Rockwell Automation T8831 Trusted 40 Channel Analogue Input FTA Non Incentive User Manual
Sds-8831, Trusted, Industrial control system trusted
SDS-8831
Trusted
TM
Industrial Control System
Trusted
TM
40 Channel Analogue Input FTA Non Incendive – T8831
Issue 5 Jan 2006
ASSEMBLY
DESCRIPTION
The 40-channel T8831 Trusted
TM
Field
Termination Assembly (FTA) is the primary
interface between the Trusted
TM
TMR Analog
Input module and the field device (wiring) loop.
The model T8831 is designed for use in non-
incendive applications. The FTA is supplied
with both 150
loop current and 250
dropping resistors.
The FTA is made up of several components:
the interface cable connector and hood lock,
loop power distribution, dropping resistors, and
field input terminations.
To reduce integration time, the interface cable
which connects the FTA and its I/O module is
pre-assembled and fitted with a pair of
specialized hoods. These hoods are used to
secure the cable in place. The FTA hood fits
into the metal slot retainer shown in the
illustration at left.
To facilitate the need for on-line
replacement of an unhealthy I/O
module, the interface cable is designed
to provide the user with two different
methods for on-line maintenance. The
first method involves the use of a dual
connector hood. The dual connectors
allocate an adjacent slot in the
Trusted
TM
chassis for a hot-replacement
module. Refer to Figure 1 below for
more details regarding a dedicated
spare slot approach.
The second method of hot replacement
uses a “one-to-many” approach. This
feature is called the SmartSlot Link
(SSL). The SSL furnishes the method
to use a single I/O module slot as a hot
replacement slot. This configuration
reduces I/O chassis space by using a
single slot for hot replacement of all
modules of that type. In this case the I/O
cable has a second socket on the back
of the module end for connecting a
cable to the hot replacement slot.
Figure 1
FEATURES
40 TMR input points
per module
Easy to mount and
replace
Industry standard
field device
connections
Standard DIN rail
compatibility
Loop current
limiting and
dropping resistors
pre-installed
Small physical size
Low cost
On-board LED for
loop power integrity
indication
Interface
Cable
F
ie
ld
D
ev
ic
e
Dual Hood
P
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H
ot
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M
od
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FTA
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