Rockwell Automation T8433 Trusted TMR Isolated 4-20 mA Analogue Input Module - 20 Channel - Manual (Page 8)

Trusted
TM
Module T8433
Issue 11 Apr 10 PD-T8433 8
1. Description
The TMR Isolated 4-20 mA Analogue 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 High Integrity 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).
FRONT
PANEL
UNIT
FIELD
INTERFACE
UNIT
(FIU)
HIU POWER
SUPPLY
FIU POWER
SUPPLY
IS
O
LA
T
IO
N
FIELD
TERMINATION
UNIT
(FTU)
HOST
INTERFACE
UNIT
(HIU)
V1
V2
FCR A
FCR D
FIELD
INTERFACE
UNIT
(FIU)
HIU POWER
SUPPLY
FIU POWER
SUPPLY
IS
O
LA
T
IO
N
HOST
INTERFACE
UNIT
(HIU)
V1
V2
FIELD
INTERFACE
UNIT
(FIU)
HIU POWER
SUPPLY
FIU POWER
SUPPLY
IS
O
LA
T
IO
N
HOST
INTERFACE
UNIT
(HIU)
V1
V2
FCR B
FCR C
IMB A
IMB B
IMB C
FCR INTERCONNECT BUS Smart Slot Link
Smart Slot Link
Smart Slot Link
ISOLATOR 24V1
ISOLATOR 24V2
V1 V2
LED's
CHASSIS POWER ISOLATION