Rockwell Automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Module - Manual (Page 8)

Trusted
TM
Module T8423
Issue 15 Apr 10 PD-T8423 8
1. Description
The Trusted TM TMR 35-120Vdc Digital Input module is a member of the Trusted TM range of
Input/Output (I/O) modules. All Trusted TM I/O modules share common functionality and form. At the
most general level, all I/O modules interface to the Inter-Module Bus (IMB) which provides power and
allows communication with the Trusted
TM TMR Processor. In addition, all modules have a field
interface that is used to connect to module specific signals in the field. All modules are Triple Modular
Redundant (TMR).
Figure 1 Module Architecture
All Trusted TM I/O modules comprise four sections: Host Interface Unit (HIU), the Field Interface Unit
(FIU), the Field Termination Unit (FTU) and the Front Panel Unit (or FPU).