User guide

Trusted
TM
Module T8449
Issue 13 Apr 10 PD-T8449 8
1. Description
T
he TMR 24Vdc Valve Monitor module is a member of the Trusted
T
M
H
igh Integrity I/O Product Range.
All High Integrity 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 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 High Integrity I/O modules are made up of 4 sections: Host Interface Unit (HIU), the Field Interface
Unit (FIU), the Field Termination Unit (FTU), and the Front Panel Unit (or FPU).