconnection between modules in the TMR
Controller Chassis, at a data transfer rate of up to 12.5Mbps.
The Inter-Module Bus handles the following triplicated signals:
Data - 8-bit, bi-directional bus.
Control - Bus clocks, module enables and bus direction control.
System Watchdog - System Watchdog signal to the modules.
Power Fail - System power fail warning to modules.
Slot - Indicating the left or right Trusted TM TMR Expander Processor slot
position to the Trusted TM TMR Processor.
Chassis ID - a 4-bit code indicating the chassis number or id.